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 */ 65static int perf_evlist__regroup(struct evlist *evlist, 66 struct evsel *leader, 67 struct evsel *last) 68{ 69 struct evsel *evsel; 70 bool grp; 71 72 if (!evsel__is_group_leader(leader)) 73 return -EINVAL; 74 75 grp = false; 76 evlist__for_each_entry(evlist, evsel) { 77 if (grp) { 78 if (!(evsel->leader == leader || 79 (evsel->leader == evsel && 80 evsel->core.nr_members <= 1))) 81 return -EINVAL; 82 } else if (evsel == leader) { 83 grp = true; 84 } 85 if (evsel == last) 86 break; 87 } 88 89 grp = false; 90 evlist__for_each_entry(evlist, evsel) { 91 if (grp) { 92 if (evsel->leader != leader) { 93 evsel->leader = leader; 94 if (leader->core.nr_members < 1) 95 leader->core.nr_members = 1; 96 leader->core.nr_members += 1; 97 } 98 } else if (evsel == leader) { 99 grp = true; 100 } 101 if (evsel == last) 102 break; 103 } 104 105 return 0; 106} 107 108static bool auxtrace__dont_decode(struct perf_session *session) 109{ 110 return !session->itrace_synth_opts || 111 session->itrace_synth_opts->dont_decode; 112} 113 114int auxtrace_mmap__mmap(struct auxtrace_mmap *mm, 115 struct auxtrace_mmap_params *mp, 116 void *userpg, int fd) 117{ 118 struct perf_event_mmap_page *pc = userpg; 119 120 WARN_ONCE(mm->base, "Uninitialized auxtrace_mmap\n"); 121 122 mm->userpg = userpg; 123 mm->mask = mp->mask; 124 mm->len = mp->len; 125 mm->prev = 0; 126 mm->idx = mp->idx; 127 mm->tid = mp->tid; 128 mm->cpu = mp->cpu; 129 130 if (!mp->len) { 131 mm->base = NULL; 132 return 0; 133 } 134 135#if BITS_PER_LONG != 64 && !defined(HAVE_SYNC_COMPARE_AND_SWAP_SUPPORT) 136 pr_err("Cannot use AUX area tracing mmaps\n"); 137 return -1; 138#endif 139 140 pc->aux_offset = mp->offset; 141 pc->aux_size = mp->len; 142 143 mm->base = mmap(NULL, mp->len, mp->prot, MAP_SHARED, fd, mp->offset); 144 if (mm->base == MAP_FAILED) { 145 pr_debug2("failed to mmap AUX area\n"); 146 mm->base = NULL; 147 return -1; 148 } 149 150 return 0; 151} 152 153void auxtrace_mmap__munmap(struct auxtrace_mmap *mm) 154{ 155 if (mm->base) { 156 munmap(mm->base, mm->len); 157 mm->base = NULL; 158 } 159} 160 161void auxtrace_mmap_params__init(struct auxtrace_mmap_params *mp, 162 off_t auxtrace_offset, 163 unsigned int auxtrace_pages, 164 bool auxtrace_overwrite) 165{ 166 if (auxtrace_pages) { 167 mp->offset = auxtrace_offset; 168 mp->len = auxtrace_pages * (size_t)page_size; 169 mp->mask = is_power_of_2(mp->len) ? mp->len - 1 : 0; 170 mp->prot = PROT_READ | (auxtrace_overwrite ? 0 : PROT_WRITE); 171 pr_debug2("AUX area mmap length %zu\n", mp->len); 172 } else { 173 mp->len = 0; 174 } 175} 176 177void auxtrace_mmap_params__set_idx(struct auxtrace_mmap_params *mp, 178 struct evlist *evlist, int idx, 179 bool per_cpu) 180{ 181 mp->idx = idx; 182 183 if (per_cpu) { 184 mp->cpu = evlist->core.cpus->map[idx]; 185 if (evlist->core.threads) 186 mp->tid = perf_thread_map__pid(evlist->core.threads, 0); 187 else 188 mp->tid = -1; 189 } else { 190 mp->cpu = -1; 191 mp->tid = perf_thread_map__pid(evlist->core.threads, idx); 192 } 193} 194 195#define AUXTRACE_INIT_NR_QUEUES 32 196 197static struct auxtrace_queue *auxtrace_alloc_queue_array(unsigned int nr_queues) 198{ 199 struct auxtrace_queue *queue_array; 200 unsigned int max_nr_queues, i; 201 202 max_nr_queues = UINT_MAX / sizeof(struct auxtrace_queue); 203 if (nr_queues > max_nr_queues) 204 return NULL; 205 206 queue_array = calloc(nr_queues, sizeof(struct auxtrace_queue)); 207 if (!queue_array) 208 return NULL; 209 210 for (i = 0; i < nr_queues; i++) { 211 INIT_LIST_HEAD(&queue_array[i].head); 212 queue_array[i].priv = NULL; 213 } 214 215 return queue_array; 216} 217 218int auxtrace_queues__init(struct auxtrace_queues *queues) 219{ 220 queues->nr_queues = AUXTRACE_INIT_NR_QUEUES; 221 queues->queue_array = auxtrace_alloc_queue_array(queues->nr_queues); 222 if (!queues->queue_array) 223 return -ENOMEM; 224 return 0; 225} 226 227static int auxtrace_queues__grow(struct auxtrace_queues *queues, 228 unsigned int new_nr_queues) 229{ 230 unsigned int nr_queues = queues->nr_queues; 231 struct auxtrace_queue *queue_array; 232 unsigned int i; 233 234 if (!nr_queues) 235 nr_queues = AUXTRACE_INIT_NR_QUEUES; 236 237 while (nr_queues && nr_queues < new_nr_queues) 238 nr_queues <<= 1; 239 240 if (nr_queues < queues->nr_queues || nr_queues < new_nr_queues) 241 return -EINVAL; 242 243 queue_array = auxtrace_alloc_queue_array(nr_queues); 244 if (!queue_array) 245 return -ENOMEM; 246 247 for (i = 0; i < queues->nr_queues; i++) { 248 list_splice_tail(&queues->queue_array[i].head, 249 &queue_array[i].head); 250 queue_array[i].tid = queues->queue_array[i].tid; 251 queue_array[i].cpu = queues->queue_array[i].cpu; 252 queue_array[i].set = queues->queue_array[i].set; 253 queue_array[i].priv = queues->queue_array[i].priv; 254 } 255 256 queues->nr_queues = nr_queues; 257 queues->queue_array = queue_array; 258 259 return 0; 260} 261 262static void *auxtrace_copy_data(u64 size, struct perf_session *session) 263{ 264 int fd = perf_data__fd(session->data); 265 void *p; 266 ssize_t ret; 267 268 if (size > SSIZE_MAX) 269 return NULL; 270 271 p = malloc(size); 272 if (!p) 273 return NULL; 274 275 ret = readn(fd, p, size); 276 if (ret != (ssize_t)size) { 277 free(p); 278 return NULL; 279 } 280 281 return p; 282} 283 284static int auxtrace_queues__queue_buffer(struct auxtrace_queues *queues, 285 unsigned int idx, 286 struct auxtrace_buffer *buffer) 287{ 288 struct auxtrace_queue *queue; 289 int err; 290 291 if (idx >= queues->nr_queues) { 292 err = auxtrace_queues__grow(queues, idx + 1); 293 if (err) 294 return err; 295 } 296 297 queue = &queues->queue_array[idx]; 298 299 if (!queue->set) { 300 queue->set = true; 301 queue->tid = buffer->tid; 302 queue->cpu = buffer->cpu; 303 } 304 305 buffer->buffer_nr = queues->next_buffer_nr++; 306 307 list_add_tail(&buffer->list, &queue->head); 308 309 queues->new_data = true; 310 queues->populated = true; 311 312 return 0; 313} 314 315/* Limit buffers to 32MiB on 32-bit */ 316#define BUFFER_LIMIT_FOR_32_BIT (32 * 1024 * 1024) 317 318static int auxtrace_queues__split_buffer(struct auxtrace_queues *queues, 319 unsigned int idx, 320 struct auxtrace_buffer *buffer) 321{ 322 u64 sz = buffer->size; 323 bool consecutive = false; 324 struct auxtrace_buffer *b; 325 int err; 326 327 while (sz > BUFFER_LIMIT_FOR_32_BIT) { 328 b = memdup(buffer, sizeof(struct auxtrace_buffer)); 329 if (!b) 330 return -ENOMEM; 331 b->size = BUFFER_LIMIT_FOR_32_BIT; 332 b->consecutive = consecutive; 333 err = auxtrace_queues__queue_buffer(queues, idx, b); 334 if (err) { 335 auxtrace_buffer__free(b); 336 return err; 337 } 338 buffer->data_offset += BUFFER_LIMIT_FOR_32_BIT; 339 sz -= BUFFER_LIMIT_FOR_32_BIT; 340 consecutive = true; 341 } 342 343 buffer->size = sz; 344 buffer->consecutive = consecutive; 345 346 return 0; 347} 348 349static bool filter_cpu(struct perf_session *session, int cpu) 350{ 351 unsigned long *cpu_bitmap = session->itrace_synth_opts->cpu_bitmap; 352 353 return cpu_bitmap && cpu != -1 && !test_bit(cpu, cpu_bitmap); 354} 355 356static int auxtrace_queues__add_buffer(struct auxtrace_queues *queues, 357 struct perf_session *session, 358 unsigned int idx, 359 struct auxtrace_buffer *buffer, 360 struct auxtrace_buffer **buffer_ptr) 361{ 362 int err = -ENOMEM; 363 364 if (filter_cpu(session, buffer->cpu)) 365 return 0; 366 367 buffer = memdup(buffer, sizeof(*buffer)); 368 if (!buffer) 369 return -ENOMEM; 370 371 if (session->one_mmap) { 372 buffer->data = buffer->data_offset - session->one_mmap_offset + 373 session->one_mmap_addr; 374 } else if (perf_data__is_pipe(session->data)) { 375 buffer->data = auxtrace_copy_data(buffer->size, session); 376 if (!buffer->data) 377 goto out_free; 378 buffer->data_needs_freeing = true; 379 } else if (BITS_PER_LONG == 32 && 380 buffer->size > BUFFER_LIMIT_FOR_32_BIT) { 381 err = auxtrace_queues__split_buffer(queues, idx, buffer); 382 if (err) 383 goto out_free; 384 } 385 386 err = auxtrace_queues__queue_buffer(queues, idx, buffer); 387 if (err) 388 goto out_free; 389 390 /* FIXME: Doesn't work for split buffer */ 391 if (buffer_ptr) 392 *buffer_ptr = buffer; 393 394 return 0; 395 396out_free: 397 auxtrace_buffer__free(buffer); 398 return err; 399} 400 401int auxtrace_queues__add_event(struct