tools/perf/util/auxtrace.c

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