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                 itr->evlist = evlist;
 634                 return itr->recording_options(itr, evlist, opts);
 635         }
 636         return 0;
 637 }
 638
 639 u64 auxtrace_record__reference(struct auxtrace_record *itr)
 640 {
 641         if (itr)
 642                 return itr->reference(itr);
 643         return 0;
 644 }
 645
 646 int auxtrace_parse_snapshot_options(struct auxtrace_record *itr,
 647                                     struct record_opts *opts, const char *str)
 648 {
 649         if (!str)
 650                 return 0;
 651
 652         /* PMU-agnostic options */
 653         switch (*str) {
 654         case 'e':
 655                 opts->auxtrace_snapshot_on_exit = true;
 656                 str++;
 657                 break;
 658         default:
 659                 break;
 660         }
 661
 662         if (itr)
 663                 return itr->parse_snapshot_options(itr, opts, str);
 664
 665         pr_err("No AUX area tracing to snapshot\n");
 666         return -EINVAL;
 667 }
 668
 669 int auxtrace_record__read_finish(struct auxtrace_record *itr, int idx)
 670 {
 671         struct evsel *evsel;
 672
 673         if (!itr->evlist || !itr->pmu)
 674                 return -EINVAL;
 675
 676         evlist__for_each_entry(itr->evlist, evsel) {
 677                 if (evsel->core.attr.type == itr->pmu->type) {
 678                         if (evsel->disabled)
 679                                 return 0;
 680                         return perf_evlist__enable_event_idx(itr->evlist, evsel,
 681                                                              idx);
 682                 }
 683         }
 684         return -EINVAL;
 685 }
 686
 687 /*
 688  * Event record size is 16-bit which results in a maximum size of about 64KiB.
 689  * Allow about 4KiB for the rest of the sample record, to give a maximum
 690  * AUX area sample size of 60KiB.
 691  */
 692 #define MAX_AUX_SAMPLE_SIZE (60 * 1024)
 693
 694 /* Arbitrary default size if no other default provided */
 695 #define DEFAULT_AUX_SAMPLE_SIZE (4 * 1024)
 696
 697 static int auxtrace_validate_aux_sample_size(struct evlist *evlist,
 698                                              struct record_opts *opts)
 699 {
 700         struct evsel *evsel;
 701         bool has_aux_leader = false;
 702         u32 sz;
 703
 704         evlist__for_each_entry(evlist, evsel) {
 705                 sz = evsel->core.attr.aux_sample_size;
 706                 if (perf_evsel__is_group_leader(evsel)) {
 707                         has_aux_leader = perf_evsel__is_aux_event(evsel);
 708                         if (sz) {
 709                                 if (has_aux_leader)
 710                                         pr_err("Cannot add AUX area sampling to an AUX area event\n");
 711                                 else
 712                                         pr_err("Cannot add AUX area sampling to a group leader\n");
 713                                 return -EINVAL;
 714                         }
 715                 }
 716                 if (sz > MAX_AUX_SAMPLE_SIZE) {
 717                         pr_err("AUX area sample size %u too big, max. %d\n",
 718                                sz, MAX_AUX_SAMPLE_SIZE);
 719                         return -EINVAL;
 720                 }
 721                 if (sz) {
 722                         if (!has_aux_leader) {
 723                                 pr_err("Cannot add AUX area sampling because group leader is not an AUX area event\n");
 724                                 return -EINVAL;
 725                         }
 726                         perf_evsel__set_sample_bit(evsel, AUX);
 727                         opts->auxtrace_sample_mode = true;
 728                 } else {
 729                         perf_evsel__reset_sample_bit(evsel, AUX);
 730                 }
 731         }
 732
 733         if (!opts->auxtrace_sample_mode) {
 734                 pr_err("AUX area sampling requires an AUX area event group leader plus other events to which to add samples\n");
 735                 return -EINVAL;
 736         }
 737
 738         if (!perf_can_aux_sample()) {
 739                 pr_err("AUX area sampling is not supported by kernel\n");
 740                 return -EINVAL;
 741         }
 742
 743         return 0;
 744 }
 745
 746 int auxtrace_parse_sample_options(struct auxtrace_record *itr,
 747                                   struct evlist *evlist,
 748                                   struct record_opts *opts, const char *str)
 749 {
 750         struct perf_evsel_config_term *term;
 751         struct evsel *aux_evsel;
 752         bool has_aux_sample_size = false;
 753         bool has_aux_leader = false;
 754         struct evsel *evsel;
 755         char *endptr;
 756         unsigned long sz;
 757
 758         if (!str)
 759                 goto no_opt;
 760
 761         if (!itr) {
 762                 pr_err("No AUX area event to sample\n");
 763                 return -EINVAL;
 764         }
 765
 766         sz = strtoul(str, &endptr, 0);
 767         if (*endptr || sz > UINT_MAX) {
 768                 pr_err("Bad AUX area sampling option: '%s'\n", str);
 769                 return -EINVAL;
 770         }
 771
 772         if (!sz)
 773                 sz = itr->default_aux_sample_size;
 774
 775         if (!sz)
 776                 sz = DEFAULT_AUX_SAMPLE_SIZE;
 777
 778         /* Set aux_sample_size based on --aux-sample option */
 779         evlist__for_each_entry(evlist, evsel) {
 780                 if (perf_evsel__is_group_leader(evsel)) {
 781                         has_aux_leader = perf_evsel__is_aux_event(evsel);
 782                 } else if (has_aux_leader) {
 783                         evsel->core.attr.aux_sample_size = sz;
 784                 }
 785         }
 786 no_opt:
 787         aux_evsel = NULL;
 788         /* Override with aux_sample_size from config term */
 789         evlist__for_each_entry(evlist, evsel) {
 790                 if (perf_evsel__is_aux_event(evsel))
 791                         aux_evsel = evsel;
 792                 term = perf_evsel__get_config_term(evsel, AUX_SAMPLE_SIZE);
 793                 if (term) {
 794                         has_aux_sample_size = true;
