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 "evsel_config.h"
  35 #include "symbol.h"
  36 #include "util/synthetic-events.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 "record.h"
  45 #include "session.h"
  46 #include "debug.h"
  47 #include <subcmd/parse-options.h>
  48
  49 #include "cs-etm.h"
  50 #include "intel-pt.h"
  51 #include "intel-bts.h"
  52 #include "arm-spe.h"
  53 #include "s390-cpumsf.h"
  54 #include "util/mmap.h"
  55
  56 #include <linux/ctype.h>
  57 #include <linux/kernel.h>
  58 #include "symbol/kallsyms.h"
  59 #include <internal/lib.h>
  60
  61 static struct perf_pmu *perf_evsel__find_pmu(struct evsel *evsel)
  62 {
  63         struct perf_pmu *pmu = NULL;
  64
  65         while ((pmu = perf_pmu__scan(pmu)) != NULL) {
  66                 if (pmu->type == evsel->core.attr.type)
  67                         break;
  68         }
  69
  70         return pmu;
  71 }
  72
  73 static bool perf_evsel__is_aux_event(struct evsel *evsel)
  74 {
  75         struct perf_pmu *pmu = perf_evsel__find_pmu(evsel);
  76
  77         return pmu && pmu->auxtrace;
  78 }
  79
  80 /*
  81  * Make a group from 'leader' to 'last', requiring that the events were not
  82  * already grouped to a different leader.
  83  */
  84 static int perf_evlist__regroup(struct evlist *evlist,
  85                                 struct evsel *leader,
  86                                 struct evsel *last)
  87 {
  88         struct evsel *evsel;
  89         bool grp;
  90
  91         if (!perf_evsel__is_group_leader(leader))
  92                 return -EINVAL;
  93
  94         grp = false;
  95         evlist__for_each_entry(evlist, evsel) {
  96                 if (grp) {
  97                         if (!(evsel->leader == leader ||
  98                              (evsel->leader == evsel &&
  99                               evsel->core.nr_members <= 1)))
 100                                 return -EINVAL;
 101                 } else if (evsel == leader) {
 102                         grp = true;
 103                 }
 104                 if (evsel == last)
 105                         break;
 106         }
 107
 108         grp = false;
 109         evlist__for_each_entry(evlist, evsel) {
 110                 if (grp) {
 111                         if (evsel->leader != leader) {
 112                                 evsel->leader = leader;
 113                                 if (leader->core.nr_members < 1)
 114                                         leader->core.nr_members = 1;
 115                                 leader->core.nr_members += 1;
 116                         }
 117                 } else if (evsel == leader) {
 118                         grp = true;
 119                 }
 120                 if (evsel == last)
 121                         break;
 122         }
 123
 124         return 0;
 125 }
 126
 127 static bool auxtrace__dont_decode(struct perf_session *session)
 128 {
 129         return !session->itrace_synth_opts ||
 130                session->itrace_synth_opts->dont_decode;
 131 }
 132
 133 int auxtrace_mmap__mmap(struct auxtrace_mmap *mm,
 134                         struct auxtrace_mmap_params *mp,
 135                         void *userpg, int fd)
 136 {
 137         struct perf_event_mmap_page *pc = userpg;
 138
 139         WARN_ONCE(mm->base, "Uninitialized auxtrace_mmap\n");
 140
 141         mm->userpg = userpg;
 142         mm->mask = mp->mask;
 143         mm->len = mp->len;
 144         mm->prev = 0;
 145         mm->idx = mp->idx;
 146         mm->tid = mp->tid;
 147         mm->cpu = mp->cpu;
 148
 149         if (!mp->len) {
 150                 mm->base = NULL;
 151                 return 0;
 152         }
 153
 154 #if BITS_PER_LONG != 64 && !defined(HAVE_SYNC_COMPARE_AND_SWAP_SUPPORT)
 155         pr_err("Cannot use AUX area tracing mmaps\n");
 156         return -1;
 157 #endif
 158
 159         pc->aux_offset = mp->offset;
 160         pc->aux_size = mp->len;
 161
 162         mm->base = mmap(NULL, mp->len, mp->prot, MAP_SHARED, fd, mp->offset);
 163         if (mm->base == MAP_FAILED) {
 164                 pr_debug2("failed to mmap AUX area\n");
 165                 mm->base = NULL;
 166                 return -1;
 167         }
 168
 169         return 0;
 170 }
 171
 172 void auxtrace_mmap__munmap(struct auxtrace_mmap *mm)
 173 {
 174         if (mm->base) {
 175                 munmap(mm->base, mm->len);
 176                 mm->base = NULL;
 177         }
 178 }
 179
 180 void auxtrace_mmap_params__init(struct auxtrace_mmap_params *mp,
 181                                 off_t auxtrace_offset,
 182                                 unsigned int auxtrace_pages,
 183                                 bool auxtrace_overwrite)
 184 {
 185         if (auxtrace_pages) {
 186                 mp->offset = auxtrace_offset;
 187                 mp->len = auxtrace_pages * (size_t)page_size;
 188                 mp->mask = is_power_of_2(mp->len) ? mp->len - 1 : 0;
 189                 mp->prot = PROT_READ | (auxtrace_overwrite ? 0 : PROT_WRITE);
 190                 pr_debug2("AUX area mmap length %zu\n", mp->len);
 191         } else {
 192                 mp->len = 0;
 193         }
 194 }
 195
 196 void auxtrace_mmap_params__set_idx(struct auxtrace_mmap_params *mp,
 197                                    struct evlist *evlist, int idx,
 198                                    bool per_cpu)
 199 {
 200         mp->idx = idx;
 201
 202         if (per_cpu) {
 203                 mp->cpu = evlist->core.cpus->map[idx];
 204                 if (evlist->core.threads)
 205                         mp->tid = perf_thread_map__pid(evlist->core.threads, 0);
 206                 else
 207                         mp->tid = -1;
 208         } else {
 209                 mp->cpu = -1;
 210                 mp->tid = perf_thread_map__pid(evlist->core.threads, idx);
 211         }
 212 }
 213
 214 #define AUXTRACE_INIT_NR_QUEUES 32
 215
 216 static struct auxtrace_queue *auxtrace_alloc_queue_array(unsigned int nr_queues)
 217 {
 218         struct auxtrace_queue *queue_array;
 219         unsigned int max_nr_queues, i;
 220
 221         max_nr_queues = UINT_MAX / sizeof(struct auxtrace_queue);
 222         if (nr_queues > max_nr_queues)
 223                 return NULL;
 224
 225         queue_array = calloc(nr_queues, sizeof(struct auxtrace_queue));
 226         if (!queue_array)
 227                 return NULL;
 228
 229         for (i = 0; i < nr_queues; i++) {
 230                 INIT_LIST_HEAD(&queue_array[i].head);
 231                 queue_array[i].priv = NULL;
 232         }
 233
 234         return queue_array;
 235 }
 236
 237 int auxtrace_queues__init(struct auxtrace_queues *queues)
 238 {
 239         queues->nr_queues = AUXTRACE_INIT_NR_QUEUES;
 240         queues->queue_array = auxtrace_alloc_queue_array(queues->nr_queues);
 241         if (!queues->queue_array)
 242                 return -ENOMEM;
 243         return 0;
 244 }
 245
 246 static int auxtrace_queues__grow(struct auxtrace_queues *queues,
 247                                  unsigned int new_nr_queues)
 248 {
 249         unsigned int nr_queues = queues->nr_queues;
 250         struct auxtrace_queue *queue_array;
 251         unsigned int i;
 252
 253         if (!nr_queues)
 254                 nr_queues = AUXTRACE_INIT_NR_QUEUES;
 255
 256         while (nr_queues && nr_queues < new_nr_queues)
 257                 nr_queues <<= 1;
 258
 259         if (nr_queues < queues->nr_queues || nr_queues < new_nr_queues)
 260                 return -EINVAL;
 261
 262         queue_array = auxtrace_alloc_queue_array(nr_queues);
 263         if (!queue_array)
 264                 return -ENOMEM;
 265
 266         for (i = 0; i < queues->nr_queues; i++) {
 267                 list_splice_tail(&queues->queue_array[i].head,
 268                                  &queue_array[i].head);
 269                 queue_array[i].tid = queues->queue_array[i].tid;
 270                 queue_array[i].cpu = queues->queue_array[i].cpu;
 271                 queue_array[i].set = queues->queue_array[i].set;
 272                 queue_array[i].priv = queues->queue_array[i].priv;
 273         }
 274
 275         queues->nr_queues = nr_queues;
 276         queues->queue_array = queue_array;
 277
 278         return 0;
 279 }
 280
 281 static void *auxtrace_copy_data(u64 size, struct perf_session *session)
 282 {
 283         int fd = perf_data__fd(session->data);
 284         void *p;
 285         ssize_t ret;
 286
 287         if (size > SSIZE_MAX)
 288                 return NULL;
 289
 290         p = malloc(size);
 291         if (!p)
 292                 return NULL;
 293
 294         ret = readn(fd, p, size);
 295         if (ret != (ssize_t)size) {
 296                 free(p);
 297                 return NULL;
 298         }
 299
 300         return p;
 301 }
 302
 303 static int auxtrace_queues__queue_buffer(struct auxtrace_queues *queues,
 304                                          unsigned int idx,
 305                                          struct auxtrace_buffer *buffer)
 306 {
 307         struct auxtrace_queue *queue;
 308         int err;
 309
 310         if (idx >= queues->nr_queues) {
 311                 err = auxtrace_queues__grow(queues, idx + 1);
 312                 if (err)
 313                         return err;
 314         }
 315
 316         queue = &queues->queue_array[idx];
 317
 318         if (!queue->set) {
 319                 queue->set = true;
 320                 queue->tid = buffer->tid;
 321                 queue->cpu = buffer->cpu;
 322         } else if (buffer->cpu != queue->cpu || buffer->tid != queue->tid) {
 323                 pr_err("auxtrace queue conflict: cpu %d, tid %d vs cpu %d, tid %d\n",
 324                        queue->cpu, queue->tid, buffer->cpu, buffer->tid);
 325                 return -EINVAL;
 326         }
 327
 328         buffer->buffer_nr = queues->next_buffer_nr++;
 329
 330         list_add_tail(&buffer->list, &queue->head);
 331
 332         queues->new_data = true;
 333         queues->populated = true;
 334
 335         return 0;
 336 }
 337
 338 /* Limit buffers to 32MiB on 32-bit */
 339 #define BUFFER_LIMIT_FOR_32_BIT (32 * 1024 * 1024)
 340
 341 static int auxtrace_queues__split_buffer(struct auxtrace_queues *queues,
 342                                          unsigned int idx,
 343                                          struct auxtrace_buffer *buffer)
 344 {
 345         u64 sz = buffer->size;
 346         bool consecutive = false;
 347         struct auxtrace_buffer *b;
 348         int err;
 349
 350         while (sz > BUFFER_LIMIT_FOR_32_BIT) {
 351                 b = memdup(buffer, sizeof(struct auxtrace_buffer));
 352                 if (!b)
 353                         return -ENOMEM;
 354                 b->size = BUFFER_LIMIT_FOR_32_BIT;
 355                 b->consecutive = consecutive;
 356                 err = auxtrace_queues__queue_buffer(queues, idx, b);
 357                 if (err) {
 358                         auxtrace_buffer__free(b);
 359                         return err;
 360                 }