auxtrace_queues *queues, 402 struct perf_session *session, 403 union perf_event *event, off_t data_offset, 404 struct auxtrace_buffer **buffer_ptr) 405{ 406 struct auxtrace_buffer buffer = { 407 .pid = -1, 408 .tid = event->auxtrace.tid, 409 .cpu = event->auxtrace.cpu, 410 .data_offset = data_offset, 411 .offset = event->auxtrace.offset, 412 .reference = event->auxtrace.reference, 413 .size = event->auxtrace.size, 414 }; 415 unsigned int idx = event->auxtrace.idx; 416 417 return auxtrace_queues__add_buffer(queues, session, idx, &buffer, 418 buffer_ptr); 419} 420 421static int auxtrace_queues__add_indexed_event(struct auxtrace_queues *queues, 422 struct perf_session *session, 423 off_t file_offset, size_t sz) 424{ 425 union perf_event *event; 426 int err; 427 char buf[PERF_SAMPLE_MAX_SIZE]; 428 429 err = perf_session__peek_event(session, file_offset, buf, 430 PERF_SAMPLE_MAX_SIZE, &event, NULL); 431 if (err) 432 return err; 433 434 if (event->header.type == PERF_RECORD_AUXTRACE) { 435 if (event->header.size < sizeof(struct perf_record_auxtrace) || 436 event->header.size != sz) { 437 err = -EINVAL; 438 goto out; 439 } 440 file_offset += event->header.size; 441 err = auxtrace_queues__add_event(queues, session, event, 442 file_offset, NULL); 443 } 444out: 445 return err; 446} 447 448void auxtrace_queues__free(struct auxtrace_queues *queues) 449{ 450 unsigned int i; 451 452 for (i = 0; i < queues->nr_queues; i++) { 453 while (!list_empty(&queues->queue_array[i].head)) { 454 struct auxtrace_buffer *buffer; 455 456 buffer = list_entry(queues->queue_array[i].head.next, 457 struct auxtrace_buffer, list); 458 list_del_init(&buffer->list); 459 auxtrace_buffer__free(buffer); 460 } 461 } 462 463 zfree(&queues->queue_array); 464 queues->nr_queues = 0; 465} 466 467static void auxtrace_heapify(struct auxtrace_heap_item *heap_array, 468 unsigned int pos, unsigned int queue_nr, 469 u64 ordinal) 470{ 471 unsigned int parent; 472 473 while (pos) { 474 parent = (pos - 1) >> 1; 475 if (heap_array[parent].ordinal <= ordinal) 476 break; 477 heap_array[pos] = heap_array[parent]; 478 pos = parent; 479 } 480 heap_array[pos].queue_nr = queue_nr; 481 heap_array[pos].ordinal = ordinal; 482} 483 484int auxtrace_heap__add(struct auxtrace_heap *heap, unsigned int queue_nr, 485 u64 ordinal) 486{ 487 struct auxtrace_heap_item *heap_array; 488 489 if (queue_nr >= heap->heap_sz) { 490 unsigned int heap_sz = AUXTRACE_INIT_NR_QUEUES; 491 492 while (heap_sz <= queue_nr) 493 heap_sz <<= 1; 494 heap_array = realloc(heap->heap_array, 495 heap_sz * sizeof(struct auxtrace_heap_item)); 496 if (!heap_array) 497 return -ENOMEM; 498 heap->heap_array = heap_array; 499 heap->heap_sz = heap_sz; 500 } 501 502 auxtrace_heapify(heap->heap_array, heap->heap_cnt++, queue_nr, ordinal); 503 504 return 0; 505} 506 507void auxtrace_heap__free(struct auxtrace_heap *heap) 508{ 509 zfree(&heap->heap_array); 510 heap->heap_cnt = 0; 511 heap->heap_sz = 0; 512} 513 514void auxtrace_heap__pop(struct auxtrace_heap *heap) 515{ 516 unsigned int pos, last, heap_cnt = heap->heap_cnt; 517 struct auxtrace_heap_item *heap_array; 518 519 if (!heap_cnt) 520 return; 521 522 heap->heap_cnt -= 1; 523 524 heap_array = heap->heap_array; 525 526 pos = 0; 527 while (1) { 528 unsigned int left, right; 529 530 left = (pos << 1) + 1; 531 if (left >= heap_cnt) 532 break; 533 right = left + 1; 534 if (right >= heap_cnt) { 535 heap_array[pos] = heap_array[left]; 536 return; 537 } 538 if (heap_array[left].ordinal < heap_array[right].ordinal) { 539 heap_array[pos] = heap_array[left]; 540 pos = left; 541 } else { 542 heap_array[pos] = heap_array[right]; 543 pos = right; 544 } 545 } 546 547 last = heap_cnt - 1; 548 auxtrace_heapify(heap_array, pos, heap_array[last].queue_nr, 549 heap_array[last].ordinal); 550} 551 552size_t auxtrace_record__info_priv_size(struct auxtrace_record *itr, 553 struct evlist *evlist) 554{ 555 if (itr) 556 return itr->info_priv_size(itr, evlist); 557 return 0; 558} 559 560static int auxtrace_not_supported(void) 561{ 562 pr_err("AUX area tracing is not supported on this architecture\n"); 563 return -EINVAL; 564} 565 566int auxtrace_record__info_fill(struct auxtrace_record *itr, 567 struct perf_session *session, 568 struct perf_record_auxtrace_info *auxtrace_info, 569 size_t priv_size) 570{ 571 if (itr) 572 return itr->info_fill(itr, session, auxtrace_info, priv_size); 573 return auxtrace_not_supported(); 574} 575 576void auxtrace_record__free(struct auxtrace_record *itr) 577{ 578 if (itr) 579 itr->free(itr); 580} 581 582int auxtrace_record__snapshot_start(struct auxtrace_record *itr) 583{ 584 if (itr && itr->snapshot_start) 585 return itr->snapshot_start(itr); 586 return 0; 587} 588 589int auxtrace_record__snapshot_finish(struct auxtrace_record *itr, bool on_exit) 590{ 591 if (!on_exit && itr && itr->snapshot_finish) 592 return itr->snapshot_finish(itr); 593 return 0; 594} 595 596int auxtrace_record__find_snapshot(struct auxtrace_record *itr, int idx, 597 struct auxtrace_mmap *mm, 598 unsigned char *data, u64 *head, u64 *old) 599{ 600 if (itr && itr->find_snapshot) 601 return itr->find_snapshot(itr, idx, mm, data, head, old); 602 return 0; 603} 604 605int auxtrace_record__options(struct auxtrace_record *itr, 606 struct evlist *evlist, 607 struct record_opts *opts) 608{ 609 if (itr) { 610 itr->evlist = evlist; 611 return itr->recording_options(itr, evlist, opts); 612 } 613 return 0; 614} 615 616u64 auxtrace_record__reference(struct auxtrace_record *itr) 617{ 618 if (itr) 619 return itr->reference(itr); 620 return 0; 621} 622 623int auxtrace_parse_snapshot_options(struct auxtrace_record *itr, 624 struct record_opts *opts, const char *str) 625{ 626 if (!str) 627 return 0; 628 629 /* PMU-agnostic options */ 630 switch (*str) { 631 case 'e': 632 opts->auxtrace_snapshot_on_exit = true; 633 str++; 634 break; 635 default: 636 break; 637 } 638 639 if (itr && itr->parse_snapshot_options) 640 return itr->parse_snapshot_options(itr, opts, str); 641 642 pr_err("No AUX area tracing to snapshot\n"); 643 return -EINVAL; 644} 645 646int auxtrace_record__read_finish(struct auxtrace_record *itr, int idx) 647{ 648 struct evsel *evsel; 649 650 if (!itr->evlist || !itr->pmu) 651 return -EINVAL; 652 653 evlist__for_each_entry(itr->evlist, evsel) { 654 if (evsel->core.attr.type == itr->pmu->type) { 655 if (evsel->disabled) 656 return 0; 657 return perf_evlist__enable_event_idx(itr->evlist, evsel, 658 idx); 659 } 660 } 661 return -EINVAL; 662} 663 664/* 665 * Event record size is 16-bit which results in a maximum size of about 64KiB. 666 * Allow about 4KiB for the rest of the sample record, to give a maximum 667 * AUX area sample size of 60KiB. 668 */ 669#define MAX_AUX_SAMPLE_SIZE (60 * 1024) 670 671/* Arbitrary default size if no other default provided */ 672#define DEFAULT_AUX_SAMPLE_SIZE (4 * 1024) 673 674static int auxtrace_validate_aux_sample_size(struct evlist *evlist, 675 struct record_opts *opts) 676{ 677 struct evsel *evsel; 678 bool has_aux_leader = false; 679 u32 sz; 680 681 evlist__for_each_entry(evlist, evsel) { 682 sz = evsel->core.attr.aux_sample_size; 683 if (evsel__is_group_leader(evsel)) { 684 has_aux_leader = evsel__is_aux_event(evsel); 685 if (sz) { 686 if (has_aux_leader) 687 pr_err("Cannot add AUX area sampling to an AUX area event\n"); 688 else 689 pr_err("Cannot add AUX area sampling to a group leader\n"); 690 return -EINVAL; 691 } 692 } 693 if (sz > MAX_AUX_SAMPLE_SIZE) { 694 pr_err("AUX area sample size %u too big, max. %d\n", 695 sz, MAX_AUX_SAMPLE_SIZE); 696 return -EINVAL; 697 } 698 if (sz) { 699 if (!has_aux_leader) { 700 pr_err("Cannot add AUX area sampling because group leader is not an AUX area event\n"); 701 return -EINVAL; 702 } 703 evsel__set_sample_bit(evsel, AUX); 704 opts->auxtrace_sample_mode = true; 705 } else { 706 evsel__reset_sample_bit(evsel, AUX); 707 } 708 } 709 710 if (!opts->auxtrace_sample_mode) { 711 pr_err("AUX area sampling requires an AUX area event group leader plus other events to which to add samples\n"); 712 return -EINVAL; 713 } 714 715 if (!perf_can_aux_sample()) { 716 pr_err("AUX area sampling is not supported by kernel\n"); 717 return -EINVAL; 718 } 719 720 return 0; 721} 722 723int auxtrace_parse_sample_options(struct auxtrace_record *itr, 724 