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_32(void *src, int byte_size) 447 { 448 u32 *m = src; 449 while (byte_size > 0) { 450 *m = bswap_32(*m); 451 byte_size -= sizeof(u32); 452 ++m; 453 } 454 } 455 456 void mem_bswap_64(void *src, int byte_size) 457 { 458 u64 *m = src; 459 460 while (byte_size > 0) { 461 *m = bswap_64(*m); 462 byte_size -= sizeof(u64); 463 ++m; 464 } 465 } 466 467 static void swap_sample_id_all(union perf_event *event, void *data) 468 { 469 void *end = (void *) event + event->header.size; 470 int size = end - data; 471 472 BUG_ON(size % sizeof(u64)); 473 mem_bswap_64(data, size); 474 } 475 476 static void perf_event__all64_swap(union perf_event *event, 477 bool sample_id_all __used) 478 { 479 struct perf_event_header *hdr = &event->header; 480 mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr)); 481 } 482 483 static void perf_event__comm_swap(union perf_event *event, bool sample_id_all) 484 { 485 event->comm.pid = bswap_32(event->comm.pid); 486 event->comm.tid = bswap_32(event->comm.tid); 487 488 if (sample_id_all) { 489 void *data = &event->comm.comm; 490 491 data += ALIGN(strlen(data) + 1, sizeof(u64)); 492 swap_sample_id_all(event, data); 493 } 494 } 495 496 static void perf_event__mmap_swap(union perf_event *event, 497 bool sample_id_all) 498 { 499 event->mmap.pid = bswap_32(event->mmap.pid); 500 event->mmap.tid = bswap_32(event->mmap.tid); 501 event->mmap.start = bswap_64(event->mmap.start); 502 event->mmap.len = bswap_64(event->mmap.len); 503 event->mmap.pgoff = bswap_64(event->mmap.pgoff); 504 505 if (sample_id_all) { 506 void *data = &event->mmap.filename; 507 508 data += ALIGN(strlen(data) + 1, sizeof(u64)); 509 swap_sample_id_all(event, data); 510 } 511 } 512 513 static void perf_event__task_swap(union perf_event *event, bool sample_id_all) 514 { 515 event->fork.pid = bswap_32(event->fork.pid); 516 event->fork.tid = bswap_32(event->fork.tid); 517 event->fork.ppid = bswap_32(event->fork.ppid); 518 event->fork.ptid = bswap_32(event->fork.ptid); 519 event->fork.time = bswap_64(event->fork.time); 520 521 if (sample_id_all) 522 swap_sample_id_all(event, &event->fork + 1); 523 } 524 525 static void perf_event__read_swap(union perf_event *event, bool sample_id_all) 526 { 527 event->read.pid = bswap_32(event->read.pid); 528 event->read.tid = bswap_32(event->read.tid); 529 event->read.value = bswap_64(event->read.value); 530 event->read.time_enabled = bswap_64(event->read.time_enabled); 531 event->read.time_running = bswap_64(event->read.time_running); 532 event->read.id = bswap_64(event->read.id); 533 534 if (sample_id_all) 535 swap_sample_id_all(event, &event->read + 1); 536 } 537 538 static u8 revbyte(u8 b) 539 { 540 int rev = (b >> 4) | ((b & 0xf) << 4); 541 rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2); 542 rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1); 543 return (u8) rev; 544 } 545 546 /* 547 * XXX this is hack in attempt to carry flags bitfield 548 * throught endian village. ABI says: 549 * 550 * Bit-fields are allocated from right to left (least to most significant) 551 * on little-endian implementations and from left to right (most to least 552 * significant) on big-endian implementations. 553 * 554 * The above seems to be byte specific, so we need to reverse each 555 * byte of the bitfield. 'Internet' also says this might be implementation 556 * specific and we probably need proper fix and carry perf_event_attr 557 * bitfield flags in separate data file FEAT_ section. Thought this seems 558 * to work for now. 559 */ 560 static void swap_bitfield(u8 *p, unsigned len) 561 { 562 unsigned i; 563 564 for (i = 0; i < len; i++) { 565 *p = revbyte(*p); 566 p++; 567 } 568 } 569 570 /* exported for swapping attributes in file header */ 571 void perf_event__attr_swap(struct perf_event_attr *attr) 572 { 573 attr->type = bswap_32(attr->type); 574 attr->size = bswap_32(attr->size); 575 attr->config = bswap_64(attr->config); 576 attr->sample_period = bswap_64(attr->sample_period); 577 attr->sample_type = bswap_64(attr->sample_type); 578 attr->read_format = bswap_64(attr->read_format); 579 attr->wakeup_events = bswap_32(attr->wakeup_events); 580 attr->bp_type = bswap_32(attr->bp_type); 581 attr->bp_addr = bswap_64(attr->bp_addr); 582 attr->bp_len = bswap_64(attr->bp_len); 583 584 swap_bitfield((u8 *) (&attr->read_format + 1), sizeof(u64)); 585 } 586 587 static void perf_event__hdr_attr_swap(union perf_event *event, 588 bool sample_id_all __used) 589 { 590 size_t size; 591 592 perf_event__attr_swap(&event->attr.attr); 593 594 size = event->header.size; 595 size -= (void *)&event->attr.id - (void *)event; 596 mem_bswap_64(event->attr.id, size); 597 } 598 599 static void perf_event__event_type_swap(union perf_event *event, 600 bool sample_id_all __used) 601 { 602 event->event_type.event_type.event_id = 603 bswap_64(event->event_type.event_type.event_id); 604 } 605 606 static void perf_event__tracing_data_swap(union perf_event *event, 607 bool sample_id_all __used) 608 { 609 event->tracing_data.size = bswap_32(event->tracing_data.size); 610 } 611 612 typedef void (*perf_event__swap_op)(union perf_event *event, 613 bool sample_id_all); 614 615 static perf_event__swap_op perf_event__swap_ops[] = { 616 [PERF_RECORD_MMAP] = perf_event__mmap_swap, 617 [PERF_RECORD_COMM] = perf_event__comm_swap, 618 [PERF_RECORD_FORK] = perf_event__task_swap, 619 [PERF_RECORD_EXIT] = perf_event__task_swap, 620 [PERF_RECORD_LOST] = perf_event__all64_swap, 621 [PERF_RECORD_READ] = perf_event__read_swap, 622 [PERF_RECORD_SAMPLE] = perf_event__all64_swap, 623 [PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap, 624 [PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap, 625 [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap, 626 [PERF_RECORD_HEADER_BUILD_ID] = NULL, 627 [PERF_RECORD_HEADER_MAX] = NULL, 628 }; 629 630 struct sample_queue { 631 u64 timestamp; 632 u64 file_offset; 633 union perf_event *event; 634 struct list_head list; 635 }; 636 637 static void perf_session_free_sample_buffers(struct perf_session *session) 638 { 639 struct ordered_samples *os = &session->ordered_samples; 640 641 while (!list_empty(&os->to_free)) { 642 struct sample_queue *sq; 643 644 sq = list_entry(os->to_free.next, struct sample_queue, list); 645 list_del(&sq->list); 646 free(sq); 647 } 648 } 649 650 static int perf_session_deliver_event(struct perf_session *session, 651 union perf_event *event, 652 struct perf_sample *sample, 653 struct perf_tool *tool, 654 u64 file_offset); 655 656 static void flush_sample_queue(struct perf_session *s, 657 struct perf_tool *tool) 658 { 659 struct ordered_samples *os = &s->ordered_samples; 660 struct list_head *head = &os->samples; 661 struct sample_queue *tmp, *iter; 662 struct perf_sample sample; 663 u64 limit = os->next_flush; 664 u64 last_ts = os->last_sample ? os->last_sample->timestamp : 0ULL; 665 unsigned idx = 0, progress_next = os->nr_samples / 16; 666 int ret; 667 668 if (!tool->ordered_samples || !limit) 669 return; 670 671 list_for_each_entry_safe(iter, tmp, head, list) { 672 if (iter->timestamp > limit) 673 break; 674 675 ret = perf_session__parse_sample(s, iter->event, &sample); 676 if (ret) 677 pr_err("Can't parse sample, err = %d\n", ret); 678 else 679 perf_session_deliver_event(s, iter->event, &sample, tool, 680 iter->file_offset); 681 682 os->last_flush = iter->timestamp; 683 list_del(&iter->list); 684 list_add(&iter->list, &os->sample_cache); 685 if (++idx >= progress_next) { 686 progress_next += os->nr_samples / 16; 687 ui_progress__update(idx, os->nr_samples, 688 "Processing time ordered events..."); 689 } 690 } 691 692 if (list_empty(head)) { 693 os->last_sample = NULL; 694 } else if (last_ts <= limit) { 695 os->last_sample = 696 list_entry(head->prev, struct sample_queue, list); 697 } 698 699 os->nr_samples = 0; 700 } 701 702 /* 703 * When perf record finishes a pass on every buffers, it records this pseudo 704 * event. 705 * We record the max timestamp t found in the pass n. 706 * Assuming these timestamps are monotonic across cpus, we know that if 707 * a buffer still has events with timestamps below t, they will be all 708 * available and then read in the pass n + 1. 