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