1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * auxtrace.c: AUX area trace support 4 * Copyright (c) 2013-2015, Intel Corporation. 5 */ 6 7 #include <inttypes.h> 8 #include <sys/types.h> 9 #include <sys/mman.h> 10 #include <stdbool.h> 11 #include <string.h> 12 #include <limits.h> 13 #include <errno.h> 14 15 #include <linux/kernel.h> 16 #include <linux/perf_event.h> 17 #include <linux/types.h> 18 #include <linux/bitops.h> 19 #include <linux/log2.h> 20 #include <linux/string.h> 21 #include <linux/time64.h> 22 23 #include <sys/param.h> 24 #include <stdlib.h> 25 #include <stdio.h> 26 #include <linux/list.h> 27 #include <linux/zalloc.h> 28 29 #include "evlist.h" 30 #include "dso.h" 31 #include "map.h" 32 #include "pmu.h" 33 #include "evsel.h" 34 #include "evsel_config.h" 35 #include "symbol.h" 36 #include "util/perf_api_probe.h" 37 #include "util/synthetic-events.h" 38 #include "thread_map.h" 39 #include "asm/bug.h" 40 #include "auxtrace.h" 41 42 #include <linux/hash.h> 43 44 #include "event.h" 45 #include "record.h" 46 #include "session.h" 47 #include "debug.h" 48 #include <subcmd/parse-options.h> 49 50 #include "cs-etm.h" 51 #include "intel-pt.h" 52 #include "intel-bts.h" 53 #include "arm-spe.h" 54 #include "s390-cpumsf.h" 55 #include "util/mmap.h" 56 57 #include <linux/ctype.h> 58 #include "symbol/kallsyms.h" 59 #include <internal/lib.h> 60 61 /* 62 * Make a group from 'leader' to 'last', requiring that the events were not 63 * already grouped to a different leader. 64 */ 65 static int evlist__regroup(struct evlist *evlist, struct evsel *leader, struct evsel *last) 66 { 67 struct evsel *evsel; 68 bool grp; 69 70 if (!evsel__is_group_leader(leader)) 71 return -EINVAL; 72 73 grp = false; 74 evlist__for_each_entry(evlist, evsel) { 75 if (grp) { 76 if (!(evsel__leader(evsel) == leader || 77 (evsel__leader(evsel) == evsel && 78 evsel->core.nr_members <= 1))) 79 return -EINVAL; 80 } else if (evsel == leader) { 81 grp = true; 82 } 83 if (evsel == last) 84 break; 85 } 86 87 grp = false; 88 evlist__for_each_entry(evlist, evsel) { 89 if (grp) { 90 if (!evsel__has_leader(evsel, leader)) { 91 evsel__set_leader(evsel, leader); 92 if (leader->core.nr_members < 1) 93 leader->core.nr_members = 1; 94 leader->core.nr_members += 1; 95 } 96 } else if (evsel == leader) { 97 grp = true; 98 } 99 if (evsel == last) 100 break; 101 } 102 103 return 0; 104 } 105 106 static bool auxtrace__dont_decode(struct perf_session *session) 107 { 108 return !session->itrace_synth_opts || 109 session->itrace_synth_opts->dont_decode; 110 } 111 112 int auxtrace_mmap__mmap(struct auxtrace_mmap *mm, 113 struct auxtrace_mmap_params *mp, 114 void *userpg, int fd) 115 { 116 struct perf_event_mmap_page *pc = userpg; 117 118 WARN_ONCE(mm->base, "Uninitialized auxtrace_mmap\n"); 119 120 mm->userpg = userpg; 121 mm->mask = mp->mask; 122 mm->len = mp->len; 123 mm->prev = 0; 124 mm->idx = mp->idx; 125 mm->tid = mp->tid; 126 mm->cpu = mp->cpu; 127 128 if (!mp->len) { 129 mm->base = NULL; 130 return 0; 131 } 132 133 #if BITS_PER_LONG != 64 && !defined(HAVE_SYNC_COMPARE_AND_SWAP_SUPPORT) 134 pr_err("Cannot use AUX area tracing mmaps\n"); 135 return -1; 136 #endif 137 138 pc->aux_offset = mp->offset; 139 pc->aux_size = mp->len; 140 141 mm->base = mmap(NULL, mp->len, mp->prot, MAP_SHARED, fd, mp->offset); 142 if (mm->base == MAP_FAILED) { 143 pr_debug2("failed to mmap AUX area\n"); 144 mm->base = NULL; 145 return -1; 146 } 147 148 return 0; 149 } 150 151 void auxtrace_mmap__munmap(struct auxtrace_mmap *mm) 152 { 153 if (mm->base) { 154 munmap(mm->base, mm->len); 155 mm->base = NULL; 156 } 157 } 158 159 void auxtrace_mmap_params__init(struct auxtrace_mmap_params *mp, 160 off_t auxtrace_offset, 161 unsigned int auxtrace_pages, 162 bool auxtrace_overwrite) 163 { 164 if (auxtrace_pages) { 165 mp->offset = auxtrace_offset; 166 mp->len = auxtrace_pages * (size_t)page_size; 167 mp->mask = is_power_of_2(mp->len) ? mp->len - 1 : 0; 168 mp->prot = PROT_READ | (auxtrace_overwrite ? 0 : PROT_WRITE); 169 pr_debug2("AUX area mmap length %zu\n", mp->len); 170 } else { 171 mp->len = 0; 172 } 173 } 174 175 void auxtrace_mmap_params__set_idx(struct auxtrace_mmap_params *mp, 176 struct evlist *evlist, int idx, 177 bool per_cpu) 178 { 179 mp->idx = idx; 180 181 if (per_cpu) { 182 mp->cpu = evlist->core.cpus->map[idx]; 183 if (evlist->core.threads) 184 mp->tid = perf_thread_map__pid(evlist->core.threads, 0); 185 else 186 mp->tid = -1; 187 } else { 188 mp->cpu = -1; 189 mp->tid = perf_thread_map__pid(evlist->core.threads, idx); 190 } 191 } 192 193 #define AUXTRACE_INIT_NR_QUEUES 32 194 195 static struct auxtrace_queue *auxtrace_alloc_queue_array(unsigned int nr_queues) 196 { 197 struct auxtrace_queue *queue_array; 198 unsigned int max_nr_queues, i; 199 200 max_nr_queues = UINT_MAX / sizeof(struct auxtrace_queue); 201 if (nr_queues > max_nr_queues) 202 return NULL; 203 204 queue_array = calloc(nr_queues, sizeof(struct auxtrace_queue)); 205 if (!queue_array) 206 return NULL; 207 208 for (i = 0; i < nr_queues; i++) { 209 INIT_LIST_HEAD(&queue_array[i].head); 210 queue_array[i].priv = NULL; 211 } 212 213 return queue_array; 214 } 215 216 int auxtrace_queues__init(struct auxtrace_queues *queues) 217 { 218 queues->nr_queues = AUXTRACE_INIT_NR_QUEUES; 219 queues->queue_array = auxtrace_alloc_queue_array(queues->nr_queues); 220 if (!queues->queue_array) 221 return -ENOMEM; 222 return 0; 223 } 224 225 static int auxtrace_queues__grow(struct auxtrace_queues *queues, 226 unsigned int new_nr_queues) 227 { 228 unsigned int nr_queues = queues->nr_queues; 229 struct auxtrace_queue *queue_array; 230 unsigned int i; 231 232 if (!nr_queues) 233 nr_queues = AUXTRACE_INIT_NR_QUEUES; 234 235 while (nr_queues && nr_queues < new_nr_queues) 236 nr_queues <<= 1; 237 238 if (nr_queues < queues->nr_queues || nr_queues < new_nr_queues) 239 return -EINVAL; 240 241 queue_array = auxtrace_alloc_queue_array(nr_queues); 242 if (!queue_array) 243 return -ENOMEM; 244 245 for (i = 0; i < queues->nr_queues; i++) { 246 list_splice_tail(&queues->queue_array[i].head, 247 &queue_array[i].head); 248 queue_array[i].tid = queues->queue_array[i].tid; 249 queue_array[i].cpu = queues->queue_array[i].cpu; 250 queue_array[i].set = queues->queue_array[i].set; 251 queue_array[i].priv = queues->queue_array[i].priv; 252 } 253 254 queues->nr_queues = nr_queues; 255 queues->queue_array = queue_array; 256 257 return 0; 258 } 259 260 static void *auxtrace_copy_data(u64 size, struct perf_session *session) 261 { 262 int fd = perf_data__fd(session->data); 263 void *p; 264 ssize_t ret; 265 266 if (size > SSIZE_MAX) 267 return NULL; 268 269 p = malloc(size); 270 if (!p) 271 return NULL; 272 273 ret = readn(fd, p, size); 274 if (ret != (ssize_t)size) { 275 free(p); 276 return NULL; 277 } 278 279 return p; 280 } 281 282 static int auxtrace_queues__queue_buffer(struct auxtrace_queues *queues, 283 unsigned int idx, 284 struct auxtrace_buffer *buffer) 285 { 286 struct auxtrace_queue *queue; 287 int err; 288 289 if (idx >= queues->nr_queues) { 290 err = auxtrace_queues__grow(queues, idx + 1); 291 if (err) 292 return err; 293 } 294 295 queue = &queues->queue_array[idx]; 296 297 if (!queue->set) { 298 queue->set = true; 299 queue->tid = buffer->tid; 300 queue->cpu = buffer->cpu; 301 } 302 303 buffer->buffer_nr = queues->next_buffer_nr++; 304 305 list_add_tail(&buffer->list, &queue->head); 306 307 queues->new_data = true; 308 queues->populated = true; 309 310 return 0; 311 } 312 313 /* Limit buffers to 32MiB on 32-bit */ 314 #define BUFFER_LIMIT_FOR_32_BIT (32 * 1024 * 1024) 315 316 static int auxtrace_queues__split_buffer(struct auxtrace_queues *queues, 317 unsigned int idx, 318 struct auxtrace_buffer *buffer) 319 { 320 u64 sz = buffer->size; 321 bool consecutive = false; 322 struct auxtrace_buffer *b; 323 int err; 324 325 while (sz > BUFFER_LIMIT_FOR_32_BIT) { 326 b = memdup(buffer, sizeof(struct auxtrace_buffer)); 327 if (!b) 328 return -ENOMEM; 329 b->size = BUFFER_LIMIT_FOR_32_BIT; 330 b->consecutive = consecutive; 331 err = auxtrace_queues__queue_buffer(queues, idx, b); 332 if (err) { 333 auxtrace_buffer__free(b); 334 return err; 335 } 336 buffer->data_offset += BUFFER_LIMIT_FOR_32_BIT; 337 sz -= BUFFER_LIMIT_FOR_32_BIT; 338 consecutive = true; 339 } 340 341 buffer->size = sz; 342 buffer->consecutive = consecutive; 343 344 return 0; 345 } 346 347 static bool filter_cpu(struct perf_session *session, int cpu) 348 { 349 unsigned long *cpu_bitmap = session->itrace_synth_opts->cpu_bitmap; 350 351 return cpu_bitmap && cpu != -1 && !test_bit(cpu, cpu_bitmap); 