 795                         evsel->core.attr.aux_sample_size = term->val.aux_sample_size;
 796                         /* If possible, group with the AUX event */
 797                         if (aux_evsel && evsel->core.attr.aux_sample_size)
 798                                 perf_evlist__regroup(evlist, aux_evsel, evsel);
 799                 }
 800         }
 801
 802         if (!str && !has_aux_sample_size)
 803                 return 0;
 804
 805         if (!itr) {
 806                 pr_err("No AUX area event to sample\n");
 807                 return -EINVAL;
 808         }
 809
 810         return auxtrace_validate_aux_sample_size(evlist, opts);
 811 }
 812
 813 struct auxtrace_record *__weak
 814 auxtrace_record__init(struct evlist *evlist __maybe_unused, int *err)
 815 {
 816         *err = 0;
 817         return NULL;
 818 }
 819
 820 static int auxtrace_index__alloc(struct list_head *head)
 821 {
 822         struct auxtrace_index *auxtrace_index;
 823
 824         auxtrace_index = malloc(sizeof(struct auxtrace_index));
 825         if (!auxtrace_index)
 826                 return -ENOMEM;
 827
 828         auxtrace_index->nr = 0;
 829         INIT_LIST_HEAD(&auxtrace_index->list);
 830
 831         list_add_tail(&auxtrace_index->list, head);
 832
 833         return 0;
 834 }
 835
 836 void auxtrace_index__free(struct list_head *head)
 837 {
 838         struct auxtrace_index *auxtrace_index, *n;
 839
 840         list_for_each_entry_safe(auxtrace_index, n, head, list) {
 841                 list_del_init(&auxtrace_index->list);
 842                 free(auxtrace_index);
 843         }
 844 }
 845
 846 static struct auxtrace_index *auxtrace_index__last(struct list_head *head)
 847 {
 848         struct auxtrace_index *auxtrace_index;
 849         int err;
 850
 851         if (list_empty(head)) {
 852                 err = auxtrace_index__alloc(head);
 853                 if (err)
 854                         return NULL;
 855         }
 856
 857         auxtrace_index = list_entry(head->prev, struct auxtrace_index, list);
 858
 859         if (auxtrace_index->nr >= PERF_AUXTRACE_INDEX_ENTRY_COUNT) {
 860                 err = auxtrace_index__alloc(head);
 861                 if (err)
 862                         return NULL;
 863                 auxtrace_index = list_entry(head->prev, struct auxtrace_index,
 864                                             list);
 865         }
 866
 867         return auxtrace_index;
 868 }
 869
 870 int auxtrace_index__auxtrace_event(struct list_head *head,
 871                                    union perf_event *event, off_t file_offset)
 872 {
 873         struct auxtrace_index *auxtrace_index;
 874         size_t nr;
 875
 876         auxtrace_index = auxtrace_index__last(head);
 877         if (!auxtrace_index)
 878                 return -ENOMEM;
 879
 880         nr = auxtrace_index->nr;
 881         auxtrace_index->entries[nr].file_offset = file_offset;
 882         auxtrace_index->entries[nr].sz = event->header.size;
 883         auxtrace_index->nr += 1;
 884
 885         return 0;
 886 }
 887
 888 static int auxtrace_index__do_write(int fd,
 889                                     struct auxtrace_index *auxtrace_index)
 890 {
 891         struct auxtrace_index_entry ent;
 892         size_t i;
 893
 894         for (i = 0; i < auxtrace_index->nr; i++) {
 895                 ent.file_offset = auxtrace_index->entries[i].file_offset;
 896                 ent.sz = auxtrace_index->entries[i].sz;
 897                 if (writen(fd, &ent, sizeof(ent)) != sizeof(ent))
 898                         return -errno;
 899         }
 900         return 0;
 901 }
 902
 903 int auxtrace_index__write(int fd, struct list_head *head)
 904 {
 905         struct auxtrace_index *auxtrace_index;
 906         u64 total = 0;
 907         int err;
 908
 909         list_for_each_entry(auxtrace_index, head, list)
 910                 total += auxtrace_index->nr;
 911
 912         if (writen(fd, &total, sizeof(total)) != sizeof(total))
 913                 return -errno;
 914
 915         list_for_each_entry(auxtrace_index, head, list) {
 916                 err = auxtrace_index__do_write(fd, auxtrace_index);
 917                 if (err)
 918                         return err;
 919         }
 920
 921         return 0;
 922 }
 923
 924 static int auxtrace_index__process_entry(int fd, struct list_head *head,
 925                                          bool needs_swap)
 926 {
 927         struct auxtrace_index *auxtrace_index;
 928         struct auxtrace_index_entry ent;
 929         size_t nr;
 930
 931         if (readn(fd, &ent, sizeof(ent)) != sizeof(ent))
 932                 return -1;
 933
 934         auxtrace_index = auxtrace_index__last(head);
 935         if (!auxtrace_index)
 936                 return -1;
 937
 938         nr = auxtrace_index->nr;
 939         if (needs_swap) {
 940                 auxtrace_index->entries[nr].file_offset =
 941                                                 bswap_64(ent.file_offset);
 942                 auxtrace_index->entries[nr].sz = bswap_64(ent.sz);
 943         } else {
 944                 auxtrace_index->entries[nr].file_offset = ent.file_offset;
 945                 auxtrace_index->entries[nr].sz = ent.sz;
 946         }
 947
 948         auxtrace_index->nr = nr + 1;
 949
 950         return 0;
 951 }
 952
 953 int auxtrace_index__process(int fd, u64 size, struct perf_session *session,
 954                             bool needs_swap)
 955 {
 956         struct list_head *head = &session->auxtrace_index;
 957         u64 nr;
 958
 959         if (readn(fd, &nr, sizeof(u64)) != sizeof(u64))
 960                 return -1;
 961
 962         if (needs_swap)
 963                 nr = bswap_64(nr);
 964
 965         if (sizeof(u64) + nr * sizeof(struct auxtrace_index_entry) > size)
 966                 return -1;
 967
 968         while (nr--) {
 969                 int err;
 970
 971                 err = auxtrace_index__process_entry(fd, head, needs_swap);
 972                 if (err)
 973                         return -1;
 974         }
 975
 976         return 0;
 977 }
 978
 979 static int auxtrace_queues__process_index_entry(struct auxtrace_queues *queues,
 980                                                 struct perf_session *session,