struct evlist *evlist, 725 struct record_opts *opts, const char *str) 726{ 727 struct evsel_config_term *term; 728 struct evsel *aux_evsel; 729 bool has_aux_sample_size = false; 730 bool has_aux_leader = false; 731 struct evsel *evsel; 732 char *endptr; 733 unsigned long sz; 734 735 if (!str) 736 goto no_opt; 737 738 if (!itr) { 739 pr_err("No AUX area event to sample\n"); 740 return -EINVAL; 741 } 742 743 sz = strtoul(str, &endptr, 0); 744 if (*endptr || sz > UINT_MAX) { 745 pr_err("Bad AUX area sampling option: '%s'\n", str); 746 return -EINVAL; 747 } 748 749 if (!sz) 750 sz = itr->default_aux_sample_size; 751 752 if (!sz) 753 sz = DEFAULT_AUX_SAMPLE_SIZE; 754 755 /* Set aux_sample_size based on --aux-sample option */ 756 evlist__for_each_entry(evlist, evsel) { 757 if (evsel__is_group_leader(evsel)) { 758 has_aux_leader = evsel__is_aux_event(evsel); 759 } else if (has_aux_leader) { 760 evsel->core.attr.aux_sample_size = sz; 761 } 762 } 763no_opt: 764 aux_evsel = NULL; 765 /* Override with aux_sample_size from config term */ 766 evlist__for_each_entry(evlist, evsel) { 767 if (evsel__is_aux_event(evsel)) 768 aux_evsel = evsel; 769 term = evsel__get_config_term(evsel, AUX_SAMPLE_SIZE); 770 if (term) { 771 has_aux_sample_size = true; 772 evsel->core.attr.aux_sample_size = term->val.aux_sample_size; 773 /* If possible, group with the AUX event */ 774 if (aux_evsel && evsel->core.attr.aux_sample_size) 775 perf_evlist__regroup(evlist, aux_evsel, evsel); 776 } 777 } 778 779 if (!str && !has_aux_sample_size) 780 return 0; 781 782 if (!itr) { 783 pr_err("No AUX area event to sample\n"); 784 return -EINVAL; 785 } 786 787 return auxtrace_validate_aux_sample_size(evlist, opts); 788} 789 790struct auxtrace_record *__weak 791auxtrace_record__init(struct evlist *evlist __maybe_unused, int *err) 792{ 793 *err = 0; 794 return NULL; 795} 796 797static int auxtrace_index__alloc(struct list_head *head) 798{ 799 struct auxtrace_index *auxtrace_index; 800 801 auxtrace_index = malloc(sizeof(struct auxtrace_index)); 802 if (!auxtrace_index) 803 return -ENOMEM; 804 805 auxtrace_index->nr = 0; 806 INIT_LIST_HEAD(&auxtrace_index->list); 807 808 list_add_tail(&auxtrace_index->list, head); 809 810 return 0; 811} 812 813void auxtrace_index__free(struct list_head *head) 814{ 815 struct auxtrace_index *auxtrace_index, *n; 816 817 list_for_each_entry_safe(auxtrace_index, n, head, list) { 818 list_del_init(&auxtrace_index->list); 819 free(auxtrace_index); 820 } 821} 822 823static struct auxtrace_index *auxtrace_index__last(struct list_head *head) 824{ 825 struct auxtrace_index *auxtrace_index; 826 int err; 827 828 if (list_empty(head)) { 829 err = auxtrace_index__alloc(head); 830 if (err) 831 return NULL; 832 } 833 834 auxtrace_index = list_entry(head->prev, struct auxtrace_index, list); 835 836 if (auxtrace_index->nr >= PERF_AUXTRACE_INDEX_ENTRY_COUNT) { 837 err = auxtrace_index__alloc(head); 838 if (err) 839 return NULL; 840 auxtrace_index = list_entry(head->prev, struct auxtrace_index, 841 list); 842 } 843 844 return auxtrace_index; 845} 846 847int auxtrace_index__auxtrace_event(struct list_head *head, 848 union perf_event *event, off_t file_offset) 849{ 850 struct auxtrace_index *auxtrace_index; 851 size_t nr; 852 853 auxtrace_index = auxtrace_index__last(head); 854 if (!auxtrace_index) 855 return -ENOMEM; 856 857 nr = auxtrace_index->nr; 858 auxtrace_index->entries[nr].file_offset = file_offset; 859 auxtrace_index->entries[nr].sz = event->header.size; 860 auxtrace_index->nr += 1; 861 862 return 0; 863} 864 865static int auxtrace_index__do_write(int fd, 866 struct auxtrace_index *auxtrace_index) 867{ 868 struct auxtrace_index_entry ent; 869 size_t i; 870 871 for (i = 0; i < auxtrace_index->nr; i++) { 872 ent.file_offset = auxtrace_index->entries[i].file_offset; 873 ent.sz = auxtrace_index->entries[i].sz; 874 if (writen(fd, &ent, sizeof(ent)) != sizeof(ent)) 875 return -errno; 876 } 877 return 0; 878} 879 880int auxtrace_index__write(int fd, struct list_head *head) 881{ 882 struct auxtrace_index *auxtrace_index; 883 u64 total = 0; 884 int err; 885 886 list_for_each_entry(auxtrace_index, head, list) 887 total += auxtrace_index->nr; 888 889 if (writen(fd, &total, sizeof(total)) != sizeof(total)) 890 return -errno; 891 892 list_for_each_entry(auxtrace_index, head, list) { 893 err = auxtrace_index__do_write(fd, auxtrace_index); 894 if (err) 895 return err; 896 } 897 898 return 0; 899} 900 901static int auxtrace_index__process_entry(int fd, struct list_head *head, 902 bool needs_swap) 903{ 904 struct auxtrace_index *auxtrace_index; 905 struct auxtrace_index_entry ent; 906 size_t nr; 907 908 if (readn(fd, &ent, sizeof(ent)) != sizeof(ent)) 909 return -1; 910 911 auxtrace_index = auxtrace_index__last(head); 912 if (!auxtrace_index) 913 return -1; 914 915 nr = auxtrace_index->nr; 916 if (needs_swap) { 917 auxtrace_index->entries[nr].file_offset = 918 bswap_64(ent.file_offset); 919 auxtrace_index->entries[nr].sz = bswap_64(ent.sz); 920 } else { 921 auxtrace_index->entries[nr].file_offset = ent.file_offset; 922 auxtrace_index->entries[nr].sz = ent.sz; 923 } 924 925 auxtrace_index->nr = nr + 1; 926 927 return 0; 928} 929 930int auxtrace_index__process(int fd, u64 size, struct perf_session *session, 931 bool needs_swap) 932{ 933 struct list_head *head = &session->auxtrace_index; 934 u64 nr; 935 936 if (readn(fd, &nr, sizeof(u64)) != sizeof(u64)) 937 return -1; 938 939 if (needs_swap) 940 nr = bswap_64(nr); 941 942 if (sizeof(u64) + nr * sizeof(struct auxtrace_index_entry) > size) 943 return -1; 944 945 while (nr--) { 946 int err; 947 948 err = auxtrace_index__process_entry(fd, head, needs_swap); 949 if (err) 950 return -1; 951 } 952 953 return 0; 954} 955 956static int auxtrace_queues__process_index_entry(struct auxtrace_queues *queues, 957 struct perf_session *session, 958 struct auxtrace_index_entry *ent) 959{ 960 return auxtrace_queues__add_indexed_event(queues, session, 961 ent->file_offset, ent->sz); 962} 963 964int auxtrace_queues__process_index(struct auxtrace_queues *queues, 965 struct perf_session *session) 966{ 967 struct auxtrace_index *auxtrace_index; 968 struct auxtrace_index_entry *ent; 969 size_t i; 970 int err; 971 972 if (auxtrace__dont_decode(session)) 973 return 0; 974 975 list_for_each_entry(auxtrace_index, &session->auxtrace_index, list) { 976 for (i = 0; i < auxtrace_index->nr; i++) { 977 ent = &auxtrace_index->entries[i]; 978 err = auxtrace_queues__process_index_entry(queues, 979 session, 980 ent); 981 if (err) 982 return err; 983 } 984 } 985 return 0; 986} 987 988struct auxtrace_buffer *auxtrace_buffer__next(struct auxtrace_queue *queue, 989 struct auxtrace_buffer *buffer) 990{ 991 if (buffer) { 992 if (list_is_last(&buffer->list, &queue->head)) 993 return NULL; 994 return list_entry(buffer->list.next, struct auxtrace_buffer, 995 list); 996 } else { 997 if (list_empty(&queue->head)) 998 return NULL; 999 return list_entry(queue->head.next, struct auxtrace_buffer, 1000 list); 1001 } 1002} 1003 1004struct auxtrace_queue *auxtrace_queues__sample_queue(struct auxtrace_queues *queues, 1005 struct perf_sample *sample, 1006 struct perf_session *session) 1007{ 1008 struct perf_sample_id *sid; 1009 unsigned int idx; 1010 u64 id; 1011 1012 id = sample->id; 1013 if (!id) 1014 return NULL; 1015 1016 sid = perf_evlist__id2sid(session->evlist, id); 1017 if (!sid) 1018 return NULL; 1019 1020 idx = sid->idx; 1021 1022 if (idx >= queues->nr_queues) 1023 return NULL; 1024 1025 return &queues->queue_array[idx]; 1026} 1027 1028int auxtrace_queues__add_sample(struct auxtrace_queues *queues, 1029 struct perf_session *session, 1030 struct perf_sample *sample, u64 data_offset, 1031 u64 reference) 1032{ 1033 struct auxtrace_buffer buffer = { 1034 .pid = -1, 1035 .data_offset = data_offset, 1036 .reference = reference, 1037 .size = sample->aux_sample.size, 1038 }; 1039 struct perf_sample_id *sid; 1040 u64 id = sample->id; 1041 unsigned int idx; 1042 1043 if (!id) 1044 return -EINVAL; 1045 1046 sid = perf_evlist__id2sid(session->evlist, id); 1047 if (!sid) 1048 return -ENOENT; 1049 1050 idx = sid->idx; 1051 buffer.tid = sid->tid; 1052 buffer.cpu = sid->cpu; 1053 1054 return auxtrace_queues__add_buffer(queues, session, idx, &buffer, NULL); 1055} 1056 1057struct queue_data { 