709 * Hence when we start to read the pass n + 2, we can safely flush every 710 * events with timestamps below t. 711 * 712 * ============ PASS n ================= 713 * CPU 0 | CPU 1 714 * | 715 * cnt1 timestamps | cnt2 timestamps 716 * 1 | 2 717 * 2 | 3 718 * - | 4 <--- max recorded 719 * 720 * ============ PASS n + 1 ============== 721 * CPU 0 | CPU 1 722 * | 723 * cnt1 timestamps | cnt2 timestamps 724 * 3 | 5 725 * 4 | 6 726 * 5 | 7 <---- max recorded 727 * 728 * Flush every events below timestamp 4 729 * 730 * ============ PASS n + 2 ============== 731 * CPU 0 | CPU 1 732 * | 733 * cnt1 timestamps | cnt2 timestamps 734 * 6 | 8 735 * 7 | 9 736 * - | 10 737 * 738 * Flush every events below timestamp 7 739 * etc... 740 */ 741 static int process_finished_round(struct perf_tool *tool, 742 union perf_event *event __used, 743 struct perf_session *session) 744 { 745 flush_sample_queue(session, tool); 746 session->ordered_samples.next_flush = session->ordered_samples.max_timestamp; 747 748 return 0; 749 } 750 751 /* The queue is ordered by time */ 752 static void __queue_event(struct sample_queue *new, struct perf_session *s) 753 { 754 struct ordered_samples *os = &s->ordered_samples; 755 struct sample_queue *sample = os->last_sample; 756 u64 timestamp = new->timestamp; 757 struct list_head *p; 758 759 ++os->nr_samples; 760 os->last_sample = new; 761 762 if (!sample) { 763 list_add(&new->list, &os->samples); 764 os->max_timestamp = timestamp; 765 return; 766 } 767 768 /* 769 * last_sample might point to some random place in the list as it's 770 * the last queued event. We expect that the new event is close to 771 * this. 772 */ 773 if (sample->timestamp <= timestamp) { 774 while (sample->timestamp <= timestamp) { 775 p = sample->list.next; 776 if (p == &os->samples) { 777 list_add_tail(&new->list, &os->samples); 778 os->max_timestamp = timestamp; 779 return; 780 } 781 sample = list_entry(p, struct sample_queue, list); 782 } 783 list_add_tail(&new->list, &sample->list); 784 } else { 785 while (sample->timestamp > timestamp) { 786 p = sample->list.prev; 787 if (p == &os->samples) { 788 list_add(&new->list, &os->samples); 789 return; 790 } 791 sample = list_entry(p, struct sample_queue, list); 792 } 793 list_add(&new->list, &sample->list); 794 } 795 } 796 797 #define MAX_SAMPLE_BUFFER (64 * 1024 / sizeof(struct sample_queue)) 798 799 static int perf_session_queue_event(struct perf_session *s, union perf_event *event, 800 struct perf_sample *sample, u64 file_offset) 801 { 802 struct ordered_samples *os = &s->ordered_samples; 803 struct list_head *sc = &os->sample_cache; 804 u64 timestamp = sample->time; 805 struct sample_queue *new; 806 807 if (!timestamp || timestamp == ~0ULL) 808 return -ETIME; 809 810 if (timestamp < s->ordered_samples.last_flush) { 811 printf("Warning: Timestamp below last timeslice flush\n"); 812 return -EINVAL; 813 } 814 815 if (!list_empty(sc)) { 816 new = list_entry(sc->next, struct sample_queue, list); 817 list_del(&new->list); 818 } else if (os->sample_buffer) { 819 new = os->sample_buffer + os->sample_buffer_idx; 820 if (++os->sample_buffer_idx == MAX_SAMPLE_BUFFER) 821 os->sample_buffer = NULL; 822 } else { 823 os->sample_buffer = malloc(MAX_SAMPLE_BUFFER * sizeof(*new)); 824 if (!os->sample_buffer) 825 return -ENOMEM; 826 list_add(&os->sample_buffer->list, &os->to_free); 827 os->sample_buffer_idx = 2; 828 new = os->sample_buffer + 1; 829 } 830 831 new->timestamp = timestamp; 832 new->file_offset = file_offset; 833 new->event = event; 834 835 __queue_event(new, s); 836 837 return 0; 838 } 839 840 static void callchain__printf(struct perf_sample *sample) 841 { 842 unsigned int i; 843 844 printf("... chain: nr:%" PRIu64 "\n", sample->callchain->nr); 845 846 for (i = 0; i < sample->callchain->nr; i++) 847 printf("..... %2d: %016" PRIx64 "\n", 848 i, sample->callchain->ips[i]); 849 } 850 851 static void branch_stack__printf(struct perf_sample *sample) 852 { 853 uint64_t i; 854 855 printf("... branch stack: nr:%" PRIu64 "\n", sample->branch_stack->nr); 856 857 for (i = 0; i < sample->branch_stack->nr; i++) 858 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 "\n", 859 i, sample->branch_stack->entries[i].from, 860 sample->branch_stack->entries[i].to); 861 } 862 863 static void perf_session__print_tstamp(struct perf_session *session, 864 union perf_event *event, 865 struct perf_sample *sample) 866 { 867 if (event->header.type != PERF_RECORD_SAMPLE && 868 !session->sample_id_all) { 869 