352 } 353 354 static int auxtrace_queues__add_buffer(struct auxtrace_queues *queues, 355 struct perf_session *session, 356 unsigned int idx, 357 struct auxtrace_buffer *buffer, 358 struct auxtrace_buffer **buffer_ptr) 359 { 360 int err = -ENOMEM; 361 362 if (filter_cpu(session, buffer->cpu)) 363 return 0; 364 365 buffer = memdup(buffer, sizeof(*buffer)); 366 if (!buffer) 367 return -ENOMEM; 368 369 if (session->one_mmap) { 370 buffer->data = buffer->data_offset - session->one_mmap_offset + 371 session->one_mmap_addr; 372 } else if (perf_data__is_pipe(session->data)) { 373 buffer->data = auxtrace_copy_data(buffer->size, session); 374 if (!buffer->data) 375 goto out_free; 376 buffer->data_needs_freeing = true; 377 } else if (BITS_PER_LONG == 32 && 378 buffer->size > BUFFER_LIMIT_FOR_32_BIT) { 379 err = auxtrace_queues__split_buffer(queues, idx, buffer); 380 if (err) 381 goto out_free; 382 } 383 384 err = auxtrace_queues__queue_buffer(queues, idx, buffer); 385 if (err) 386 goto out_free; 387 388 /* FIXME: Doesn't work for split buffer */ 389 if (buffer_ptr) 390 *buffer_ptr = buffer; 391 392 return 0; 393 394 out_free: 395 auxtrace_buffer__free(buffer); 396 return err; 397 } 398 399 int auxtrace_queues__add_event(struct auxtrace_queues *queues, 400 struct perf_session *session, 401 union perf_event *event, off_t data_offset, 402 struct auxtrace_buffer **buffer_ptr) 403 { 404 struct auxtrace_buffer buffer = { 405 .pid = -1, 406 .tid = event->auxtrace.tid, 407 .cpu = event->auxtrace.cpu, 408 .data_offset = data_offset, 409 .offset = event->auxtrace.offset, 410 .reference = event->auxtrace.reference, 411 .size = event->auxtrace.size, 412 }; 413 unsigned int idx = event->auxtrace.idx; 414 415 return auxtrace_queues__add_buffer(queues, session, idx, &buffer, 416 buffer_ptr); 417 } 418 419 static int auxtrace_queues__add_indexed_event(struct auxtrace_queues *queues, 420 struct perf_session *session, 421 off_t file_offset, size_t sz) 422 { 423 union perf_event *event; 424 int err; 425 char buf[PERF_SAMPLE_MAX_SIZE]; 426 427 err = perf_session__peek_event(session, file_offset, buf, 428 PERF_SAMPLE_MAX_SIZE, &event, NULL); 429 if (err) 430 return err; 431 432 if (event->header.type == PERF_RECORD_AUXTRACE) { 433 if (event->header.size < sizeof(struct perf_record_auxtrace) || 434 event->header.size != sz) { 435 err = -EINVAL; 436 goto out; 437 } 438 file_offset += event->header.size; 439 err = auxtrace_queues__add_event(queues, session, event, 440 file_offset, NULL); 441 } 442 out: 443 return err; 444 } 445 446 void auxtrace_queues__free(struct auxtrace_queues *queues) 447 { 448 unsigned int i; 449 450 for (i = 0; i < queues->nr_queues; i++) { 451 while (!list_empty(&queues->queue_array[i].head)) { 452 struct auxtrace_buffer *buffer; 453 454 buffer = list_entry(queues->queue_array[i].head.next, 455 struct auxtrace_buffer, list); 456 list_del_init(&buffer->list); 457 auxtrace_buffer__free(buffer); 458 } 459 } 460 461 zfree(&queues->queue_array); 462 queues->nr_queues = 0; 463 } 464 465 static void auxtrace_heapify(struct auxtrace_heap_item *heap_array, 466 unsigned int pos, unsigned int queue_nr, 467 u64 ordinal) 468 { 469 unsigned int parent; 470 471 while (pos) { 472 parent = (pos - 1) >> 1; 473 if (heap_array[parent].ordinal <= ordinal) 474 break; 475 heap_array[pos] = heap_array[parent]; 476 pos = parent; 477 } 478 heap_array[pos].queue_nr = queue_nr; 479 heap_array[pos].ordinal = ordinal; 480 } 481 482 int auxtrace_heap__add(struct auxtrace_heap *heap, unsigned int queue_nr, 483 u64 ordinal) 484 { 485 struct auxtrace_heap_item *heap_array; 486 487 if (queue_nr >= heap->heap_sz) { 488 unsigned int heap_sz = AUXTRACE_INIT_NR_QUEUES; 489 490 while (heap_sz <= queue_nr) 491 heap_sz <<= 1; 492 heap_array = realloc(heap->heap_array, 493 heap_sz * sizeof(struct auxtrace_heap_item)); 494 if (!heap_array) 495 return -ENOMEM; 496 heap->heap_array = heap_array; 497 heap->heap_sz = heap_sz; 498 } 499 500 auxtrace_heapify(heap->heap_array, heap->heap_cnt++, queue_nr, ordinal); 501 502 return 0; 503 } 504 505 void auxtrace_heap__free(struct auxtrace_heap *heap) 506 { 507 zfree(&heap->heap_array); 508 heap->heap_cnt = 0; 509 heap->heap_sz = 0; 510 } 511 512 void auxtrace_heap__pop(struct auxtrace_heap *heap) 513 { 514 unsigned int pos, last, heap_cnt = heap->heap_cnt; 515 struct auxtrace_heap_item *heap_array; 516 517 if (!heap_cnt) 518 return; 519 520 heap->heap_cnt -= 1; 521 522 heap_array = heap->heap_array; 523 524 pos = 0; 525 while (1) { 526 unsigned int left, right; 527 528 left = (pos << 1) + 1; 529 if (left >= heap_cnt) 530 break; 531 right = left + 1; 532 if (right >= heap_cnt) { 533 heap_array[pos] = heap_array[left]; 534 return; 535 } 536 if (heap_array[left].ordinal < heap_array[right].ordinal) { 537 heap_array[pos] = heap_array[left]; 538 pos = left; 539 } else { 540 heap_array[pos] = heap_array[right]; 541 pos = right; 542 } 543 } 544 545 last = heap_cnt - 1; 546 auxtrace_heapify(heap_array, pos, heap_array[last].queue_nr, 547 heap_array[last].ordinal); 548 } 549 550 size_t auxtrace_record__info_priv_size(struct auxtrace_record *itr, 551 struct evlist *evlist) 552 { 553 if (itr) 554 return itr->info_priv_size(itr, evlist); 555 return 0; 556 } 557 558 static int auxtrace_not_supported(void) 559 { 560 pr_err("AUX area tracing is not supported on this architecture\n"); 561 return -EINVAL; 562 } 563 564 int auxtrace_record__info_fill(struct auxtrace_record *itr, 565 struct perf_session *session, 566 struct perf_record_auxtrace_info *auxtrace_info, 567 size_t priv_size) 568 { 569 if (itr) 570 return itr->info_fill(itr, session, auxtrace_info, priv_size); 571 return auxtrace_not_supported(); 572 } 573 574 void auxtrace_record__free(struct auxtrace_record *itr) 575 { 576 if (itr) 577 itr->free(itr); 578 } 579 580 int auxtrace_record__snapshot_start(struct auxtrace_record *itr) 581 { 582 if (itr && itr->snapshot_start) 583 return itr->snapshot_start(itr); 584 return 0; 585 } 586 587 int auxtrace_record__snapshot_finish(struct auxtrace_record *itr, bool on_exit) 588 { 589 if (!on_exit && itr && itr->snapshot_finish) 590 return itr->snapshot_finish(itr); 591 return 0; 592 } 593 594 int auxtrace_record__find_snapshot(struct auxtrace_record *itr, int idx, 595 struct auxtrace_mmap *mm, 596 unsigned char *data, u64 *head, u64 *old) 597 { 598 if (itr && itr->find_snapshot) 599 return itr->find_snapshot(itr, idx, mm, data, head, old); 600 return 0; 601 } 602 603 int auxtrace_record__options(struct auxtrace_record *itr, 604 struct evlist *evlist, 605 struct record_opts *opts) 606 { 607 if (itr) { 608 itr->evlist = evlist; 609 return itr->recording_options(itr, evlist, opts); 610 } 611 return 0; 612 } 613 614 u64 auxtrace_record__reference(struct auxtrace_record *itr) 615 { 616 if (itr) 617 return itr->reference(itr); 618 return 0; 619 } 620 621 int auxtrace_parse_snapshot_options(struct auxtrace_record *itr, 622 struct record_opts *opts, const char *str) 623 { 624 if (!str) 625 return 0; 626 627 /* PMU-agnostic options */ 628 switch (*str) { 629 case 'e': 630 opts->auxtrace_snapshot_on_exit = true; 631 str++; 632 break; 633 default: 634 break; 635 } 636 637 if (itr && itr->parse_snapshot_options) 638 return itr->parse_snapshot_options(itr, opts, str); 639 640 pr_err("No AUX area tracing to snapshot\n"); 641 return -EINVAL; 642 } 643 644 int auxtrace_record__read_finish(struct auxtrace_record *itr, int idx) 645 { 646 struct evsel *evsel; 647 648 if (!itr->evlist || !itr->pmu) 649 return -EINVAL; 650 651 evlist__for_each_entry(itr->evlist, evsel) { 652 if (evsel->core.attr.type == itr->pmu->type) { 653 if (evsel->disabled) 654 return 0; 655 return evlist__enable_event_idx(itr->evlist, evsel, idx); 656 } 657 } 658 return -EINVAL; 659 } 660 661 /* 662 * Event record size is 16-bit which results in a maximum size of about 64KiB. 663 * Allow about 4KiB for the rest of the sample record, to give a maximum 664 * AUX area sample size of 60KiB. 665 */ 666 #define MAX_AUX_SAMPLE_SIZE (60 * 1024) 667 668 /* Arbitrary default size if no other default provided */ 669 #define DEFAULT_AUX_SAMPLE_SIZE (4 * 1024) 670 671 static int auxtrace_validate_aux_sample_size(struct evlist *evlist, 672 struct record_opts *opts) 673 { 674 struct evsel *evsel; 675 bool has_aux_leader = false; 676 u32 sz; 677 678 evlist__for_each_entry(evlist, evsel) { 679 sz = evsel->core.attr.aux_sample_size; 680 if (evsel__is_group_leader(evsel)) { 681 has_aux_leader = evsel__is_aux_event(evsel); 682 if (sz) { 683 if (has_aux_leader) 684 pr_err("Cannot add AUX area sampling to an AUX area