1058 bool samples; 1059 bool events; 1060}; 1061 1062static int auxtrace_queue_data_cb(struct perf_session *session, 1063 union perf_event *event, u64 offset, 1064 void *data) 1065{ 1066 struct queue_data *qd = data; 1067 struct perf_sample sample; 1068 int err; 1069 1070 if (qd->events && event->header.type == PERF_RECORD_AUXTRACE) { 1071 if (event->header.size < sizeof(struct perf_record_auxtrace)) 1072 return -EINVAL; 1073 offset += event->header.size; 1074 return session->auxtrace->queue_data(session, NULL, event, 1075 offset); 1076 } 1077 1078 if (!qd->samples || event->header.type != PERF_RECORD_SAMPLE) 1079 return 0; 1080 1081 err = perf_evlist__parse_sample(session->evlist, event, &sample); 1082 if (err) 1083 return err; 1084 1085 if (!sample.aux_sample.size) 1086 return 0; 1087 1088 offset += sample.aux_sample.data - (void *)event; 1089 1090 return session->auxtrace->queue_data(session, &sample, NULL, offset); 1091} 1092 1093int auxtrace_queue_data(struct perf_session *session, bool samples, bool events) 1094{ 1095 struct queue_data qd = { 1096 .samples = samples, 1097 .events = events, 1098 }; 1099 1100 if (auxtrace__dont_decode(session)) 1101 return 0; 1102 1103 if (!session->auxtrace || !session->auxtrace->queue_data) 1104 return -EINVAL; 1105 1106 return perf_session__peek_events(session, session->header.data_offset, 1107 session->header.data_size, 1108 auxtrace_queue_data_cb, &qd); 1109} 1110 1111void *auxtrace_buffer__get_data(struct auxtrace_buffer *buffer, int fd) 1112{ 1113 size_t adj = buffer->data_offset & (page_size - 1); 1114 size_t size = buffer->size + adj; 1115 off_t file_offset = buffer->data_offset - adj; 1116 void *addr; 1117 1118 if (buffer->data) 1119 return buffer->data; 1120 1121 addr = mmap(NULL, size, PROT_READ, MAP_SHARED, fd, file_offset); 1122 if (addr == MAP_FAILED) 1123 return NULL; 1124 1125 buffer->mmap_addr = addr; 1126 buffer->mmap_size = size; 1127 1128 buffer->data = addr + adj; 1129 1130 return buffer->data; 1131} 1132 1133void auxtrace_buffer__put_data(struct auxtrace_buffer *buffer) 1134{ 1135 if (!buffer->data || !buffer->mmap_addr) 1136 return; 1137 munmap(buffer->mmap_addr, buffer->mmap_size); 1138 buffer->mmap_addr = NULL; 1139 buffer->mmap_size = 0; 1140 buffer->data = NULL; 1141 buffer->use_data = NULL; 1142} 1143 1144void auxtrace_buffer__drop_data(struct auxtrace_buffer *buffer) 1145{ 1146 auxtrace_buffer__put_data(buffer); 1147 if (buffer->data_needs_freeing) { 1148 buffer->data_needs_freeing = false; 1149 zfree(&buffer->data); 1150 buffer->use_data = NULL; 1151 buffer->size = 0; 1152 } 1153} 1154 1155void auxtrace_buffer__free(struct auxtrace_buffer *buffer) 1156{ 1157 auxtrace_buffer__drop_data(buffer); 1158 free(buffer); 1159} 1160 1161void auxtrace_synth_error(struct perf_record_auxtrace_error *auxtrace_error, int type, 1162 int code, int cpu, pid_t pid, pid_t tid, u64 ip, 1163 const char *msg, u64 timestamp) 1164{ 1165 size_t size; 1166 1167 memset(auxtrace_error, 0, sizeof(struct perf_record_auxtrace_error)); 1168 1169 auxtrace_error->header.type = PERF_RECORD_AUXTRACE_ERROR; 1170 auxtrace_error->type = type; 1171 auxtrace_error->code = code; 1172 auxtrace_error->cpu = cpu; 1173 auxtrace_error->pid = pid; 1174 auxtrace_error->tid = tid; 1175 auxtrace_error->fmt = 1; 1176 auxtrace_error->ip = ip; 1177 auxtrace_error->time = timestamp; 1178 strlcpy(auxtrace_error->msg, msg, MAX_AUXTRACE_ERROR_MSG); 1179 1180 size = (void *)auxtrace_error->msg - (void *)auxtrace_error + 1181 strlen(auxtrace_error->msg) + 1; 1182 auxtrace_error->header.size = PERF_ALIGN(size, sizeof(u64)); 1183} 1184 1185int perf_event__synthesize_auxtrace_info(struct auxtrace_record *itr, 1186 struct perf_tool *tool, 1187 struct perf_session *session, 1188 perf_event__handler_t process) 1189{ 1190 union perf_event *ev; 1191 size_t priv_size; 1192 int err; 1193 1194 pr_debug2("Synthesizing auxtrace information\n"); 1195 priv_size = auxtrace_record__info_priv_size(itr, session->evlist); 1196 ev = zalloc(sizeof(struct perf_record_auxtrace_info) + priv_size); 1197 if (!ev) 1198 return -ENOMEM; 1199 1200 ev->auxtrace_info.header.type = PERF_RECORD_AUXTRACE_INFO; 1201 ev->auxtrace_info.header.size = sizeof(struct perf_record_auxtrace_info) + 1202 priv_size; 1203 err = auxtrace_record__info_fill(itr, session, &ev->auxtrace_info, 1204 priv_size); 1205 if (err) 1206 goto out_free; 1207 1208 err = process(tool, ev, NULL, NULL); 1209out_free: 1210 free(ev); 1211 return err; 1212} 1213 1214static void unleader_evsel(struct evlist *evlist, struct evsel *leader) 1215{ 1216 struct evsel *new_leader = NULL; 1217 struct evsel *evsel; 1218 1219 /* Find new leader for the group */ 1220 evlist__for_each_entry(evlist, evsel) { 1221 if (evsel->leader != leader || evsel == leader) 1222 continue; 1223 if (!new_leader) 1224 new_leader = evsel; 1225 evsel->leader = new_leader; 1226 } 1227 1228 /* Update group information */ 1229 if (new_leader) { 1230 zfree(&new_leader->group_name); 1231 new_leader->group_name = leader->group_name; 1232 leader->group_name = NULL; 1233 1234 new_leader->core.nr_members = leader->core.nr_members - 1; 1235 leader->core.nr_members = 1; 1236 } 1237} 1238 1239static void unleader_auxtrace(struct perf_session *session) 1240{ 1241 struct evsel *evsel; 1242 1243 evlist__for_each_entry(session->evlist, evsel) { 1244 if (auxtrace__evsel_is_auxtrace(session, evsel) && 1245 evsel__is_group_leader(evsel)) { 1246 unleader_evsel(session->evlist, evsel); 1247 } 1248 } 1249} 1250 1251int perf_event__process_auxtrace_info(struct perf_session *session, 1252 union perf_event *event) 1253{ 1254 enum auxtrace_type type = event->auxtrace_info.type; 1255 int err; 1256 1257 if (dump_trace) 1258 fprintf(stdout, " type: %u\n", type); 1259 1260 switch (type) { 1261 case PERF_AUXTRACE_INTEL_PT: 1262 err = intel_pt_process_auxtrace_info(event, session); 1263 break; 1264 case PERF_AUXTRACE_INTEL_BTS: 1265 err = intel_bts_process_auxtrace_info(event, session); 1266 break; 1267 case PERF_AUXTRACE_ARM_SPE: 1268 err = arm_spe_process_auxtrace_info(event, session); 1269 break; 1270 case PERF_AUXTRACE_CS_ETM: 1271 err = cs_etm__process_auxtrace_info(event, session); 1272 break; 1273 case PERF_AUXTRACE_S390_CPUMSF: 1274 err = s390_cpumsf_process_auxtrace_info(event, session); 1275 break; 1276 case PERF_AUXTRACE_UNKNOWN: 1277 default: 1278 return -EINVAL; 1279 } 1280 1281 if (err) 1282 return err; 1283 1284 unleader_auxtrace(session); 1285 1286 return 0; 1287} 1288 1289s64 perf_event__process_auxtrace(struct perf_session *session, 1290 union perf_event *event) 1291{ 1292 s64 err; 1293 1294 if (dump_trace) 1295 fprintf(stdout, " size: %#"PRI_lx64" offset: %#"PRI_lx64" ref: %#"PRI_lx64" idx: %u tid: %d cpu: %d\n", 1296 event->auxtrace.size, event->auxtrace.offset, 1297 event->auxtrace.reference, event->auxtrace.idx, 1298 event->auxtrace.tid, event->auxtrace.cpu); 1299 1300 if (auxtrace__dont_decode(session)) 1301 return event->auxtrace.size; 1302 1303 if (!session->auxtrace || event->header.type != PERF_RECORD_AUXTRACE) 1304 return -EINVAL; 1305 1306 err = session->auxtrace->process_auxtrace_event(session, event, session->tool); 1307 if (err < 0) 1308 return err; 1309 1310 return event->auxtrace.size; 1311} 1312 1313#define PERF_ITRACE_DEFAULT_PERIOD_TYPE PERF_ITRACE_PERIOD_NANOSECS 1314#define PERF_ITRACE_DEFAULT_PERIOD 100000 1315#define PERF_ITRACE_DEFAULT_CALLCHAIN_SZ 16 1316#define PERF_ITRACE_MAX_CALLCHAIN_SZ 1024 1317#define PERF_ITRACE_DEFAULT_LAST_BRANCH_SZ 64 1318#define PERF_ITRACE_MAX_LAST_BRANCH_SZ 1024 1319 1320void itrace_synth_opts__set_default(struct itrace_synth_opts *synth_opts, 1321 bool no_sample) 1322{ 1323 synth_opts->branches = true; 1324 synth_opts->transactions = true; 1325 synth_opts->ptwrites = true; 1326 synth_opts->pwr_events = true; 1327 synth_opts->other_events = true; 1328 synth_opts->errors = true; 1329 synth_opts->flc = true; 1330 synth_opts->llc = true; 1331 synth_opts->tlb = true; 1332 synth_opts->remote_access = true; 1333 1334 if (no_sample) { 1335 synth_opts->period_type = PERF_ITRACE_PERIOD_INSTRUCTIONS; 1336 synth_opts->period = 1; 1337 synth_opts->calls = true; 1338 } else { 1339 synth_opts->instructions = true; 1340 synth_opts->period_type = PERF_ITRACE_DEFAULT_PERIOD_TYPE; 1341 synth_opts->period = PERF_ITRACE_DEFAULT_PERIOD; 1342 } 1343 synth_opts->callchain_sz = PERF_ITRACE_DEFAULT_CALLCHAIN_SZ; 1344 synth_opts->last_branch_sz = PERF_ITRACE_DEFAULT_LAST_BRANCH_SZ; 1345 synth_opts->initial_skip = 0; 1346} 1347 1348static int get_flag(const char **ptr, unsigned int *flags) 1349{ 1350 while (1) { 1351 char c = **ptr; 1352 1353 if (c >= 'a' && c <= 'z') { 1354 *flags |= 1 << (c - 'a'); 1355 ++*ptr; 1356 return 0; 1357 } else if (c == ' ') { 1358 ++*ptr; 1359 continue; 1360 } else { 1361 return -1; 1362 } 1363 } 1364} 1365 1366static int get_flags(const char **ptr, unsigned int *plus_flags, unsigned int *minus_flags) 1367{ 1368 while (1) { 1369 switch (**ptr) { 1370 case '+': 1371 ++*ptr; 1372 if (get_flag(ptr, plus_flags)) 1373 return -1; 1374 break; 1375 case '-': 1376 ++*ptr; 1377 if (get_flag(ptr, minus_flags)) 1378 return -1; 1379 break; 1380 case ' ': 1381 ++*ptr; 1382 break; 1383 default: 1384 return 0; 1385 } 1386 } 1387} 1388 1389/* 1390 * Please check tools/perf/Documentation/perf-script.txt for information 1391 * about the options parsed here, which is introduced after this cset, 1392 * when support in 'perf script' for these options is introduced. 