fputs("-1 -1 ", stdout); 870 return; 871 } 872 873 if ((session->sample_type & PERF_SAMPLE_CPU)) 874 printf("%u ", sample->cpu); 875 876 if (session->sample_type & PERF_SAMPLE_TIME) 877 printf("%" PRIu64 " ", sample->time); 878 } 879 880 static void dump_event(struct perf_session *session, union perf_event *event, 881 u64 file_offset, struct perf_sample *sample) 882 { 883 if (!dump_trace) 884 return; 885 886 printf("\n%#" PRIx64 " [%#x]: event: %d\n", 887 file_offset, event->header.size, event->header.type); 888 889 trace_event(event); 890 891 if (sample) 892 perf_session__print_tstamp(session, event, sample); 893 894 printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset, 895 event->header.size, perf_event__name(event->header.type)); 896 } 897 898 static void dump_sample(struct perf_session *session, union perf_event *event, 899 struct perf_sample *sample) 900 { 901 if (!dump_trace) 902 return; 903 904 printf("(IP, %d): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n", 905 event->header.misc, sample->pid, sample->tid, sample->ip, 906 sample->period, sample->addr); 907 908 if (session->sample_type & PERF_SAMPLE_CALLCHAIN) 909 callchain__printf(sample); 910 911 if (session->sample_type & PERF_SAMPLE_BRANCH_STACK) 912 branch_stack__printf(sample); 913 } 914 915 static struct machine * 916 perf_session__find_machine_for_cpumode(struct perf_session *session, 917 union perf_event *event) 918 { 919 const u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; 920 921 if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) { 922 u32 pid; 923 924 if (event->header.type == PERF_RECORD_MMAP) 925 pid = event->mmap.pid; 926 else 927 pid = event->ip.pid; 928 929 return perf_session__findnew_machine(session, pid); 930 } 931 932 return perf_session__find_host_machine(session); 933 } 934 935 static int perf_session_deliver_event(struct perf_session *session, 936 union perf_event *event, 937 struct perf_sample *sample, 938 struct perf_tool *tool, 939 u64 file_offset) 940 { 941 struct perf_evsel *evsel; 942 struct machine *machine; 943 944 dump_event(session, event, file_offset, sample); 945 946 evsel = perf_evlist__id2evsel(session->evlist, sample->id); 947 if (evsel != NULL && event->header.type != PERF_RECORD_SAMPLE) { 948 /* 949 * XXX We're leaving PERF_RECORD_SAMPLE unnacounted here 950 * because the tools right now may apply filters, discarding 951 * some of the samples. For consistency, in the future we 952 * should have something like nr_filtered_samples and remove 953 * the sample->period from total_sample_period, etc, KISS for 954 * now tho. 955 * 956 * Also testing against NULL allows us to handle files without 957 * attr.sample_id_all and/or without PERF_SAMPLE_ID. In the 958 * future probably it'll be a good idea to restrict event 959 * processing via perf_session to files with both set. 960 */ 961 hists__inc_nr_events(&evsel->hists, event->header.type); 962 } 963 964 machine = perf_session__find_machine_for_cpumode(session, event); 965 966 switch (event->header.type) { 967 case PERF_RECORD_SAMPLE: 968 dump_sample(session, event, sample); 969 if (evsel == NULL) { 970 ++session->hists.stats.nr_unknown_id; 971 return 0; 972 } 973 if (machine == NULL) { 974 ++session->hists.stats.nr_unprocessable_samples; 975 return 0; 976 } 977 return tool->sample(tool, event, sample, evsel, machine); 978 case PERF_RECORD_MMAP: 979 return tool->mmap(tool, event, sample, machine); 980 case PERF_RECORD_COMM: 981 return tool->comm(tool, event, sample, machine); 982 case PERF_RECORD_FORK: 983 return tool->fork(tool, event, sample, machine); 984 case PERF_RECORD_EXIT: 985 return tool->exit(tool, event, sample, machine); 986 case PERF_RECORD_LOST: 987 if (tool->lost == perf_event__process_lost) 988 session->hists.stats.total_lost += event->lost.lost; 989 return tool->lost(tool, event, sample, machine); 990 case PERF_RECORD_READ: 991 return tool->read(tool, event, sample, evsel, machine); 992 case PERF_RECORD_THROTTLE: 993 return tool->throttle(tool, event, sample, machine); 994 case PERF_RECORD_UNTHROTTLE: 995 return tool->unthrottle(tool, event, sample, machine); 996 default: 997 ++session->hists.stats.nr_unknown_events; 998 return -1; 999 } 1000 } 1001 1002 static int perf_session__preprocess_sample(struct perf_session *session, 1003 union perf_event *event, struct perf_sample *sample) 1004 { 1005 if (event->header.type != PERF_RECORD_SAMPLE || 1006 !