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 swap_sample_id_all(union perf_event *event, void *data) 458 { 459 void *end = (void *) event + event->header.size; 460 int size = end - data; 461 462 BUG_ON(size % sizeof(u64)); 463 mem_bswap_64(data, size); 464 } 465 466 static void perf_event__all64_swap(union perf_event *event, 467 bool sample_id_all __used) 468 { 469 struct perf_event_header *hdr = &event->header; 470 mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr)); 471 } 472 473 static void perf_event__comm_swap(union perf_event *event, bool sample_id_all) 474 { 475 event->comm.pid = bswap_32(event->comm.pid); 476 event->comm.tid = bswap_32(event->comm.tid); 477 478 if (sample_id_all) { 479 void *data = &event->comm.comm; 480 481 data += ALIGN(strlen(data) + 1, sizeof(u64)); 482 swap_sample_id_all(event, data); 483 } 484 } 485 486 static void perf_event__mmap_swap(union perf_event *event, 487 bool sample_id_all) 488 { 489 event->mmap.pid = bswap_32(event->mmap.pid); 490 event->mmap.tid = bswap_32(event->mmap.tid); 491 event->mmap.start = bswap_64(event->mmap.start); 492 event->mmap.len = bswap_64(event->mmap.len); 493 event->mmap.pgoff = bswap_64(event->mmap.pgoff); 494 495 if (sample_id_all) { 496 void *data = &event->mmap.filename; 497 498 data += ALIGN(strlen(data) + 1, sizeof(u64)); 499 swap_sample_id_all(event, data); 500 } 501 } 502 503 static void perf_event__task_swap(union perf_event *event, bool sample_id_all) 504 { 505 event->fork.pid = bswap_32(event->fork.pid); 506 event->fork.tid = bswap_32(event->fork.tid); 507 event->fork.ppid = bswap_32(event->fork.ppid); 508 event->fork.ptid = bswap_32(event->fork.ptid); 509 event->fork.time = bswap_64(event->fork.time); 510 511 if (sample_id_all) 512 swap_sample_id_all(event, &event->fork + 1); 513 } 514 515 static void perf_event__read_swap(union perf_event *event, bool sample_id_all) 516 { 517 event->read.pid = bswap_32(event->read.pid); 518 event->read.tid = bswap_32(event->read.tid); 519 event->read.value = bswap_64(event->read.value); 520 event->read.time_enabled = bswap_64(event->read.time_enabled); 521 event->read.time_running = bswap_64(event->read.time_running); 522 event->read.id = bswap_64(event->read.id); 523 524 if (sample_id_all) 525 swap_sample_id_all(event, &event->read + 1); 526 } 527 528 static u8 revbyte(u8 b) 529 { 530 int rev = (b >> 4) | ((b & 0xf) << 4); 531 rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2); 532 rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1); 533 return (u8) rev; 534 } 535 536 /* 537 * XXX this is hack in attempt to carry flags bitfield 538 * throught endian village. ABI says: 539 * 540 * Bit-fields are allocated from right to left (least to most significant) 541 * on little-endian implementations and from left to right (most to least 542 * significant) on big-endian implementations. 543 * 544 * The above seems to be byte specific, so we need to reverse each 545 * byte of the bitfield. 'Internet' also says this might be implementation 546 * specific and we probably need proper fix and carry perf_event_attr 547 * bitfield flags in separate data file FEAT_ section. Thought this seems 548 * to work for now. 549 */ 550 static void swap_bitfield(u8 *p, unsigned len) 551 { 552 unsigned i; 553 554 for (i = 0; i < len; i++) { 555 *p = revbyte(*p); 556 p++; 557 } 558 } 559 560 /* exported for swapping attributes in file header */ 561 void perf_event__attr_swap(struct perf_event_attr *attr) 562 { 563 attr->type = bswap_32(attr->type); 564 attr->size = bswap_32(attr->size); 565 attr->config = bswap_64(attr->config); 566 attr->sample_period = bswap_64(attr->sample_period); 567 attr->sample_type = bswap_64(attr->sample_type); 568 attr->read_format = bswap_64(attr->read_format); 569 attr->wakeup_events = bswap_32(attr->wakeup_events); 570 attr->bp_type = bswap_32(attr->bp_type); 571 attr->bp_addr = bswap_64(attr->bp_addr); 572 attr->bp_len = bswap_64(attr->bp_len); 573 574 swap_bitfield((u8 *) (&attr->read_format + 1), sizeof(u64)); 575 } 576 577 static void perf_event__hdr_attr_swap(union perf_event *event, 578 bool sample_id_all __used) 579 { 580 size_t size; 581 582 perf_event__attr_swap(&event->attr.attr); 