event\n"); 685 else 686 pr_err("Cannot add AUX area sampling to a group leader\n"); 687 return -EINVAL; 688 } 689 } 690 if (sz > MAX_AUX_SAMPLE_SIZE) { 691 pr_err("AUX area sample size %u too big, max. %d\n", 692 sz, MAX_AUX_SAMPLE_SIZE); 693 return -EINVAL; 694 } 695 if (sz) { 696 if (!has_aux_leader) { 697 pr_err("Cannot add AUX area sampling because group leader is not an AUX area event\n"); 698 return -EINVAL; 699 } 700 evsel__set_sample_bit(evsel, AUX); 701 opts->auxtrace_sample_mode = true; 702 } else { 703 evsel__reset_sample_bit(evsel, AUX); 704 } 705 } 706 707 if (!opts->auxtrace_sample_mode) { 708 pr_err("AUX area sampling requires an AUX area event group leader plus other events to which to add samples\n"); 709 return -EINVAL; 710 } 711 712 if (!perf_can_aux_sample()) { 713 pr_err("AUX area sampling is not supported by kernel\n"); 714 return -EINVAL; 715 } 716 717 return 0; 718 } 719 720 int auxtrace_parse_sample_options(struct auxtrace_record *itr, 721 struct evlist *evlist, 722 struct record_opts *opts, const char *str) 723 { 724 struct evsel_config_term *term; 725 struct evsel *aux_evsel; 726 bool has_aux_sample_size = false; 727 bool has_aux_leader = false; 728 struct evsel *evsel; 729 char *endptr; 730 unsigned long sz; 731 732 if (!str) 733 goto no_opt; 734 735 if (!itr) { 736 pr_err("No AUX area event to sample\n"); 737 return -EINVAL; 738 } 739 740 sz = strtoul(str, &endptr, 0); 741 if (*endptr || sz > UINT_MAX) { 742 pr_err("Bad AUX area sampling option: '%s'\n", str); 743 return -EINVAL; 744 } 745 746 if (!sz) 747 sz = itr->default_aux_sample_size; 748 749 if (!sz) 750 sz = DEFAULT_AUX_SAMPLE_SIZE; 751 752 /* Set aux_sample_size based on --aux-sample option */ 753 evlist__for_each_entry(evlist, evsel) { 754 if (evsel__is_group_leader(evsel)) { 755 has_aux_leader = evsel__is_aux_event(evsel); 756 } else if (has_aux_leader) { 757 evsel->core.attr.aux_sample_size = sz; 758 } 759 } 760 no_opt: 761 aux_evsel = NULL; 762 /* Override with aux_sample_size from config term */ 763 evlist__for_each_entry(evlist, evsel) { 764 if (evsel__is_aux_event(evsel)) 765 aux_evsel = evsel; 766 term = evsel__get_config_term(evsel, AUX_SAMPLE_SIZE); 767 if (term) { 768 has_aux_sample_size = true; 769 evsel->core.attr.aux_sample_size = term->val.aux_sample_size; 770 /* If possible, group with the AUX event */ 771 if (aux_evsel && evsel->core.attr.aux_sample_size) 772 evlist__regroup(evlist, aux_evsel, evsel); 773 } 774 } 775 776 if (!str && !has_aux_sample_size) 777 return 0; 778 779 if (!itr) { 780 pr_err("No AUX area event to sample\n"); 781 return -EINVAL; 782 } 783 784 return auxtrace_validate_aux_sample_size(evlist, opts); 785 } 786 787 void auxtrace_regroup_aux_output(struct evlist *evlist) 788 { 789 struct evsel *evsel, *aux_evsel = NULL; 790 struct evsel_config_term *term; 791 792 evlist__for_each_entry(evlist, evsel) { 793 if (evsel__is_aux_event(evsel)) 794 aux_evsel = evsel; 795 term = evsel__get_config_term(evsel, AUX_OUTPUT); 796 /* If possible, group with the AUX event */ 797 if (term && aux_evsel) 798 evlist__regroup(evlist, aux_evsel, evsel); 799 } 800 } 801 802 struct auxtrace_record *__weak 803 auxtrace_record__init(struct evlist *evlist __maybe_unused, int *err) 804 { 805 *err = 0; 806 return NULL; 807 } 808 809 static int auxtrace_index__alloc(struct list_head *head) 810 { 811 struct auxtrace_index *auxtrace_index; 812 813 auxtrace_index = malloc(sizeof(struct auxtrace_index)); 814 if (!auxtrace_index) 815 return -ENOMEM; 816 817 auxtrace_index->nr = 0; 818 INIT_LIST_HEAD(&auxtrace_index->list); 819 820 list_add_tail(&auxtrace_index->list, head); 821 822 return 0; 823 } 824 825 void auxtrace_index__free(struct list_head *head) 826 { 827 struct auxtrace_index *auxtrace_index, *n; 828 829 list_for_each_entry_safe(auxtrace_index, n, head, list) { 830 list_del_init(&auxtrace_index->list); 831 free(auxtrace_index); 832 } 833 } 834 835 static struct auxtrace_index *auxtrace_index__last(struct list_head *head) 836 { 837 struct auxtrace_index *auxtrace_index; 838 int err; 839 840 if (list_empty(head)) { 841 err = auxtrace_index__alloc(head); 842 if (err) 843 return NULL; 844 } 845 846 auxtrace_index = list_entry(head->prev, struct auxtrace_index, list); 847 848 if (auxtrace_index->nr >= PERF_AUXTRACE_INDEX_ENTRY_COUNT) { 849 err = auxtrace_index__alloc(head); 850 if (err) 851 return NULL; 852 auxtrace_index = list_entry(head->prev, struct auxtrace_index, 853 list); 854 } 855 856 return auxtrace_index; 857 } 858 859 int auxtrace_index__auxtrace_event(struct list_head *head, 860 union perf_event *event, off_t file_offset) 861 { 862 struct auxtrace_index *auxtrace_index; 863 size_t nr; 864 865 auxtrace_index = auxtrace_index__last(head); 866 if (!auxtrace_index) 867 return -ENOMEM; 868 869 nr = auxtrace_index->nr; 870 auxtrace_index->entries[nr].file_offset = file_offset; 871 auxtrace_index->entries[nr].sz = event->header.size; 872 auxtrace_index->nr += 1; 873 874 return 0; 875 } 876 877 static int auxtrace_index__do_write(int fd, 878 struct auxtrace_index *auxtrace_index) 879 { 880 struct auxtrace_index_entry ent; 881 size_t i; 882 883 for (i = 0; i < auxtrace_index->nr; i++) { 884 ent.file_offset = auxtrace_index->entries[i].file_offset; 885 ent.sz = auxtrace_index->entries[i].sz; 886 if (writen(fd, &ent, sizeof(ent)) != sizeof(ent)) 887 return -errno; 888 } 889 return 0; 890 } 891 892 int auxtrace_index__write(int fd, struct list_head *head) 893 { 894 struct auxtrace_index *auxtrace_index; 895 u64 total = 0; 896 int err; 897 898 list_for_each_entry(auxtrace_index, head, list) 899 total += auxtrace_index->nr; 900 901 if (writen(fd, &total, sizeof(total)) != sizeof(total)) 902 return -errno; 903 904 list_for_each_entry(auxtrace_index, head, list) { 905 err = auxtrace_index__do_write(fd, auxtrace_index); 906 if (err) 907 return err; 908 } 909 910 return 0; 911 } 912 913 static int auxtrace_index__process_entry(int fd, struct list_head *head, 914 bool needs_swap) 915 { 916 struct auxtrace_index *auxtrace_index; 917 struct auxtrace_index_entry ent; 918 size_t nr; 919 920 if (readn(fd, &ent, sizeof(ent)) != sizeof(ent)) 921 return -1; 922 923 auxtrace_index = auxtrace_index__last(head); 924 if (!auxtrace_index) 925 return -1; 926 927 nr = auxtrace_index->nr; 928 if (needs_swap) { 929 auxtrace_index->entries[nr].file_offset = 930 bswap_64(ent.file_offset); 931 auxtrace_index->entries[nr].sz = bswap_64(ent.sz); 932 } else { 933 auxtrace_index->entries[nr].file_offset = ent.file_offset; 934 auxtrace_index->entries[nr].sz = ent.sz; 935 } 936 937 auxtrace_index->nr = nr + 1; 938 939 return 0; 940 } 941 942 int auxtrace_index__process(int fd, u64 size, struct perf_session *session, 943 bool needs_swap) 944 { 945 struct list_head *head = &session->auxtrace_index; 946 u64 nr; 947 948 if (readn(fd, &nr, sizeof(u64)) != sizeof(u64)) 949 return -1; 950 951 if (needs_swap) 952 nr = bswap_64(nr); 953 954 if (sizeof(u64) + nr * sizeof(struct auxtrace_index_entry) > size) 955 return -1; 956 957 while (nr--) { 958 int err; 959 960 err = auxtrace_index__process_entry(fd, head, needs_swap); 961 if (err) 962 return -1; 963 } 964 965 return 0; 966 } 967 968 static int auxtrace_queues__process_index_entry(struct auxtrace_queues *queues, 969 struct perf_session *session, 970 struct auxtrace_index_entry *ent) 971 { 972 return auxtrace_queues__add_indexed_event(queues, session, 973 ent->file_offset, ent->sz); 974 } 975 976 int auxtrace_queues__process_index(struct auxtrace_queues *queues, 977 struct perf_session *session) 978 { 979 struct auxtrace_index *auxtrace_index; 980 struct auxtrace_index_entry *ent; 981 size_t i; 982 int err; 983 984 if (auxtrace__dont_decode(session)) 985 return 0; 986 987 list_for_each_entry(auxtrace_index, &session->auxtrace_index, list) { 988 for (i = 0; i < auxtrace_index->nr; i++) { 989 ent = &auxtrace_index->entries[i]; 990 err = auxtrace_queues__process_index_entry(queues, 991 session, 992 ent); 993 if (err) 994 return err; 995 } 996 } 997 return 0; 998 } 999 1000 struct auxtrace_buffer *auxtrace_buffer__next(struct auxtrace_queue *queue, 1001 struct auxtrace_buffer *buffer) 1002 { 1003 if (buffer) { 1004 if (list_is_last(&buffer->list, &queue->head)) 1005 return NULL; 1006 return list_entry(buffer->list.next, struct auxtrace_buffer, 1007 list); 1008 } else { 1009 if (list_empty(&queue->head)) 1010 return NULL; 1011 return list_entry(queue->head.next, struct auxtrace_buffer, 1012 list); 1013 } 1014 } 1015 1016 struct auxtrace_queue *auxtrace_queues__sample_queue(struct auxtrace_queues *queues, 1017 struct