 981                                                 struct auxtrace_index_entry *ent)
 982 {
 983         return auxtrace_queues__add_indexed_event(queues, session,
 984                                                   ent->file_offset, ent->sz);
 985 }
 986
 987 int auxtrace_queues__process_index(struct auxtrace_queues *queues,
 988                                    struct perf_session *session)
 989 {
 990         struct auxtrace_index *auxtrace_index;
 991         struct auxtrace_index_entry *ent;
 992         size_t i;
 993         int err;
 994
 995         if (auxtrace__dont_decode(session))
 996                 return 0;
 997
 998         list_for_each_entry(auxtrace_index, &session->auxtrace_index, list) {
 999                 for (i = 0; i < auxtrace_index->nr; i++) {
1000                         ent = &auxtrace_index->entries[i];
1001                         err = auxtrace_queues__process_index_entry(queues,
1002                                                                    session,
1003                                                                    ent);
1004                         if (err)
1005                                 return err;
1006                 }
1007         }
1008         return 0;
1009 }
1010
1011 struct auxtrace_buffer *auxtrace_buffer__next(struct auxtrace_queue *queue,
1012                                               struct auxtrace_buffer *buffer)
1013 {
1014         if (buffer) {
1015                 if (list_is_last(&buffer->list, &queue->head))
1016                         return NULL;
1017                 return list_entry(buffer->list.next, struct auxtrace_buffer,
1018                                   list);
1019         } else {
1020                 if (list_empty(&queue->head))
1021                         return NULL;
1022                 return list_entry(queue->head.next, struct auxtrace_buffer,
1023                                   list);
1024         }
1025 }
1026
1027 struct auxtrace_queue *auxtrace_queues__sample_queue(struct auxtrace_queues *queues,
1028                                                      struct perf_sample *sample,
1029                                                      struct perf_session *session)
1030 {
1031         struct perf_sample_id *sid;
1032         unsigned int idx;
1033         u64 id;
1034
1035         id = sample->id;
1036         if (!id)
1037                 return NULL;
1038
1039         sid = perf_evlist__id2sid(session->evlist, id);
1040         if (!sid)
1041                 return NULL;
1042
1043         idx = sid->idx;
1044
1045         if (idx >= queues->nr_queues)
1046                 return NULL;
1047
1048         return &queues->queue_array[idx];
1049 }
1050
1051 int auxtrace_queues__add_sample(struct auxtrace_queues *queues,
1052                                 struct perf_session *session,
1053                                 struct perf_sample *sample, u64 data_offset,
1054                                 u64 reference)
1055 {
1056         struct auxtrace_buffer buffer = {
1057                 .pid = -1,
1058                 .data_offset = data_offset,
1059                 .reference = reference,
1060                 .size = sample->aux_sample.size,
1061         };
1062         struct perf_sample_id *sid;
1063         u64 id = sample->id;
1064         unsigned int idx;
1065
1066         if (!id)
1067                 return -EINVAL;
1068
1069         sid = perf_evlist__id2sid(session->evlist, id);
1070         if (!sid)
1071                 return -ENOENT;
1072
1073         idx = sid->idx;
1074         buffer.tid = sid->tid;
1075         buffer.cpu = sid->cpu;
1076
1077         return auxtrace_queues__add_buffer(queues, session, idx, &buffer, NULL);
1078 }
1079
1080 struct queue_data {
1081         bool samples;
1082         bool events;
1083 };
1084
1085 static int auxtrace_queue_data_cb(struct perf_session *session,
1086                                   union perf_event *event, u64 offset,
1087                                   void *data)
1088 {
1089         struct queue_data *qd = data;
1090         struct perf_sample sample;
1091         int err;
1092
1093         if (qd->events && event->header.type == PERF_RECORD_AUXTRACE) {
1094                 if (event->header.size < sizeof(struct perf_record_auxtrace))
1095                         return -EINVAL;
1096                 offset += event->header.size;
1097                 return session->auxtrace->queue_data(session, NULL, event,
1098                                                      offset);
1099         }
1100
1101         if (!qd->samples || event->header.type != PERF_RECORD_SAMPLE)
1102                 return 0;
1103
1104         err = perf_evlist__parse_sample(session->evlist, event, &sample);
1105         if (err)
1106                 return err;
1107
1108         if (!sample.aux_sample.size)
1109                 return 0;
1110
1111         offset += sample.aux_sample.data - (void *)event;
1112
1113         return session->auxtrace->queue_data(session, &sample, NULL, offset);
1114 }
1115
1116 int auxtrace_queue_data(struct perf_session *session, bool samples, bool events)
1117 {
1118         struct queue_data qd = {
1119                 .samples = samples,
1120                 .events = events,
1121         };
1122
1123         if (auxtrace__dont_decode(session))
1124                 return 0;
1125
1126         if (!session->auxtrace || !session->auxtrace->queue_data)
1127                 return -EINVAL;
1128
1129         return perf_session__peek_events(session, session->header.data_offset,
1130                                          session->header.data_size,
1131                                          auxtrace_queue_data_cb, &qd);
1132 }
1133
1134 void *auxtrace_buffer__get_data(struct auxtrace_buffer *buffer, int fd)
1135 {
1136         size_t adj = buffer->data_offset & (page_size - 1);
1137         size_t size = buffer->size + adj;
1138         off_t file_offset = buffer->data_offset - adj;
1139         void *addr;
1140
1141         if (buffer->data)
1142                 return buffer->data;
1143
1144         addr = mmap(NULL, size, PROT_READ, MAP_SHARED, fd, file_offset);
1145         if (addr == MAP_FAILED)
1146                 return NULL;
1147
1148         buffer->mmap_addr = addr;
1149         buffer->mmap_size = size;