 361                 buffer->data_offset += BUFFER_LIMIT_FOR_32_BIT;
 362                 sz -= BUFFER_LIMIT_FOR_32_BIT;
 363                 consecutive = true;
 364         }
 365
 366         buffer->size = sz;
 367         buffer->consecutive = consecutive;
 368
 369         return 0;
 370 }
 371
 372 static bool filter_cpu(struct perf_session *session, int cpu)
 373 {
 374         unsigned long *cpu_bitmap = session->itrace_synth_opts->cpu_bitmap;
 375
 376         return cpu_bitmap && cpu != -1 && !test_bit(cpu, cpu_bitmap);
 377 }
 378
 379 static int auxtrace_queues__add_buffer(struct auxtrace_queues *queues,
 380                                        struct perf_session *session,
 381                                        unsigned int idx,
 382                                        struct auxtrace_buffer *buffer,
 383                                        struct auxtrace_buffer **buffer_ptr)
 384 {
 385         int err = -ENOMEM;
 386
 387         if (filter_cpu(session, buffer->cpu))
 388                 return 0;
 389
 390         buffer = memdup(buffer, sizeof(*buffer));
 391         if (!buffer)
 392                 return -ENOMEM;
 393
 394         if (session->one_mmap) {
 395                 buffer->data = buffer->data_offset - session->one_mmap_offset +
 396                                session->one_mmap_addr;
 397         } else if (perf_data__is_pipe(session->data)) {
 398                 buffer->data = auxtrace_copy_data(buffer->size, session);
 399                 if (!buffer->data)
 400                         goto out_free;
 401                 buffer->data_needs_freeing = true;
 402         } else if (BITS_PER_LONG == 32 &&
 403                    buffer->size > BUFFER_LIMIT_FOR_32_BIT) {
 404                 err = auxtrace_queues__split_buffer(queues, idx, buffer);
 405                 if (err)
 406                         goto out_free;
 407         }
 408
 409         err = auxtrace_queues__queue_buffer(queues, idx, buffer);
 410         if (err)
 411                 goto out_free;
 412
 413         /* FIXME: Doesn't work for split buffer */
 414         if (buffer_ptr)
 415                 *buffer_ptr = buffer;
 416
 417         return 0;
 418
 419 out_free:
 420         auxtrace_buffer__free(buffer);
 421         return err;
 422 }
 423
 424 int auxtrace_queues__add_event(struct auxtrace_queues *queues,
 425                                struct perf_session *session,
 426                                union perf_event *event, off_t data_offset,
 427                                struct auxtrace_buffer **buffer_ptr)
 428 {
 429         struct auxtrace_buffer buffer = {
 430                 .pid = -1,
 431                 .tid = event->auxtrace.tid,
 432                 .cpu = event->auxtrace.cpu,
 433                 .data_offset = data_offset,
 434                 .offset = event->auxtrace.offset,
 435                 .reference = event->auxtrace.reference,
 436                 .size = event->auxtrace.size,
 437         };
 438         unsigned int idx = event->auxtrace.idx;
 439
 440         return auxtrace_queues__add_buffer(queues, session, idx, &buffer,
 441                                            buffer_ptr);
 442 }
 443
 444 static int auxtrace_queues__add_indexed_event(struct auxtrace_queues *queues,
 445                                               struct perf_session *session,
 446                                               off_t file_offset, size_t sz)
 447 {
 448         union perf_event *event;
 449         int err;
 450         char buf[PERF_SAMPLE_MAX_SIZE];
 451
 452         err = perf_session__peek_event(session, file_offset, buf,
 453                                        PERF_SAMPLE_MAX_SIZE, &event, NULL);
 454         if (err)
 455                 return err;
 456
 457         if (event->header.type == PERF_RECORD_AUXTRACE) {
 458                 if (event->header.size < sizeof(struct perf_record_auxtrace) ||
 459                     event->header.size != sz) {
 460                         err = -EINVAL;
 461                         goto out;
 462                 }
 463                 file_offset += event->header.size;
 464                 err = auxtrace_queues__add_event(queues, session, event,
 465                                                  file_offset, NULL);
 466         }
 467 out:
 468         return err;
 469 }
 470
 471 void auxtrace_queues__free(struct auxtrace_queues *queues)
 472 {
 473         unsigned int i;
 474
 475         for (i = 0; i < queues->nr_queues; i++) {
 476                 while (!list_empty(&queues->queue_array[i].head)) {
 477                         struct auxtrace_buffer *buffer;
 478
 479                         buffer = list_entry(queues->queue_array[i].head.next,
 480                                             struct auxtrace_buffer, list);
 481                         list_del_init(&buffer->list);
 482                         auxtrace_buffer__free(buffer);
 483                 }
 484         }
 485
 486         zfree(&queues->queue_array);
 487         queues->nr_queues = 0;
 488 }
 489
 490 static void auxtrace_heapify(struct auxtrace_heap_item *heap_array,
 491                              unsigned int pos, unsigned int queue_nr,
 492                              u64 ordinal)
 493 {
 494         unsigned int parent;
 495
 496         while (pos) {
 497                 parent = (pos - 1) >> 1;
 498                 if (heap_array[parent].ordinal <= ordinal)
 499                         break;
 500                 heap_array[pos] = heap_array[parent];
 501                 pos = parent;
 502         }
 503         heap_array[pos].queue_nr = queue_nr;
 504         heap_array[pos].ordinal = ordinal;
 505 }
 506
 507 int auxtrace_heap__add(struct auxtrace_heap *heap, unsigned int queue_nr,
 508                        u64 ordinal)
 509 {
 510         struct auxtrace_heap_item *heap_array;
 511
 512         if (queue_nr >= heap->heap_sz) {
 513                 unsigned int heap_sz = AUXTRACE_INIT_NR_QUEUES;
 514
 515                 while (heap_sz <= queue_nr)
 516                         heap_sz <<= 1;
 517                 heap_array = realloc(heap->heap_array,
 518                                      heap_sz * sizeof(struct auxtrace_heap_item));
 519                 if (!heap_array)
 520                         return -ENOMEM;
 521                 heap->heap_array = heap_array;
 522                 heap->heap_sz = heap_sz;
 523         }
 524
 525         auxtrace_heapify(heap->heap_array, heap->heap_cnt++, queue_nr, ordinal);
 526
 527         return 0;
 528 }
 529
 530 void auxtrace_heap__free(struct auxtrace_heap *heap)
 531 {
 532         zfree(&heap->heap_array);
 533         heap->heap_cnt = 0;
 534         heap->heap_sz = 0;
 535 }
 536
 537 void auxtrace_heap__pop(struct auxtrace_heap *heap)
 538 {
 539         unsigned int pos, last, heap_cnt = heap->heap_cnt;
 540         struct auxtrace_heap_item *heap_array;
 541
 542         if (!heap_cnt)
 543                 return;
 544
 545         heap->heap_cnt -= 1;
 546
 547         heap_array = heap->heap_array;
 548
 549         pos = 0;
 550         while (1) {
 551                 unsigned int left, right;
 552
 553                 left = (pos << 1) + 1;
 554                 if (left >= heap_cnt)
 555                         break;
 556                 right = left + 1;
 557                 if (right >= heap_cnt) {
 558                         heap_array[pos] = heap_array[left];
 559                         return;
 560                 }
 561                 if (heap_array[left].ordinal < heap_array[right].ordinal) {
 562                         heap_array[pos] = heap_array[left];
 563                         pos = left;
 564                 } else {
 565                         heap_array[pos] = heap_array[right];
 566                         pos = right;
 567                 }
 568         }
 569
 570         last = heap_cnt - 1;
 571         auxtrace_heapify(heap_array, pos, heap_array[last].queue_nr,
 572                          heap_array[last].ordinal);
 573 }
 574
 575 size_t auxtrace_record__info_priv_size(struct auxtrace_record *itr,
 576                                        struct evlist *evlist)
 577 {
 578         if (itr)
 579                 return itr->info_priv_size(itr, evlist);
 580         return 0;
 581 }
 582
 583 static int auxtrace_not_supported(void)
 584 {
 585         pr_err("AUX area tracing is not supported on this architecture\n");
 586         return -EINVAL;
 587 }
 588
 589 int auxtrace_record__info_fill(struct auxtrace_record *itr,
 590                                struct perf_session *session,
 591                                struct perf_record_auxtrace_info *auxtrace_info,
 592                                size_t priv_size)
 593 {
 594         if (itr)
 595                 return itr->info_fill(itr, session, auxtrace_info, priv_size);
 596         return auxtrace_not_supported();
 597 }
 598
 599 void auxtrace_record__free(struct auxtrace_record *itr)
 600 {
 601         if (itr)
 602                 itr->free(itr);
 603 }
 604
 605 int auxtrace_record__snapshot_start(struct auxtrace_record *itr)
 606 {
 607         if (itr && itr->snapshot_start)
 608                 return itr->snapshot_start(itr);
 609         return 0;
 610 }
 611
 612 int auxtrace_record__snapshot_finish(struct auxtrace_record *itr, bool on_exit)
 613 {
 614         if (!on_exit && itr && itr->snapshot_finish)
 615                 return itr->snapshot_finish(itr);
 616         return 0;
 617 }
 618
 619 int auxtrace_record__find_snapshot(struct auxtrace_record *itr, int idx,
 620                                    struct auxtrace_mmap *mm,
 621                                    unsigned char *data, u64 *head, u64 *old)
 622 {
 623         if (itr && itr->find_snapshot)
 624                 return itr->find_snapshot(itr, idx, mm, data, head, old);
 625         return 0;
 626 }
 627
 628 int auxtrace_record__options(struct auxtrace_record *itr,
 629                              struct evlist *evlist,
 630                              struct record_opts *opts)
 631 {
 632         if (itr)
 633                 return itr->recording_options(itr, evlist, opts);
 634         return 0;
 635 }
 636
 637 u64 auxtrace_record__reference(struct auxtrace_record *itr)
 638 {
 639         if (itr)
 640                 return itr->reference(itr);
 641         return 0;
 642 }
 643
 644 int auxtrace_parse_snapshot_options(struct auxtrace_record *itr,
 645                                     struct record_opts *opts, const char *str)
 646 {
 647         if (!str)
 648                 return 0;
 649
 650         /* PMU-agnostic options */
 651         switch (*str) {
 652         case 'e':
 653                 opts->auxtrace_snapshot_on_exit = true;
 654                 str++;
 655                 break;
 656         default:
 657                 break;
 658         }
 659
 660         if (itr)
 661                 return itr->parse_snapshot_options(itr, opts, str);
 662
 663         pr_err("No AUX area tracing to snapshot\n");
 664         return -EINVAL;
 665 }
 666
 667 /*
 668  * Event record size is 16-bit which results in a maximum size of about 64KiB.