perf_sample *sample, 1018 struct perf_session *session) 1019 { 1020 struct perf_sample_id *sid; 1021 unsigned int idx; 1022 u64 id; 1023 1024 id = sample->id; 1025 if (!id) 1026 return NULL; 1027 1028 sid = evlist__id2sid(session->evlist, id); 1029 if (!sid) 1030 return NULL; 1031 1032 idx = sid->idx; 1033 1034 if (idx >= queues->nr_queues) 1035 return NULL; 1036 1037 return &queues->queue_array[idx]; 1038 } 1039 1040 int auxtrace_queues__add_sample(struct auxtrace_queues *queues, 1041 struct perf_session *session, 1042 struct perf_sample *sample, u64 data_offset, 1043 u64 reference) 1044 { 1045 struct auxtrace_buffer buffer = { 1046 .pid = -1, 1047 .data_offset = data_offset, 1048 .reference = reference, 1049 .size = sample->aux_sample.size, 1050 }; 1051 struct perf_sample_id *sid; 1052 u64 id = sample->id; 1053 unsigned int idx; 1054 1055 if (!id) 1056 return -EINVAL; 1057 1058 sid = evlist__id2sid(session->evlist, id); 1059 if (!sid) 1060 return -ENOENT; 1061 1062 idx = sid->idx; 1063 buffer.tid = sid->tid; 1064 buffer.cpu = sid->cpu; 1065 1066 return auxtrace_queues__add_buffer(queues, session, idx, &buffer, NULL); 1067 } 1068 1069 struct queue_data { 1070 bool samples; 1071 bool events; 1072 }; 1073 1074 static int auxtrace_queue_data_cb(struct perf_session *session, 1075 union perf_event *event, u64 offset, 1076 void *data) 1077 { 1078 struct queue_data *qd = data; 1079 struct perf_sample sample; 1080 int err; 1081 1082 if (qd->events && event->header.type == PERF_RECORD_AUXTRACE) { 1083 if (event->header.size < sizeof(struct perf_record_auxtrace)) 1084 return -EINVAL; 1085 offset += event->header.size; 1086 return session->auxtrace->queue_data(session, NULL, event, 1087 offset); 1088 } 1089 1090 if (!qd->samples || event->header.type != PERF_RECORD_SAMPLE) 1091 return 0; 1092 1093 err = evlist__parse_sample(session->evlist, event, &sample); 1094 if (err) 1095 return err; 1096 1097 if (!sample.aux_sample.size) 1098 return 0; 1099 1100 offset += sample.aux_sample.data - (void *)event; 1101 1102 return session->auxtrace->queue_data(session, &sample, NULL, offset); 1103 } 1104 1105 int auxtrace_queue_data(struct perf_session *session, bool samples, bool events) 1106 { 1107 struct queue_data qd = { 1108 .samples = samples, 1109 .events = events, 1110 }; 1111 1112 if (auxtrace__dont_decode(session)) 1113 return 0; 1114 1115 if (!session->auxtrace || !session->auxtrace->queue_data) 1116 return -EINVAL; 1117 1118 return perf_session__peek_events(session, session->header.data_offset, 1119 session->header.data_size, 1120 auxtrace_queue_data_cb, &qd); 1121 } 1122 1123 void *auxtrace_buffer__get_data_rw(struct auxtrace_buffer *buffer, int fd, bool rw) 1124 { 1125 int prot = rw ? PROT_READ | PROT_WRITE : PROT_READ; 1126 size_t adj = buffer->data_offset & (page_size - 1); 1127 size_t size = buffer->size + adj; 1128 off_t file_offset = buffer->data_offset - adj; 1129 void *addr; 1130 1131 if (buffer->data) 1132 return buffer->data; 1133 1134 addr = mmap(NULL, size, prot, MAP_SHARED, fd, file_offset); 1135 if (addr == MAP_FAILED) 1136 return NULL; 1137 1138 buffer->mmap_addr = addr; 1139 buffer->mmap_size = size; 1140 1141 buffer->data = addr + adj; 1142 1143 return buffer->data; 1144 } 1145 1146 void auxtrace_buffer__put_data(struct auxtrace_buffer *buffer) 1147 { 1148 if (!buffer->data || !buffer->mmap_addr) 1149 return; 1150 munmap(buffer->mmap_addr, buffer->mmap_size); 1151 buffer->mmap_addr = NULL; 1152 buffer->mmap_size = 0; 1153 buffer->data = NULL; 1154 buffer->use_data = NULL; 1155 } 1156 1157 void auxtrace_buffer__drop_data(struct auxtrace_buffer *buffer) 1158 { 1159 auxtrace_buffer__put_data(buffer); 1160 if (buffer->data_needs_freeing) { 1161 buffer->data_needs_freeing = false; 1162 zfree(&buffer->data); 1163 buffer->use_data = NULL; 1164 buffer->size = 0; 1165 } 1166 } 1167 1168 void auxtrace_buffer__free(struct auxtrace_buffer *buffer) 1169 { 1170 auxtrace_buffer__drop_data(buffer); 1171 free(buffer); 1172 } 1173 1174 void auxtrace_synth_error(struct perf_record_auxtrace_error *auxtrace_error, int type, 1175 int code, int cpu, pid_t pid, pid_t tid, u64 ip, 1176 const char *msg, u64 timestamp) 1177 { 1178 size_t size; 1179 1180 memset(auxtrace_error, 0, sizeof(struct perf_record_auxtrace_error)); 1181 1182 auxtrace_error->header.type = PERF_RECORD_AUXTRACE_ERROR; 1183 auxtrace_error->type = type; 1184 auxtrace_error->code = code; 1185 auxtrace_error->cpu = cpu; 1186 auxtrace_error->pid = pid; 1187 auxtrace_error->tid = tid; 1188 auxtrace_error->fmt = 1; 1189 auxtrace_error->ip = ip; 1190 auxtrace_error->time = timestamp; 1191 strlcpy(auxtrace_error->msg, msg, MAX_AUXTRACE_ERROR_MSG); 1192 1193 size = (void *)auxtrace_error->msg - (void *)auxtrace_error + 1194 strlen(auxtrace_error->msg) + 1; 1195 auxtrace_error->header.size = PERF_ALIGN(size, sizeof(u64)); 1196 } 1197 1198 int perf_event__synthesize_auxtrace_info(struct auxtrace_record *itr, 1199 struct perf_tool *tool, 1200 struct perf_session *session, 1201 perf_event__handler_t process) 1202 { 1203 union perf_event *ev; 1204 size_t priv_size; 1205 int err; 1206 1207 pr_debug2("Synthesizing auxtrace information\n"); 1208 priv_size = auxtrace_record__info_priv_size(itr, session->evlist); 1209 ev = zalloc(sizeof(struct perf_record_auxtrace_info) + priv_size); 1210 if (!ev) 1211 return -ENOMEM; 1212 1213 ev->auxtrace_info.header.type = PERF_RECORD_AUXTRACE_INFO; 1214 ev->auxtrace_info.header.size = sizeof(struct perf_record_auxtrace_info) + 1215 priv_size; 1216 err = auxtrace_record__info_fill(itr, session, &ev->auxtrace_info, 1217 priv_size); 1218 if (err) 1219 goto out_free; 1220 1221 err = process(tool, ev, NULL, NULL); 1222 out_free: 1223 free(ev); 1224 return err; 1225 } 1226 1227 static void unleader_evsel(struct evlist *evlist, struct evsel *leader) 1228 { 1229 struct evsel *new_leader = NULL; 1230 struct evsel *evsel; 1231 1232 /* Find new leader for the group */ 1233 evlist__for_each_entry(evlist, evsel) { 1234 if (!evsel__has_leader(evsel, leader) || evsel == leader) 1235 continue; 1236 if (!new_leader) 1237 new_leader = evsel; 1238 evsel__set_leader(evsel, new_leader); 1239 } 1240 1241 /* Update group information */ 1242 if (new_leader) { 1243 zfree(&new_leader->group_name); 1244 new_leader->group_name = leader->group_name; 1245 leader->group_name = NULL; 1246 1247 new_leader->core.nr_members = leader->core.nr_members - 1; 1248 leader->core.nr_members = 1; 1249 } 1250 } 1251 1252 static void unleader_auxtrace(struct perf_session *session) 1253 { 1254 struct evsel *evsel; 1255 1256 evlist__for_each_entry(session->evlist, evsel) { 1257 if (auxtrace__evsel_is_auxtrace(session, evsel) && 1258 evsel__is_group_leader(evsel)) { 1259 unleader_evsel(session->evlist, evsel); 1260 } 1261 } 1262 } 1263 1264 int perf_event__process_auxtrace_info(struct perf_session *session, 1265 union perf_event *event) 1266 { 1267 enum auxtrace_type type = event->auxtrace_info.type; 1268 int err; 1269 1270 if (dump_trace) 1271 fprintf(stdout, " type: %u\n", type); 1272 1273 switch (type) { 1274 case PERF_AUXTRACE_INTEL_PT: 1275 err = intel_pt_process_auxtrace_info(event, session); 1276 break; 1277 case PERF_AUXTRACE_INTEL_BTS: 1278 err = intel_bts_process_auxtrace_info(event, session); 1279 break; 1280 case PERF_AUXTRACE_ARM_SPE: 1281 err = arm_spe_process_auxtrace_info(event, session); 1282 break; 1283 case PERF_AUXTRACE_CS_ETM: 1284 err = cs_etm__process_auxtrace_info(event, session); 1285 break; 1286 case PERF_AUXTRACE_S390_CPUMSF: 1287 err = s390_cpumsf_process_auxtrace_info(event, session); 1288 break; 1289 case PERF_AUXTRACE_UNKNOWN: 1290 default: 1291 return -EINVAL; 1292 } 1293 1294 if (err) 1295 return err; 1296 1297 unleader_auxtrace(session); 1298 1299 return 0; 1300 } 1301 1302 s64 perf_event__process_auxtrace(struct perf_session *session, 1303 union perf_event *event) 1304 { 1305 s64 err; 1306 1307 if (dump_trace) 1308 fprintf(stdout, " size: %#"PRI_lx64" offset: %#"PRI_lx64" ref: %#"PRI_lx64" idx: %u tid: %d cpu: %d\n", 1309 event->auxtrace.size, event->auxtrace.offset, 1310 event->auxtrace.reference, event->auxtrace.idx, 1311 event->auxtrace.tid, event->auxtrace.cpu); 1312 1313 if (auxtrace__dont_decode(session)) 1314 return event->auxtrace.size; 1315 1316 if (!session->auxtrace || event->header.type != PERF_RECORD_AUXTRACE) 1317 return -EINVAL; 1318 1319 err = session->auxtrace->process_auxtrace_event(session, event, session->tool); 1320 if (err < 0) 1321 return err; 1322 1323 return event->auxtrace.size; 1324 } 1325 1326 #define PERF_ITRACE_DEFAULT_PERIOD_TYPE