583 584 size = event->header.size; 585 size -= (void *)&event->attr.id - (void *)event; 586 mem_bswap_64(event->attr.id, size); 587 } 588 589 static void perf_event__event_type_swap(union perf_event *event, 590 bool sample_id_all __used) 591 { 592 event->event_type.event_type.event_id = 593 bswap_64(event->event_type.event_type.event_id); 594 } 595 596 static void perf_event__tracing_data_swap(union perf_event *event, 597 bool sample_id_all __used) 598 { 599 event->tracing_data.size = bswap_32(event->tracing_data.size); 600 } 601 602 typedef void (*perf_event__swap_op)(union perf_event *event, 603 bool sample_id_all); 604 605 static perf_event__swap_op perf_event__swap_ops[] = { 606 [PERF_RECORD_MMAP] = perf_event__mmap_swap, 607 [PERF_RECORD_COMM] = perf_event__comm_swap, 608 [PERF_RECORD_FORK] = perf_event__task_swap, 609 [PERF_RECORD_EXIT] = perf_event__task_swap, 610 [PERF_RECORD_LOST] = perf_event__all64_swap, 611 [PERF_RECORD_READ] = perf_event__read_swap, 612 [PERF_RECORD_SAMPLE] = perf_event__all64_swap, 613 [PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap, 614 [PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap, 615 [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap, 616 [PERF_RECORD_HEADER_BUILD_ID] = NULL, 617 [PERF_RECORD_HEADER_MAX] = NULL, 618 }; 619 620 struct sample_queue { 621 u64 timestamp; 622 u64 file_offset; 623 union perf_event *event; 624 struct list_head list; 625 }; 626 627 static void perf_session_free_sample_buffers(struct perf_session *session) 628 { 629 struct ordered_samples *os = &session->ordered_samples; 630 631 while (!list_empty(&os->to_free)) { 632 struct sample_queue *sq; 633 634 sq = list_entry(os->to_free.next, struct sample_queue, list); 635 list_del(&sq->list); 636 free(sq); 637 } 638 } 639 640 static int perf_session_deliver_event(struct perf_session *session, 641 union perf_event *event, 642 struct perf_sample *sample, 643 struct perf_tool *tool, 644 u64 file_offset); 645 646 static void flush_sample_queue(struct perf_session *s, 647 struct perf_tool *tool) 648 { 649 struct ordered_samples *os = &s->ordered_samples; 650 struct list_head *head = &os->samples; 651 struct sample_queue *tmp, *iter; 652 struct perf_sample sample; 653 u64 limit = os->next_flush; 654 u64 last_ts = os->last_sample ? os->last_sample->timestamp : 0ULL; 655 unsigned idx = 0, progress_next = os->nr_samples / 16; 656 int ret; 657 658 if (!tool->ordered_samples || !limit) 659 return; 660 661 list_for_each_entry_safe(iter, tmp, head, list) { 662 if (iter->timestamp > limit) 663 break; 664 665 ret = perf_session__parse_sample(s, iter->event, &sample); 666 if (ret) 667 pr_err("Can't parse sample, err = %d\n", ret); 668 else 669 perf_session_deliver_event(s, iter->event, &sample, tool, 670 iter->file_offset); 671 672 os->last_flush = iter->timestamp; 673 list_del(&iter->list); 674 list_add(&iter->list, &os->sample_cache); 675 if (++idx >= progress_next) { 676 progress_next += os->nr_samples / 16; 677 ui_progress__update(idx, os->nr_samples, 678 "Processing time ordered events..."); 679 } 680 } 681 682 if (list_empty(head)) { 683 os->last_sample = NULL; 684 } else if (last_ts <= limit) { 685 os->last_sample = 686 list_entry(head->prev, struct sample_queue, list); 687 } 688 689 os->nr_samples = 0; 690 } 691 692 /* 693 * When perf record finishes a pass on every buffers, it records this pseudo 694 * event. 695 * We record the max timestamp t found in the pass n. 696 * Assuming these timestamps are monotonic across cpus, we know that if 697 * a buffer still has events with timestamps below t, they will be all 698 * available and then read in the pass n + 1. 