 669  * Allow about 4KiB for the rest of the sample record, to give a maximum
 670  * AUX area sample size of 60KiB.
 671  */
 672 #define MAX_AUX_SAMPLE_SIZE (60 * 1024)
 673
 674 /* Arbitrary default size if no other default provided */
 675 #define DEFAULT_AUX_SAMPLE_SIZE (4 * 1024)
 676
 677 static int auxtrace_validate_aux_sample_size(struct evlist *evlist,
 678                                              struct record_opts *opts)
 679 {
 680         struct evsel *evsel;
 681         bool has_aux_leader = false;
 682         u32 sz;
 683
 684         evlist__for_each_entry(evlist, evsel) {
 685                 sz = evsel->core.attr.aux_sample_size;
 686                 if (perf_evsel__is_group_leader(evsel)) {
 687                         has_aux_leader = perf_evsel__is_aux_event(evsel);
 688                         if (sz) {
 689                                 if (has_aux_leader)
 690                                         pr_err("Cannot add AUX area sampling to an AUX area event\n");
 691                                 else
 692                                         pr_err("Cannot add AUX area sampling to a group leader\n");
 693                                 return -EINVAL;
 694                         }
 695                 }
 696                 if (sz > MAX_AUX_SAMPLE_SIZE) {
 697                         pr_err("AUX area sample size %u too big, max. %d\n",
 698                                sz, MAX_AUX_SAMPLE_SIZE);
 699                         return -EINVAL;
 700                 }
 701                 if (sz) {
 702                         if (!has_aux_leader) {
 703                                 pr_err("Cannot add AUX area sampling because group leader is not an AUX area event\n");
 704                                 return -EINVAL;
 705                         }
 706                         perf_evsel__set_sample_bit(evsel, AUX);
 707                         opts->auxtrace_sample_mode = true;
 708                 } else {
 709                         perf_evsel__reset_sample_bit(evsel, AUX);
 710                 }
 711         }
 712
 713         if (!opts->auxtrace_sample_mode) {
 714                 pr_err("AUX area sampling requires an AUX area event group leader plus other events to which to add samples\n");
 715                 return -EINVAL;
 716         }
 717
 718         if (!perf_can_aux_sample()) {
 719                 pr_err("AUX area sampling is not supported by kernel\n");
 720                 return -EINVAL;
 721         }
 722
 723         return 0;
 724 }
 725
 726 int auxtrace_parse_sample_options(struct auxtrace_record *itr,
 727                                   struct evlist *evlist,
 728                                   struct record_opts *opts, const char *str)
 729 {
 730         struct perf_evsel_config_term *term;
 731         struct evsel *aux_evsel;
 732         bool has_aux_sample_size = false;
 733         bool has_aux_leader = false;
 734         struct evsel *evsel;
 735         char *endptr;
 736         unsigned long sz;
 737
 738         if (!str)
 739                 goto no_opt;
 740
 741         if (!itr) {
 742                 pr_err("No AUX area event to sample\n");
 743                 return -EINVAL;
 744         }
 745
 746         sz = strtoul(str, &endptr, 0);
 747         if (*endptr || sz > UINT_MAX) {
 748                 pr_err("Bad AUX area sampling option: '%s'\n", str);
 749                 return -EINVAL;
 750         }
 751
 752         if (!sz)
 753                 sz = itr->default_aux_sample_size;
 754
 755         if (!sz)
 756                 sz = DEFAULT_AUX_SAMPLE_SIZE;
 757
 758         /* Set aux_sample_size based on --aux-sample option */
 759         evlist__for_each_entry(evlist, evsel) {
 760                 if (perf_evsel__is_group_leader(evsel)) {
 761                         has_aux_leader = perf_evsel__is_aux_event(evsel);
 762                 } else if (has_aux_leader) {
 763                         evsel->core.attr.aux_sample_size = sz;
 764                 }
 765         }
 766 no_opt:
 767         aux_evsel = NULL;
 768         /* Override with aux_sample_size from config term */
 769         evlist__for_each_entry(evlist, evsel) {
 770                 if (perf_evsel__is_aux_event(evsel))
 771                         aux_evsel = evsel;
 772                 term = perf_evsel__get_config_term(evsel, AUX_SAMPLE_SIZE);
 773                 if (term) {
 774                         has_aux_sample_size = true;
 775                         evsel->core.attr.aux_sample_size = term->val.aux_sample_size;
 776                         /* If possible, group with the AUX event */
 777                         if (aux_evsel && evsel->core.attr.aux_sample_size)
 778                                 perf_evlist__regroup(evlist, aux_evsel, evsel);
 779                 }
 780         }
 781
 782         if (!str && !has_aux_sample_size)
 783                 return 0;
 784
 785         if (!itr) {
 786                 pr_err("No AUX area event to sample\n");
 787                 return -EINVAL;
 788         }
 789
 790         return auxtrace_validate_aux_sample_size(evlist, opts);
 791 }
 792
 793 struct auxtrace_record *__weak
 794 auxtrace_record__init(struct evlist *evlist __maybe_unused, int *err)
 795 {
 796         *err = 0;
 797         return NULL;
 798 }
 799
 800 static int auxtrace_index__alloc(struct list_head *head)
 801 {
 802         struct auxtrace_index *auxtrace_index;
 803
 804         auxtrace_index = malloc(sizeof(struct auxtrace_index));
 805         if (!auxtrace_index)
 806                 return -ENOMEM;
 807
 808         auxtrace_index->nr = 0;
 809         INIT_LIST_HEAD(&auxtrace_index->list);
 810
 811         list_add_tail(&auxtrace_index->list, head);
 812
 813         return 0;
 814 }
 815
 816 void auxtrace_index__free(struct list_head *head)
 817 {
 818         struct auxtrace_index *auxtrace_index, *n;
 819
 820         list_for_each_entry_safe(auxtrace_index, n, head, list) {
 821                 list_del_init(&auxtrace_index->list);
 822                 free(auxtrace_index);
 823         }
 824 }
 825
 826 static struct auxtrace_index *auxtrace_index__last(struct list_head *head)
 827 {
 828         struct auxtrace_index *auxtrace_index;
 829         int err;
 830
 831         if (list_empty(head)) {
 832                 err = auxtrace_index__alloc(head);
 833                 if (err)
 834                         return NULL;
 835         }
 836
 837         auxtrace_index = list_entry(head->prev, struct auxtrace_index, list);
 838
 839         if (auxtrace_index->nr >= PERF_AUXTRACE_INDEX_ENTRY_COUNT) {
 840                 err = auxtrace_index__alloc(head);
 841                 if (err)
 842                         return NULL;
 843                 auxtrace_index = list_entry(head->prev, struct auxtrace_index,
 844                                             list);
 845         }
 846
 847         return auxtrace_index;
 848 }
 849
 850 int auxtrace_index__auxtrace_event(struct list_head *head,
 851                                    union perf_event *event, off_t file_offset)
 852 {
 853         struct auxtrace_index *auxtrace_index;
 854         size_t nr;
 855
 856         auxtrace_index = auxtrace_index__last(head);
 857         if (!auxtrace_index)
 858                 return -ENOMEM;
 859
 860         nr = auxtrace_index->nr;
 861         auxtrace_index->entries[nr].file_offset = file_offset;
 862         auxtrace_index->entries[nr].sz = event->header.size;
 863         auxtrace_index->nr += 1;
 864
 865         return 0;
 866 }
 867
 868 static int auxtrace_index__do_write(int fd,
 869                                     struct auxtrace_index *auxtrace_index)
 870 {
 871         struct auxtrace_index_entry ent;
 872         size_t i;
 873
 874         for (i = 0; i < auxtrace_index->nr; i++) {
 875                 ent.file_offset = auxtrace_index->entries[i].file_offset;
 876                 ent.sz = auxtrace_index->entries[i].sz;
 877                 if (writen(fd, &ent, sizeof(ent)) != sizeof(ent))
 878                         return -errno;
 879         }
 880         return 0;
 881 }
 882
 883 int auxtrace_index__write(int fd, struct list_head *head)
 884 {
 885         struct auxtrace_index *auxtrace_index;
 886         u64 total = 0;
 887         int err;
 888
 889         list_for_each_entry(auxtrace_index, head, list)
 890                 total += auxtrace_index->nr;
 891
 892         if (writen(fd, &total, sizeof(total)) != sizeof(total))
 893                 return -errno;
 894
 895         list_for_each_entry(auxtrace_index, head, list) {
 896                 err = auxtrace_index__do_write(fd, auxtrace_index);
 897                 if (err)
 898                         return err;
 899         }
 900
 901         return 0;
 902 }
 903
 904 static int auxtrace_index__process_entry(int fd, struct list_head *head,
 905                                          bool needs_swap)
 906 {
 907         struct auxtrace_index *auxtrace_index;
 908         struct auxtrace_index_entry ent;
 909         size_t nr;
 910
 911         if (readn(fd, &ent, sizeof(ent)) != sizeof(ent))
 912                 return -1;
 913
 914         auxtrace_index = auxtrace_index__last(head);
 915         if (!auxtrace_index)
 916                 return -1;
 917
 918         nr = auxtrace_index->nr;
 919         if (needs_swap) {
 920                 auxtrace_index->entries[nr].file_offset =
 921                                                 bswap_64(ent.file_offset);
 922                 auxtrace_index->entries[nr].sz = bswap_64(ent.sz);
 923         } else {
 924                 auxtrace_index->entries[nr].file_offset = ent.file_offset;
 925                 auxtrace_index->entries[nr].sz = ent.sz;
 926         }
 927
 928         auxtrace_index->nr = nr + 1;
 929
 930         return 0;
 931 }
 932
 933 int auxtrace_index__process(int fd, u64 size, struct perf_session *session,
 934                             bool needs_swap)
 935 {
 936         struct list_head *head = &session->auxtrace_index;
 937         u64 nr;
 938
 939         if (readn(fd, &nr, sizeof(u64)) != sizeof(u64))
 940                 return -1;
 941
 942         if (needs_swap)
 943                 nr = bswap_64(nr);
 944
 945         if (sizeof(u64) + nr * sizeof(struct auxtrace_index_entry) > size)
 946                 return -1;
 947
 948         while (nr--) {
 949                 int err;
 950
 951                 err = auxtrace_index__process_entry(fd, head, needs_swap);
 952                 if (err)
 953                         return -1;
 954         }
 955
 956         return 0;
 957 }
 958
 959 static int auxtrace_queues__process_index_entry(struct auxtrace_queues *queues,
 960                                                 struct perf_session *session,
 961                                                 struct auxtrace_index_entry *ent)
 962 {
 963         return auxtrace_queues__add_indexed_event(queues, session,
 964                                                   ent->file_offset, ent->sz);
 965 }
 966
 967 int auxtrace_queues__process_index(struct auxtrace_queues *queues,
 968                                    struct perf_session *session)
 969 {
 970         struct auxtrace_index *auxtrace_index;
 971         struct auxtrace_index_entry *ent;
 972         size_t i;
 973         int err;
 974
 975         if (auxtrace__dont_decode(session))
 976                 return 0;
 977
 978         list_for_each_entry(auxtrace_index, &session->auxtrace_index, list) {
 979                 for (i = 0; i < auxtrace_index->nr; i++) {
 980                         ent = &auxtrace_index->entries[i];
 981                         err = auxtrace_queues__process_index_entry(queues,
 982                                                                    session,
 983                                                                    ent);
 984                         if (err)
 985                                 return err;
 986                 }
 987         }
 988         return 0;
 989 }