1150
1151         buffer->data = addr + adj;
1152
1153         return buffer->data;
1154 }
1155
1156 void auxtrace_buffer__put_data(struct auxtrace_buffer *buffer)
1157 {
1158         if (!buffer->data || !buffer->mmap_addr)
1159                 return;
1160         munmap(buffer->mmap_addr, buffer->mmap_size);
1161         buffer->mmap_addr = NULL;
1162         buffer->mmap_size = 0;
1163         buffer->data = NULL;
1164         buffer->use_data = NULL;
1165 }
1166
1167 void auxtrace_buffer__drop_data(struct auxtrace_buffer *buffer)
1168 {
1169         auxtrace_buffer__put_data(buffer);
1170         if (buffer->data_needs_freeing) {
1171                 buffer->data_needs_freeing = false;
1172                 zfree(&buffer->data);
1173                 buffer->use_data = NULL;
1174                 buffer->size = 0;
1175         }
1176 }
1177
1178 void auxtrace_buffer__free(struct auxtrace_buffer *buffer)
1179 {
1180         auxtrace_buffer__drop_data(buffer);
1181         free(buffer);
1182 }
1183
1184 void auxtrace_synth_error(struct perf_record_auxtrace_error *auxtrace_error, int type,
1185                           int code, int cpu, pid_t pid, pid_t tid, u64 ip,
1186                           const char *msg, u64 timestamp)
1187 {
1188         size_t size;
1189
1190         memset(auxtrace_error, 0, sizeof(struct perf_record_auxtrace_error));
1191
1192         auxtrace_error->header.type = PERF_RECORD_AUXTRACE_ERROR;
1193         auxtrace_error->type = type;
1194         auxtrace_error->code = code;
1195         auxtrace_error->cpu = cpu;
1196         auxtrace_error->pid = pid;
1197         auxtrace_error->tid = tid;
1198         auxtrace_error->fmt = 1;
1199         auxtrace_error->ip = ip;
1200         auxtrace_error->time = timestamp;
1201         strlcpy(auxtrace_error->msg, msg, MAX_AUXTRACE_ERROR_MSG);
1202
1203         size = (void *)auxtrace_error->msg - (void *)auxtrace_error +
1204                strlen(auxtrace_error->msg) + 1;
1205         auxtrace_error->header.size = PERF_ALIGN(size, sizeof(u64));
1206 }
1207
1208 int perf_event__synthesize_auxtrace_info(struct auxtrace_record *itr,
1209                                          struct perf_tool *tool,
1210                                          struct perf_session *session,
1211                                          perf_event__handler_t process)
1212 {
1213         union perf_event *ev;
1214         size_t priv_size;
1215         int err;
1216
1217         pr_debug2("Synthesizing auxtrace information\n");
1218         priv_size = auxtrace_record__info_priv_size(itr, session->evlist);
1219         ev = zalloc(sizeof(struct perf_record_auxtrace_info) + priv_size);
1220         if (!ev)
1221                 return -ENOMEM;
1222
1223         ev->auxtrace_info.header.type = PERF_RECORD_AUXTRACE_INFO;
1224         ev->auxtrace_info.header.size = sizeof(struct perf_record_auxtrace_info) +
1225                                         priv_size;
1226         err = auxtrace_record__info_fill(itr, session, &ev->auxtrace_info,
1227                                          priv_size);
1228         if (err)
1229                 goto out_free;
1230
1231         err = process(tool, ev, NULL, NULL);
1232 out_free:
1233         free(ev);
1234         return err;
1235 }
1236
1237 int perf_event__process_auxtrace_info(struct perf_session *session,
1238                                       union perf_event *event)
1239 {
1240         enum auxtrace_type type = event->auxtrace_info.type;
1241
1242         if (dump_trace)
1243                 fprintf(stdout, " type: %u\n", type);
1244
1245         switch (type) {
1246         case PERF_AUXTRACE_INTEL_PT:
1247                 return intel_pt_process_auxtrace_info(event, session);
1248         case PERF_AUXTRACE_INTEL_BTS:
1249                 return intel_bts_process_auxtrace_info(event, session);
1250         case PERF_AUXTRACE_ARM_SPE:
1251                 return arm_spe_process_auxtrace_info(event, session);
1252         case PERF_AUXTRACE_CS_ETM:
1253                 return cs_etm__process_auxtrace_info(event, session);
1254         case PERF_AUXTRACE_S390_CPUMSF:
1255                 return s390_cpumsf_process_auxtrace_info(event, session);
1256         case PERF_AUXTRACE_UNKNOWN:
1257         default:
1258                 return -EINVAL;
1259         }
1260 }
1261
1262 s64 perf_event__process_auxtrace(struct perf_session *session,
1263                                  union perf_event *event)
1264 {
1265         s64 err;
1266
1267         if (dump_trace)
1268                 fprintf(stdout, " size: %#"PRI_lx64"  offset: %#"PRI_lx64"  ref: %#"PRI_lx64"  idx: %u  tid: %d  cpu: %d\n",
1269                         event->auxtrace.size, event->auxtrace.offset,
1270                         event->auxtrace.reference, event->auxtrace.idx,
1271                         event->auxtrace.tid, event->auxtrace.cpu);
1272
1273         if (auxtrace__dont_decode(session))
1274                 return event->auxtrace.size;
1275
1276         if (!session->auxtrace || event->header.type != PERF_RECORD_AUXTRACE)
1277                 return -EINVAL;
1278
1279         err = session->auxtrace->process_auxtrace_event(session, event, session->tool);
1280         if (err < 0)
1281                 return err;
1282
1283         return event->auxtrace.size;
1284 }
1285
1286 #define PERF_ITRACE_DEFAULT_PERIOD_TYPE         PERF_ITRACE_PERIOD_NANOSECS
1287 #define PERF_ITRACE_DEFAULT_PERIOD              100000
1288 #define PERF_ITRACE_DEFAULT_CALLCHAIN_SZ        16
1289 #define PERF_ITRACE_MAX_CALLCHAIN_SZ            1024
1290 #define PERF_ITRACE_DEFAULT_LAST_BRANCH_SZ      64
1291 #define PERF_ITRACE_MAX_LAST_BRANCH_SZ          1024
1292
1293 void itrace_synth_opts__set_default(struct itrace_synth_opts *synth_opts,
1294                                     bool no_sample)
1295 {
1296         synth_opts->branches = true;
1297         synth_opts->transactions = true;
1298         synth_opts->ptwrites = true;
1299         synth_opts->pwr_events = true;
1300         synth_opts->other_events = true;
1301         synth_opts->errors = true;
1302         if (no_sample) {
1303                 synth_opts->period_type = PERF_ITRACE_PERIOD_INSTRUCTIONS;
1304                 synth_opts->period = 1;
1305                 synth_opts->calls = true;