1393 */ 1394int itrace_parse_synth_opts(const struct option *opt, const char *str, 1395 int unset) 1396{ 1397 struct itrace_synth_opts *synth_opts = opt->value; 1398 const char *p; 1399 char *endptr; 1400 bool period_type_set = false; 1401 bool period_set = false; 1402 1403 synth_opts->set = true; 1404 1405 if (unset) { 1406 synth_opts->dont_decode = true; 1407 return 0; 1408 } 1409 1410 if (!str) { 1411 itrace_synth_opts__set_default(synth_opts, 1412 synth_opts->default_no_sample); 1413 return 0; 1414 } 1415 1416 for (p = str; *p;) { 1417 switch (*p++) { 1418 case 'i': 1419 synth_opts->instructions = true; 1420 while (*p == ' ' || *p == ',') 1421 p += 1; 1422 if (isdigit(*p)) { 1423 synth_opts->period = strtoull(p, &endptr, 10); 1424 period_set = true; 1425 p = endptr; 1426 while (*p == ' ' || *p == ',') 1427 p += 1; 1428 switch (*p++) { 1429 case 'i': 1430 synth_opts->period_type = 1431 PERF_ITRACE_PERIOD_INSTRUCTIONS; 1432 period_type_set = true; 1433 break; 1434 case 't': 1435 synth_opts->period_type = 1436 PERF_ITRACE_PERIOD_TICKS; 1437 period_type_set = true; 1438 break; 1439 case 'm': 1440 synth_opts->period *= 1000; 1441 /* Fall through */ 1442 case 'u': 1443 synth_opts->period *= 1000; 1444 /* Fall through */ 1445 case 'n': 1446 if (*p++ != 's') 1447 goto out_err; 1448 synth_opts->period_type = 1449 PERF_ITRACE_PERIOD_NANOSECS; 1450 period_type_set = true; 1451 break; 1452 case '\0': 1453 goto out; 1454 default: 1455 goto out_err; 1456 } 1457 } 1458 break; 1459 case 'b': 1460 synth_opts->branches = true; 1461 break; 1462 case 'x': 1463 synth_opts->transactions = true; 1464 break; 1465 case 'w': 1466 synth_opts->ptwrites = true; 1467 break; 1468 case 'p': 1469 synth_opts->pwr_events = true; 1470 break; 1471 case 'o': 1472 synth_opts->other_events = true; 1473 break; 1474 case 'e': 1475 synth_opts->errors = true; 1476 if (get_flags(&p, &synth_opts->error_plus_flags, 1477 &synth_opts->error_minus_flags)) 1478 goto out_err; 1479 break; 1480 case 'd': 1481 synth_opts->log = true; 1482 if (get_flags(&p, &synth_opts->log_plus_flags, 1483 &synth_opts->log_minus_flags)) 1484 goto out_err; 1485 break; 1486 case 'c': 1487 synth_opts->branches = true; 1488 synth_opts->calls = true; 1489 break; 1490 case 'r': 1491 synth_opts->branches = true; 1492 synth_opts->returns = true; 1493 break; 1494 case 'G': 1495 case 'g': 1496 if (p[-1] == 'G') 1497 synth_opts->add_callchain = true; 1498 else 1499 synth_opts->callchain = true; 1500 synth_opts->callchain_sz = 1501 PERF_ITRACE_DEFAULT_CALLCHAIN_SZ; 1502 while (*p == ' ' || *p == ',') 1503 p += 1; 1504 if (isdigit(*p)) { 1505 unsigned int val; 1506 1507 val = strtoul(p, &endptr, 10); 1508 p = endptr; 1509 if (!val || val > PERF_ITRACE_MAX_CALLCHAIN_SZ) 1510 goto out_err; 1511 synth_opts->callchain_sz = val; 1512 } 1513 break; 1514 case 'L': 1515 case 'l': 1516 if (p[-1] == 'L') 1517 synth_opts->add_last_branch = true; 1518 else 1519 synth_opts->last_branch = true; 1520 synth_opts->last_branch_sz = 1521 PERF_ITRACE_DEFAULT_LAST_BRANCH_SZ; 1522 while (*p == ' ' || *p == ',') 1523 p += 1; 1524 if (isdigit(*p)) { 1525 unsigned int val; 1526 1527 val = strtoul(p, &endptr, 10); 1528 p = endptr; 1529 if (!val || 1530 val > PERF_ITRACE_MAX_LAST_BRANCH_SZ) 1531 goto out_err; 1532 synth_opts->last_branch_sz = val; 1533 } 1534 break; 1535 case 's': 1536 synth_opts->initial_skip = strtoul(p, &endptr, 10); 1537 if (p == endptr) 1538 goto out_err; 1539 p = endptr; 1540 break; 1541 case 'f': 1542 synth_opts->flc = true; 1543 break; 1544 case 'm': 1545 synth_opts->llc = true; 1546 break; 1547 case 't': 1548 synth_opts->tlb = true; 1549 break; 1550 case 'a': 1551 synth_opts->remote_access = true; 1552 break; 1553 case 'q': 1554 synth_opts->quick += 1; 1555 break; 1556 case ' ': 1557 case ',': 1558 break; 1559 default: 1560 goto out_err; 1561 } 1562 } 1563out: 1564 if (synth_opts->instructions) { 1565 if (!period_type_set) 1566 synth_opts->period_type = 1567 PERF_ITRACE_DEFAULT_PERIOD_TYPE; 1568 if (!period_set) 1569 synth_opts->period = PERF_ITRACE_DEFAULT_PERIOD; 1570 } 1571 1572 return 0; 1573 1574out_err: 1575 pr_err("Bad Instruction Tracing options '%s'\n", str); 1576 return -EINVAL; 1577} 1578 1579static const char * const auxtrace_error_type_name[] = { 1580 [PERF_AUXTRACE_ERROR_ITRACE] = "instruction trace", 1581}; 1582 1583static const char *auxtrace_error_name(int type) 1584{ 1585 const char *error_type_name = NULL; 1586 1587 if (type < PERF_AUXTRACE_ERROR_MAX) 1588 error_type_name = auxtrace_error_type_name[type]; 1589 if (!error_type_name) 1590 error_type_name = "unknown AUX"; 1591 return error_type_name; 1592} 1593 1594size_t perf_event__fprintf_auxtrace_error(union perf_event *event, FILE *fp) 1595{ 1596 struct perf_record_auxtrace_error *e = &event->auxtrace_error; 1597 unsigned long long nsecs = e->time; 1598 const char *msg = e->msg; 1599 int ret; 1600 1601 ret = fprintf(fp, " %s error type %u", 1602 auxtrace_error_name(e->type), e->type); 1603 1604 if (e->fmt && nsecs) { 1605 unsigned long secs = nsecs / NSEC_PER_SEC; 1606 1607 nsecs -= secs * NSEC_PER_SEC; 1608 ret += fprintf(fp, " time %lu.%09llu", secs, nsecs); 1609 } else { 1610 ret += fprintf(fp, " time 0"); 1611 } 1612 1613 if (!e->fmt) 1614 msg = (const char *)&e->time; 1615 1616 ret += fprintf(fp, " cpu %d pid %d tid %d ip %#"PRI_lx64" code %u: %s\n", 1617 e->cpu, e->pid, e->tid, e->ip, e->code, msg); 1618 return ret; 1619} 1620 1621void perf_session__auxtrace_error_inc(struct perf_session *session, 1622 union perf_event *event) 1623{ 1624 struct perf_record_auxtrace_error *e = &event->auxtrace_error; 1625 1626 if (e->type < PERF_AUXTRACE_ERROR_MAX) 1627 session->evlist->stats.nr_auxtrace_errors[e->type] += 1; 1628} 1629 1630void events_stats__auxtrace_error_warn(const struct events_stats *stats) 1631{ 1632 int i; 1633 1634 for (i = 0; i < PERF_AUXTRACE_ERROR_MAX; i++) { 1635 if (!stats->nr_auxtrace_errors[i]) 1636 continue; 1637 ui__warning("%u %s errors\n", 1638 stats->nr_auxtrace_errors[i], 1639 auxtrace_error_name(i)); 1640 } 1641} 1642 1643int perf_event__process_auxtrace_error(struct perf_session *session, 1644 union perf_event *event) 1645{ 1646 if (auxtrace__dont_decode(session)) 1647 return 0; 1648 1649 perf_event__fprintf_auxtrace_error(event, stdout); 1650 return 0; 1651} 1652 1653static int __auxtrace_mmap__read(struct mmap *map, 1654 struct auxtrace_record *itr, 1655 struct perf_tool *tool, process_auxtrace_t fn, 1656 bool snapshot, size_t snapshot_size) 1657{ 1658 struct auxtrace_mmap *mm = &map->auxtrace_mmap; 1659 u64 head, old = mm->prev, offset, ref; 1660 unsigned char *data = mm->base; 1661 size_t size, head_off, old_off, len1, len2, padding; 1662 union perf_event ev; 1663 void *data1, *data2; 1664 1665 if (snapshot) { 1666 head = auxtrace_mmap__read_snapshot_head(mm); 1667 if (auxtrace_record__find_snapshot(itr, mm->idx, mm, data, 1668 &head, &old)) 1669 return -1; 1670 } else { 1671 head = auxtrace_mmap__read_head(mm); 1672 } 1673 1674 if (old == head) 1675 return 0; 1676 1677 pr_debug3("auxtrace idx %d old %#"PRIx64" head %#"PRIx64" diff %#"PRIx64"\n", 