 990
 991 struct auxtrace_buffer *auxtrace_buffer__next(struct auxtrace_queue *queue,
 992                                               struct auxtrace_buffer *buffer)
 993 {
 994         if (buffer) {
 995                 if (list_is_last(&buffer->list, &queue->head))
 996                         return NULL;
 997                 return list_entry(buffer->list.next, struct auxtrace_buffer,
 998                                   list);
 999         } else {
1000                 if (list_empty(&queue->head))
1001                         return NULL;
1002                 return list_entry(queue->head.next, struct auxtrace_buffer,
1003                                   list);
1004         }
1005 }
1006
1007 struct auxtrace_queue *auxtrace_queues__sample_queue(struct auxtrace_queues *queues,
1008                                                      struct perf_sample *sample,
1009                                                      struct perf_session *session)
1010 {
1011         struct perf_sample_id *sid;
1012         unsigned int idx;
1013         u64 id;
1014
1015         id = sample->id;
1016         if (!id)
1017                 return NULL;
1018
1019         sid = perf_evlist__id2sid(session->evlist, id);
1020         if (!sid)
1021                 return NULL;
1022
1023         idx = sid->idx;
1024
1025         if (idx >= queues->nr_queues)
1026                 return NULL;
1027
1028         return &queues->queue_array[idx];
1029 }
1030
1031 int auxtrace_queues__add_sample(struct auxtrace_queues *queues,
1032                                 struct perf_session *session,
1033                                 struct perf_sample *sample, u64 data_offset,
1034                                 u64 reference)
1035 {
1036         struct auxtrace_buffer buffer = {
1037                 .pid = -1,
1038                 .data_offset = data_offset,
1039                 .reference = reference,
1040                 .size = sample->aux_sample.size,
1041         };
1042         struct perf_sample_id *sid;
1043         u64 id = sample->id;
1044         unsigned int idx;
1045
1046         if (!id)
1047                 return -EINVAL;
1048
1049         sid = perf_evlist__id2sid(session->evlist, id);
1050         if (!sid)
1051                 return -ENOENT;
1052
1053         idx = sid->idx;
1054         buffer.tid = sid->tid;
1055         buffer.cpu = sid->cpu;
1056
1057         return auxtrace_queues__add_buffer(queues, session, idx, &buffer, NULL);
1058 }
1059
1060 struct queue_data {
1061         bool samples;
1062         bool events;
1063 };
1064
1065 static int auxtrace_queue_data_cb(struct perf_session *session,
1066                                   union perf_event *event, u64 offset,
1067                                   void *data)
1068 {
1069         struct queue_data *qd = data;
1070         struct perf_sample sample;
1071         int err;
1072
1073         if (qd->events && event->header.type == PERF_RECORD_AUXTRACE) {
1074                 if (event->header.size < sizeof(struct perf_record_auxtrace))
1075                         return -EINVAL;
1076                 offset += event->header.size;
1077                 return session->auxtrace->queue_data(session, NULL, event,
1078                                                      offset);
1079         }
1080
1081         if (!qd->samples || event->header.type != PERF_RECORD_SAMPLE)
1082                 return 0;
1083
1084         err = perf_evlist__parse_sample(session->evlist, event, &sample);
1085         if (err)
1086                 return err;
1087
1088         if (!sample.aux_sample.size)
1089                 return 0;
1090
1091         offset += sample.aux_sample.data - (void *)event;
1092
1093         return session->auxtrace->queue_data(session, &sample, NULL, offset);
1094 }
1095
1096 int auxtrace_queue_data(struct perf_session *session, bool samples, bool events)
1097 {
1098         struct queue_data qd = {
1099                 .samples = samples,
1100                 .events = events,
1101         };
1102
1103         if (auxtrace__dont_decode(session))
1104                 return 0;
1105
1106         if (!session->auxtrace || !session->auxtrace->queue_data)
1107                 return -EINVAL;
1108
1109         return perf_session__peek_events(session, session->header.data_offset,
1110                                          session->header.data_size,
1111                                          auxtrace_queue_data_cb, &qd);
1112 }
1113
1114 void *auxtrace_buffer__get_data(struct auxtrace_buffer *buffer, int fd)
1115 {
1116         size_t adj = buffer->data_offset & (page_size - 1);
1117         size_t size = buffer->size + adj;
1118         off_t file_offset = buffer->data_offset - adj;
1119         void *addr;
1120
1121         if (buffer->data)
1122                 return buffer->data;
1123
1124         addr = mmap(NULL, size, PROT_READ, MAP_SHARED, fd, file_offset);
1125         if (addr == MAP_FAILED)
1126                 return NULL;
1127
1128         buffer->mmap_addr = addr;
1129         buffer->mmap_size = size;
1130
1131         buffer->data = addr + adj;
1132
1133         return buffer->data;
1134 }
1135
1136 void auxtrace_buffer__put_data(struct auxtrace_buffer *buffer)
1137 {
1138         if (!buffer->data || !buffer->mmap_addr)
1139                 return;
1140         munmap(buffer->mmap_addr, buffer->mmap_size);
1141         buffer->mmap_addr = NULL;
1142         buffer->mmap_size = 0;
1143         buffer->data = NULL;
1144         buffer->use_data = NULL;
1145 }
1146
1147 void auxtrace_buffer__drop_data(struct auxtrace_buffer *buffer)
1148 {
1149         auxtrace_buffer__put_data(buffer);
1150         if (buffer->data_needs_freeing) {
1151                 buffer->data_needs_freeing = false;
1152                 zfree(&buffer->data);
1153                 buffer->use_data = NULL;
1154                 buffer->size = 0;
1155         }
1156 }
1157
1158 void auxtrace_buffer__free(struct auxtrace_buffer *buffer)
1159 {
1160         auxtrace_buffer__drop_data(buffer);
1161         free(buffer);
1162 }
1163
1164 void auxtrace_synth_error(struct perf_record_auxtrace_error *auxtrace_error, int type,
1165                           int code, int cpu, pid_t pid, pid_t tid, u64 ip,
1166                           const char *msg, u64 timestamp)
1167 {
1168         size_t size;
1169
1170         memset(auxtrace_error, 0, sizeof(struct perf_record_auxtrace_error));
1171
1172         auxtrace_error->header.type = PERF_RECORD_AUXTRACE_ERROR;
1173         auxtrace_error->type = type;
1174         auxtrace_error->code = code;
1175         auxtrace_error->cpu = cpu;
1176         auxtrace_error->pid = pid;
1177         auxtrace_error->tid = tid;
1178         auxtrace_error->fmt = 1;
1179         auxtrace_error->ip = ip;
1180         auxtrace_error->time = timestamp;
1181         strlcpy(auxtrace_error->msg, msg, MAX_AUXTRACE_ERROR_MSG);
1182
1183         size = (void *)auxtrace_error->msg - (void *)auxtrace_error +
1184                strlen(auxtrace_error->msg) + 1;
1185         auxtrace_error->header.size = PERF_ALIGN(size, sizeof(u64));
1186 }
1187
1188 int perf_event__synthesize_auxtrace_info(struct auxtrace_record *itr,
1189                                          struct perf_tool *tool,
1190                                          struct perf_session *session,
1191                                          perf_event__handler_t process)
1192 {
1193         union perf_event *ev;
1194         size_t priv_size;
1195         int err;
1196
1197         pr_debug2("Synthesizing auxtrace information\n");
1198         priv_size = auxtrace_record__info_priv_size(itr, session->evlist);
1199         ev = zalloc(sizeof(struct perf_record_auxtrace_info) + priv_size);
1200         if (!ev)
1201                 return -ENOMEM;
1202
1203         ev->auxtrace_info.header.type = PERF_RECORD_AUXTRACE_INFO;
1204         ev->auxtrace_info.header.size = sizeof(struct perf_record_auxtrace_info) +
1205                                         priv_size;
1206         err = auxtrace_record__info_fill(itr, session, &ev->auxtrace_info,
1207                                          priv_size);
1208         if (err)
1209                 goto out_free;
1210
1211         err = process(tool, ev, NULL, NULL);
1212 out_free:
1213         free(ev);
1214         return err;
1215 }
1216
1217 int perf_event__process_auxtrace_info(struct perf_session *session,
1218                                       union perf_event *event)
1219 {
1220         enum auxtrace_type type = event->auxtrace_info.type;
1221
1222         if (dump_trace)
1223                 fprintf(stdout, " type: %u\n", type);
1224
1225         switch (type) {
1226         case PERF_AUXTRACE_INTEL_PT:
1227                 return intel_pt_process_auxtrace_info(event, session);
1228         case PERF_AUXTRACE_INTEL_BTS:
1229                 return intel_bts_process_auxtrace_info(event, session);
1230         case PERF_AUXTRACE_ARM_SPE:
1231                 return arm_spe_process_auxtrace_info(event, session);
1232         case PERF_AUXTRACE_CS_ETM:
1233                 return cs_etm__process_auxtrace_info(event, session);
1234         case PERF_AUXTRACE_S390_CPUMSF:
1235                 return s390_cpumsf_process_auxtrace_info(event, session);
1236         case PERF_AUXTRACE_UNKNOWN:
1237         default:
1238                 return -EINVAL;
1239         }
1240 }
1241
1242 s64 perf_event__process_auxtrace(struct perf_session *session,
1243                                  union perf_event *event)
1244 {
1245         s64 err;
1246
1247         if (dump_trace)
1248                 fprintf(stdout, " size: %#"PRI_lx64"  offset: %#"PRI_lx64"  ref: %#"PRI_lx64"  idx: %u  tid: %d  cpu: %d\n",
1249                         event->auxtrace.size, event->auxtrace.offset,
1250                         event->auxtrace.reference, event->auxtrace.idx,
1251                         event->auxtrace.tid, event->auxtrace.cpu);
1252
1253         if (auxtrace__dont_decode(session))
1254                 return event->auxtrace.size;
1255
1256         if (!session->auxtrace || event->header.type != PERF_RECORD_AUXTRACE)
1257                 return -EINVAL;
1258
1259         err = session->auxtrace->process_auxtrace_event(session, event, session->tool);
1260         if (err < 0)
1261                 return err;
1262
1263         return event->auxtrace.size;
1264 }
1265
1266 #define PERF_ITRACE_DEFAULT_PERIOD_TYPE         PERF_ITRACE_PERIOD_NANOSECS
1267 #define PERF_ITRACE_DEFAULT_PERIOD              100000
1268 #define PERF_ITRACE_DEFAULT_CALLCHAIN_SZ        16
1269 #define PERF_ITRACE_MAX_CALLCHAIN_SZ            1024
1270 #define PERF_ITRACE_DEFAULT_LAST_BRANCH_SZ      64
1271 #define PERF_ITRACE_MAX_LAST_BRANCH_SZ          1024
1272
1273 void itrace_synth_opts__set_default(struct itrace_synth_opts *synth_opts,
1274                                     bool no_sample)
1275 {
1276         synth_opts->branches = true;
1277         synth_opts->transactions = true;
1278         synth_opts->ptwrites = true;
1279         synth_opts->pwr_events = true;
1280         synth_opts->other_events = true;
1281         synth_opts->errors = true;
1282         if (no_sample) {
1283                 synth_opts->period_type = PERF_ITRACE_PERIOD_INSTRUCTIONS;
1284                 synth_opts->period = 1;
1285                 synth_opts->calls = true;
1286         } else {
1287                 synth_opts->instructions = true;
1288                 synth_opts->period_type = PERF_ITRACE_DEFAULT_PERIOD_TYPE;
1289                 synth_opts->period = PERF_ITRACE_DEFAULT_PERIOD;
1290         }
1291         synth_opts->callchain_sz = PERF_ITRACE_DEFAULT_CALLCHAIN_SZ;
1292         synth_opts->last_branch_sz = PERF_ITRACE_DEFAULT_LAST_BRANCH_SZ;
1293         synth_opts->initial_skip = 0;
1294 }
1295
1296 /*
1297  * Please check tools/perf/Documentation/perf-script.txt for information
1298  * about the options parsed here, which is introduced after this cset,
1299  * when support in 'perf script' for these options is introduced.