(session->sample_type & PERF_SAMPLE_CALLCHAIN)) 1007 return 0; 1008 1009 if (!ip_callchain__valid(sample->callchain, event)) { 1010 pr_debug("call-chain problem with event, skipping it.\n"); 1011 ++session->hists.stats.nr_invalid_chains; 1012 session->hists.stats.total_invalid_chains += sample->period; 1013 return -EINVAL; 1014 } 1015 return 0; 1016 } 1017 1018 static int perf_session__process_user_event(struct perf_session *session, union perf_event *event, 1019 struct perf_tool *tool, u64 file_offset) 1020 { 1021 int err; 1022 1023 dump_event(session, event, file_offset, NULL); 1024 1025 /* These events are processed right away */ 1026 switch (event->header.type) { 1027 case PERF_RECORD_HEADER_ATTR: 1028 err = tool->attr(event, &session->evlist); 1029 if (err == 0) 1030 perf_session__update_sample_type(session); 1031 return err; 1032 case PERF_RECORD_HEADER_EVENT_TYPE: 1033 return tool->event_type(tool, event); 1034 case PERF_RECORD_HEADER_TRACING_DATA: 1035 /* setup for reading amidst mmap */ 1036 lseek(session->fd, file_offset, SEEK_SET); 1037 return tool->tracing_data(event, session); 1038 case PERF_RECORD_HEADER_BUILD_ID: 1039 return tool->build_id(tool, event, session); 1040 case PERF_RECORD_FINISHED_ROUND: 1041 return tool->finished_round(tool, event, session); 1042 default: 1043 return -EINVAL; 1044 } 1045 } 1046 1047 static void event_swap(union perf_event *event, bool sample_id_all) 1048 { 1049 perf_event__swap_op swap; 1050 1051 swap = perf_event__swap_ops[event->header.type]; 1052 if (swap) 1053 swap(event, sample_id_all); 1054 } 1055 1056 static int perf_session__process_event(struct perf_session *session, 1057 union perf_event *event, 1058 struct perf_tool *tool, 1059 u64 file_offset) 1060 { 1061 struct perf_sample sample; 1062 int ret; 1063 1064 if (session->header.needs_swap) 1065 event_swap(event, session->sample_id_all); 1066 1067 if (event->header.type >= PERF_RECORD_HEADER_MAX) 1068 return -EINVAL; 1069 1070 hists__inc_nr_events(&session->hists, event->header.type); 1071 1072 if (event->header.type >= PERF_RECORD_USER_TYPE_START) 1073 return perf_session__process_user_event(session, event, tool, file_offset); 1074 1075 /* 1076 * For all kernel events we get the sample data 1077 */ 1078 ret = perf_session__parse_sample(session, event, &sample); 1079 if (ret) 1080 return ret; 1081 1082 /* Preprocess sample records - precheck callchains */ 1083 if (perf_session__preprocess_sample(session, event, &sample)) 1084 return 0; 1085 1086 if (tool->ordered_samples) { 1087 ret = perf_session_queue_event(session, event, &sample, 1088 file_offset); 1089 if (ret != -ETIME) 1090 return ret; 1091 } 1092 1093 return perf_session_deliver_event(session, event, &sample, tool, 1094 file_offset); 1095 } 1096 1097 void perf_event_header__bswap(struct perf_event_header *self) 1098 { 1099 self->type = bswap_32(self->type); 1100 self->misc = bswap_16(self->misc); 1101 self->size = bswap_16(self->size); 1102 } 1103 1104 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid) 1105 { 1106 return machine__findnew_thread(&session->host_machine, pid); 1107 } 1108 1109 static struct thread *perf_session__register_idle_thread(struct perf_session *self) 1110 { 1111 struct thread *thread = perf_session__findnew(self, 0); 1112 1113 if (thread == NULL || thread__set_comm(thread, "swapper")) { 1114 pr_err("problem inserting idle task.\n"); 1115 thread = NULL; 1116 } 1117 1118 return thread; 1119 } 1120 1121 static void perf_session__warn_about_errors(const struct perf_session *session, 1122 const struct perf_tool *tool) 1123 { 1124 if (tool->lost == perf_event__process_lost && 1125 session->hists.stats.nr_events[PERF_RECORD_LOST] != 0) { 1126 ui__warning("Processed %d events and lost %d chunks!\n\n" 1127 "Check IO/CPU overload!\n\n", 1128 session->hists.stats.nr_events[0], 1129 session->hists.stats.nr_events[PERF_RECORD_LOST]); 1130 } 1131 1132 if (session->hists.stats.nr_unknown_events != 0) { 1133 ui__warning("Found %u unknown events!\n\n" 1134 "Is this an older tool processing a perf.data " 1135 "file generated by a more recent tool?