PERF_ITRACE_PERIOD_NANOSECS 1327 #define PERF_ITRACE_DEFAULT_PERIOD 100000 1328 #define PERF_ITRACE_DEFAULT_CALLCHAIN_SZ 16 1329 #define PERF_ITRACE_MAX_CALLCHAIN_SZ 1024 1330 #define PERF_ITRACE_DEFAULT_LAST_BRANCH_SZ 64 1331 #define PERF_ITRACE_MAX_LAST_BRANCH_SZ 1024 1332 1333 void itrace_synth_opts__set_default(struct itrace_synth_opts *synth_opts, 1334 bool no_sample) 1335 { 1336 synth_opts->branches = true; 1337 synth_opts->transactions = true; 1338 synth_opts->ptwrites = true; 1339 synth_opts->pwr_events = true; 1340 synth_opts->other_events = true; 1341 synth_opts->errors = true; 1342 synth_opts->flc = true; 1343 synth_opts->llc = true; 1344 synth_opts->tlb = true; 1345 synth_opts->mem = true; 1346 synth_opts->remote_access = true; 1347 1348 if (no_sample) { 1349 synth_opts->period_type = PERF_ITRACE_PERIOD_INSTRUCTIONS; 1350 synth_opts->period = 1; 1351 synth_opts->calls = true; 1352 } else { 1353 synth_opts->instructions = true; 1354 synth_opts->period_type = PERF_ITRACE_DEFAULT_PERIOD_TYPE; 1355 synth_opts->period = PERF_ITRACE_DEFAULT_PERIOD; 1356 } 1357 synth_opts->callchain_sz = PERF_ITRACE_DEFAULT_CALLCHAIN_SZ; 1358 synth_opts->last_branch_sz = PERF_ITRACE_DEFAULT_LAST_BRANCH_SZ; 1359 synth_opts->initial_skip = 0; 1360 } 1361 1362 static int get_flag(const char **ptr, unsigned int *flags) 1363 { 1364 while (1) { 1365 char c = **ptr; 1366 1367 if (c >= 'a' && c <= 'z') { 1368 *flags |= 1 << (c - 'a'); 1369 ++*ptr; 1370 return 0; 1371 } else if (c == ' ') { 1372 ++*ptr; 1373 continue; 1374 } else { 1375 return -1; 1376 } 1377 } 1378 } 1379 1380 static int get_flags(const char **ptr, unsigned int *plus_flags, unsigned int *minus_flags) 1381 { 1382 while (1) { 1383 switch (**ptr) { 1384 case '+': 1385 ++*ptr; 1386 if (get_flag(ptr, plus_flags)) 1387 return -1; 1388 break; 1389 case '-': 1390 ++*ptr; 1391 if (get_flag(ptr, minus_flags)) 1392 return -1; 1393 break; 1394 case ' ': 1395 ++*ptr; 1396 break; 1397 default: 1398 return 0; 1399 } 1400 } 1401 } 1402 1403 /* 1404 * Please check tools/perf/Documentation/perf-script.txt for information 1405 * about the options parsed here, which is introduced after this cset, 1406 * when support in 'perf script' for these options is introduced. 1407 */ 1408 int itrace_do_parse_synth_opts(struct itrace_synth_opts *synth_opts, 1409 const char *str, int unset) 1410 { 1411 const char *p; 1412 char *endptr; 1413 bool period_type_set = false; 1414 bool period_set = false; 1415 1416 synth_opts->set = true; 1417 1418 if (unset) { 1419 synth_opts->dont_decode = true; 1420 return 0; 1421 } 1422 1423 if (!str) { 1424 itrace_synth_opts__set_default(synth_opts, 1425 synth_opts->default_no_sample); 1426 return 0; 1427 } 1428 1429 for (p = str; *p;) { 1430 switch (*p++) { 1431 case 'i': 1432 synth_opts->instructions = true; 1433 while (*p == ' ' || *p == ',') 1434 p += 1; 1435 if (isdigit(*p)) { 1436 synth_opts->period = strtoull(p, &endptr, 10); 1437 period_set = true; 1438 p = endptr; 1439 while (*p == ' ' || *p == ',') 1440 p += 1; 1441 switch (*p++) { 1442 case 'i': 1443 synth_opts->period_type = 1444 PERF_ITRACE_PERIOD_INSTRUCTIONS; 1445 period_type_set = true; 1446 break; 1447 case 't': 1448 synth_opts->period_type = 1449 PERF_ITRACE_PERIOD_TICKS; 1450 period_type_set = true; 1451 break; 1452 case 'm': 1453 synth_opts->period *= 1000; 1454 /* Fall through */ 1455 case 'u': 1456 synth_opts->period *= 1000; 1457 /* Fall through */ 1458 case 'n': 1459 if (*p++ != 's') 1460 goto out_err; 1461 synth_opts->period_type = 1462 PERF_ITRACE_PERIOD_NANOSECS; 1463 period_type_set = true; 1464 break; 1465 case '\0': 1466 goto out; 1467 default: 1468 goto out_err; 1469 } 1470 } 1471 break; 1472 case 'b': 1473 synth_opts->branches = true; 1474 break; 1475 case 'x': 1476 synth_opts->transactions = true; 1477 break; 1478 case 'w': 1479 synth_opts->ptwrites = true; 1480 break; 1481 case 'p': 1482 synth_opts->pwr_events = true; 1483 break; 1484 case 'o': 1485 synth_opts->other_events = true; 1486 break; 1487 case 'e': 1488 synth_opts->errors = true; 1489 if (get_flags(&p, &synth_opts->error_plus_flags, 1490 &synth_opts->error_minus_flags)) 1491 goto out_err; 1492 break; 1493 case 'd': 1494 synth_opts->log = true; 1495 if (get_flags(&p, &synth_opts->log_plus_flags, 1496 &synth_opts->log_minus_flags)) 1497 goto out_err; 1498 break; 1499 case 'c': 1500 synth_opts->branches = true; 1501 synth_opts->calls = true; 1502 break; 1503 case 'r': 1504 synth_opts->branches = true; 1505 synth_opts->returns = true; 1506 break; 1507 case 'G': 1508 case 'g': 1509 if (p[-1] == 'G') 1510 synth_opts->add_callchain = true; 1511 else 1512 synth_opts->callchain = true; 1513 synth_opts->callchain_sz = 1514 PERF_ITRACE_DEFAULT_CALLCHAIN_SZ; 1515 while (*p == ' ' || *p == ',') 1516 p += 1; 1517 if (isdigit(*p)) { 1518 unsigned int val; 1519 1520 val = strtoul(p, &endptr, 10); 1521 p = endptr; 1522 if (!val || val > PERF_ITRACE_MAX_CALLCHAIN_SZ) 1523 goto out_err; 1524 synth_opts->callchain_sz = val; 1525 } 1526 break; 1527 case 'L': 1528 case 'l': 1529 if (p[-1] == 'L') 1530 synth_opts->add_last_branch = true; 1531 else 1532 synth_opts->last_branch = true; 1533 synth_opts->last_branch_sz = 1534 PERF_ITRACE_DEFAULT_LAST_BRANCH_SZ; 1535 while (*p == ' ' || *p == ',') 1536 p += 1; 1537 if (isdigit(*p)) { 1538 unsigned int val; 1539 1540 val = strtoul(p, &endptr, 10); 1541 p = endptr; 1542 if (!val || 1543 val > PERF_ITRACE_MAX_LAST_BRANCH_SZ) 1544 goto out_err; 1545 synth_opts->last_branch_sz = val; 1546 } 1547 break; 1548 case 's': 1549 synth_opts->initial_skip = strtoul(p, &endptr, 10); 1550 if (p == endptr) 1551 goto out_err; 1552 p = endptr; 1553 break; 1554 case 'f': 1555 synth_opts->flc = true; 1556 break; 1557 case 'm': 1558 synth_opts->llc = true; 1559 break; 1560 case 't': 1561 synth_opts->tlb = true; 1562 break; 1563 case 'a': 1564 synth_opts->remote_access = true; 1565 break; 1566 case 'M': 1567 synth_opts->mem = true; 1568 break; 1569 case 'q': 1570 synth_opts->quick += 1; 1571 break; 1572 case 'Z': 1573 synth_opts->timeless_decoding = true; 1574 break; 1575 case ' ': 1576 case ',': 1577 break; 1578 default: 1579 goto out_err; 1580 } 1581 } 1582 out: 1583 if (synth_opts->instructions) { 1584 if (!period_type_set) 1585 synth_opts->period_type = 1586 PERF_ITRACE_DEFAULT_PERIOD_TYPE; 1587 if (!period_set) 1588 synth_opts->period = PERF_ITRACE_DEFAULT_PERIOD; 1589 } 1590 1591 return 0; 1592 1593 out_err: 1594 pr_err("Bad Instruction Tracing options '%s'\n", str); 1595 return -EINVAL; 1596 } 1597 1598 int itrace_parse_synth_opts(const struct option *opt, const char *str, int unset) 1599 { 1600 return itrace_do_parse_synth_opts(opt->value, str, unset); 1601 } 1602 1603 static const char * const auxtrace_error_type_name[] = { 1604 [PERF_AUXTRACE_ERROR_ITRACE] = "instruction trace", 1605 }; 1606 1607 static const char *auxtrace_error_name(int type) 1608 { 1609 const char *error_type_name = NULL; 1610 1611 if (type < PERF_AUXTRACE_ERROR_MAX) 1612 error_type_name = auxtrace_error_type_name[type]; 1613 if (!error_type_name) 1614 error_type_name = "unknown AUX"; 1615 return error_type_name; 1616 } 1617 1618 size_t perf_event__fprintf_auxtrace_error(union perf_event *event, FILE *fp) 1619 { 1620 struct perf_record_auxtrace_error *e = &event->auxtrace_error; 1621 unsigned long long nsecs = e->time; 1622 const char *msg = e->msg; 1623 int ret; 1624 1625 ret = fprintf(fp, " %s error type %u", 1626 auxtrace_error_name(e->type), e->type); 1627 1628 if (e->fmt && nsecs) { 1629 unsigned long secs = nsecs / NSEC_PER_SEC; 1630 1631 nsecs -= secs * NSEC_PER_SEC; 1632 ret += fprintf(fp, " time %lu.