1678 mm->idx, old, head, head - old); 1679 1680 if (mm->mask) { 1681 head_off = head & mm->mask; 1682 old_off = old & mm->mask; 1683 } else { 1684 head_off = head % mm->len; 1685 old_off = old % mm->len; 1686 } 1687 1688 if (head_off > old_off) 1689 size = head_off - old_off; 1690 else 1691 size = mm->len - (old_off - head_off); 1692 1693 if (snapshot && size > snapshot_size) 1694 size = snapshot_size; 1695 1696 ref = auxtrace_record__reference(itr); 1697 1698 if (head > old || size <= head || mm->mask) { 1699 offset = head - size; 1700 } else { 1701 /* 1702 * When the buffer size is not a power of 2, 'head' wraps at the 1703 * highest multiple of the buffer size, so we have to subtract 1704 * the remainder here. 1705 */ 1706 u64 rem = (0ULL - mm->len) % mm->len; 1707 1708 offset = head - size - rem; 1709 } 1710 1711 if (size > head_off) { 1712 len1 = size - head_off; 1713 data1 = &data[mm->len - len1]; 1714 len2 = head_off; 1715 data2 = &data[0]; 1716 } else { 1717 len1 = size; 1718 data1 = &data[head_off - len1]; 1719 len2 = 0; 1720 data2 = NULL; 1721 } 1722 1723 if (itr->alignment) { 1724 unsigned int unwanted = len1 % itr->alignment; 1725 1726 len1 -= unwanted; 1727 size -= unwanted; 1728 } 1729 1730 /* padding must be written by fn() e.g. record__process_auxtrace() */ 1731 padding = size & (PERF_AUXTRACE_RECORD_ALIGNMENT - 1); 1732 if (padding) 1733 padding = PERF_AUXTRACE_RECORD_ALIGNMENT - padding; 1734 1735 memset(&ev, 0, sizeof(ev)); 1736 ev.auxtrace.header.type = PERF_RECORD_AUXTRACE; 1737 ev.auxtrace.header.size = sizeof(ev.auxtrace); 1738 ev.auxtrace.size = size + padding; 1739 ev.auxtrace.offset = offset; 1740 ev.auxtrace.reference = ref; 1741 ev.auxtrace.idx = mm->idx; 1742 ev.auxtrace.tid = mm->tid; 1743 ev.auxtrace.cpu = mm->cpu; 1744 1745 if (fn(tool, map, &ev, data1, len1, data2, len2)) 1746 return -1; 1747 1748 mm->prev = head; 1749 1750 if (!snapshot) { 1751 auxtrace_mmap__write_tail(mm, head); 1752 if (itr->read_finish) { 1753 int err; 1754 1755 err = itr->read_finish(itr, mm->idx); 1756 if (err < 0) 1757 return err; 1758 } 1759 } 1760 1761 return 1; 1762} 1763 1764int auxtrace_mmap__read(struct mmap *map, struct auxtrace_record *itr, 1765 struct perf_tool *tool, process_auxtrace_t fn) 1766{ 1767 return __auxtrace_mmap__read(map, itr, tool, fn, false, 0); 1768} 1769 1770int auxtrace_mmap__read_snapshot(struct mmap *map, 1771 struct auxtrace_record *itr, 1772 struct perf_tool *tool, process_auxtrace_t fn, 1773 size_t snapshot_size) 1774{ 1775 return __auxtrace_mmap__read(map, itr, tool, fn, true, snapshot_size); 1776} 1777 1778/** 1779 * struct auxtrace_cache - hash table to implement a cache 1780 * @hashtable: the hashtable 1781 * @sz: hashtable size (number of hlists) 1782 * @entry_size: size of an entry 1783 * @limit: limit the number of entries to this maximum, when reached the cache 1784 * is dropped and caching begins again with an empty cache 1785 * @cnt: current number of entries 1786 * @bits: hashtable size (@sz = 2^@bits) 1787 */ 1788struct auxtrace_cache { 1789 struct hlist_head *hashtable; 1790 size_t sz; 1791 size_t entry_size; 1792 size_t limit; 1793 size_t cnt; 1794 unsigned int bits; 1795}; 1796 1797struct auxtrace_cache *auxtrace_cache__new(unsigned int bits, size_t entry_size, 1798 unsigned int limit_percent) 1799{ 1800 struct auxtrace_cache *c; 1801 struct hlist_head *ht; 1802 size_t sz, i; 1803 1804 c = zalloc(sizeof(struct auxtrace_cache)); 1805 if (!c) 1806 return NULL; 1807 1808 sz = 1UL << bits; 1809 1810 ht = calloc(sz, sizeof(struct hlist_head)); 1811 if (!ht) 1812 goto out_free; 1813 1814 for (i = 0; i < sz; i++) 1815 INIT_HLIST_HEAD(&ht[i]); 1816 1817 c->hashtable = ht; 1818 c->sz = sz; 1819 c->entry_size = entry_size; 1820 c->limit = (c->sz * limit_percent) / 100; 1821 c->bits = bits; 1822 1823 return c; 1824 1825out_free: 1826 free(c); 1827 return NULL; 1828} 1829 1830static void auxtrace_cache__drop(struct auxtrace_cache *c) 1831{ 1832 struct auxtrace_cache_entry *entry; 1833 struct hlist_node *tmp; 1834 size_t i; 1835 1836 if (!c) 1837 return; 1838 1839 for (i = 0; i < c->sz; i++) { 1840 hlist_for_each_entry_safe(entry, tmp, &c->hashtable[i], hash) { 1841 hlist_del(&entry->hash); 1842 auxtrace_cache__free_entry(c, entry); 1843 } 1844 } 1845 1846 c->cnt = 0; 1847} 1848 1849void auxtrace_cache__free(struct auxtrace_cache *c) 1850{ 1851 if (!c) 1852 return; 1853 1854 auxtrace_cache__drop(c); 1855 zfree(&c->hashtable); 1856 free(c); 1857} 1858 1859void *auxtrace_cache__alloc_entry(struct auxtrace_cache *c) 1860{ 1861 return malloc(c->entry_size); 1862} 1863 1864void auxtrace_cache__free_entry(struct auxtrace_cache *c __maybe_unused, 1865 void *entry) 1866{ 1867 free(entry); 1868} 1869 1870int auxtrace_cache__add(struct auxtrace_cache *c, u32 key, 1871 struct auxtrace_cache_entry *entry) 1872{ 1873 if (c->limit && ++c->cnt > c->limit) 1874 auxtrace_cache__drop(c); 1875 1876 entry->key = key; 1877 hlist_add_head(&entry->hash, &c->hashtable[hash_32(key, c->bits)]); 1878 1879 return 0; 1880} 1881 1882static struct auxtrace_cache_entry *auxtrace_cache__rm(struct auxtrace_cache *c, 1883 u32 key) 1884{ 1885 struct auxtrace_cache_entry *entry; 1886 struct hlist_head *hlist; 1887 struct hlist_node *n; 1888 1889 if (!c) 1890 return NULL; 1891 1892 hlist = &c->hashtable[hash_32(key, c->bits)]; 1893 hlist_for_each_entry_safe(entry, n, hlist, hash) { 1894 if (entry->key == key) { 1895 hlist_del(&entry->hash); 1896 return entry; 1897 } 1898 } 1899 1900 return NULL; 1901} 1902 1903void auxtrace_cache__remove(struct auxtrace_cache *c, u32 key) 1904{ 1905 struct auxtrace_cache_entry *entry = auxtrace_cache__rm(c, key); 1906 1907 auxtrace_cache__free_entry(c, entry); 1908} 1909 1910void *auxtrace_cache__lookup(struct auxtrace_cache *c, u32 key) 1911{ 1912 struct auxtrace_cache_entry *entry; 1913 struct hlist_head *hlist; 1914 1915 if (!c) 1916 return NULL; 1917 1918 hlist = &c->hashtable[hash_32(key, c->bits)]; 1919 hlist_for_each_entry(entry, hlist, hash) { 1920 if (entry->key == key) 1921 return entry; 1922 } 1923 1924 return NULL; 1925} 1926 1927static void addr_filter__free_str(struct addr_filter *filt) 1928{ 1929 zfree(&filt->str); 1930 filt->action = NULL; 1931 filt->sym_from = NULL; 1932 filt->sym_to = NULL; 1933 filt->filename = NULL; 1934} 1935 1936static struct addr_filter *addr_filter__new(void) 1937{ 1938 struct addr_filter *filt = zalloc(sizeof(*filt)); 1939 1940 if (filt) 1941 INIT_LIST_HEAD(&filt->list); 1942 1943 return filt; 1944} 1945 1946static void addr_filter__free(struct addr_filter *filt) 1947{ 1948 if (filt) 1949 addr_filter__free_str(filt); 1950 free(filt); 1951} 1952 1953static void addr_filters__add(struct addr_filters *filts, 1954 struct addr_filter *filt) 1955{ 1956 list_add_tail(&filt->list, &filts->head); 1957 filts->cnt += 1; 1958} 1959 1960static void addr_filters__del(struct addr_filters *filts, 1961 struct addr_filter *filt) 1962{ 1963 list_del_init(&filt->list); 1964 filts->cnt -= 1; 1965} 1966 1967void addr_filters__init(struct addr_filters *filts) 1968{ 1969 INIT_LIST_HEAD(&filts->head); 1970 filts->cnt = 0; 1971} 1972 1973void addr_filters__exit(struct addr_filters *filts) 1974{ 1975 struct addr_filter *filt, *n; 1976 1977 list_for_each_entry_safe(filt, n, &filts->head, list) { 1978 addr_filters__del(filts, filt); 1979 addr_filter__free(filt); 1980 } 1981} 1982 1983static int parse_num_or_str(char **inp, u64 *num, const char **str, 1984 const char *str_delim) 1985{ 1986 *inp += strspn(*inp, " "); 1987 1988 if (isdigit(**inp)) { 1989 char *endptr; 1990 1991 if (!num) 1992 return -EINVAL; 1993 errno = 0; 1994 *num = strtoull(*inp, &endptr, 0); 1995 if (errno) 1996 return -errno; 1997 if (endptr == *inp) 1998 return -EINVAL; 1999 *inp = endptr; 2000 } else { 2001 size_t n; 2002 2003 if (!str) 2004 return -EINVAL; 2005 *inp += strspn(*inp, " "); 2006 *str = *inp; 2007 n = strcspn(*inp, str_delim); 2008 if (!n) 2009 return -EINVAL; 2010 *inp += n; 2011 if (**inp) { 2012 **inp = '\0'; 2013 *inp += 1; 2014 } 2015 } 2016 return 0; 2017} 2018 2019static int parse_action(struct addr_filter *filt) 2020{ 2021 if (!strcmp(filt->action, "filter")) { 2022 filt->start = true; 2023 filt->range = true; 2024 } else if (!strcmp(filt->action, "start")) { 2025 filt->start = true; 