\n\n" 1136 "If that is not the case, consider " 1137 "reporting to linux-kernel@vger.kernel.org.\n\n", 1138 session->hists.stats.nr_unknown_events); 1139 } 1140 1141 if (session->hists.stats.nr_unknown_id != 0) { 1142 ui__warning("%u samples with id not present in the header\n", 1143 session->hists.stats.nr_unknown_id); 1144 } 1145 1146 if (session->hists.stats.nr_invalid_chains != 0) { 1147 ui__warning("Found invalid callchains!\n\n" 1148 "%u out of %u events were discarded for this reason.\n\n" 1149 "Consider reporting to linux-kernel@vger.kernel.org.\n\n", 1150 session->hists.stats.nr_invalid_chains, 1151 session->hists.stats.nr_events[PERF_RECORD_SAMPLE]); 1152 } 1153 1154 if (session->hists.stats.nr_unprocessable_samples != 0) { 1155 ui__warning("%u unprocessable samples recorded.\n" 1156 "Do you have a KVM guest running and not using 'perf kvm'?\n", 1157 session->hists.stats.nr_unprocessable_samples); 1158 } 1159 } 1160 1161 #define session_done() (*(volatile int *)(&session_done)) 1162 volatile int session_done; 1163 1164 static int __perf_session__process_pipe_events(struct perf_session *self, 1165 struct perf_tool *tool) 1166 { 1167 union perf_event *event; 1168 uint32_t size, cur_size = 0; 1169 void *buf = NULL; 1170 int skip = 0; 1171 u64 head; 1172 int err; 1173 void *p; 1174 1175 perf_tool__fill_defaults(tool); 1176 1177 head = 0; 1178 cur_size = sizeof(union perf_event); 1179 1180 buf = malloc(cur_size); 1181 if (!buf) 1182 return -errno; 1183 more: 1184 event = buf; 1185 err = readn(self->fd, event, sizeof(struct perf_event_header)); 1186 if (err <= 0) { 1187 if (err == 0) 1188 goto done; 1189 1190 pr_err("failed to read event header\n"); 1191 goto out_err; 1192 } 1193 1194 if (self->header.needs_swap) 1195 perf_event_header__bswap(&event->header); 1196 1197 size = event->header.size; 1198 if (size == 0) 1199 size = 8; 1200 1201 if (size > cur_size) { 1202 void *new = realloc(buf, size); 1203 if (!new) { 1204 pr_err("failed to allocate memory to read event\n"); 1205 goto out_err; 1206 } 1207 buf = new; 1208 cur_size = size; 1209 event = buf; 1210 } 1211 p = event; 1212 p += sizeof(struct perf_event_header); 1213 1214 if (size - sizeof(struct perf_event_header)) { 1215 err = readn(self->fd, p, size - sizeof(struct perf_event_header)); 1216 if (err <= 0) { 1217 if (err == 0) { 1218 pr_err("unexpected end of event stream\n"); 1219 goto done; 1220 } 1221 1222 pr_err("failed to read event data\n"); 1223 goto out_err; 1224 } 1225 } 1226 1227 if ((skip = perf_session__process_event(self, event, tool, head)) < 0) { 1228 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 1229 head, event->header.size, event->header.type); 1230 err = -EINVAL; 1231 goto out_err; 1232 } 1233 1234 head += size; 1235 1236 if (skip > 0) 1237 head += skip; 1238 1239 if (!session_done()) 1240 goto more; 1241 done: 1242 err = 0; 1243 out_err: 1244 free(buf); 1245 perf_session__warn_about_errors(self, tool); 1246 perf_session_free_sample_buffers(self); 1247 return err; 1248 } 1249 1250 static union perf_event * 1251 fetch_mmaped_event(struct perf_session *session, 1252 u64 head, size_t mmap_size, char *buf) 1253 { 1254 union perf_event *event; 1255 1256 /* 1257 * Ensure we have enough space remaining to read 1258 * the size of the event in the headers. 1259 */ 1260 if (head + sizeof(event->header) > mmap_size) 1261 return NULL; 1262 1263 event = (union perf_event *)(buf + head); 1264 1265 if (session->header.needs_swap) 1266 perf_event_header__bswap(&event->header); 1267 1268 if (head + event->header.size > mmap_size) 1269 return NULL; 1270 1271 return event; 1272 } 1273 1274 int __perf_session__process_events(struct perf_session *session, 1275 u64 data_offset, u64 data_size, 1276 u64 file_size, struct perf_tool *tool) 1277 { 1278 u64 head, page_offset, file_offset, file_pos, progress_next; 1279 int err, mmap_prot, mmap_flags, map_idx = 0; 1280 size_t page_size, mmap_size; 1281 char *buf, *mmaps[8]; 1282 union perf_event *event; 1283 uint32_t size; 1284 1285 perf_tool__fill_defaults(tool); 1286 1287 page_size = sysconf(_SC_PAGESIZE); 1288 1289 page_offset = page_size * (data_offset / page_size); 1290 file_offset = page_offset; 