%09llu", secs, nsecs); 1633 } else { 1634 ret += fprintf(fp, " time 0"); 1635 } 1636 1637 if (!e->fmt) 1638 msg = (const char *)&e->time; 1639 1640 ret += fprintf(fp, " cpu %d pid %d tid %d ip %#"PRI_lx64" code %u: %s\n", 1641 e->cpu, e->pid, e->tid, e->ip, e->code, msg); 1642 return ret; 1643 } 1644 1645 void perf_session__auxtrace_error_inc(struct perf_session *session, 1646 union perf_event *event) 1647 { 1648 struct perf_record_auxtrace_error *e = &event->auxtrace_error; 1649 1650 if (e->type < PERF_AUXTRACE_ERROR_MAX) 1651 session->evlist->stats.nr_auxtrace_errors[e->type] += 1; 1652 } 1653 1654 void events_stats__auxtrace_error_warn(const struct events_stats *stats) 1655 { 1656 int i; 1657 1658 for (i = 0; i < PERF_AUXTRACE_ERROR_MAX; i++) { 1659 if (!stats->nr_auxtrace_errors[i]) 1660 continue; 1661 ui__warning("%u %s errors\n", 1662 stats->nr_auxtrace_errors[i], 1663 auxtrace_error_name(i)); 1664 } 1665 } 1666 1667 int perf_event__process_auxtrace_error(struct perf_session *session, 1668 union perf_event *event) 1669 { 1670 if (auxtrace__dont_decode(session)) 1671 return 0; 1672 1673 perf_event__fprintf_auxtrace_error(event, stdout); 1674 return 0; 1675 } 1676 1677 static int __auxtrace_mmap__read(struct mmap *map, 1678 struct auxtrace_record *itr, 1679 struct perf_tool *tool, process_auxtrace_t fn, 1680 bool snapshot, size_t snapshot_size) 1681 { 1682 struct auxtrace_mmap *mm = &map->auxtrace_mmap; 1683 u64 head, old = mm->prev, offset, ref; 1684 unsigned char *data = mm->base; 1685 size_t size, head_off, old_off, len1, len2, padding; 1686 union perf_event ev; 1687 void *data1, *data2; 1688 1689 if (snapshot) { 1690 head = auxtrace_mmap__read_snapshot_head(mm); 1691 if (auxtrace_record__find_snapshot(itr, mm->idx, mm, data, 1692 &head, &old)) 1693 return -1; 1694 } else { 1695 head = auxtrace_mmap__read_head(mm); 1696 } 1697 1698 if (old == head) 1699 return 0; 1700 1701 pr_debug3("auxtrace idx %d old %#"PRIx64" head %#"PRIx64" diff %#"PRIx64"\n", 1702 mm->idx, old, head, head - old); 1703 1704 if (mm->mask) { 1705 head_off = head & mm->mask; 1706 old_off = old & mm->mask; 1707 } else { 1708 head_off = head % mm->len; 1709 old_off = old % mm->len; 1710 } 1711 1712 if (head_off > old_off) 1713 size = head_off - old_off; 1714 else 1715 size = mm->len - (old_off - head_off); 1716 1717 if (snapshot && size > snapshot_size) 1718 size = snapshot_size; 1719 1720 ref = auxtrace_record__reference(itr); 1721 1722 if (head > old || size <= head || mm->mask) { 1723 offset = head - size; 1724 } else { 1725 /* 1726 * When the buffer size is not a power of 2, 'head' wraps at the 1727 * highest multiple of the buffer size, so we have to subtract 1728 * the remainder here. 1729 */ 1730 u64 rem = (0ULL - mm->len) % mm->len; 1731 1732 offset = head - size - rem; 1733 } 1734 1735 if (size > head_off) { 1736 len1 = size - head_off; 1737 data1 = &data[mm->len - len1]; 1738 len2 = head_off; 1739 data2 = &data[0]; 1740 } else { 1741 len1 = size; 1742 data1 = &data[head_off - len1]; 1743 len2 = 0; 1744 data2 = NULL; 1745 } 1746 1747 if (itr->alignment) { 1748 unsigned int unwanted = len1 % itr->alignment; 1749 1750 len1 -= unwanted; 1751 size -= unwanted; 1752 } 1753 1754 /* padding must be written by fn() e.g. record__process_auxtrace() */ 1755 padding = size & (PERF_AUXTRACE_RECORD_ALIGNMENT - 1); 1756 if (padding) 1757 padding = PERF_AUXTRACE_RECORD_ALIGNMENT - padding; 1758 1759 memset(&ev, 0, sizeof(ev)); 1760 ev.auxtrace.header.type = PERF_RECORD_AUXTRACE; 1761 ev.auxtrace.header.size = sizeof(ev.auxtrace); 1762 ev.auxtrace.size = size + padding; 1763 ev.auxtrace.offset = offset; 1764 ev.auxtrace.reference = ref; 1765 ev.auxtrace.idx = mm->idx; 1766 ev.auxtrace.tid = mm->tid; 1767 ev.auxtrace.cpu = mm->cpu; 1768 1769 if (fn(tool, map, &ev, data1, len1, data2, len2)) 1770 return -1; 1771 1772 mm->prev = head; 1773 1774 if (!snapshot) { 1775 auxtrace_mmap__write_tail(mm, head); 1776 if (itr->read_finish) { 1777 int err; 1778 1779 err = itr->read_finish(itr, mm->idx); 1780 if (err < 0) 1781 return err; 1782 } 1783 } 1784 1785 return 1; 1786 } 1787 1788 int auxtrace_mmap__read(struct mmap *map, struct auxtrace_record *itr, 1789 struct perf_tool *tool, process_auxtrace_t fn) 1790 { 1791 return __auxtrace_mmap__read(map, itr, tool, fn, false, 0); 1792 } 1793 1794 int auxtrace_mmap__read_snapshot(struct mmap *map, 1795 struct auxtrace_record *itr, 1796 struct perf_tool *tool, process_auxtrace_t fn, 1797 size_t snapshot_size) 1798 { 1799 return __auxtrace_mmap__read(map, itr, tool, fn, true, snapshot_size); 1800 } 1801 1802 /** 1803 * struct auxtrace_cache - hash table to implement a cache 1804 * @hashtable: the hashtable 1805 * @sz: hashtable size (number of hlists) 1806 * @entry_size: size of an entry 1807 * @limit: limit the number of entries to this maximum, when reached the cache 1808 * is dropped and caching begins again with an empty cache 1809 * @cnt: current number of entries 1810 * @bits: hashtable size (@sz = 2^@bits) 1811 */ 1812 struct auxtrace_cache { 1813 struct hlist_head *hashtable; 1814 size_t sz; 1815 size_t entry_size; 1816 size_t limit; 1817 size_t cnt; 1818 unsigned int bits; 1819 }; 1820 1821 struct auxtrace_cache *auxtrace_cache__new(unsigned int bits, size_t entry_size, 1822 unsigned int limit_percent) 1823 { 1824 struct auxtrace_cache *c; 1825 struct hlist_head *ht; 1826 size_t sz, i; 1827 1828 c = zalloc(sizeof(struct auxtrace_cache)); 1829 if (!c) 1830 return NULL; 1831 1832 sz = 1UL << bits; 1833 1834 ht = calloc(sz, sizeof(struct hlist_head)); 1835 if (!ht) 1836 goto out_free; 1837 1838 for (i = 0; i < sz; i++) 1839 INIT_HLIST_HEAD(&ht[i]); 1840 1841 c->hashtable = ht; 1842 c->sz = sz; 1843 c->entry_size = entry_size; 1844 c->limit = (c->sz * limit_percent) / 100; 1845 c->bits = bits; 1846 1847 return c; 1848 1849 out_free: 1850 free(c); 1851 return NULL; 1852 } 1853 1854 static void auxtrace_cache__drop(struct auxtrace_cache *c) 1855 { 1856 struct auxtrace_cache_entry *entry; 1857 struct hlist_node *tmp; 1858 size_t i; 1859 1860 if (!c) 1861 return; 1862 1863 for (i = 0; i < c->sz; i++) { 1864 hlist_for_each_entry_safe(entry, tmp, &c->hashtable[i], hash) { 1865 hlist_del(&entry->hash); 1866 auxtrace_cache__free_entry(c, entry); 1867 } 1868 } 1869 1870 c->cnt = 0; 1871 } 1872 1873 void auxtrace_cache__free(struct auxtrace_cache *c) 1874 { 1875 if (!c) 1876 return; 1877 1878 auxtrace_cache__drop(c); 1879 zfree(&c->hashtable); 1880 free(c); 1881 } 1882 1883 void *auxtrace_cache__alloc_entry(struct auxtrace_cache *c) 1884 { 1885 return malloc(c->entry_size); 1886 } 1887 1888 void auxtrace_cache__free_entry(struct auxtrace_cache *c __maybe_unused, 1889 void *entry) 1890 { 1891 free(entry); 1892 } 1893 1894 int auxtrace_cache__add(struct auxtrace_cache *c, u32 key, 1895 struct auxtrace_cache_entry *entry) 1896 { 1897 if (c->limit && ++c->cnt > c->limit) 1898 auxtrace_cache__drop(c); 1899 1900 entry->key = key; 1901 hlist_add_head(&entry->hash, &c->hashtable[hash_32(key, c->bits)]); 1902 1903 return 0; 1904 } 1905 1906 static struct auxtrace_cache_entry *auxtrace_cache__rm(struct auxtrace_cache *c, 1907 u32 key) 1908 { 1909 struct auxtrace_cache_entry *entry; 1910 struct hlist_head *hlist; 1911 struct hlist_node *n; 1912 1913 if (!c) 1914 return NULL; 1915 1916 hlist = &c->hashtable[hash_32(key, c->bits)]; 1917 hlist_for_each_entry_safe(entry, n, hlist, hash) { 1918 if (entry->key == key) { 1919 hlist_del(&entry->hash); 1920 return entry; 1921 } 1922 } 1923 1924 return NULL; 1925 } 1926 1927 void auxtrace_cache__remove(struct auxtrace_cache *c, u32 key) 1928 { 1929 struct auxtrace_cache_entry *entry = auxtrace_cache__rm(c, key); 1930 1931 auxtrace_cache__free_entry(c, entry); 1932 } 1933 1934 void *auxtrace_cache__lookup(struct auxtrace_cache *c, u32 key) 1935 { 1936 struct auxtrace_cache_entry *entry; 1937 struct hlist_head *hlist; 1938 1939 if (!c) 1940 return NULL; 1941 1942 hlist = &c->hashtable[hash_32(key, c->bits)]; 1943 hlist_for_each_entry(entry, hlist, hash) { 1944 if (entry->key == key) 1945 return entry; 1946 } 1947 1948 return NULL; 1949 } 1950 1951 static void addr_filter__free_str(struct addr_filter *filt) 1952 { 1953 zfree(&filt->str); 1954 filt->action = NULL; 1955 filt->sym_from = NULL; 1956 filt->sym_to = NULL; 1957 filt->filename = NULL; 1958 } 1959 1960 static struct addr_filter *addr_filter__new(void) 1961 { 1962 struct addr_filter *filt = zalloc(sizeof(*filt)); 1963 1964 if (filt) 1965 INIT_LIST_HEAD(&filt->list); 1966 1967 return filt; 1968 } 1969 1970 static void addr_filter__free(struct addr_filter *filt) 1971 { 1972 if (filt) 1973 addr_filter__free_str(filt); 1974 free(filt); 1975 } 1976 1977 static void addr_filters__add(struct addr_filters *filts, 1978 struct addr_filter *filt) 1979 { 1980 list_add_tail(&filt->list, &filts->head); 1981 filts->cnt += 1; 1982 } 1983 1984 static void addr_filters__del(struct addr_filters *filts, 1985 struct addr_filter *filt) 1986 { 1987 list_del_init(&filt->list); 1988 filts->cnt -= 1; 1989 } 1990 1991 void addr_filters__init(struct addr_filters *filts) 1992 { 1993 INIT_LIST_HEAD(&filts->head); 1994 filts->cnt = 0; 1995 } 1996 1997 void addr_filters__exit(struct addr_filters *filts) 1998 { 1999 struct addr_filter *filt, *n; 2000 2001 list_for_each_entry_safe(filt, n, &filts->head, list) { 2002 addr_filters__del(filts, filt); 2003 addr_filter__free(filt); 2004 } 2005 } 2006 2007 static int parse_num_or_str(char **inp, u64 *num, const char **str, 2008 const char *str_delim) 2009 { 2010 *inp += strspn(*inp, " "); 