1306         } else {
1307                 synth_opts->instructions = true;
1308                 synth_opts->period_type = PERF_ITRACE_DEFAULT_PERIOD_TYPE;
1309                 synth_opts->period = PERF_ITRACE_DEFAULT_PERIOD;
1310         }
1311         synth_opts->callchain_sz = PERF_ITRACE_DEFAULT_CALLCHAIN_SZ;
1312         synth_opts->last_branch_sz = PERF_ITRACE_DEFAULT_LAST_BRANCH_SZ;
1313         synth_opts->initial_skip = 0;
1314 }
1315
1316 /*
1317  * Please check tools/perf/Documentation/perf-script.txt for information
1318  * about the options parsed here, which is introduced after this cset,
1319  * when support in 'perf script' for these options is introduced.
1320  */
1321 int itrace_parse_synth_opts(const struct option *opt, const char *str,
1322                             int unset)
1323 {
1324         struct itrace_synth_opts *synth_opts = opt->value;
1325         const char *p;
1326         char *endptr;
1327         bool period_type_set = false;
1328         bool period_set = false;
1329
1330         synth_opts->set = true;
1331
1332         if (unset) {
1333                 synth_opts->dont_decode = true;
1334                 return 0;
1335         }
1336
1337         if (!str) {
1338                 itrace_synth_opts__set_default(synth_opts,
1339                                                synth_opts->default_no_sample);
1340                 return 0;
1341         }
1342
1343         for (p = str; *p;) {
1344                 switch (*p++) {
1345                 case 'i':
1346                         synth_opts->instructions = true;
1347                         while (*p == ' ' || *p == ',')
1348                                 p += 1;
1349                         if (isdigit(*p)) {
1350                                 synth_opts->period = strtoull(p, &endptr, 10);
1351                                 period_set = true;
1352                                 p = endptr;
1353                                 while (*p == ' ' || *p == ',')
1354                                         p += 1;
1355                                 switch (*p++) {
1356                                 case 'i':
1357                                         synth_opts->period_type =
1358                                                 PERF_ITRACE_PERIOD_INSTRUCTIONS;
1359                                         period_type_set = true;
1360                                         break;
1361                                 case 't':
1362                                         synth_opts->period_type =
1363                                                 PERF_ITRACE_PERIOD_TICKS;
1364                                         period_type_set = true;
1365                                         break;
1366                                 case 'm':
1367                                         synth_opts->period *= 1000;
1368                                         /* Fall through */
1369                                 case 'u':
1370                                         synth_opts->period *= 1000;
1371                                         /* Fall through */
1372                                 case 'n':
1373                                         if (*p++ != 's')
1374                                                 goto out_err;
1375                                         synth_opts->period_type =
1376                                                 PERF_ITRACE_PERIOD_NANOSECS;
1377                                         period_type_set = true;
1378                                         break;
1379                                 case '\0':
1380                                         goto out;
1381                                 default:
1382                                         goto out_err;
1383                                 }
1384                         }
1385                         break;
1386                 case 'b':
1387                         synth_opts->branches = true;
1388                         break;
1389                 case 'x':
1390                         synth_opts->transactions = true;
1391                         break;
1392                 case 'w':
1393                         synth_opts->ptwrites = true;
1394                         break;
1395                 case 'p':
1396                         synth_opts->pwr_events = true;
1397                         break;
1398                 case 'o':
1399                         synth_opts->other_events = true;
1400                         break;
1401                 case 'e':
1402                         synth_opts->errors = true;
1403                         break;
1404                 case 'd':
1405                         synth_opts->log = true;
1406                         break;
1407                 case 'c':
1408                         synth_opts->branches = true;
1409                         synth_opts->calls = true;
1410                         break;
1411                 case 'r':
1412                         synth_opts->branches = true;
1413                         synth_opts->returns = true;
1414                         break;
1415                 case 'g':
1416                         synth_opts->callchain = true;
1417                         synth_opts->callchain_sz =
1418                                         PERF_ITRACE_DEFAULT_CALLCHAIN_SZ;
1419                         while (*p == ' ' || *p == ',')
1420                                 p += 1;
1421                         if (isdigit(*p)) {
1422                                 unsigned int val;
1423
1424                                 val = strtoul(p, &endptr, 10);
1425                                 p = endptr;
1426                                 if (!val || val > PERF_ITRACE_MAX_CALLCHAIN_SZ)
1427                                         goto out_err;
1428                                 synth_opts->callchain_sz = val;
1429                         }
1430                         break;
1431                 case 'l':
1432                         synth_opts->last_branch = true;
1433                         synth_opts->last_branch_sz =
1434                                         PERF_ITRACE_DEFAULT_LAST_BRANCH_SZ;
1435                         while (*p == ' ' || *p == ',')
1436                                 p += 1;
1437                         if (isdigit(*p)) {