2026 } else if (!strcmp(filt->action, "stop")) { 2027 filt->start = false; 2028 } else if (!strcmp(filt->action, "tracestop")) { 2029 filt->start = false; 2030 filt->range = true; 2031 filt->action += 5; /* Change 'tracestop' to 'stop' */ 2032 } else { 2033 return -EINVAL; 2034 } 2035 return 0; 2036} 2037 2038static int parse_sym_idx(char **inp, int *idx) 2039{ 2040 *idx = -1; 2041 2042 *inp += strspn(*inp, " "); 2043 2044 if (**inp != '#') 2045 return 0; 2046 2047 *inp += 1; 2048 2049 if (**inp == 'g' || **inp == 'G') { 2050 *inp += 1; 2051 *idx = 0; 2052 } else { 2053 unsigned long num; 2054 char *endptr; 2055 2056 errno = 0; 2057 num = strtoul(*inp, &endptr, 0); 2058 if (errno) 2059 return -errno; 2060 if (endptr == *inp || num > INT_MAX) 2061 return -EINVAL; 2062 *inp = endptr; 2063 *idx = num; 2064 } 2065 2066 return 0; 2067} 2068 2069static int parse_addr_size(char **inp, u64 *num, const char **str, int *idx) 2070{ 2071 int err = parse_num_or_str(inp, num, str, " "); 2072 2073 if (!err && *str) 2074 err = parse_sym_idx(inp, idx); 2075 2076 return err; 2077} 2078 2079static int parse_one_filter(struct addr_filter *filt, const char **filter_inp) 2080{ 2081 char *fstr; 2082 int err; 2083 2084 filt->str = fstr = strdup(*filter_inp); 2085 if (!fstr) 2086 return -ENOMEM; 2087 2088 err = parse_num_or_str(&fstr, NULL, &filt->action, " "); 2089 if (err) 2090 goto out_err; 2091 2092 err = parse_action(filt); 2093 if (err) 2094 goto out_err; 2095 2096 err = parse_addr_size(&fstr, &filt->addr, &filt->sym_from, 2097 &filt->sym_from_idx); 2098 if (err) 2099 goto out_err; 2100 2101 fstr += strspn(fstr, " "); 2102 2103 if (*fstr == '/') { 2104 fstr += 1; 2105 err = parse_addr_size(&fstr, &filt->size, &filt->sym_to, 2106 &filt->sym_to_idx); 2107 if (err) 2108 goto out_err; 2109 filt->range = true; 2110 } 2111 2112 fstr += strspn(fstr, " "); 2113 2114 if (*fstr == '@') { 2115 fstr += 1; 2116 err = parse_num_or_str(&fstr, NULL, &filt->filename, " ,"); 2117 if (err) 2118 goto out_err; 2119 } 2120 2121 fstr += strspn(fstr, " ,"); 2122 2123 *filter_inp += fstr - filt->str; 2124 2125 return 0; 2126 2127out_err: 2128 addr_filter__free_str(filt); 2129 2130 return err; 2131} 2132 2133int addr_filters__parse_bare_filter(struct addr_filters *filts, 2134 const char *filter) 2135{ 2136 struct addr_filter *filt; 2137 const char *fstr = filter; 2138 int err; 2139 2140 while (*fstr) { 2141 filt = addr_filter__new(); 2142 err = parse_one_filter(filt, &fstr); 2143 if (err) { 2144 addr_filter__free(filt); 2145 addr_filters__exit(filts); 2146 return err; 2147 } 2148 addr_filters__add(filts, filt); 2149 } 2150 2151 return 0; 2152} 2153 2154struct sym_args { 2155 const char *name; 2156 u64 start; 2157 u64 size; 2158 int idx; 2159 int cnt; 2160 bool started; 2161 bool global; 2162 bool selected; 2163 bool duplicate; 2164 bool near; 2165}; 2166 2167static bool kern_sym_name_match(const char *kname, const char *name) 2168{ 2169 size_t n = strlen(name); 2170 2171 return !strcmp(kname, name) || 2172 (!strncmp(kname, name, n) && kname[n] == '\t'); 2173} 2174 2175static bool kern_sym_match(struct sym_args *args, const char *name, char type) 2176{ 2177 /* A function with the same name, and global or the n'th found or any */ 2178 return kallsyms__is_function(type) && 2179 kern_sym_name_match(name, args->name) && 2180 ((args->global && isupper(type)) || 2181 (args->selected && ++(args->cnt) == args->idx) || 2182 (!args->global && !args->selected)); 2183} 2184 2185static int find_kern_sym_cb(void *arg, const char *name, char type, u64 start) 2186{ 2187 struct sym_args *args = arg; 2188 2189 if (args->started) { 2190 if (!args->size) 2191 args->size = start - args->start; 2192 if (args->selected) { 2193 if (args->size) 2194 return 1; 2195 } else if (kern_sym_match(args, name, type)) { 2196 args->duplicate = true; 2197 return 1; 2198 } 2199 } else if (kern_sym_match(args, name, type)) { 2200 args->started = true; 2201 args->start = start; 2202 } 2203 2204 return 0; 2205} 2206 2207static int print_kern_sym_cb(void *arg, const char *name, char type, u64 start) 2208{ 2209 struct sym_args *args = arg; 2210 2211 if (kern_sym_match(args, name, type)) { 2212 pr_err("#%d\t0x%"PRIx64"\t%c\t%s\n", 2213 ++args->cnt, start, type, name); 2214 args->near = true; 2215 } else if (args->near) { 2216 args->near = false; 2217 pr_err("\t\twhich is near\t\t%s\n", name); 2218 } 2219 2220 return 0; 2221} 2222 2223static int sym_not_found_error(const char *sym_name, int idx) 2224{ 2225 if (idx > 0) { 2226 pr_err("N'th occurrence (N=%d) of symbol '%s' not found.\n", 2227 idx, sym_name); 2228 } else if (!idx) { 2229 pr_err("Global symbol '%s' not found.\n", sym_name); 2230 } else { 2231 pr_err("Symbol '%s' not found.\n", sym_name); 2232 } 2233 pr_err("Note that symbols must be functions.\n"); 2234 2235 return -EINVAL; 2236} 2237 2238static int find_kern_sym(const char *sym_name, u64 *start, u64 *size, int idx) 2239{ 2240 struct sym_args args = { 2241 .name = sym_name, 2242 .idx = idx, 2243 .global = !idx, 2244 .selected = idx > 0, 2245 }; 2246 int err; 2247 2248 *start = 0; 2249 *size = 0; 2250 2251 err = kallsyms__parse("/proc/kallsyms", &args, find_kern_sym_cb); 2252 if (err < 0) { 2253 pr_err("Failed to parse /proc/kallsyms\n"); 2254 return err; 2255 } 2256 2257 if (args.duplicate) { 2258 pr_err("Multiple kernel symbols with name '%s'\n", sym_name); 2259 args.cnt = 0; 2260 kallsyms__parse("/proc/kallsyms", &args, print_kern_sym_cb); 2261 pr_err("Disambiguate symbol name by inserting #n after the name e.g. %s #2\n", 2262 sym_name); 2263 pr_err("Or select a global symbol by inserting #0 or #g or #G\n"); 2264 return -EINVAL; 2265 } 2266 2267 if (!args.started) { 2268 pr_err("Kernel symbol lookup: "); 2269 return sym_not_found_error(sym_name, idx); 2270 } 2271 2272 *start = args.start; 2273 *size = args.size; 2274 2275 return 0; 2276} 2277 2278static int find_entire_kern_cb(void *arg, const char *name __maybe_unused, 2279 char type, u64 start) 2280{ 2281 struct sym_args *args = arg; 2282 u64 size; 2283 2284 if (!kallsyms__is_function(type)) 2285 return 0; 2286 2287 if (!args->started) { 2288 args->started = true; 2289 args->start = start; 2290 } 2291 /* Don't know exactly where the kernel ends, so we add a page */ 2292 size = round_up(start, page_size) + page_size - args->start; 2293 if (size > args->size) 2294 args->size = size; 2295 2296 return 0; 2297} 2298 2299static int addr_filter__entire_kernel(struct addr_filter *filt) 2300{ 2301 struct sym_args args = { .started = false }; 2302 int err; 2303 2304 err = kallsyms__parse("/proc/kallsyms", &args, find_entire_kern_cb); 2305 if (err < 0 || !args.started) { 2306 pr_err("Failed to parse /proc/kallsyms\n"); 2307 return err; 2308 } 2309 2310 filt->addr = args.start; 2311 filt->size = args.size; 2312 2313 return 0; 2314} 2315 2316static int check_end_after_start(struct addr_filter *filt, u64 start, u64 size) 2317{ 2318 if (start + size >= filt->addr) 2319 return 0; 2320 2321 if (filt->sym_from) { 2322 pr_err("Symbol '%s' (0x%"PRIx64") comes before '%s' (0x%"PRIx64")\n", 2323 filt->sym_to, start, filt->sym_from, filt->addr); 2324 } else { 2325 pr_err("Symbol '%s' (0x%"PRIx64") comes before address 0x%"PRIx64")\n", 2326 filt->sym_to, start, filt->addr); 2327 } 2328 2329 return -EINVAL; 2330} 2331 2332static int addr_filter__resolve_kernel_syms(struct addr_filter *filt) 2333{ 2334 bool no_size = false; 2335 u64 start, size; 2336 int err; 2337 2338 if (symbol_conf.kptr_restrict) { 2339 pr_err("Kernel addresses are restricted. Unable to resolve kernel symbols.\n"); 2340 return -EINVAL; 2341 } 2342 2343 if (filt->sym_from && !strcmp(filt->sym_from, "*")) 2344 return addr_filter__entire_kernel(filt); 2345 2346 if (filt->sym_from) { 2347 err = find_kern_sym(filt->sym_from, &start, &size, 2348 filt->sym_from_idx); 2349 if (err) 2350 return err; 2351 filt->addr = start; 2352 if (filt->range && !filt->size && !filt->sym_to) { 2353 filt->size = size; 2354 no_size = !size; 2355 } 2356 } 2357 2358 if (filt->sym_to) { 2359 err = find_kern_sym(filt->sym_to, &start, &size, 2360 filt->sym_to_idx); 2361 if (err) 2362 return err; 2363 2364 err = check_end_after_start(filt, start, size); 2365 if (err) 2366 return err; 2367 filt->size = start + size - filt->addr; 2368 no_size = !size; 2369 } 2370 2371 /* The very last symbol in kallsyms does not imply a particular size */ 2372 if (no_size) { 2373 pr_err("Cannot determine size of symbol '%s'\n", 2374 filt->sym_to ? filt->sym_to : filt->sym_from); 2375 return -EINVAL; 2376 } 2377 2378 return 0; 2379} 2380 2381static struct dso *load_dso(const char *name) 2382{ 2383 struct map *map; 2384 struct dso *dso; 2385 2386 map = dso__new_map(name); 2387 if (!map) 2388 return NULL; 2389 2390 if (map__load(map) < 0) 2391 pr_err("File '%s' not found or has no symbols.