2011 2012 if (isdigit(**inp)) { 2013 char *endptr; 2014 2015 if (!num) 2016 return -EINVAL; 2017 errno = 0; 2018 *num = strtoull(*inp, &endptr, 0); 2019 if (errno) 2020 return -errno; 2021 if (endptr == *inp) 2022 return -EINVAL; 2023 *inp = endptr; 2024 } else { 2025 size_t n; 2026 2027 if (!str) 2028 return -EINVAL; 2029 *inp += strspn(*inp, " "); 2030 *str = *inp; 2031 n = strcspn(*inp, str_delim); 2032 if (!n) 2033 return -EINVAL; 2034 *inp += n; 2035 if (**inp) { 2036 **inp = '\0'; 2037 *inp += 1; 2038 } 2039 } 2040 return 0; 2041 } 2042 2043 static int parse_action(struct addr_filter *filt) 2044 { 2045 if (!strcmp(filt->action, "filter")) { 2046 filt->start = true; 2047 filt->range = true; 2048 } else if (!strcmp(filt->action, "start")) { 2049 filt->start = true; 2050 } else if (!strcmp(filt->action, "stop")) { 2051 filt->start = false; 2052 } else if (!strcmp(filt->action, "tracestop")) { 2053 filt->start = false; 2054 filt->range = true; 2055 filt->action += 5; /* Change 'tracestop' to 'stop' */ 2056 } else { 2057 return -EINVAL; 2058 } 2059 return 0; 2060 } 2061 2062 static int parse_sym_idx(char **inp, int *idx) 2063 { 2064 *idx = -1; 2065 2066 *inp += strspn(*inp, " "); 2067 2068 if (**inp != '#') 2069 return 0; 2070 2071 *inp += 1; 2072 2073 if (**inp == 'g' || **inp == 'G') { 2074 *inp += 1; 2075 *idx = 0; 2076 } else { 2077 unsigned long num; 2078 char *endptr; 2079 2080 errno = 0; 2081 num = strtoul(*inp, &endptr, 0); 2082 if (errno) 2083 return -errno; 2084 if (endptr == *inp || num > INT_MAX) 2085 return -EINVAL; 2086 *inp = endptr; 2087 *idx = num; 2088 } 2089 2090 return 0; 2091 } 2092 2093 static int parse_addr_size(char **inp, u64 *num, const char **str, int *idx) 2094 { 2095 int err = parse_num_or_str(inp, num, str, " "); 2096 2097 if (!err && *str) 2098 err = parse_sym_idx(inp, idx); 2099 2100 return err; 2101 } 2102 2103 static int parse_one_filter(struct addr_filter *filt, const char **filter_inp) 2104 { 2105 char *fstr; 2106 int err; 2107 2108 filt->str = fstr = strdup(*filter_inp); 2109 if (!fstr) 2110 return -ENOMEM; 2111 2112 err = parse_num_or_str(&fstr, NULL, &filt->action, " "); 2113 if (err) 2114 goto out_err; 2115 2116 err = parse_action(filt); 2117 if (err) 2118 goto out_err; 2119 2120 err = parse_addr_size(&fstr, &filt->addr, &filt->sym_from, 2121 &filt->sym_from_idx); 2122 if (err) 2123 goto out_err; 2124 2125 fstr += strspn(fstr, " "); 2126 2127 if (*fstr == '/') { 2128 fstr += 1; 2129 err = parse_addr_size(&fstr, &filt->size, &filt->sym_to, 2130 &filt->sym_to_idx); 2131 if (err) 2132 goto out_err; 2133 filt->range = true; 2134 } 2135 2136 fstr += strspn(fstr, " "); 2137 2138 if (*fstr == '@') { 2139 fstr += 1; 2140 err = parse_num_or_str(&fstr, NULL, &filt->filename, " ,"); 2141 if (err) 2142 goto out_err; 2143 } 2144 2145 fstr += strspn(fstr, " ,"); 2146 2147 *filter_inp += fstr - filt->str; 2148 2149 return 0; 2150 2151 out_err: 2152 addr_filter__free_str(filt); 2153 2154 return err; 2155 } 2156 2157 int addr_filters__parse_bare_filter(struct addr_filters *filts, 2158 const char *filter) 2159 { 2160 struct addr_filter *filt; 2161 const char *fstr = filter; 2162 int err; 2163 2164 while (*fstr) { 2165 filt = addr_filter__new(); 2166 err = parse_one_filter(filt, &fstr); 2167 if (err) { 2168 addr_filter__free(filt); 2169 addr_filters__exit(filts); 2170 return err; 2171 } 2172 addr_filters__add(filts, filt); 2173 } 2174 2175 return 0; 2176 } 2177 2178 struct sym_args { 2179 const char *name; 2180 u64 start; 2181 u64 size; 2182 int idx; 2183 int cnt; 2184 bool started; 2185 bool global; 2186 bool selected; 2187 bool duplicate; 2188 bool near; 2189 }; 2190 2191 static bool kern_sym_match(struct sym_args *args, const char *name, char type) 2192 { 2193 /* A function with the same name, and global or the n'th found or any */ 2194 return kallsyms__is_function(type) && 2195 !strcmp(name, args->name) && 2196 ((args->global && isupper(type)) || 2197 (args->selected && ++(args->cnt) == args->idx) || 2198 (!args->global && !args->selected)); 2199 } 2200 2201 static int find_kern_sym_cb(void *arg, const char *name, char type, u64 start) 2202 { 2203 struct sym_args *args = arg; 2204 2205 if (args->started) { 2206 if (!args->size) 2207 args->size = start - args->start; 2208 if (args->selected) { 2209 if (args->size) 2210 return 1; 2211 } else if (kern_sym_match(args, name, type)) { 2212 args->duplicate = true; 2213 return 1; 2214 } 2215 } else if (kern_sym_match(args, name, type)) { 2216 args->started = true; 2217 args->start = start; 2218 } 2219 2220 return 0; 2221 } 2222 2223 static int print_kern_sym_cb(void *arg, const char *name, char type, u64 start) 2224 { 2225 struct sym_args *args = arg; 2226 2227 if (kern_sym_match(args, name, type)) { 2228 pr_err("#%d\t0x%"PRIx64"\t%c\t%s\n", 2229 ++args->cnt, start, type, name); 2230 args->near = true; 2231 } else if (args->near) { 2232 args->near = false; 2233 pr_err("\t\twhich is near\t\t%s\n", name); 2234 } 2235 2236 return 0; 2237 } 2238 2239 static int sym_not_found_error(const char *sym_name, int idx) 2240 { 2241 if (idx > 0) { 2242 pr_err("N'th occurrence (N=%d) of symbol '%s' not found.\n", 2243 idx, sym_name); 2244 } else if (!idx) { 2245 pr_err("Global symbol '%s' not found.\n", sym_name); 2246 } else { 2247 pr_err("Symbol '%s' not found.\n", sym_name); 2248 } 2249 pr_err("Note that symbols must be functions.\n"); 2250 2251 return -EINVAL; 2252 } 2253 2254 static int find_kern_sym(const char *sym_name, u64 *start, u64 *size, int idx) 2255 { 2256 struct sym_args args = { 2257 .name = sym_name, 2258 .idx = idx, 2259 .global = !idx, 2260 .selected = idx > 0, 2261 }; 2262 int err; 2263 2264 *start = 0; 2265 *size = 0; 2266 2267 err = kallsyms__parse("/proc/kallsyms", &args, find_kern_sym_cb); 2268 if (err < 0) { 2269 pr_err("Failed to parse /proc/kallsyms\n"); 2270 return err; 2271 } 2272 2273 if (args.duplicate) { 2274 pr_err("Multiple kernel symbols with name '%s'\n", sym_name); 2275 args.cnt = 0; 2276 kallsyms__parse("/proc/kallsyms", &args, print_kern_sym_cb); 2277 pr_err("Disambiguate symbol name by inserting #n after the name e.g. %s #2\n", 2278 sym_name); 2279 pr_err("Or select a global symbol by inserting #0 or #g or #G\n"); 2280 return -EINVAL; 2281 } 2282 2283 if (!args.started) { 2284 pr_err("Kernel symbol lookup: "); 2285 return sym_not_found_error(sym_name, idx); 2286 } 2287 2288 *start = args.start; 2289 *size = args.size; 2290 2291 return 0; 2292 } 2293 2294 static int find_entire_kern_cb(void *arg, const char *name __maybe_unused, 2295 char type, u64 start) 2296 { 2297 struct sym_args *args = arg; 2298 2299 if (!kallsyms__is_function(type)) 2300 return 0; 2301 2302 if (!args->started) { 2303 args->started = true; 2304 args->start = start; 2305 } 2306 /* Don't know exactly where the kernel ends, so we add a page */ 2307 args->size = round_up(start, page_size) + page_size - args->start; 2308 2309 return 0; 2310 } 2311 2312 static int addr_filter__entire_kernel(struct addr_filter *filt) 2313 { 2314 struct sym_args args = { .started = false }; 2315 int err; 2316 2317 err = kallsyms__parse("/proc/kallsyms", &args, find_entire_kern_cb); 2318 if (err < 0 || !args.started) { 2319 pr_err("Failed to parse /proc/kallsyms\n"); 2320 return err; 2321 } 2322 2323 filt->addr = args.start; 2324 filt->size = args.size; 2325 2326 return 0; 2327 } 2328 2329 static int check_end_after_start(struct addr_filter *filt, u64 start, u64 size) 2330 { 2331 if (start + size >= filt->addr) 2332 return 0; 2333 2334 if (filt->sym_from) { 2335 pr_err("Symbol '%s' (0x%"PRIx64") comes before '%s' (0x%"PRIx64")\n", 2336 filt->sym_to, start, filt->sym_from, filt->addr); 2337 } else { 2338 pr_err("Symbol '%s' (0x%"PRIx64") comes before address 0x%"PRIx64")\n", 2339 filt->sym_to, start, filt->addr); 2340 } 2341 2342 return -EINVAL; 2343 } 2344 2345 static int addr_filter__resolve_kernel_syms(struct addr_filter *filt) 2346 { 2347 bool no_size = false; 2348 u64 start, size; 2349 int err; 2350 2351 if (symbol_conf.kptr_restrict) { 2352 pr_err("Kernel addresses are restricted. Unable to resolve kernel symbols.