1291 head = data_offset - page_offset; 1292 1293 if (data_offset + data_size < file_size) 1294 file_size = data_offset + data_size; 1295 1296 progress_next = file_size / 16; 1297 1298 mmap_size = session->mmap_window; 1299 if (mmap_size > file_size) 1300 mmap_size = file_size; 1301 1302 memset(mmaps, 0, sizeof(mmaps)); 1303 1304 mmap_prot = PROT_READ; 1305 mmap_flags = MAP_SHARED; 1306 1307 if (session->header.needs_swap) { 1308 mmap_prot |= PROT_WRITE; 1309 mmap_flags = MAP_PRIVATE; 1310 } 1311 remap: 1312 buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, session->fd, 1313 file_offset); 1314 if (buf == MAP_FAILED) { 1315 pr_err("failed to mmap file\n"); 1316 err = -errno; 1317 goto out_err; 1318 } 1319 mmaps[map_idx] = buf; 1320 map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1); 1321 file_pos = file_offset + head; 1322 1323 more: 1324 event = fetch_mmaped_event(session, head, mmap_size, buf); 1325 if (!event) { 1326 if (mmaps[map_idx]) { 1327 munmap(mmaps[map_idx], mmap_size); 1328 mmaps[map_idx] = NULL; 1329 } 1330 1331 page_offset = page_size * (head / page_size); 1332 file_offset += page_offset; 1333 head -= page_offset; 1334 goto remap; 1335 } 1336 1337 size = event->header.size; 1338 1339 if (size == 0 || 1340 perf_session__process_event(session, event, tool, file_pos) < 0) { 1341 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 1342 file_offset + head, event->header.size, 1343 event->header.type); 1344 err = -EINVAL; 1345 goto out_err; 1346 } 1347 1348 head += size; 1349 file_pos += size; 1350 1351 if (file_pos >= progress_next) { 1352 progress_next += file_size / 16; 1353 ui_progress__update(file_pos, file_size, 1354 "Processing events..."); 1355 } 1356 1357 if (file_pos < file_size) 1358 goto more; 1359 1360 err = 0; 1361 /* do the final flush for ordered samples */ 1362 session->ordered_samples.next_flush = ULLONG_MAX; 1363 flush_sample_queue(session, tool); 1364 out_err: 1365 perf_session__warn_about_errors(session, tool); 1366 perf_session_free_sample_buffers(session); 1367 return err; 1368 } 1369 1370 int perf_session__process_events(struct perf_session *self, 1371 struct perf_tool *tool) 1372 { 1373 int err; 1374 1375 if (perf_session__register_idle_thread(self) == NULL) 1376 return -ENOMEM; 1377 1378 if (!self->fd_pipe) 1379 err = __perf_session__process_events(self, 1380 self->header.data_offset, 1381 self->header.data_size, 1382 self->size, tool); 1383 else 1384 err = __perf_session__process_pipe_events(self, tool); 1385 1386 return err; 1387 } 1388 1389 bool perf_session__has_traces(struct perf_session *self, const char *msg) 1390 { 1391 if (!(self->sample_type & PERF_SAMPLE_RAW)) { 1392 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg); 1393 return false; 1394 } 1395 1396 return true; 1397 } 1398 1399 int maps__set_kallsyms_ref_reloc_sym(struct map **maps, 1400 const char *symbol_name, u64 addr) 1401 { 1402 char *bracket; 1403 enum map_type i; 1404 struct ref_reloc_sym *ref; 1405 1406 ref = zalloc(sizeof(struct ref_reloc_sym)); 1407 if (ref == NULL) 1408 return -ENOMEM; 1409 1410 ref->name = strdup(symbol_name); 1411 if (ref->name == NULL) { 1412 free(ref); 1413 return -ENOMEM; 1414 } 1415 1416 bracket = strchr(ref->name, ']'); 1417 if (bracket) 1418 *bracket = '\0'; 1419 1420 ref->addr = addr; 1421 1422 for (i = 0; i < MAP__NR_TYPES; ++i) { 1423 struct kmap *kmap = map__kmap(maps[i]); 1424 kmap->ref_reloc_sym = ref; 1425 } 1426 1427 return 0; 1428 } 1429 1430 size_t perf_session__fprintf_dsos(struct perf_session *self, FILE *fp) 1431 { 1432 return __dsos__fprintf(&self->host_machine.kernel_dsos, fp) + 1433 __dsos__fprintf(&self->host_machine.user_dsos, fp) + 1434 machines__fprintf_dsos(&self->machines, fp); 1435 } 1436 1437 size_t perf_session__fprintf_dsos_buildid(struct perf_session *self, FILE *fp, 1438 bool with_hits) 1439 { 1440 size_t ret = machine__fprintf_dsos_buildid(&self->host_machine, fp, with_hits); 1441 return ret + machines__fprintf_dsos_buildid(&self->machines, fp, with_hits); 1442 } 1443 1444 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp) 1445 { 1446 struct perf_evsel *pos; 1447 size_t ret = fprintf(fp, "Aggregated stats:\n"); 1448 1449 ret += hists__fprintf_nr_events(&session->hists, fp); 