699 * Hence when we start to read the pass n + 2, we can safely flush every 700 * events with timestamps below t. 701 * 702 * ============ PASS n ================= 703 * CPU 0 | CPU 1 704 * | 705 * cnt1 timestamps | cnt2 timestamps 706 * 1 | 2 707 * 2 | 3 708 * - | 4 <--- max recorded 709 * 710 * ============ PASS n + 1 ============== 711 * CPU 0 | CPU 1 712 * | 713 * cnt1 timestamps | cnt2 timestamps 714 * 3 | 5 715 * 4 | 6 716 * 5 | 7 <---- max recorded 717 * 718 * Flush every events below timestamp 4 719 * 720 * ============ PASS n + 2 ============== 721 * CPU 0 | CPU 1 722 * | 723 * cnt1 timestamps | cnt2 timestamps 724 * 6 | 8 725 * 7 | 9 726 * - | 10 727 * 728 * Flush every events below timestamp 7 729 * etc... 730 */ 731 static int process_finished_round(struct perf_tool *tool, 732 union perf_event *event __used, 733 struct perf_session *session) 734 { 735 flush_sample_queue(session, tool); 736 session->ordered_samples.next_flush = session->ordered_samples.max_timestamp; 737 738 return 0; 739 } 740 741 /* The queue is ordered by time */ 742 static void __queue_event(struct sample_queue *new, struct perf_session *s) 743 { 744 struct ordered_samples *os = &s->ordered_samples; 745 struct sample_queue *sample = os->last_sample; 746 u64 timestamp = new->timestamp; 747 struct list_head *p; 748 749 ++os->nr_samples; 750 os->last_sample = new; 751 752 if (!sample) { 753 list_add(&new->list, &os->samples); 754 os->max_timestamp = timestamp; 755 return; 756 } 757 758 /* 759 * last_sample might point to some random place in the list as it's 760 * the last queued event. We expect that the new event is close to 761 * this. 762 */ 763 if (sample->timestamp <= timestamp) { 764 while (sample->timestamp <= timestamp) { 765 p = sample->list.next; 766 if (p == &os->samples) { 767 list_add_tail(&new->list, &os->samples); 768 os->max_timestamp = timestamp; 769 return; 770 } 771 sample = list_entry(p, struct sample_queue, list); 772 } 773 list_add_tail(&new->list, &sample->list); 774 } else { 775 while (sample->timestamp > timestamp) { 776 p = sample->list.prev; 777 if (p == &os->samples) { 778 list_add(&new->list, &os->samples); 779 return; 780 } 781 sample = list_entry(p, struct sample_queue, list); 782 } 783 list_add(&new->list, &sample->list); 784 } 785 } 786 787 #define MAX_SAMPLE_BUFFER (64 * 1024 / sizeof(struct sample_queue)) 788 789 static int perf_session_queue_event(struct perf_session *s, union perf_event *event, 790 struct perf_sample *sample, u64 file_offset) 791 { 792 struct ordered_samples *os = &s->ordered_samples; 793 struct list_head *sc = &os->sample_cache; 794 u64 timestamp = sample->time; 795 struct sample_queue *new; 796 797 if (!timestamp || timestamp == ~0ULL) 798 return -ETIME; 799 800 if (timestamp < s->ordered_samples.last_flush) { 801 printf("Warning: Timestamp below last timeslice flush\n"); 802 return -EINVAL; 803 } 804 805 if (!list_empty(sc)) { 806 new = list_entry(sc->next, struct sample_queue, list); 807 list_del(&new->list); 808 } else if (os->sample_buffer) { 809 new = os->sample_buffer + os->sample_buffer_idx; 810 if (++os->sample_buffer_idx == MAX_SAMPLE_BUFFER) 811 os->sample_buffer = NULL; 812 } else { 813 os->sample_buffer = malloc(MAX_SAMPLE_BUFFER * sizeof(*new)); 814 if (!os->sample_buffer) 815 return -ENOMEM; 816 list_add(&os->sample_buffer->list, &os->to_free); 817 os->sample_buffer_idx = 2; 818 new = os->sample_buffer + 1; 819 } 820 821 new->timestamp = timestamp; 822 new->file_offset = file_offset; 823 new->event = event; 824 825 __queue_event(new, s); 826 827 return 0; 828 } 829 830 static void callchain__printf(struct perf_sample *sample) 831 { 832 unsigned int i; 833 834 printf("... chain: nr:%" PRIu64 "\n", sample->callchain->nr); 835 836 for (i = 0; i < sample->callchain->nr; i++) 837 printf("..... %2d: %016" PRIx64 "\n", 838 i, sample->callchain->ips[i]); 839 } 840 841 static void branch_stack__printf(struct perf_sample *sample) 842 { 843 uint64_t i; 844 845 printf("... branch stack: nr:%" PRIu64 "\n", sample->branch_stack->nr); 846 847 for (i = 0; i < sample->branch_stack->nr; i++) 848 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 "\n", 849 i, sample->branch_stack->entries[i].from, 850 sample->branch_stack->entries[i].to); 851 } 852 853 static void perf_session__print_tstamp(struct perf_session *session, 854 union perf_event *event, 855 struct perf_sample *sample) 856 { 857 if (event->header.type != PERF_RECORD_SAMPLE && 858 !session->sample_id_all) { 859 fputs("-1 -1 ", stdout); 860 return; 861 } 862 863 if ((session->sample_type & PERF_SAMPLE_CPU)) 864 printf("%u ", sample->cpu); 865 866 if (session->sample_type & PERF_SAMPLE_TIME) 867 printf("%" PRIu64 " ", sample->time); 