1438                                 unsigned int val;
1439
1440                                 val = strtoul(p, &endptr, 10);
1441                                 p = endptr;
1442                                 if (!val ||
1443                                     val > PERF_ITRACE_MAX_LAST_BRANCH_SZ)
1444                                         goto out_err;
1445                                 synth_opts->last_branch_sz = val;
1446                         }
1447                         break;
1448                 case 's':
1449                         synth_opts->initial_skip = strtoul(p, &endptr, 10);
1450                         if (p == endptr)
1451                                 goto out_err;
1452                         p = endptr;
1453                         break;
1454                 case ' ':
1455                 case ',':
1456                         break;
1457                 default:
1458                         goto out_err;
1459                 }
1460         }
1461 out:
1462         if (synth_opts->instructions) {
1463                 if (!period_type_set)
1464                         synth_opts->period_type =
1465                                         PERF_ITRACE_DEFAULT_PERIOD_TYPE;
1466                 if (!period_set)
1467                         synth_opts->period = PERF_ITRACE_DEFAULT_PERIOD;
1468         }
1469
1470         return 0;
1471
1472 out_err:
1473         pr_err("Bad Instruction Tracing options '%s'\n", str);
1474         return -EINVAL;
1475 }
1476
1477 static const char * const auxtrace_error_type_name[] = {
1478         [PERF_AUXTRACE_ERROR_ITRACE] = "instruction trace",
1479 };
1480
1481 static const char *auxtrace_error_name(int type)
1482 {
1483         const char *error_type_name = NULL;
1484
1485         if (type < PERF_AUXTRACE_ERROR_MAX)
1486                 error_type_name = auxtrace_error_type_name[type];
1487         if (!error_type_name)
1488                 error_type_name = "unknown AUX";
1489         return error_type_name;
1490 }
1491
1492 size_t perf_event__fprintf_auxtrace_error(union perf_event *event, FILE *fp)
1493 {
1494         struct perf_record_auxtrace_error *e = &event->auxtrace_error;
1495         unsigned long long nsecs = e->time;
1496         const char *msg = e->msg;
1497         int ret;
1498
1499         ret = fprintf(fp, " %s error type %u",
1500                       auxtrace_error_name(e->type), e->type);
1501
1502         if (e->fmt && nsecs) {
1503                 unsigned long secs = nsecs / NSEC_PER_SEC;
1504
1505                 nsecs -= secs * NSEC_PER_SEC;
1506                 ret += fprintf(fp, " time %lu.%09llu", secs, nsecs);
1507         } else {
1508                 ret += fprintf(fp, " time 0");
1509         }
1510
1511         if (!e->fmt)
1512                 msg = (const char *)&e->time;
1513
1514         ret += fprintf(fp, " cpu %d pid %d tid %d ip %#"PRI_lx64" code %u: %s\n",
1515                        e->cpu, e->pid, e->tid, e->ip, e->code, msg);
1516         return ret;
1517 }
1518
1519 void perf_session__auxtrace_error_inc(struct perf_session *session,
1520                                       union perf_event *event)
1521 {
1522         struct perf_record_auxtrace_error *e = &event->auxtrace_error;
1523
1524         if (e->type < PERF_AUXTRACE_ERROR_MAX)
1525                 session->evlist->stats.nr_auxtrace_errors[e->type] += 1;
1526 }
1527
1528 void events_stats__auxtrace_error_warn(const struct events_stats *stats)
1529 {
1530         int i;
1531
1532         for (i = 0; i < PERF_AUXTRACE_ERROR_MAX; i++) {
1533                 if (!stats->nr_auxtrace_errors[i])
1534                         continue;
1535                 ui__warning("%u %s errors\n",
1536                             stats->nr_auxtrace_errors[i],
1537                             auxtrace_error_name(i));
1538         }
1539 }
1540
1541 int perf_event__process_auxtrace_error(struct perf_session *session,
1542                                        union perf_event *event)
1543 {
1544         if (auxtrace__dont_decode(session))
1545                 return 0;
1546
1547         perf_event__fprintf_auxtrace_error(event, stdout);
1548         return 0;
1549 }
1550
1551 static int __auxtrace_mmap__read(struct mmap *map,
1552                                  struct auxtrace_record *itr,
1553                                  struct perf_tool *tool, process_auxtrace_t fn,
1554                                  bool snapshot, size_t snapshot_size)
1555 {
1556         struct auxtrace_mmap *mm = &map->auxtrace_mmap;
1557         u64 head, old = mm->prev, offset, ref;
1558         unsigned char *data = mm->base;
1559         size_t size, head_off, old_off, len1, len2, padding;
1560         union perf_event ev;
1561         void *data1, *data2;
1562
1563         if (snapshot) {
1564                 head = auxtrace_mmap__read_snapshot_head(mm);
1565                 if (auxtrace_record__find_snapshot(itr, mm->idx, mm, data,
1566                                                    &head, &old))
1567                         return -1;
1568         } else {
1569                 head = auxtrace_mmap__read_head(mm);
1570         }
1571
1572         if (old == head)
1573                 return 0;
1574
1575         pr_debug3("auxtrace idx %d old %#"PRIx64" head %#"PRIx64" diff %#"PRIx64"\n",
1576                   mm->idx, old, head, head - old);
1577
1578         if (mm->mask) {
1579                 head_off = head & mm->mask;
1580                 old_off = old & mm->mask;
1581         } else {
1582                 head_off = head % mm->len;
1583                 old_off = old % mm->len;
1584         }
1585
1586         if (head_off > old_off)
1587                 size = head_off - old_off;
1588         else
1589                 size = mm->len - (old_off - head_off);
1590
1591         if (snapshot && size > snapshot_size)
1592                 size = snapshot_size;
1593
1594         ref = auxtrace_record__reference(itr);
1595
1596         if (head > old || size <= head || mm->mask) {
1597                 offset = head - size;
1598         } else {
1599                 /*
1600                  * When the buffer size is not a power of 2, 'head' wraps at the
1601                  * highest multiple of the buffer size, so we have to subtract
1602                  * the remainder here.