1300  */
1301 int itrace_parse_synth_opts(const struct option *opt, const char *str,
1302                             int unset)
1303 {
1304         struct itrace_synth_opts *synth_opts = opt->value;
1305         const char *p;
1306         char *endptr;
1307         bool period_type_set = false;
1308         bool period_set = false;
1309
1310         synth_opts->set = true;
1311
1312         if (unset) {
1313                 synth_opts->dont_decode = true;
1314                 return 0;
1315         }
1316
1317         if (!str) {
1318                 itrace_synth_opts__set_default(synth_opts,
1319                                                synth_opts->default_no_sample);
1320                 return 0;
1321         }
1322
1323         for (p = str; *p;) {
1324                 switch (*p++) {
1325                 case 'i':
1326                         synth_opts->instructions = true;
1327                         while (*p == ' ' || *p == ',')
1328                                 p += 1;
1329                         if (isdigit(*p)) {
1330                                 synth_opts->period = strtoull(p, &endptr, 10);
1331                                 period_set = true;
1332                                 p = endptr;
1333                                 while (*p == ' ' || *p == ',')
1334                                         p += 1;
1335                                 switch (*p++) {
1336                                 case 'i':
1337                                         synth_opts->period_type =
1338                                                 PERF_ITRACE_PERIOD_INSTRUCTIONS;
1339                                         period_type_set = true;
1340                                         break;
1341                                 case 't':
1342                                         synth_opts->period_type =
1343                                                 PERF_ITRACE_PERIOD_TICKS;
1344                                         period_type_set = true;
1345                                         break;
1346                                 case 'm':
1347                                         synth_opts->period *= 1000;
1348                                         /* Fall through */
1349                                 case 'u':
1350                                         synth_opts->period *= 1000;
1351                                         /* Fall through */
1352                                 case 'n':
1353                                         if (*p++ != 's')
1354                                                 goto out_err;
1355                                         synth_opts->period_type =
1356                                                 PERF_ITRACE_PERIOD_NANOSECS;
1357                                         period_type_set = true;
1358                                         break;
1359                                 case '\0':
1360                                         goto out;
1361                                 default:
1362                                         goto out_err;
1363                                 }
1364                         }
1365                         break;
1366                 case 'b':
1367                         synth_opts->branches = true;
1368                         break;
1369                 case 'x':
1370                         synth_opts->transactions = true;
1371                         break;
1372                 case 'w':
1373                         synth_opts->ptwrites = true;
1374                         break;
1375                 case 'p':
1376                         synth_opts->pwr_events = true;
1377                         break;
1378                 case 'o':
1379                         synth_opts->other_events = true;
1380                         break;
1381                 case 'e':
1382                         synth_opts->errors = true;
1383                         break;
1384                 case 'd':
1385                         synth_opts->log = true;
1386                         break;
1387                 case 'c':
1388                         synth_opts->branches = true;
1389                         synth_opts->calls = true;
1390                         break;
1391                 case 'r':
1392                         synth_opts->branches = true;
1393                         synth_opts->returns = true;
1394                         break;
1395                 case 'g':
1396                         synth_opts->callchain = true;
1397                         synth_opts->callchain_sz =
1398                                         PERF_ITRACE_DEFAULT_CALLCHAIN_SZ;
1399                         while (*p == ' ' || *p == ',')
1400                                 p += 1;
1401                         if (isdigit(*p)) {
1402                                 unsigned int val;
1403
1404                                 val = strtoul(p, &endptr, 10);
1405                                 p = endptr;
1406                                 if (!val || val > PERF_ITRACE_MAX_CALLCHAIN_SZ)
1407                                         goto out_err;
1408                                 synth_opts->callchain_sz = val;
1409                         }
1410                         break;
1411                 case 'l':
1412                         synth_opts->last_branch = true;
1413                         synth_opts->last_branch_sz =
1414                                         PERF_ITRACE_DEFAULT_LAST_BRANCH_SZ;
1415                         while (*p == ' ' || *p == ',')
1416                                 p += 1;
1417                         if (isdigit(*p)) {
1418                                 unsigned int val;
1419
1420                                 val = strtoul(p, &endptr, 10);
1421                                 p = endptr;
1422                                 if (!val ||
1423                                     val > PERF_ITRACE_MAX_LAST_BRANCH_SZ)
1424                                         goto out_err;
1425                                 synth_opts->last_branch_sz = val;
1426                         }
1427                         break;
1428                 case 's':
1429                         synth_opts->initial_skip = strtoul(p, &endptr, 10);
1430                         if (p == endptr)
1431                                 goto out_err;
1432                         p = endptr;
1433                         break;
1434                 case ' ':
1435                 case ',':
1436                         break;
1437                 default:
1438                         goto out_err;
1439                 }
1440         }
1441 out:
1442         if (synth_opts->instructions) {
1443                 if (!period_type_set)
1444                         synth_opts->period_type =
1445                                         PERF_ITRACE_DEFAULT_PERIOD_TYPE;
1446                 if (!period_set)
1447                         synth_opts->period = PERF_ITRACE_DEFAULT_PERIOD;
1448         }
1449
1450         return 0;
1451
1452 out_err:
1453         pr_err("Bad Instruction Tracing options '%s'\n", str);
1454         return -EINVAL;
1455 }
1456
1457 static const char * const auxtrace_error_type_name[] = {
1458         [PERF_AUXTRACE_ERROR_ITRACE] = "instruction trace",
1459 };
1460
1461 static const char *auxtrace_error_name(int type)
1462 {
1463         const char *error_type_name = NULL;
1464
1465         if (type < PERF_AUXTRACE_ERROR_MAX)
1466                 error_type_name = auxtrace_error_type_name[type];
1467         if (!error_type_name)
1468                 error_type_name = "unknown AUX";
1469         return error_type_name;
1470 }
1471
1472 size_t perf_event__fprintf_auxtrace_error(union perf_event *event, FILE *fp)
1473 {
1474         struct perf_record_auxtrace_error *e = &event->auxtrace_error;
1475         unsigned long long nsecs = e->time;
1476         const char *msg = e->msg;
1477         int ret;
1478
1479         ret = fprintf(fp, " %s error type %u",
1480                       auxtrace_error_name(e->type), e->type);
1481
1482         if (e->fmt && nsecs) {
1483                 unsigned long secs = nsecs / NSEC_PER_SEC;
1484
1485                 nsecs -= secs * NSEC_PER_SEC;
1486                 ret += fprintf(fp, " time %lu.%09llu", secs, nsecs);
1487         } else {
1488                 ret += fprintf(fp, " time 0");
1489         }
1490
1491         if (!e->fmt)
1492                 msg = (const char *)&e->time;
1493
1494         ret += fprintf(fp, " cpu %d pid %d tid %d ip %#"PRI_lx64" code %u: %s\n",
1495                        e->cpu, e->pid, e->tid, e->ip, e->code, msg);
1496         return ret;
1497 }
1498
1499 void perf_session__auxtrace_error_inc(struct perf_session *session,
1500                                       union perf_event *event)
1501 {
1502         struct perf_record_auxtrace_error *e = &event->auxtrace_error;
1503
1504         if (e->type < PERF_AUXTRACE_ERROR_MAX)
1505                 session->evlist->stats.nr_auxtrace_errors[e->type] += 1;
1506 }
1507
1508 void events_stats__auxtrace_error_warn(const struct events_stats *stats)
1509 {
1510         int i;
1511
1512         for (i = 0; i < PERF_AUXTRACE_ERROR_MAX; i++) {
1513                 if (!stats->nr_auxtrace_errors[i])
1514                         continue;
1515                 ui__warning("%u %s errors\n",
1516                             stats->nr_auxtrace_errors[i],
1517                             auxtrace_error_name(i));
1518         }
1519 }
1520
1521 int perf_event__process_auxtrace_error(struct perf_session *session,
1522                                        union perf_event *event)
1523 {
1524         if (auxtrace__dont_decode(session))
1525                 return 0;
1526
1527         perf_event__fprintf_auxtrace_error(event, stdout);
1528         return 0;
1529 }
1530
1531 static int __auxtrace_mmap__read(struct mmap *map,
1532                                  struct auxtrace_record *itr,
1533                                  struct perf_tool *tool, process_auxtrace_t fn,
1534                                  bool snapshot, size_t snapshot_size)
1535 {
1536         struct auxtrace_mmap *mm = &map->auxtrace_mmap;
1537         u64 head, old = mm->prev, offset, ref;
1538         unsigned char *data = mm->base;
1539         size_t size, head_off, old_off, len1, len2, padding;
1540         union perf_event ev;
1541         void *data1, *data2;
1542
1543         if (snapshot) {
1544                 head = auxtrace_mmap__read_snapshot_head(mm);
1545                 if (auxtrace_record__find_snapshot(itr, mm->idx, mm, data,
1546                                                    &head, &old))
1547                         return -1;
1548         } else {
1549                 head = auxtrace_mmap__read_head(mm);
1550         }
1551
1552         if (old == head)
1553                 return 0;
1554
1555         pr_debug3("auxtrace idx %d old %#"PRIx64" head %#"PRIx64" diff %#"PRIx64"\n",
1556                   mm->idx, old, head, head - old);
1557
1558         if (mm->mask) {
1559                 head_off = head & mm->mask;
1560                 old_off = old & mm->mask;
1561         } else {
1562                 head_off = head % mm->len;
1563                 old_off = old % mm->len;
1564         }
1565
1566         if (head_off > old_off)
1567                 size = head_off - old_off;
1568         else
1569                 size = mm->len - (old_off - head_off);
1570
1571         if (snapshot && size > snapshot_size)
1572                 size = snapshot_size;
1573
1574         ref = auxtrace_record__reference(itr);
1575
1576         if (head > old || size <= head || mm->mask) {
1577                 offset = head - size;
1578         } else {
1579                 /*
1580                  * When the buffer size is not a power of 2, 'head' wraps at the
1581                  * highest multiple of the buffer size, so we have to subtract
1582                  * the remainder here.