868 } 869 870 static void dump_event(struct perf_session *session, union perf_event *event, 871 u64 file_offset, struct perf_sample *sample) 872 { 873 if (!dump_trace) 874 return; 875 876 printf("\n%#" PRIx64 " [%#x]: event: %d\n", 877 file_offset, event->header.size, event->header.type); 878 879 trace_event(event); 880 881 if (sample) 882 perf_session__print_tstamp(session, event, sample); 883 884 printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset, 885 event->header.size, perf_event__name(event->header.type)); 886 } 887 888 static void dump_sample(struct perf_session *session, union perf_event *event, 889 struct perf_sample *sample) 890 { 891 if (!dump_trace) 892 return; 893 894 printf("(IP, %d): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n", 895 event->header.misc, sample->pid, sample->tid, sample->ip, 896 sample->period, sample->addr); 897 898 if (session->sample_type & PERF_SAMPLE_CALLCHAIN) 899 callchain__printf(sample); 900 901 if (session->sample_type & PERF_SAMPLE_BRANCH_STACK) 902 branch_stack__printf(sample); 903 } 904 905 static struct machine * 906 perf_session__find_machine_for_cpumode(struct perf_session *session, 907 union perf_event *event) 908 { 909 const u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; 910 911 if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) { 912 u32 pid; 913 914 if (event->header.type == PERF_RECORD_MMAP) 915 pid = event->mmap.pid; 916 else 917 pid = event->ip.pid; 918 919 return perf_session__find_machine(session, pid); 920 } 921 922 return perf_session__find_host_machine(session); 923 } 924 925 static int perf_session_deliver_event(struct perf_session *session, 926 union perf_event *event, 927 struct perf_sample *sample, 928 struct perf_tool *tool, 929 u64 file_offset) 930 { 931 struct perf_evsel *evsel; 932 struct machine *machine; 933 934 dump_event(session, event, file_offset, sample); 935 936 evsel = perf_evlist__id2evsel(session->evlist, sample->id); 937 if (evsel != NULL && event->header.type != PERF_RECORD_SAMPLE) { 938 /* 939 * XXX We're leaving PERF_RECORD_SAMPLE unnacounted here 940 * because the tools right now may apply filters, discarding 941 * some of the samples. For consistency, in the future we 942 * should have something like nr_filtered_samples and remove 943 * the sample->period from total_sample_period, etc, KISS for 944 * now tho. 945 * 946 * Also testing against NULL allows us to handle files without 947 * attr.sample_id_all and/or without PERF_SAMPLE_ID. In the 948 * future probably it'll be a good idea to restrict event 949 * processing via perf_session to files with both set. 950 */ 951 hists__inc_nr_events(&evsel->hists, event->header.type); 952 } 953 954 machine = perf_session__find_machine_for_cpumode(session, event); 955 956 switch (event->header.type) { 957 case PERF_RECORD_SAMPLE: 958 dump_sample(session, event, sample); 959 if (evsel == NULL) { 960 ++session->hists.stats.nr_unknown_id; 961 return 0; 962 } 963 if (machine == NULL) { 964 ++session->hists.stats.nr_unprocessable_samples; 965 return 0; 966 } 967 return tool->sample(tool, event, sample, evsel, machine); 968 case PERF_RECORD_MMAP: 969 return tool->mmap(tool, event, sample, machine); 970 case PERF_RECORD_COMM: 971 return tool->comm(tool, event, sample, machine); 972 case PERF_RECORD_FORK: 973 return tool->fork(tool, event, sample, machine); 974 case PERF_RECORD_EXIT: 975 return tool->exit(tool, event, sample, machine); 976 case PERF_RECORD_LOST: 977 if (tool->lost == perf_event__process_lost) 978 session->hists.stats.total_lost += event->lost.lost; 979 return tool->lost(tool, event, sample, machine); 980 case PERF_RECORD_READ: 981 return tool->read(tool, event, sample, evsel, machine); 982 case PERF_RECORD_THROTTLE: 983 return tool->throttle(tool, event, sample, machine); 984 case PERF_RECORD_UNTHROTTLE: 985 return tool->unthrottle(tool, event, sample, machine); 986 default: 987 ++session->hists.stats.nr_unknown_events; 988 return -1; 989 } 990 } 991 992 static int perf_session__preprocess_sample(struct perf_session *session, 993 union perf_event *event, struct perf_sample *sample) 994 { 995 if (event->header.type != PERF_RECORD_SAMPLE || 996 !