\n", name); 2392 2393 dso = dso__get(map->dso); 2394 2395 map__put(map); 2396 2397 return dso; 2398} 2399 2400static bool dso_sym_match(struct symbol *sym, const char *name, int *cnt, 2401 int idx) 2402{ 2403 /* Same name, and global or the n'th found or any */ 2404 return !arch__compare_symbol_names(name, sym->name) && 2405 ((!idx && sym->binding == STB_GLOBAL) || 2406 (idx > 0 && ++*cnt == idx) || 2407 idx < 0); 2408} 2409 2410static void print_duplicate_syms(struct dso *dso, const char *sym_name) 2411{ 2412 struct symbol *sym; 2413 bool near = false; 2414 int cnt = 0; 2415 2416 pr_err("Multiple symbols with name '%s'\n", sym_name); 2417 2418 sym = dso__first_symbol(dso); 2419 while (sym) { 2420 if (dso_sym_match(sym, sym_name, &cnt, -1)) { 2421 pr_err("#%d\t0x%"PRIx64"\t%c\t%s\n", 2422 ++cnt, sym->start, 2423 sym->binding == STB_GLOBAL ? 'g' : 2424 sym->binding == STB_LOCAL ? 'l' : 'w', 2425 sym->name); 2426 near = true; 2427 } else if (near) { 2428 near = false; 2429 pr_err("\t\twhich is near\t\t%s\n", sym->name); 2430 } 2431 sym = dso__next_symbol(sym); 2432 } 2433 2434 pr_err("Disambiguate symbol name by inserting #n after the name e.g. %s #2\n", 2435 sym_name); 2436 pr_err("Or select a global symbol by inserting #0 or #g or #G\n"); 2437} 2438 2439static int find_dso_sym(struct dso *dso, const char *sym_name, u64 *start, 2440 u64 *size, int idx) 2441{ 2442 struct symbol *sym; 2443 int cnt = 0; 2444 2445 *start = 0; 2446 *size = 0; 2447 2448 sym = dso__first_symbol(dso); 2449 while (sym) { 2450 if (*start) { 2451 if (!*size) 2452 *size = sym->start - *start; 2453 if (idx > 0) { 2454 if (*size) 2455 return 0; 2456 } else if (dso_sym_match(sym, sym_name, &cnt, idx)) { 2457 print_duplicate_syms(dso, sym_name); 2458 return -EINVAL; 2459 } 2460 } else if (dso_sym_match(sym, sym_name, &cnt, idx)) { 2461 *start = sym->start; 2462 *size = sym->end - sym->start; 2463 } 2464 sym = dso__next_symbol(sym); 2465 } 2466 2467 if (!*start) 2468 return sym_not_found_error(sym_name, idx); 2469 2470 return 0; 2471} 2472 2473static int addr_filter__entire_dso(struct addr_filter *filt, struct dso *dso) 2474{ 2475 if (dso__data_file_size(dso, NULL)) { 2476 pr_err("Failed to determine filter for %s\nCannot determine file size.\n", 2477 filt->filename); 2478 return -EINVAL; 2479 } 2480 2481 filt->addr = 0; 2482 filt->size = dso->data.file_size; 2483 2484 return 0; 2485} 2486 2487static int addr_filter__resolve_syms(struct addr_filter *filt) 2488{ 2489 u64 start, size; 2490 struct dso *dso; 2491 int err = 0; 2492 2493 if (!filt->sym_from && !filt->sym_to) 2494 return 0; 2495 2496 if (!filt->filename) 2497 return addr_filter__resolve_kernel_syms(filt); 2498 2499 dso = load_dso(filt->filename); 2500 if (!dso) { 2501 pr_err("Failed to load symbols from: %s\n", filt->filename); 2502 return -EINVAL; 2503 } 2504 2505 if (filt->sym_from && !strcmp(filt->sym_from, "*")) { 2506 err = addr_filter__entire_dso(filt, dso); 2507 goto put_dso; 2508 } 2509 2510 if (filt->sym_from) { 2511 err = find_dso_sym(dso, filt->sym_from, &start, &size, 2512 filt->sym_from_idx); 2513 if (err) 2514 goto put_dso; 2515 filt->addr = start; 2516 if (filt->range && !filt->size && !filt->sym_to) 2517 filt->size = size; 2518 } 2519 2520 if (filt->sym_to) { 2521 err = find_dso_sym(dso, filt->sym_to, &start, &size, 2522 filt->sym_to_idx); 2523 if (err) 2524 goto put_dso; 2525 2526 err = check_end_after_start(filt, start, size); 2527 if (err) 2528 return err; 2529 2530 filt->size = start + size - filt->addr; 2531 } 2532 2533put_dso: 2534 dso__put(dso); 2535 2536 return err; 2537} 2538 2539static char *addr_filter__to_str(struct addr_filter *filt) 2540{ 2541 char filename_buf[PATH_MAX]; 2542 const char *at = ""; 2543 const char *fn = ""; 2544 char *filter; 2545 int err; 2546 2547 if (filt->filename) { 2548 at = "@"; 2549 fn = realpath(filt->filename, filename_buf); 2550 if (!fn) 2551 return NULL; 2552 } 2553 2554 if (filt->range) { 2555 err = asprintf(&filter, "%s 0x%"PRIx64"/0x%"PRIx64"%s%s", 2556 filt->action, filt->addr, filt->size, at, fn); 2557 } else { 2558 err = asprintf(&filter, "%s 0x%"PRIx64"%s%s", 2559 filt->action, filt->addr, at, fn); 2560 } 2561 2562 return err < 0 ? NULL : filter; 2563} 2564 2565static int parse_addr_filter(struct evsel *evsel, const char *filter, 2566 int max_nr) 2567{ 2568 struct addr_filters filts; 2569 struct addr_filter *filt; 2570 int err; 2571 2572 addr_filters__init(&filts); 2573 2574 err = addr_filters__parse_bare_filter(&filts, filter); 2575 if (err) 2576 goto out_exit; 2577 2578 if (filts.cnt > max_nr) { 2579 pr_err("Error: number of address filters (%d) exceeds maximum (%d)\n", 2580 filts.cnt, max_nr); 2581 err = -EINVAL; 2582 goto out_exit; 2583 } 2584 2585 list_for_each_entry(filt, &filts.head, list) { 2586 char *new_filter; 2587 2588 err = addr_filter__resolve_syms(filt); 2589 if (err) 2590 goto out_exit; 2591 2592 new_filter = addr_filter__to_str(filt); 2593 if (!new_filter) { 2594 err = -ENOMEM; 2595 goto out_exit; 2596 } 2597 2598 if (evsel__append_addr_filter(evsel, new_filter)) { 2599 err = -ENOMEM; 2600 goto out_exit; 2601 } 2602 } 2603 2604out_exit: 2605 addr_filters__exit(&filts); 2606 2607 if (err) { 2608 pr_err("Failed to parse address filter: '%s'\n", filter); 2609 pr_err("Filter format is: filter|start|stop|tracestop <start symbol or address> [/ <end symbol or size>] [@<file name>]\n"); 2610 pr_err("Where multiple filters are separated by space or comma.\n"); 2611 } 2612 2613 return err; 2614} 2615 2616static int evsel__nr_addr_filter(struct evsel *evsel) 2617{ 2618 struct perf_pmu *pmu = evsel__find_pmu(evsel); 2619 int nr_addr_filters = 0; 2620 2621 if (!pmu) 2622 return 0; 2623 2624 perf_pmu__scan_file(pmu, "nr_addr_filters", "%d", &nr_addr_filters); 2625 2626 return nr_addr_filters; 2627} 2628 2629int auxtrace_parse_filters(struct evlist *evlist) 2630{ 2631 struct evsel *evsel; 2632 char *filter; 2633 int err, max_nr; 2634 2635 evlist__for_each_entry(evlist, evsel) { 2636 filter = evsel->filter; 2637 max_nr = evsel__nr_addr_filter(evsel); 2638 if (!filter || !max_nr) 2639 continue; 2640 evsel->filter = NULL; 2641 err = parse_addr_filter(evsel, filter, max_nr); 2642 free(filter); 2643 if (err) 2644 return err; 2645 pr_debug("Address filter: %s\n", evsel->filter); 2646 } 2647 2648 return 0; 2649} 2650 2651int auxtrace__process_event(struct perf_session *session, union perf_event *event, 2652 struct perf_sample *sample, struct perf_tool *tool) 2653{ 2654 if (!session->auxtrace) 2655 return 0; 2656 2657 return session->auxtrace->process_event(session, event, sample, tool); 2658} 2659 2660void auxtrace__dump_auxtrace_sample(struct perf_session *session, 2661 struct perf_sample *sample) 2662{ 2663 if (!session->auxtrace || !session->auxtrace->dump_auxtrace_sample || 2664 auxtrace__dont_decode(session)) 2665 return; 2666 2667 session->auxtrace->dump_auxtrace_sample(session, sample); 2668} 2669 2670int auxtrace__flush_events(struct perf_session *session, struct perf_tool *tool) 2671{ 2672 if (!session->auxtrace) 2673 return 0; 2674 2675 return session->auxtrace->flush_events(session, tool); 2676} 2677 2678void auxtrace__free_events(struct perf_session *session) 2679{ 2680 if (!session->auxtrace) 2681 return; 2682 2683 return session->auxtrace->free_events(session); 2684} 2685 2686void auxtrace__free(struct perf_session *session) 2687{ 2688 if (!session->auxtrace) 2689 return; 2690 2691 return session->auxtrace->free(session); 2692} 2693 2694bool auxtrace__evsel_is_auxtrace(struct perf_session *session, 2695 struct evsel *evsel) 2696{ 2697 if (!session->auxtrace || !session->auxtrace->evsel_is_auxtrace) 2698 return false; 2699 2700 return session->auxtrace->evsel_is_auxtrace(session, evsel); 2701} 2702