1583                  */
1584                 u64 rem = (0ULL - mm->len) % mm->len;
1585
1586                 offset = head - size - rem;
1587         }
1588
1589         if (size > head_off) {
1590                 len1 = size - head_off;
1591                 data1 = &data[mm->len - len1];
1592                 len2 = head_off;
1593                 data2 = &data[0];
1594         } else {
1595                 len1 = size;
1596                 data1 = &data[head_off - len1];
1597                 len2 = 0;
1598                 data2 = NULL;
1599         }
1600
1601         if (itr->alignment) {
1602                 unsigned int unwanted = len1 % itr->alignment;
1603
1604                 len1 -= unwanted;
1605                 size -= unwanted;
1606         }
1607
1608         /* padding must be written by fn() e.g. record__process_auxtrace() */
1609         padding = size & (PERF_AUXTRACE_RECORD_ALIGNMENT - 1);
1610         if (padding)
1611                 padding = PERF_AUXTRACE_RECORD_ALIGNMENT - padding;
1612
1613         memset(&ev, 0, sizeof(ev));
1614         ev.auxtrace.header.type = PERF_RECORD_AUXTRACE;
1615         ev.auxtrace.header.size = sizeof(ev.auxtrace);
1616         ev.auxtrace.size = size + padding;
1617         ev.auxtrace.offset = offset;
1618         ev.auxtrace.reference = ref;
1619         ev.auxtrace.idx = mm->idx;
1620         ev.auxtrace.tid = mm->tid;
1621         ev.auxtrace.cpu = mm->cpu;
1622
1623         if (fn(tool, map, &ev, data1, len1, data2, len2))
1624                 return -1;
1625
1626         mm->prev = head;
1627
1628         if (!snapshot) {
1629                 auxtrace_mmap__write_tail(mm, head);
1630                 if (itr->read_finish) {
1631                         int err;
1632
1633                         err = itr->read_finish(itr, mm->idx);
1634                         if (err < 0)
1635                                 return err;
1636                 }
1637         }
1638
1639         return 1;
1640 }
1641
1642 int auxtrace_mmap__read(struct mmap *map, struct auxtrace_record *itr,
1643                         struct perf_tool *tool, process_auxtrace_t fn)
1644 {
1645         return __auxtrace_mmap__read(map, itr, tool, fn, false, 0);
1646 }
1647
1648 int auxtrace_mmap__read_snapshot(struct mmap *map,
1649                                  struct auxtrace_record *itr,
1650                                  struct perf_tool *tool, process_auxtrace_t fn,
1651                                  size_t snapshot_size)
1652 {
1653         return __auxtrace_mmap__read(map, itr, tool, fn, true, snapshot_size);
1654 }
1655
1656 /**
1657  * struct auxtrace_cache - hash table to implement a cache
1658  * @hashtable: the hashtable
1659  * @sz: hashtable size (number of hlists)
1660  * @entry_size: size of an entry
1661  * @limit: limit the number of entries to this maximum, when reached the cache
1662  *         is dropped and caching begins again with an empty cache
1663  * @cnt: current number of entries
1664  * @bits: hashtable size (@sz = 2^@bits)
1665  */
1666 struct auxtrace_cache {
1667         struct hlist_head *hashtable;
1668         size_t sz;
1669         size_t entry_size;
1670         size_t limit;
1671         size_t cnt;
1672         unsigned int bits;
1673 };
1674
1675 struct auxtrace_cache *auxtrace_cache__new(unsigned int bits, size_t entry_size,
1676                                            unsigned int limit_percent)
1677 {
1678         struct auxtrace_cache *c;
1679         struct hlist_head *ht;
1680         size_t sz, i;
1681
1682         c = zalloc(sizeof(struct auxtrace_cache));
1683         if (!c)
1684                 return NULL;
1685
1686         sz = 1UL << bits;
1687
1688         ht = calloc(sz, sizeof(struct hlist_head));
1689         if (!ht)
1690                 goto out_free;
1691
1692         for (i = 0; i < sz; i++)
1693                 INIT_HLIST_HEAD(&ht[i]);
1694
1695         c->hashtable = ht;
1696         c->sz = sz;
1697         c->entry_size = entry_size;
1698         c->limit = (c->sz * limit_percent) / 100;
1699         c->bits = bits;
1700
1701         return c;
1702
1703 out_free:
1704         free(c);
1705         return NULL;
1706 }
1707
1708 static void auxtrace_cache__drop(struct auxtrace_cache *c)
1709 {
1710         struct auxtrace_cache_entry *entry;
1711         struct hlist_node *tmp;
1712         size_t i;
1713
1714         if (!c)
1715                 return;
1716
1717         for (i = 0; i < c->sz; i++) {
1718                 hlist_for_each_entry_safe(entry, tmp, &c->hashtable[i], hash) {
1719                         hlist_del(&entry->hash);
1720                         auxtrace_cache__free_entry(c, entry);
1721                 }
1722         }
1723
1724         c->cnt = 0;
1725 }
1726
1727 void auxtrace_cache__free(struct auxtrace_cache *c)
1728 {
1729         if (!c)
1730                 return;
1731
1732         auxtrace_cache__drop(c);
1733         zfree(&c->hashtable);
1734         free(c);
1735 }
1736
1737 void *auxtrace_cache__alloc_entry(struct auxtrace_cache *c)
1738 {
1739         return malloc(c->entry_size);
1740 }
1741
1742 void auxtrace_cache__free_entry(struct auxtrace_cache *c __maybe_unused,
1743                                 void *entry)
1744 {
1745         free(entry);
1746 }
1747
1748 int auxtrace_cache__add(struct auxtrace_cache *c, u32 key,
1749                         struct auxtrace_cache_entry *entry)
1750 {
1751         if (c->limit && ++c->cnt > c->limit)
1752                 auxtrace_cache__drop(c);
1753
1754         entry->key = key;
1755         hlist_add_head(&entry->hash, &c->hashtable[hash_32(key, c->bits)]);
1756
1757         return 0;
1758 }
1759
1760 static struct auxtrace_cache_entry *auxtrace_cache__rm(struct auxtrace_cache *c,
1761                                                        u32 key)
1762 {
1763         struct auxtrace_cache_entry *entry;
1764         struct hlist_head *hlist;
1765         struct hlist_node *n;
1766
1767         if (!c)
1768                 return NULL;
1769
1770         hlist = &c->hashtable[hash_32(key, c->bits)];
1771         hlist_for_each_entry_safe(entry, n, hlist, hash) {
1772                 if (entry->key == key) {
1773                         hlist_del(&entry->hash);
1774                         return entry;
1775                 }
1776         }
1777
1778         return NULL;
1779 }
1780
1781 void auxtrace_cache__remove(struct auxtrace_cache *c, u32 key)
1782 {
1783         struct auxtrace_cache_entry *entry = auxtrace_cache__rm(c, key);
1784
1785         auxtrace_cache__free_entry(c, entry);
1786 }
1787
1788 void *auxtrace_cache__lookup(struct auxtrace_cache *c, u32 key)
1789 {
1790         struct auxtrace_cache_entry *entry;
1791         struct hlist_head *hlist;
1792
1793         if (!c)
1794                 return NULL;
1795
1796         hlist = &c->hashtable[hash_32(key, c->bits)];
1797         hlist_for_each_entry(entry, hlist, hash) {
1798                 if (entry->key == key)
1799                         return entry;
1800         }
1801
1802         return NULL;
1803 }
1804
1805 static void addr_filter__free_str(struct addr_filter *filt)
1806 {
1807         zfree(&filt->str);
1808         filt->action   = NULL;
1809         filt->sym_from = NULL;
1810         filt->sym_to   = NULL;
1811         filt->filename = NULL;
1812 }
1813
1814 static struct addr_filter *addr_filter__new(void)
1815 {
1816         struct addr_filter *filt = zalloc(sizeof(*filt));
1817
1818         if (filt)
1819                 INIT_LIST_HEAD(&filt->list);
1820
1821         return filt;
1822 }
1823
1824 static void addr_filter__free(struct addr_filter *filt)
1825 {
1826         if (filt)
1827                 addr_filter__free_str(filt);
1828         free(filt);
1829 }
1830
1831 static void addr_filters__add(struct addr_filters *filts,
1832                               struct addr_filter *filt)
1833 {
1834         list_add_tail(&filt->list, &filts->head);
1835         filts->cnt += 1;
1836 }
1837
1838 static void addr_filters__del(struct addr_filters *filts,
1839                               struct addr_filter *filt)
1840 {
1841         list_del_init(&filt->list);
1842         filts->cnt -= 1;
1843 }
1844
1845 void addr_filters__init(struct addr_filters *filts)
1846 {
1847         INIT_LIST_HEAD(&filts->head);
1848         filts->cnt = 0;
1849 }
1850
1851 void addr_filters__exit(struct addr_filters *filts)
1852 {
1853         struct addr_filter *filt, *n;
1854
1855         list_for_each_entry_safe(filt, n, &filts->head, list) {
1856                 addr_filters__del(filts, filt);
1857                 addr_filter__free(filt);
1858         }
1859 }
1860
1861 static int parse_num_or_str(char **inp, u64 *num, const char **str,
1862                             const char *str_delim)
1863 {
1864         *inp += strspn(*inp, " ");
1865
1866         if (isdigit(**inp)) {
1867                 char *endptr;
1868
1869                 if (!num)
1870                         return -EINVAL;
1871                 errno = 0;
1872                 *num = strtoull(*inp, &endptr, 0);
1873                 if (errno)
1874                         return -errno;
1875                 if (endptr == *inp)
1876                         return -EINVAL;
1877                 *inp = endptr;
1878         } else {
1879                 size_t n;
1880
1881                 if (!str)
1882                         return -EINVAL;
1883                 *inp += strspn(*inp, " ");
1884                 *str = *inp;
1885                 n = strcspn(*inp, str_delim);
1886                 if (!n)
1887                         return -EINVAL;
1888                 *inp += n;
1889                 if (**inp) {
1890                         **inp = '\0';
1891                         *inp += 1;
1892                 }
1893         }
1894         return 0;
1895 }
1896
1897 static int parse_action(struct addr_filter *filt)
1898 {
1899         if (!strcmp(filt->action, "filter")) {
1900                 filt->start = true;
1901                 filt->range = true;
1902         } else if (!strcmp(filt->action, "start")) {
1903                 filt->start = true;
1904         } else if (!strcmp(filt->action, "stop")) {
1905                 filt->start = false;
1906         } else if (!strcmp(filt->action, "tracestop")) {
1907                 filt->start = false;
1908                 filt->range = true;
1909                 filt->action += 5; /* Change 'tracestop' to 'stop' */
1910         } else {
1911                 return -EINVAL;
1912         }
1913         return 0;
1914 }
1915
1916 static int parse_sym_idx(char **inp, int *idx)
1917 {
1918         *idx = -1;
1919
1920         *inp += strspn(*inp, " ");
1921
1922         if (**inp != '#')
1923                 return 0;
1924
1925         *inp += 1;
1926