(session->sample_type & PERF_SAMPLE_CALLCHAIN)) 997 return 0; 998 999 if (!ip_callchain__valid(sample->callchain, event)) { 1000 pr_debug("call-chain problem with event, skipping it.\n"); 1001 ++session->hists.stats.nr_invalid_chains; 1002 session->hists.stats.total_invalid_chains += sample->period; 1003 return -EINVAL; 1004 } 1005 return 0; 1006 } 1007 1008 static int perf_session__process_user_event(struct perf_session *session, union perf_event *event, 1009 struct perf_tool *tool, u64 file_offset) 1010 { 1011 int err; 1012 1013 dump_event(session, event, file_offset, NULL); 1014 1015 /* These events are processed right away */ 1016 switch (event->header.type) { 1017 case PERF_RECORD_HEADER_ATTR: 1018 err = tool->attr(event, &session->evlist); 1019 if (err == 0) 1020 perf_session__update_sample_type(session); 1021 return err; 1022 case PERF_RECORD_HEADER_EVENT_TYPE: 1023 return tool->event_type(tool, event); 1024 case PERF_RECORD_HEADER_TRACING_DATA: 1025 /* setup for reading amidst mmap */ 1026 lseek(session->fd, file_offset, SEEK_SET); 1027 return tool->tracing_data(event, session); 1028 case PERF_RECORD_HEADER_BUILD_ID: 1029 return tool->build_id(tool, event, session); 1030 case PERF_RECORD_FINISHED_ROUND: 1031 return tool->finished_round(tool, event, session); 1032 default: 1033 return -EINVAL; 1034 } 1035 } 1036 1037 static void event_swap(union perf_event *event, bool sample_id_all) 1038 { 1039 perf_event__swap_op swap; 1040 1041 swap = perf_event__swap_ops[event->header.type]; 1042 if (swap) 1043 swap(event, sample_id_all); 1044 } 1045 1046 static int perf_session__process_event(struct perf_session *session, 1047 union perf_event *event, 1048 struct perf_tool *tool, 1049 u64 file_offset) 1050 { 1051 struct perf_sample sample; 1052 int ret; 1053 1054 if (session->header.needs_swap) 1055 event_swap(event, session->sample_id_all); 1056 1057 if (event->header.type >= PERF_RECORD_HEADER_MAX) 1058 return -EINVAL; 1059 1060 hists__inc_nr_events(&session->hists, event->header.type); 1061 1062 if (event->header.type >= PERF_RECORD_USER_TYPE_START) 1063 return perf_session__process_user_event(session, event, tool, file_offset); 1064 1065 /* 1066 * For all kernel events we get the sample data 1067 */ 1068 ret = perf_session__parse_sample(session, event, &sample); 1069 if (ret) 1070 return ret; 1071 1072 /* Preprocess sample records - precheck callchains */ 1073 if (perf_session__preprocess_sample(session, event, &sample)) 1074 return 0; 1075 1076 if (tool->ordered_samples) { 1077 ret = perf_session_queue_event(session, event, &sample, 1078 file_offset); 1079 if (ret != -ETIME) 1080 return ret; 1081 } 1082 1083 return perf_session_deliver_event(session, event, &sample, tool, 1084 file_offset); 1085 } 1086 1087 void perf_event_header__bswap(struct perf_event_header *self) 1088 { 1089 self->type = bswap_32(self->type); 1090 self->misc = bswap_16(self->misc); 1091 self->size = bswap_16(self->size); 1092 } 1093 1094 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid) 1095 { 1096 return machine__findnew_thread(&session->host_machine, pid); 1097 } 1098 1099 static struct thread *perf_session__register_idle_thread(struct perf_session *self) 1100 { 1101 struct thread *thread = perf_session__findnew(self, 0); 1102 1103 if (thread == NULL || thread__set_comm(thread, "swapper")) { 1104 pr_err("problem inserting idle task.\n"); 1105 thread = NULL; 1106 } 1107 1108 return thread; 1109 } 1110 1111 static void perf_session__warn_about_errors(const struct perf_session *session, 1112 const struct perf_tool *tool) 1113 { 1114 if (tool->lost == perf_event__process_lost && 1115 session->hists.stats.nr_events[PERF_RECORD_LOST] != 0) { 1116 ui__warning("Processed %d events and lost %d chunks!\n\n" 1117 "Check IO/CPU overload!\n\n", 1118 session->hists.stats.nr_events[0], 1119 session->hists.stats.nr_events[PERF_RECORD_LOST]); 1120 } 1121 1122 if (session->hists.stats.nr_unknown_events != 0) { 1123 ui__warning("Found %u unknown events!\n\n" 1124 "Is this an older tool processing a perf.data " 1125 "file generated by a more recent tool?\n\n" 1126 "If that is not the case, consider " 1127 "reporting to linux-kernel@vger.kernel.org.