1603                  */
1604                 u64 rem = (0ULL - mm->len) % mm->len;
1605
1606                 offset = head - size - rem;
1607         }
1608
1609         if (size > head_off) {
1610                 len1 = size - head_off;
1611                 data1 = &data[mm->len - len1];
1612                 len2 = head_off;
1613                 data2 = &data[0];
1614         } else {
1615                 len1 = size;
1616                 data1 = &data[head_off - len1];
1617                 len2 = 0;
1618                 data2 = NULL;
1619         }
1620
1621         if (itr->alignment) {
1622                 unsigned int unwanted = len1 % itr->alignment;
1623
1624                 len1 -= unwanted;
1625                 size -= unwanted;
1626         }
1627
1628         /* padding must be written by fn() e.g. record__process_auxtrace() */
1629         padding = size & (PERF_AUXTRACE_RECORD_ALIGNMENT - 1);
1630         if (padding)
1631                 padding = PERF_AUXTRACE_RECORD_ALIGNMENT - padding;
1632
1633         memset(&ev, 0, sizeof(ev));
1634         ev.auxtrace.header.type = PERF_RECORD_AUXTRACE;
1635         ev.auxtrace.header.size = sizeof(ev.auxtrace);
1636         ev.auxtrace.size = size + padding;
1637         ev.auxtrace.offset = offset;
1638         ev.auxtrace.reference = ref;
1639         ev.auxtrace.idx = mm->idx;
1640         ev.auxtrace.tid = mm->tid;
1641         ev.auxtrace.cpu = mm->cpu;
1642
1643         if (fn(tool, map, &ev, data1, len1, data2, len2))
1644                 return -1;
1645
1646         mm->prev = head;
1647
1648         if (!snapshot) {
1649                 auxtrace_mmap__write_tail(mm, head);
1650                 if (itr->read_finish) {
1651                         int err;
1652
1653                         err = itr->read_finish(itr, mm->idx);
1654                         if (err < 0)
1655                                 return err;
1656                 }
1657         }
1658
1659         return 1;
1660 }
1661
1662 int auxtrace_mmap__read(struct mmap *map, struct auxtrace_record *itr,
1663                         struct perf_tool *tool, process_auxtrace_t fn)
1664 {
1665         return __auxtrace_mmap__read(map, itr, tool, fn, false, 0);
1666 }
1667
1668 int auxtrace_mmap__read_snapshot(struct mmap *map,
1669                                  struct auxtrace_record *itr,
1670                                  struct perf_tool *tool, process_auxtrace_t fn,
1671                                  size_t snapshot_size)
1672 {
1673         return __auxtrace_mmap__read(map, itr, tool, fn, true, snapshot_size);
1674 }
1675
1676 /**
1677  * struct auxtrace_cache - hash table to implement a cache
1678  * @hashtable: the hashtable
1679  * @sz: hashtable size (number of hlists)
1680  * @entry_size: size of an entry
1681  * @limit: limit the number of entries to this maximum, when reached the cache
1682  *         is dropped and caching begins again with an empty cache
1683  * @cnt: current number of entries
1684  * @bits: hashtable size (@sz = 2^@bits)
1685  */
1686 struct auxtrace_cache {
1687         struct hlist_head *hashtable;
1688         size_t sz;
1689         size_t entry_size;
1690         size_t limit;
1691         size_t cnt;
1692         unsigned int bits;
1693 };
1694
1695 struct auxtrace_cache *auxtrace_cache__new(unsigned int bits, size_t entry_size,
1696                                            unsigned int limit_percent)
1697 {
1698         struct auxtrace_cache *c;
1699         struct hlist_head *ht;
1700         size_t sz, i;
1701
1702         c = zalloc(sizeof(struct auxtrace_cache));
1703         if (!c)
1704                 return NULL;
1705
1706         sz = 1UL << bits;
1707
1708         ht = calloc(sz, sizeof(struct hlist_head));
1709         if (!ht)
1710                 goto out_free;
1711
1712         for (i = 0; i < sz; i++)
1713                 INIT_HLIST_HEAD(&ht[i]);
1714
1715         c->hashtable = ht;
1716         c->sz = sz;
1717         c->entry_size = entry_size;
1718         c->limit = (c->sz * limit_percent) / 100;
1719         c->bits = bits;
1720
1721         return c;
1722
1723 out_free:
1724         free(c);
1725         return NULL;
1726 }
1727
1728 static void auxtrace_cache__drop(struct auxtrace_cache *c)
1729 {
1730         struct auxtrace_cache_entry *entry;
1731         struct hlist_node *tmp;
1732         size_t i;
1733
1734         if (!c)
1735                 return;
1736
1737         for (i = 0; i < c->sz; i++) {
1738                 hlist_for_each_entry_safe(entry, tmp, &c->hashtable[i], hash) {
1739                         hlist_del(&entry->hash);
1740                         auxtrace_cache__free_entry(c, entry);
1741                 }
1742         }
1743
1744         c->cnt = 0;
1745 }
1746
1747 void auxtrace_cache__free(struct auxtrace_cache *c)
1748 {
1749         if (!c)
1750                 return;
1751
1752         auxtrace_cache__drop(c);
1753         zfree(&c->hashtable);
1754         free(c);
1755 }
1756
1757 void *auxtrace_cache__alloc_entry(struct auxtrace_cache *c)
1758 {
1759         return malloc(c->entry_size);
1760 }
1761