1927         if (**inp == 'g' || **inp == 'G') {
1928                 *inp += 1;
1929                 *idx = 0;
1930         } else {
1931                 unsigned long num;
1932                 char *endptr;
1933
1934                 errno = 0;
1935                 num = strtoul(*inp, &endptr, 0);
1936                 if (errno)
1937                         return -errno;
1938                 if (endptr == *inp || num > INT_MAX)
1939                         return -EINVAL;
1940                 *inp = endptr;
1941                 *idx = num;
1942         }
1943
1944         return 0;
1945 }
1946
1947 static int parse_addr_size(char **inp, u64 *num, const char **str, int *idx)
1948 {
1949         int err = parse_num_or_str(inp, num, str, " ");
1950
1951         if (!err && *str)
1952                 err = parse_sym_idx(inp, idx);
1953
1954         return err;
1955 }
1956
1957 static int parse_one_filter(struct addr_filter *filt, const char **filter_inp)
1958 {
1959         char *fstr;
1960         int err;
1961
1962         filt->str = fstr = strdup(*filter_inp);
1963         if (!fstr)
1964                 return -ENOMEM;
1965
1966         err = parse_num_or_str(&fstr, NULL, &filt->action, " ");
1967         if (err)
1968                 goto out_err;
1969
1970         err = parse_action(filt);
1971         if (err)
1972                 goto out_err;
1973
1974         err = parse_addr_size(&fstr, &filt->addr, &filt->sym_from,
1975                               &filt->sym_from_idx);
1976         if (err)
1977                 goto out_err;
1978
1979         fstr += strspn(fstr, " ");
1980
1981         if (*fstr == '/') {
1982                 fstr += 1;
1983                 err = parse_addr_size(&fstr, &filt->size, &filt->sym_to,
1984                                       &filt->sym_to_idx);
1985                 if (err)
1986                         goto out_err;
1987                 filt->range = true;
1988         }
1989
1990         fstr += strspn(fstr, " ");
1991
1992         if (*fstr == '@') {
1993                 fstr += 1;
1994                 err = parse_num_or_str(&fstr, NULL, &filt->filename, " ,");
1995                 if (err)
1996                         goto out_err;
1997         }
1998
1999         fstr += strspn(fstr, " ,");
2000
2001         *filter_inp += fstr - filt->str;
2002
2003         return 0;
2004
2005 out_err:
2006         addr_filter__free_str(filt);
2007
2008         return err;
2009 }
2010
2011 int addr_filters__parse_bare_filter(struct addr_filters *filts,
2012                                     const char *filter)
2013 {
2014         struct addr_filter *filt;
2015         const char *fstr = filter;
2016         int err;
2017
2018         while (*fstr) {
2019                 filt = addr_filter__new();
2020                 err = parse_one_filter(filt, &fstr);
2021                 if (err) {
2022                         addr_filter__free(filt);
2023                         addr_filters__exit(filts);
2024                         return err;
2025                 }
2026                 addr_filters__add(filts, filt);
2027         }
2028
2029         return 0;
2030 }
2031
2032 struct sym_args {
2033         const char      *name;
2034         u64             start;
2035         u64             size;
2036         int             idx;
2037         int             cnt;
2038         bool            started;
2039         bool            global;
2040         bool            selected;
2041         bool            duplicate;
2042         bool            near;
2043 };
2044
2045 static bool kern_sym_match(struct sym_args *args, const char *name, char type)
2046 {
2047         /* A function with the same name, and global or the n'th found or any */
2048         return kallsyms__is_function(type) &&
2049                !strcmp(name, args->name) &&
2050                ((args->global && isupper(type)) ||
2051                 (args->selected && ++(args->cnt) == args->idx) ||
2052                 (!args->global && !args->selected));
2053 }
2054
2055 static int find_kern_sym_cb(void *arg, const char *name, char type, u64 start)
2056 {
2057         struct sym_args *args = arg;
2058
2059         if (args->started) {
2060                 if (!args->size)
2061                         args->size = start - args->start;
2062                 if (args->selected) {
2063                         if (args->size)
2064                                 return 1;
2065                 } else if (kern_sym_match(args, name, type)) {
2066                         args->duplicate = true;
2067                         return 1;
2068                 }
2069         } else if (kern_sym_match(args, name, type)) {
2070                 args->started = true;
2071                 args->start = start;
2072         }
2073
2074         return 0;
2075 }
2076
2077 static int print_kern_sym_cb(void *arg, const char *name, char type, u64 start)
2078 {
2079         struct sym_args *args = arg;
2080
2081         if (kern_sym_match(args, name, type)) {
2082                 pr_err("#%d\t0x%"PRIx64"\t%c\t%s\n",
2083                        ++args->cnt, start, type, name);
2084                 args->near = true;
2085         } else if (args->near) {
2086                 args->near = false;
2087                 pr_err("\t\twhich is near\t\t%s\n", name);
2088         }
2089
2090         return 0;
2091 }
2092
2093 static int sym_not_found_error(const char *sym_name, int idx)
2094 {
2095         if (idx > 0) {
2096                 pr_err("N'th occurrence (N=%d) of symbol '%s' not found.\n",
2097                        idx, sym_name);
2098         } else if (!idx) {
2099                 pr_err("Global symbol '%s' not found.\n", sym_name);
2100         } else {
2101                 pr_err("Symbol '%s' not found.\n", sym_name);
2102         }
2103         pr_err("Note that symbols must be functions.\n");
2104
2105         return -EINVAL;
2106 }
2107
2108 static int find_kern_sym(const char *sym_name, u64 *start, u64 *size, int idx)
2109 {
2110         struct sym_args args = {
2111                 .name = sym_name,
2112                 .idx = idx,
2113                 .global = !idx,
2114                 .selected = idx > 0,
2115         };
2116         int err;
2117
2118         *start = 0;
2119         *size = 0;
2120
2121         err = kallsyms__parse("/proc/kallsyms", &args, find_kern_sym_cb);
2122         if (err < 0) {
2123                 pr_err("Failed to parse /proc/kallsyms\n");
2124                 return err;
2125         }
2126
2127         if (args.duplicate) {
2128                 pr_err("Multiple kernel symbols with name '%s'\n", sym_name);
2129                 args.cnt = 0;
2130                 kallsyms__parse("/proc/kallsyms", &args, print_kern_sym_cb);
2131                 pr_err("Disambiguate symbol name by inserting #n after the name e.g. %s #2\n",
2132                        sym_name);
2133                 pr_err("Or select a global symbol by inserting #0 or #g or #G\n");
2134                 return -EINVAL;
2135         }
2136
2137         if (!args.started) {
2138                 pr_err("Kernel symbol lookup: ");
2139                 return sym_not_found_error(sym_name, idx);
2140         }
2141
2142         *start = args.start;
2143         *size = args.size;
2144
2145         return 0;
2146 }
2147
2148 static int find_entire_kern_cb(void *arg, const char *name __maybe_unused,
2149                                char type, u64 start)
2150 {
2151         struct sym_args *args = arg;
2152
2153         if (!kallsyms__is_function(type))
2154                 return 0;
2155
2156         if (!args->started) {
2157                 args->started = true;
2158                 args->start = start;
2159         }
2160         /* Don't know exactly where the kernel ends, so we add a page */
2161         args->size = round_up(start, page_size) + page_size - args->start;
2162
2163         return 0;
2164 }
2165
2166 static int addr_filter__entire_kernel(struct addr_filter *filt)
2167 {
2168         struct sym_args args = { .started = false };
2169         int err;
2170
2171         err = kallsyms__parse("/proc/kallsyms", &args, find_entire_kern_cb);
2172         if (err < 0 || !args.started) {
2173                 pr_err("Failed to parse /proc/kallsyms\n");
2174                 return err;
2175         }
2176
2177         filt->addr = args.start;
2178         filt->size = args.size;
2179
2180         return 0;
2181 }
2182
2183 static int check_end_after_start(struct addr_filter *filt, u64 start, u64 size)
2184 {
2185         if (start + size >= filt->addr)
2186                 return 0;
2187
2188         if (filt->sym_from) {
2189                 pr_err("Symbol '%s' (0x%"PRIx64") comes before '%s' (0x%"PRIx64")\n",
2190                        filt->sym_to, start, filt->sym_from, filt->addr);
2191         } else {
2192                 pr_err("Symbol '%s' (0x%"PRIx64") comes before address 0x%"PRIx64")\n",
2193                        filt->sym_to, start, filt->addr);
2194         }
2195
2196         return -EINVAL;
2197 }
2198
2199 static int addr_filter__resolve_kernel_syms(struct addr_filter *filt)
2200 {
2201         bool no_size = false;
2202         u64 start, size;
2203         int err;
2204
2205         if (symbol_conf.kptr_restrict) {
2206                 pr_err("Kernel addresses are restricted. Unable to resolve kernel symbols.\n");
2207                 return -EINVAL;
2208         }
2209
2210         if (filt->sym_from && !strcmp(filt->sym_from, "*"))
2211                 return addr_filter__entire_kernel(filt);
2212
2213         if (filt->sym_from) {
2214                 err = find_kern_sym(filt->sym_from, &start, &size,
2215                                     filt->sym_from_idx);
2216                 if (err)
2217                         return err;
2218                 filt->addr = start;
2219                 if (filt->range && !filt->size && !filt->sym_to) {
2220                         filt->size = size;
2221                         no_size = !size;
2222                 }
2223         }
2224
2225         if (filt->sym_to) {
2226                 err = find_kern_sym(filt->sym_to, &start, &size,
2227                                     filt->sym_to_idx);
2228                 if (err)
2229                         return err;
2230
2231                 err = check_end_after_start(filt, start, size);
2232                 if (err)
2233                         return err;
2234                 filt->size = start + size - filt->addr;
2235                 no_size = !size;
2236         }
2237
2238         /* The very last symbol in kallsyms does not imply a particular size */
2239         if (no_size) {
2240                 pr_err("Cannot determine size of symbol '%s'\n",
2241                        filt->sym_to ? filt->sym_to : filt->sym_from);
2242                 return -EINVAL;