\n\n", 1128 session->hists.stats.nr_unknown_events); 1129 } 1130 1131 if (session->hists.stats.nr_unknown_id != 0) { 1132 ui__warning("%u samples with id not present in the header\n", 1133 session->hists.stats.nr_unknown_id); 1134 } 1135 1136 if (session->hists.stats.nr_invalid_chains != 0) { 1137 ui__warning("Found invalid callchains!\n\n" 1138 "%u out of %u events were discarded for this reason.\n\n" 1139 "Consider reporting to linux-kernel@vger.kernel.org.\n\n", 1140 session->hists.stats.nr_invalid_chains, 1141 session->hists.stats.nr_events[PERF_RECORD_SAMPLE]); 1142 } 1143 1144 if (session->hists.stats.nr_unprocessable_samples != 0) { 1145 ui__warning("%u unprocessable samples recorded.\n" 1146 "Do you have a KVM guest running and not using 'perf kvm'?\n", 1147 session->hists.stats.nr_unprocessable_samples); 1148 } 1149 } 1150 1151 #define session_done() (*(volatile int *)(&session_done)) 1152 volatile int session_done; 1153 1154 static int __perf_session__process_pipe_events(struct perf_session *self, 1155 struct perf_tool *tool) 1156 { 1157 union perf_event *event; 1158 uint32_t size, cur_size = 0; 1159 void *buf = NULL; 1160 int skip = 0; 1161 u64 head; 1162 int err; 1163 void *p; 1164 1165 perf_tool__fill_defaults(tool); 1166 1167 head = 0; 1168 cur_size = sizeof(union perf_event); 1169 1170 buf = malloc(cur_size); 1171 if (!buf) 1172 return -errno; 1173 more: 1174 event = buf; 1175 err = readn(self->fd, event, sizeof(struct perf_event_header)); 1176 if (err <= 0) { 1177 if (err == 0) 1178 goto done; 1179 1180 pr_err("failed to read event header\n"); 1181 goto out_err; 1182 } 1183 1184 if (self->header.needs_swap) 1185 perf_event_header__bswap(&event->header); 1186 1187 size = event->header.size; 1188 if (size == 0) 1189 size = 8; 1190 1191 if (size > cur_size) { 1192 void *new = realloc(buf, size); 1193 if (!new) { 1194 pr_err("failed to allocate memory to read event\n"); 1195 goto out_err; 1196 } 1197 buf = new; 1198 cur_size = size; 1199 event = buf; 1200 } 1201 p = event; 1202 p += sizeof(struct perf_event_header); 1203 1204 if (size - sizeof(struct perf_event_header)) { 1205 err = readn(self->fd, p, size - sizeof(struct perf_event_header)); 1206 if (err <= 0) { 1207 if (err == 0) { 1208 pr_err("unexpected end of event stream\n"); 1209 goto done; 1210 } 1211 1212 pr_err("failed to read event data\n"); 1213 goto out_err; 1214 } 1215 } 1216 1217 if ((skip = perf_session__process_event(self, event, tool, head)) < 0) { 1218 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 1219 head, event->header.size, event->header.type); 1220 err = -EINVAL; 1221 goto out_err; 1222 } 1223 1224 head += size; 1225 1226 if (skip > 0) 1227 head += skip; 1228 1229 if (!session_done()) 1230 goto more; 1231 done: 1232 err = 0; 1233 out_err: 1234 free(buf); 1235 perf_session__warn_about_errors(self, tool); 1236 perf_session_free_sample_buffers(self); 1237 return err; 1238 } 1239 1240 static union perf_event * 1241 fetch_mmaped_event(struct perf_session *session, 1242 u64 head, size_t mmap_size, char *buf) 1243 { 1244 union perf_event *event; 1245 1246 /* 1247 * Ensure we have enough space remaining to read 1248 * the size of the event in the headers. 1249 */ 1250 if (head + sizeof(event->header) > mmap_size) 1251 return NULL; 1252 1253 event = (union perf_event *)(buf + head); 1254 1255 if (session->header.needs_swap) 1256 perf_event_header__bswap(&event->header); 1257 1258 if (head + event->header.size > mmap_size) 1259 return NULL; 1260 1261 return event; 1262 } 1263 1264 int __perf_session__process_events(struct perf_session *session, 1265 u64 data_offset, u64 data_size, 1266 u64 file_size, struct perf_tool *tool) 1267 { 1268 u64 head, page_offset, file_offset, file_pos, progress_next; 1269 int err, mmap_prot, mmap_flags, map_idx = 0; 1270 size_t page_size, mmap_size; 1271 char *buf, *mmaps[8]; 1272 union perf_event *event; 1273 uint32_t size; 1274 1275 perf_tool__fill_defaults(tool); 1276 1277 page_size = sysconf(_SC_PAGESIZE); 1278 1279 page_offset = page_size * (data_offset / page_size); 1280 file_offset = page_offset; 1281 head = data_offset - page_offset; 1282 1283 if (data_offset + data_size < file_size) 1284 