1450 1451 list_for_each_entry(pos, &session->evlist->entries, node) { 1452 ret += fprintf(fp, "%s stats:\n", event_name(pos)); 1453 ret += hists__fprintf_nr_events(&pos->hists, fp); 1454 } 1455 1456 return ret; 1457 } 1458 1459 size_t perf_session__fprintf(struct perf_session *session, FILE *fp) 1460 { 1461 /* 1462 * FIXME: Here we have to actually print all the machines in this 1463 * session, not just the host... 1464 */ 1465 return machine__fprintf(&session->host_machine, fp); 1466 } 1467 1468 void perf_session__remove_thread(struct perf_session *session, 1469 struct thread *th) 1470 { 1471 /* 1472 * FIXME: This one makes no sense, we need to remove the thread from 1473 * the machine it belongs to, perf_session can have many machines, so 1474 * doing it always on ->host_machine is wrong. Fix when auditing all 1475 * the 'perf kvm' code. 1476 */ 1477 machine__remove_thread(&session->host_machine, th); 1478 } 1479 1480 struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session, 1481 unsigned int type) 1482 { 1483 struct perf_evsel *pos; 1484 1485 list_for_each_entry(pos, &session->evlist->entries, node) { 1486 if (pos->attr.type == type) 1487 return pos; 1488 } 1489 return NULL; 1490 } 1491 1492 void perf_event__print_ip(union perf_event *event, struct perf_sample *sample, 1493 struct machine *machine, struct perf_evsel *evsel, 1494 int print_sym, int print_dso, int print_symoffset) 1495 { 1496 struct addr_location al; 1497 struct callchain_cursor_node *node; 1498 1499 if (perf_event__preprocess_sample(event, machine, &al, sample, 1500 NULL) < 0) { 1501 error("problem processing %d event, skipping it.\n", 1502 event->header.type); 1503 return; 1504 } 1505 1506 if (symbol_conf.use_callchain && sample->callchain) { 1507 1508 if (machine__resolve_callchain(machine, evsel, al.thread, 1509 sample->callchain, NULL) != 0) { 1510 if (verbose) 1511 error("Failed to resolve callchain. Skipping\n"); 1512 return; 1513 } 1514 callchain_cursor_commit(&callchain_cursor); 1515 1516 while (1) { 1517 node = callchain_cursor_current(&callchain_cursor); 1518 if (!node) 1519 break; 1520 1521 printf("\t%16" PRIx64, node->ip); 1522 if (print_sym) { 1523 printf(" "); 1524 symbol__fprintf_symname(node->sym, stdout); 1525 } 1526 if (print_dso) { 1527 printf(" ("); 1528 map__fprintf_dsoname(node->map, stdout); 1529 printf(")"); 1530 } 1531 printf("\n"); 1532 1533 callchain_cursor_advance(&callchain_cursor); 1534 } 1535 1536 } else { 1537 printf("%16" PRIx64, sample->ip); 1538 if (print_sym) { 1539 printf(" "); 1540 if (print_symoffset) 1541 symbol__fprintf_symname_offs(al.sym, &al, 1542 stdout); 1543 else 1544 symbol__fprintf_symname(al.sym, stdout); 1545 } 1546 1547 if (print_dso) { 1548 printf(" ("); 1549 map__fprintf_dsoname(al.map, stdout); 1550 printf(")"); 1551 } 1552 } 1553 } 1554 1555 int perf_session__cpu_bitmap(struct perf_session *session, 1556 const char *cpu_list, unsigned long *cpu_bitmap) 1557 { 1558 int i; 1559 struct cpu_map *map; 1560 1561 for (i = 0; i < PERF_TYPE_MAX; ++i) { 1562 struct perf_evsel *evsel; 1563 1564 evsel = perf_session__find_first_evtype(session, i); 1565 if (!evsel) 1566 continue; 1567 1568 if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) { 1569 pr_err("File does not contain CPU events. " 1570 "Remove -c option to proceed.\n"); 1571 return -1; 1572 } 1573 } 1574 1575 map = cpu_map__new(cpu_list); 1576 if (map == NULL) { 1577 pr_err("Invalid cpu_list\n"); 1578 return -1; 1579 } 1580 1581 for (i = 0; i < map->nr; i++) { 1582 int cpu = map->map[i]; 1583 1584 if (cpu >= MAX_NR_CPUS) { 1585 pr_err("Requested CPU %d too large. " 1586 "Consider raising MAX_NR_CPUS\n", cpu); 1587 return -1; 1588 } 1589 1590 set_bit(cpu, cpu_bitmap); 1591 } 1592 1593 return 0; 1594 } 1595 1596 void perf_session__fprintf_info(struct perf_session *session, FILE *fp, 1597 bool full) 1598 { 1599 struct stat st; 1600 int ret; 1601 1602 if (session == NULL || fp == NULL) 1603 return; 1604 1605 ret = fstat(session->fd, &st); 1606 if (ret == -1) 1607 return; 1608 1609 fprintf(fp, "# ========\n"); 1610 fprintf(fp, "# captured on: %s", ctime(&st.st_ctime)); 1611 perf_header__fprintf_info(session, fp, full); 1612 fprintf(fp, "# ========\n#\n"); 1613 } 1614