\n"); 2353 return -EINVAL; 2354 } 2355 2356 if (filt->sym_from && !strcmp(filt->sym_from, "*")) 2357 return addr_filter__entire_kernel(filt); 2358 2359 if (filt->sym_from) { 2360 err = find_kern_sym(filt->sym_from, &start, &size, 2361 filt->sym_from_idx); 2362 if (err) 2363 return err; 2364 filt->addr = start; 2365 if (filt->range && !filt->size && !filt->sym_to) { 2366 filt->size = size; 2367 no_size = !size; 2368 } 2369 } 2370 2371 if (filt->sym_to) { 2372 err = find_kern_sym(filt->sym_to, &start, &size, 2373 filt->sym_to_idx); 2374 if (err) 2375 return err; 2376 2377 err = check_end_after_start(filt, start, size); 2378 if (err) 2379 return err; 2380 filt->size = start + size - filt->addr; 2381 no_size = !size; 2382 } 2383 2384 /* The very last symbol in kallsyms does not imply a particular size */ 2385 if (no_size) { 2386 pr_err("Cannot determine size of symbol '%s'\n", 2387 filt->sym_to ? filt->sym_to : filt->sym_from); 2388 return -EINVAL; 2389 } 2390 2391 return 0; 2392 } 2393 2394 static struct dso *load_dso(const char *name) 2395 { 2396 struct map *map; 2397 struct dso *dso; 2398 2399 map = dso__new_map(name); 2400 if (!map) 2401 return NULL; 2402 2403 if (map__load(map) < 0) 2404 pr_err("File '%s' not found or has no symbols.\n", name); 2405 2406 dso = dso__get(map->dso); 2407 2408 map__put(map); 2409 2410 return dso; 2411 } 2412 2413 static bool dso_sym_match(struct symbol *sym, const char *name, int *cnt, 2414 int idx) 2415 { 2416 /* Same name, and global or the n'th found or any */ 2417 return !arch__compare_symbol_names(name, sym->name) && 2418 ((!idx && sym->binding == STB_GLOBAL) || 2419 (idx > 0 && ++*cnt == idx) || 2420 idx < 0); 2421 } 2422 2423 static void print_duplicate_syms(struct dso *dso, const char *sym_name) 2424 { 2425 struct symbol *sym; 2426 bool near = false; 2427 int cnt = 0; 2428 2429 pr_err("Multiple symbols with name '%s'\n", sym_name); 2430 2431 sym = dso__first_symbol(dso); 2432 while (sym) { 2433 if (dso_sym_match(sym, sym_name, &cnt, -1)) { 2434 pr_err("#%d\t0x%"PRIx64"\t%c\t%s\n", 2435 ++cnt, sym->start, 2436 sym->binding == STB_GLOBAL ? 'g' : 2437 sym->binding == STB_LOCAL ? 'l' : 'w', 2438 sym->name); 2439 near = true; 2440 } else if (near) { 2441 near = false; 2442 pr_err("\t\twhich is near\t\t%s\n", sym->name); 2443 } 2444 sym = dso__next_symbol(sym); 2445 } 2446 2447 pr_err("Disambiguate symbol name by inserting #n after the name e.g. %s #2\n", 2448 sym_name); 2449 pr_err("Or select a global symbol by inserting #0 or #g or #G\n"); 2450 } 2451 2452 static int find_dso_sym(struct dso *dso, const char *sym_name, u64 *start, 2453 u64 *size, int idx) 2454 { 2455 struct symbol *sym; 2456 int cnt = 0; 2457 2458 *start = 0; 2459 *size = 0; 2460 2461 sym = dso__first_symbol(dso); 2462 while (sym) { 2463 if (*start) { 2464 if (!*size) 2465 *size = sym->start - *start; 2466 if (idx > 0) { 2467 if (*size) 2468 return 1; 2469 } else if (dso_sym_match(sym, sym_name, &cnt, idx)) { 2470 print_duplicate_syms(dso, sym_name); 2471 return -EINVAL; 2472 } 2473 } else if (dso_sym_match(sym, sym_name, &cnt, idx)) { 2474 *start = sym->start; 2475 *size = sym->end - sym->start; 2476 } 2477 sym = dso__next_symbol(sym); 2478 } 2479 2480 if (!*start) 2481 return sym_not_found_error(sym_name, idx); 2482 2483 return 0; 2484 } 2485 2486 static int addr_filter__entire_dso(struct addr_filter *filt, struct dso *dso) 2487 { 2488 if (dso__data_file_size(dso, NULL)) { 2489 pr_err("Failed to determine filter for %s\nCannot determine file size.\n", 2490 filt->filename); 2491 return -EINVAL; 2492 } 2493 2494 filt->addr = 0; 2495 filt->size = dso->data.file_size; 2496 2497 return 0; 2498 } 2499 2500 static int addr_filter__resolve_syms(struct addr_filter *filt) 2501 { 2502 u64 start, size; 2503 struct dso *dso; 2504 int err = 0; 2505 2506 if (!filt->sym_from && !filt->sym_to) 2507 return 0; 2508 2509 if (!filt->filename) 2510 return addr_filter__resolve_kernel_syms(filt); 2511 2512 dso = load_dso(filt->filename); 2513 if (!dso) { 2514 pr_err("Failed to load symbols from: %s\n", filt->filename); 2515 return -EINVAL; 2516 } 2517 2518 if (filt->sym_from && !strcmp(filt->sym_from, "*")) { 2519 err = addr_filter__entire_dso(filt, dso); 2520 goto put_dso; 2521 } 2522 2523 if (filt->sym_from) { 2524 err = find_dso_sym(dso, filt->sym_from, &start, &size, 2525 filt->sym_from_idx); 2526 if (err) 2527 goto put_dso; 2528 filt->addr = start; 2529 if (filt->range && !filt->size && !filt->sym_to) 2530 filt->size = size; 2531 } 2532 2533 if (filt->sym_to) { 2534 err = find_dso_sym(dso, filt->sym_to, &start, &size, 2535 filt->sym_to_idx); 2536 if (err) 2537 goto put_dso; 2538 2539 err = check_end_after_start(filt, start, size); 2540 if (err) 2541 return err; 2542 2543 filt->size = start + size - filt->addr; 2544 } 2545 2546 put_dso: 2547 dso__put(dso); 2548 2549 return err; 2550 } 2551 2552 static char *addr_filter__to_str(struct addr_filter *filt) 2553 { 2554 char filename_buf[PATH_MAX]; 2555 const char *at = ""; 2556 const char *fn = ""; 2557 char *filter; 2558 int err; 2559 2560 if (filt->filename) { 2561 at = "@"; 2562 fn = realpath(filt->filename, filename_buf); 2563 if (!fn) 2564 return NULL; 2565 } 2566 2567 if (filt->range) { 2568 err = asprintf(&filter, "%s 0x%"PRIx64"/0x%"PRIx64"%s%s", 2569 filt->action, filt->addr, filt->size, at, fn); 2570 } else { 2571 err = asprintf(&filter, "%s 0x%"PRIx64"%s%s", 2572 filt->action, filt->addr, at, fn); 2573 } 2574 2575 return err < 0 ? NULL : filter; 2576 } 2577 2578 static int parse_addr_filter(struct evsel *evsel, const char *filter, 2579 int max_nr) 2580 { 2581 struct addr_filters filts; 2582 struct addr_filter *filt; 2583 int err; 2584 2585 addr_filters__init(&filts); 2586 2587 err = addr_filters__parse_bare_filter(&filts, filter); 2588 if (err) 2589 goto out_exit; 2590 2591 if (filts.cnt > max_nr) { 2592 pr_err("Error: number of address filters (%d) exceeds maximum (%d)\n", 2593 filts.cnt, max_nr); 2594 err = -EINVAL; 2595 goto out_exit; 2596 } 2597 2598 list_for_each_entry(filt, &filts.head, list) { 2599 char *new_filter; 2600 2601 err = addr_filter__resolve_syms(filt); 2602 if (err) 2603 goto out_exit; 2604 2605 new_filter = addr_filter__to_str(filt); 2606 if (!new_filter) { 2607 err = -ENOMEM; 2608 goto out_exit; 2609 } 2610 2611 if (evsel__append_addr_filter(evsel, new_filter)) { 2612 err = -ENOMEM; 2613 goto out_exit; 2614 } 2615 } 2616 2617 out_exit: 2618 addr_filters__exit(&filts); 2619 2620 if (err) { 2621 pr_err("Failed to parse address filter: '%s'\n", filter); 2622 pr_err("Filter format is: filter|start|stop|tracestop <start symbol or address> [/ <end symbol or size>] [@<file name>]\n"); 2623 pr_err("Where multiple filters are separated by space or comma.\n"); 2624 } 2625 2626 return err; 2627 } 2628 2629 static int evsel__nr_addr_filter(struct evsel *evsel) 2630 { 2631 struct perf_pmu *pmu = evsel__find_pmu(evsel); 2632 int nr_addr_filters = 0; 2633 2634 if (!pmu) 2635 return 0; 2636 2637 perf_pmu__scan_file(pmu, "nr_addr_filters", "%d", &nr_addr_filters); 2638 2639 return nr_addr_filters; 2640 } 2641 2642 int auxtrace_parse_filters(struct evlist *evlist) 2643 { 2644 struct evsel *evsel; 2645 char *filter; 2646 int err, max_nr; 2647 2648 evlist__for_each_entry(evlist, evsel) { 2649 filter = evsel->filter; 2650 max_nr = evsel__nr_addr_filter(evsel); 2651 if (!filter || !max_nr) 2652 continue; 2653 evsel->filter = NULL; 2654 err = parse_addr_filter(evsel, filter, max_nr); 2655 free(filter); 2656 if (err) 2657 return err; 2658 pr_debug("Address filter: %s\n", evsel->filter); 2659 } 2660 2661 return 0; 2662 } 2663 2664 int auxtrace__process_event(struct perf_session *session, union perf_event *event, 2665 struct perf_sample *sample, struct perf_tool *tool) 2666 { 2667 if (!session->auxtrace) 2668 return 0; 2669 2670 return session->auxtrace->process_event(session, event, sample, tool); 2671 } 2672 2673 void auxtrace__dump_auxtrace_sample(struct perf_session *session, 2674 struct perf_sample *sample) 2675 { 2676 if (!session->auxtrace || !session->auxtrace->dump_auxtrace_sample || 2677 auxtrace__dont_decode(session)) 2678 return; 2679 2680 session->auxtrace->dump_auxtrace_sample(session, sample); 2681 } 2682 2683 int auxtrace__flush_events(struct perf_session *session, struct perf_tool *tool) 2684 { 2685 if (!session->auxtrace) 2686 return 0; 2687 2688 return session->auxtrace->flush_events(session, tool); 2689 } 2690 2691 void auxtrace__free_events(struct perf_session *session) 2692 { 2693 if (!session->auxtrace) 2694 return; 2695 2696 return session->auxtrace->free_events(session); 2697 } 2698 2699 void auxtrace__free(struct perf_session *session) 2700 { 2701 if (!session->auxtrace) 2702 return; 2703 2704 return session->auxtrace->free(session); 2705 } 2706 2707 bool auxtrace__evsel_is_auxtrace(struct perf_session *session, 2708 struct evsel *evsel) 2709 { 2710 if (!session->auxtrace || !session->auxtrace->evsel_is_auxtrace) 2711 return false; 2712 2713 return session->auxtrace->evsel_is_auxtrace(session, evsel); 2714 } 2715