file_size = data_offset + data_size; 1285 1286 progress_next = file_size / 16; 1287 1288 mmap_size = session->mmap_window; 1289 if (mmap_size > file_size) 1290 mmap_size = file_size; 1291 1292 memset(mmaps, 0, sizeof(mmaps)); 1293 1294 mmap_prot = PROT_READ; 1295 mmap_flags = MAP_SHARED; 1296 1297 if (session->header.needs_swap) { 1298 mmap_prot |= PROT_WRITE; 1299 mmap_flags = MAP_PRIVATE; 1300 } 1301 remap: 1302 buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, session->fd, 1303 file_offset); 1304 if (buf == MAP_FAILED) { 1305 pr_err("failed to mmap file\n"); 1306 err = -errno; 1307 goto out_err; 1308 } 1309 mmaps[map_idx] = buf; 1310 map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1); 1311 file_pos = file_offset + head; 1312 1313 more: 1314 event = fetch_mmaped_event(session, head, mmap_size, buf); 1315 if (!event) { 1316 if (mmaps[map_idx]) { 1317 munmap(mmaps[map_idx], mmap_size); 1318 mmaps[map_idx] = NULL; 1319 } 1320 1321 page_offset = page_size * (head / page_size); 1322 file_offset += page_offset; 1323 head -= page_offset; 1324 goto remap; 1325 } 1326 1327 size = event->header.size; 1328 1329 if (size == 0 || 1330 perf_session__process_event(session, event, tool, file_pos) < 0) { 1331 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 1332 file_offset + head, event->header.size, 1333 event->header.type); 1334 err = -EINVAL; 1335 goto out_err; 1336 } 1337 1338 head += size; 1339 file_pos += size; 1340 1341 if (file_pos >= progress_next) { 1342 progress_next += file_size / 16; 1343 ui_progress__update(file_pos, file_size, 1344 "Processing events..."); 1345 } 1346 1347 if (file_pos < file_size) 1348 goto more; 1349 1350 err = 0; 1351 /* do the final flush for ordered samples */ 1352 session->ordered_samples.next_flush = ULLONG_MAX; 1353 flush_sample_queue(session, tool); 1354 out_err: 1355 perf_session__warn_about_errors(session, tool); 1356 perf_session_free_sample_buffers(session); 1357 return err; 1358 } 1359 1360 int perf_session__process_events(struct perf_session *self, 1361 struct perf_tool *tool) 1362 { 1363 int err; 1364 1365 if (perf_session__register_idle_thread(self) == NULL) 1366 return -ENOMEM; 1367 1368 if (!self->fd_pipe) 1369 err = __perf_session__process_events(self, 1370 self->header.data_offset, 1371 self->header.data_size, 1372 self->size, tool); 1373 else 1374 err = __perf_session__process_pipe_events(self, tool); 1375 1376 return err; 1377 } 1378 1379 bool perf_session__has_traces(struct perf_session *self, const char *msg) 1380 { 1381 if (!(self->sample_type & PERF_SAMPLE_RAW)) { 1382 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg); 1383 return false; 1384 } 1385 1386 return true; 1387 } 1388 1389 int maps__set_kallsyms_ref_reloc_sym(struct map **maps, 1390 const char *symbol_name, u64 addr) 1391 { 1392 char *bracket; 1393 enum map_type i; 1394 struct ref_reloc_sym *ref; 1395 1396 ref = zalloc(sizeof(struct ref_reloc_sym)); 1397 if (ref == NULL) 1398 return -ENOMEM; 1399 1400 ref->name = strdup(symbol_name); 1401 if (ref->name == NULL) { 1402 free(ref); 1403 return -ENOMEM; 1404 } 1405 1406 bracket = strchr(ref->name, ']'); 1407 if (bracket) 1408 *bracket = '\0'; 1409 1410 ref->addr = addr; 1411 1412 for (i = 0; i < MAP__NR_TYPES; ++i) { 1413 struct kmap *kmap = map__kmap(maps[i]); 1414 kmap->ref_reloc_sym = ref; 1415 } 1416 1417 return 0; 1418 } 1419 1420 size_t perf_session__fprintf_dsos(struct perf_session *self, FILE *fp) 1421 { 1422 return __dsos__fprintf(&self->host_machine.kernel_dsos, fp) + 1423 __dsos__fprintf(&self->host_machine.user_dsos, fp) + 1424 machines__fprintf_dsos(&self->machines, fp); 1425 } 1426 1427 size_t perf_session__fprintf_dsos_buildid(struct perf_session *self, FILE *fp, 1428 bool with_hits) 1429 { 1430 size_t ret = machine__fprintf_dsos_buildid(&self->host_machine, fp, with_hits); 1431 return ret + machines__fprintf_dsos_buildid(&self->machines, fp, with_hits); 1432 } 1433 1434 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp) 1435 { 1436 struct perf_evsel *pos; 1437 size_t ret = fprintf(fp, "Aggregated stats:\n"); 1438 1439 ret += hists__fprintf_nr_events(&session->hists, fp); 1440 1441 list_for_each_entry(pos, &session->evlist->entries, node) { 