2243         }
2244
2245         return 0;
2246 }
2247
2248 static struct dso *load_dso(const char *name)
2249 {
2250         struct map *map;
2251         struct dso *dso;
2252
2253         map = dso__new_map(name);
2254         if (!map)
2255                 return NULL;
2256
2257         if (map__load(map) < 0)
2258                 pr_err("File '%s' not found or has no symbols.\n", name);
2259
2260         dso = dso__get(map->dso);
2261
2262         map__put(map);
2263
2264         return dso;
2265 }
2266
2267 static bool dso_sym_match(struct symbol *sym, const char *name, int *cnt,
2268                           int idx)
2269 {
2270         /* Same name, and global or the n'th found or any */
2271         return !arch__compare_symbol_names(name, sym->name) &&
2272                ((!idx && sym->binding == STB_GLOBAL) ||
2273                 (idx > 0 && ++*cnt == idx) ||
2274                 idx < 0);
2275 }
2276
2277 static void print_duplicate_syms(struct dso *dso, const char *sym_name)
2278 {
2279         struct symbol *sym;
2280         bool near = false;
2281         int cnt = 0;
2282
2283         pr_err("Multiple symbols with name '%s'\n", sym_name);
2284
2285         sym = dso__first_symbol(dso);
2286         while (sym) {
2287                 if (dso_sym_match(sym, sym_name, &cnt, -1)) {
2288                         pr_err("#%d\t0x%"PRIx64"\t%c\t%s\n",
2289                                ++cnt, sym->start,
2290                                sym->binding == STB_GLOBAL ? 'g' :
2291                                sym->binding == STB_LOCAL  ? 'l' : 'w',
2292                                sym->name);
2293                         near = true;
2294                 } else if (near) {
2295                         near = false;
2296                         pr_err("\t\twhich is near\t\t%s\n", sym->name);
2297                 }
2298                 sym = dso__next_symbol(sym);
2299         }
2300
2301         pr_err("Disambiguate symbol name by inserting #n after the name e.g. %s #2\n",
2302                sym_name);
2303         pr_err("Or select a global symbol by inserting #0 or #g or #G\n");
2304 }
2305
2306 static int find_dso_sym(struct dso *dso, const char *sym_name, u64 *start,
2307                         u64 *size, int idx)
2308 {
2309         struct symbol *sym;
2310         int cnt = 0;
2311
2312         *start = 0;
2313         *size = 0;
2314
2315         sym = dso__first_symbol(dso);
2316         while (sym) {
2317                 if (*start) {
2318                         if (!*size)
2319                                 *size = sym->start - *start;
2320                         if (idx > 0) {
2321                                 if (*size)
2322                                         return 1;
2323                         } else if (dso_sym_match(sym, sym_name, &cnt, idx)) {
2324                                 print_duplicate_syms(dso, sym_name);
2325                                 return -EINVAL;
2326                         }
2327                 } else if (dso_sym_match(sym, sym_name, &cnt, idx)) {
2328                         *start = sym->start;
2329                         *size = sym->end - sym->start;
2330                 }
2331                 sym = dso__next_symbol(sym);
2332         }
2333
2334         if (!*start)
2335                 return sym_not_found_error(sym_name, idx);
2336
2337         return 0;
2338 }
2339
2340 static int addr_filter__entire_dso(struct addr_filter *filt, struct dso *dso)
2341 {
2342         if (dso__data_file_size(dso, NULL)) {
2343                 pr_err("Failed to determine filter for %s\nCannot determine file size.\n",
2344                        filt->filename);
2345                 return -EINVAL;
2346         }
2347
2348         filt->addr = 0;
2349         filt->size = dso->data.file_size;
2350
2351         return 0;
2352 }
2353
2354 static int addr_filter__resolve_syms(struct addr_filter *filt)
2355 {
2356         u64 start, size;
2357         struct dso *dso;
2358         int err = 0;
2359
2360         if (!filt->sym_from && !filt->sym_to)
2361                 return 0;
2362
2363         if (!filt->filename)
2364                 return addr_filter__resolve_kernel_syms(filt);
2365
2366         dso = load_dso(filt->filename);
2367         if (!dso) {
2368                 pr_err("Failed to load symbols from: %s\n", filt->filename);
2369                 return -EINVAL;
2370         }
2371
2372         if (filt->sym_from && !strcmp(filt->sym_from, "*")) {
2373                 err = addr_filter__entire_dso(filt, dso);
2374                 goto put_dso;
2375         }
2376
2377         if (filt->sym_from) {
2378                 err = find_dso_sym(dso, filt->sym_from, &start, &size,
2379                                    filt->sym_from_idx);
2380                 if (err)
2381                         goto put_dso;
2382                 filt->addr = start;
2383                 if (filt->range && !filt->size && !filt->sym_to)
2384                         filt->size = size;
2385         }
2386
2387         if (filt->sym_to) {
2388                 err = find_dso_sym(dso, filt->sym_to, &start, &size,
2389                                    filt->sym_to_idx);
2390                 if (err)
2391                         goto put_dso;
2392
2393                 err = check_end_after_start(filt, start, size);
2394                 if (err)
2395                         return err;
2396
2397                 filt->size = start + size - filt->addr;
2398         }
2399
2400 put_dso:
2401         dso__put(dso);
2402
2403         return err;
2404 }
2405
2406 static char *addr_filter__to_str(struct addr_filter *filt)
2407 {
2408         char filename_buf[PATH_MAX];
2409         const char *at = "";
2410         const char *fn = "";
2411         char *filter;
2412         int err;
2413
2414         if (filt->filename) {
2415                 at = "@";
2416                 fn = realpath(filt->filename, filename_buf);
2417                 if (!fn)
2418                         return NULL;
2419         }
2420
2421         if (filt->range) {
2422                 err = asprintf(&filter, "%s 0x%"PRIx64"/0x%"PRIx64"%s%s",
2423                                filt->action, filt->addr, filt->size, at, fn);
2424         } else {
2425                 err = asprintf(&filter, "%s 0x%"PRIx64"%s%s",
2426                                filt->action, filt->addr, at, fn);
2427         }
2428
2429         return err < 0 ? NULL : filter;
2430 }
2431
2432 static int parse_addr_filter(struct evsel *evsel, const char *filter,
2433                              int max_nr)
2434 {
2435         struct addr_filters filts;
2436         struct addr_filter *filt;
2437         int err;
2438
2439         addr_filters__init(&filts);
2440
2441         err = addr_filters__parse_bare_filter(&filts, filter);
2442         if (err)
2443                 goto out_exit;
2444
2445         if (filts.cnt > max_nr) {
2446                 pr_err("Error: number of address filters (%d) exceeds maximum (%d)\n",
2447                        filts.cnt, max_nr);
2448                 err = -EINVAL;
2449                 goto out_exit;
2450         }
2451
2452         list_for_each_entry(filt, &filts.head, list) {
2453                 char *new_filter;
2454
2455                 err = addr_filter__resolve_syms(filt);
2456                 if (err)
2457                         goto out_exit;
2458
2459                 new_filter = addr_filter__to_str(filt);
2460                 if (!new_filter) {
2461                         err = -ENOMEM;
2462                         goto out_exit;
2463                 }
2464
2465                 if (perf_evsel__append_addr_filter(evsel, new_filter)) {
2466                         err = -ENOMEM;
2467                         goto out_exit;
2468                 }
2469         }
2470
2471 out_exit:
2472         addr_filters__exit(&filts);
2473
2474         if (err) {
2475                 pr_err("Failed to parse address filter: '%s'\n", filter);
2476                 pr_err("Filter format is: filter|start|stop|tracestop <start symbol or address> [/ <end symbol or size>] [@<file name>]\n");
2477                 pr_err("Where multiple filters are separated by space or comma.\n");
2478         }
2479
2480         return err;
2481 }
2482
2483 static int perf_evsel__nr_addr_filter(struct evsel *evsel)
2484 {
2485         struct perf_pmu *pmu = perf_evsel__find_pmu(evsel);
2486         int nr_addr_filters = 0;
2487
2488         if (!pmu)
2489                 return 0;
2490
2491         perf_pmu__scan_file(pmu, "nr_addr_filters", "%d", &nr_addr_filters);
2492
2493         return nr_addr_filters;
2494 }
2495
2496 int auxtrace_parse_filters(struct evlist *evlist)
2497 {
2498         struct evsel *evsel;
2499         char *filter;
2500         int err, max_nr;
2501
2502         evlist__for_each_entry(evlist, evsel) {
2503                 filter = evsel->filter;
2504                 max_nr = perf_evsel__nr_addr_filter(evsel);
2505                 if (!filter || !max_nr)
2506                         continue;
2507                 evsel->filter = NULL;
2508                 err = parse_addr_filter(evsel, filter, max_nr);
2509                 free(filter);
2510                 if (err)
2511                         return err;
2512                 pr_debug("Address filter: %s\n", evsel->filter);
2513         }
2514
2515         return 0;
2516 }
2517
2518 int auxtrace__process_event(struct perf_session *session, union perf_event *event,
2519                             struct perf_sample *sample, struct perf_tool *tool)
2520 {
2521         if (!session->auxtrace)
2522                 return 0;
2523
2524         return session->auxtrace->process_event(session, event, sample, tool);
2525 }
2526
2527 void auxtrace__dump_auxtrace_sample(struct perf_session *session,
2528                                     struct perf_sample *sample)
2529 {
2530         if (!session->auxtrace || !session->auxtrace->dump_auxtrace_sample ||
2531             auxtrace__dont_decode(session))
2532                 return;
2533
2534         session->auxtrace->dump_auxtrace_sample(session, sample);
2535 }
2536
2537 int auxtrace__flush_events(struct perf_session *session, struct perf_tool *tool)
2538 {
2539         if (!session->auxtrace)
2540                 return 0;
2541
2542         return session->auxtrace->flush_events(session, tool);
2543 }
2544
2545 void auxtrace__free_events(struct perf_session *session)
2546 {
2547         if (!session->auxtrace)
2548                 return;
2549
2550         return session->auxtrace->free_events(session);
2551 }
2552
2553 void auxtrace__free(struct perf_session *session)
2554 {
2555         if (!session->auxtrace)
2556                 return;
2557
2558         return session->auxtrace->free(session);
2559 }