1442 ret += fprintf(fp, "%s stats:\n", perf_evsel__name(pos)); 1443 ret += hists__fprintf_nr_events(&pos->hists, fp); 1444 } 1445 1446 return ret; 1447 } 1448 1449 size_t perf_session__fprintf(struct perf_session *session, FILE *fp) 1450 { 1451 /* 1452 * FIXME: Here we have to actually print all the machines in this 1453 * session, not just the host... 1454 */ 1455 return machine__fprintf(&session->host_machine, fp); 1456 } 1457 1458 void perf_session__remove_thread(struct perf_session *session, 1459 struct thread *th) 1460 { 1461 /* 1462 * FIXME: This one makes no sense, we need to remove the thread from 1463 * the machine it belongs to, perf_session can have many machines, so 1464 * doing it always on ->host_machine is wrong. Fix when auditing all 1465 * the 'perf kvm' code. 1466 */ 1467 machine__remove_thread(&session->host_machine, th); 1468 } 1469 1470 struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session, 1471 unsigned int type) 1472 { 1473 struct perf_evsel *pos; 1474 1475 list_for_each_entry(pos, &session->evlist->entries, node) { 1476 if (pos->attr.type == type) 1477 return pos; 1478 } 1479 return NULL; 1480 } 1481 1482 void perf_event__print_ip(union perf_event *event, struct perf_sample *sample, 1483 struct machine *machine, struct perf_evsel *evsel, 1484 int print_sym, int print_dso, int print_symoffset) 1485 { 1486 struct addr_location al; 1487 struct callchain_cursor_node *node; 1488 1489 if (perf_event__preprocess_sample(event, machine, &al, sample, 1490 NULL) < 0) { 1491 error("problem processing %d event, skipping it.\n", 1492 event->header.type); 1493 return; 1494 } 1495 1496 if (symbol_conf.use_callchain && sample->callchain) { 1497 1498 if (machine__resolve_callchain(machine, evsel, al.thread, 1499 sample->callchain, NULL) != 0) { 1500 if (verbose) 1501 error("Failed to resolve callchain. Skipping\n"); 1502 return; 1503 } 1504 callchain_cursor_commit(&callchain_cursor); 1505 1506 while (1) { 1507 node = callchain_cursor_current(&callchain_cursor); 1508 if (!node) 1509 break; 1510 1511 printf("\t%16" PRIx64, node->ip); 1512 if (print_sym) { 1513 printf(" "); 1514 symbol__fprintf_symname(node->sym, stdout); 1515 } 1516 if (print_dso) { 1517 printf(" ("); 1518 map__fprintf_dsoname(node->map, stdout); 1519 printf(")"); 1520 } 1521 printf("\n"); 1522 1523 callchain_cursor_advance(&callchain_cursor); 1524 } 1525 1526 } else { 1527 printf("%16" PRIx64, sample->ip); 1528 if (print_sym) { 1529 printf(" "); 1530 if (print_symoffset) 1531 symbol__fprintf_symname_offs(al.sym, &al, 1532 stdout); 1533 else 1534 symbol__fprintf_symname(al.sym, stdout); 1535 } 1536 1537 if (print_dso) { 1538 printf(" ("); 1539 map__fprintf_dsoname(al.map, stdout); 1540 printf(")"); 1541 } 1542 } 1543 } 1544 1545 int perf_session__cpu_bitmap(struct perf_session *session, 1546 const char *cpu_list, unsigned long *cpu_bitmap) 1547 { 1548 int i; 1549 struct cpu_map *map; 1550 1551 for (i = 0; i < PERF_TYPE_MAX; ++i) { 1552 struct perf_evsel *evsel; 1553 1554 evsel = perf_session__find_first_evtype(session, i); 1555 if (!evsel) 1556 continue; 1557 1558 if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) { 1559 pr_err("File does not contain CPU events. " 1560 "Remove -c option to proceed.\n"); 1561 return -1; 1562 } 1563 } 1564 1565 map = cpu_map__new(cpu_list); 1566 if (map == NULL) { 1567 pr_err("Invalid cpu_list\n"); 1568 return -1; 1569 } 1570 1571 for (i = 0; i < map->nr; i++) { 1572 int cpu = map->map[i]; 1573 1574 if (cpu >= MAX_NR_CPUS) { 1575 pr_err("Requested CPU %d too large. " 1576 "Consider raising MAX_NR_CPUS\n", cpu); 1577 return -1; 1578 } 1579 1580 set_bit(cpu, cpu_bitmap); 1581 } 1582 1583 return 0; 1584 } 1585 1586 void perf_session__fprintf_info(struct perf_session *session, FILE *fp, 1587 bool full) 1588 { 1589 struct stat st; 1590 int ret; 1591 1592 if (session == NULL || fp == NULL) 1593 return; 1594 1595 ret = fstat(session->fd, &st); 1596 if (ret == -1) 1597 return; 1598 1599 fprintf(fp, "# ========\n"); 1600 fprintf(fp, "# captured on: %s", ctime(&st.st_ctime)); 1601 perf_header__fprintf_info(session, fp, full); 1602 fprintf(fp, "# ========\n#\n"); 1603 } 1604