1762 void auxtrace_cache__free_entry(struct auxtrace_cache *c __maybe_unused,
1763                                 void *entry)
1764 {
1765         free(entry);
1766 }
1767
1768 int auxtrace_cache__add(struct auxtrace_cache *c, u32 key,
1769                         struct auxtrace_cache_entry *entry)
1770 {
1771         if (c->limit && ++c->cnt > c->limit)
1772                 auxtrace_cache__drop(c);
1773
1774         entry->key = key;
1775         hlist_add_head(&entry->hash, &c->hashtable[hash_32(key, c->bits)]);
1776
1777         return 0;
1778 }
1779
1780 static struct auxtrace_cache_entry *auxtrace_cache__rm(struct auxtrace_cache *c,
1781                                                        u32 key)
1782 {
1783         struct auxtrace_cache_entry *entry;
1784         struct hlist_head *hlist;
1785         struct hlist_node *n;
1786
1787         if (!c)
1788                 return NULL;
1789
1790         hlist = &c->hashtable[hash_32(key, c->bits)];
1791         hlist_for_each_entry_safe(entry, n, hlist, hash) {
1792                 if (entry->key == key) {
1793                         hlist_del(&entry->hash);
1794                         return entry;
1795                 }
1796         }
1797
1798         return NULL;
1799 }
1800
1801 void auxtrace_cache__remove(struct auxtrace_cache *c, u32 key)
1802 {
1803         struct auxtrace_cache_entry *entry = auxtrace_cache__rm(c, key);
1804
1805         auxtrace_cache__free_entry(c, entry);
1806 }
1807
1808 void *auxtrace_cache__lookup(struct auxtrace_cache *c, u32 key)
1809 {
1810         struct auxtrace_cache_entry *entry;
1811         struct hlist_head *hlist;
1812
1813         if (!c)
1814                 return NULL;
1815
1816         hlist = &c->hashtable[hash_32(key, c->bits)];
1817         hlist_for_each_entry(entry, hlist, hash) {
1818                 if (entry->key == key)
1819                         return entry;
1820         }
1821
1822         return NULL;
1823 }
1824
1825 static void addr_filter__free_str(struct addr_filter *filt)
1826 {
1827         zfree(&filt->str);
1828         filt->action   = NULL;
1829         filt->sym_from = NULL;
1830         filt->sym_to   = NULL;
1831         filt->filename = NULL;
1832 }
1833
1834 static struct addr_filter *addr_filter__new(void)
1835 {
1836         struct addr_filter *filt = zalloc(sizeof(*filt));
1837
1838         if (filt)
1839                 INIT_LIST_HEAD(&filt->list);
1840
1841         return filt;
1842 }
1843
1844 static void addr_filter__free(struct addr_filter *filt)
1845 {
1846         if (filt)
1847                 addr_filter__free_str(filt);
1848         free(filt);
1849 }
1850
1851 static void addr_filters__add(struct addr_filters *filts,
1852                               struct addr_filter *filt)
1853 {
1854         list_add_tail(&filt->list, &filts->head);
1855         filts->cnt += 1;
1856 }
1857
1858 static void addr_filters__del(struct addr_filters *filts,
1859                               struct addr_filter *filt)
1860 {
1861         list_del_init(&filt->list);
1862         filts->cnt -= 1;
1863 }
1864
1865 void addr_filters__init(struct addr_filters *filts)
1866 {
1867         INIT_LIST_HEAD(&filts->head);
1868         filts->cnt = 0;
1869 }
1870
1871 void addr_filters__exit(struct addr_filters *filts)
1872 {
1873         struct addr_filter *filt, *n;
1874
1875         list_for_each_entry_safe(filt, n, &filts->head, list) {
1876                 addr_filters__del(filts, filt);
1877                 addr_filter__free(filt);
1878         }
1879 }
1880
1881 static int parse_num_or_str(char **inp, u64 *num, const char **str,
1882                             const char *str_delim)
1883 {
1884         *inp += strspn(*inp, " ");
1885
1886         if (isdigit(**inp)) {
1887                 char *endptr;
1888
1889                 if (!num)
1890                         return -EINVAL;
1891                 errno = 0;
1892                 *num = strtoull(*inp, &endptr, 0);
1893                 if (errno)
1894                         return -errno;
1895                 if (endptr == *inp)
1896                         return -EINVAL;
1897                 *inp = endptr;
1898         } else {
1899                 size_t n;
1900
1901                 if (!str)
1902                         return -EINVAL;
1903                 *inp += strspn(*inp, " ");
1904                 *str = *inp;
1905                 n = strcspn(*inp, str_delim);
1906                 if (!n)
1907                         return -EINVAL;
1908                 *inp += n;
1909                 if (**inp) {
1910                         **inp = '\0';
1911                         *inp += 1;
1912                 }
1913         }
1914         return 0;
1915 }
1916
1917 static int parse_action(struct addr_filter *filt)
1918 {
1919         if (!strcmp(filt->action, "filter")) {
1920                 filt->start = true;
1921                 filt->range = true;
1922         } else if (!strcmp(filt->action, "start")) {
1923                 filt->start = true;
1924         } else if (!strcmp(filt->action, "stop")) {
1925                 filt->start = false;
1926         } else if (!strcmp(filt->action, "tracestop")) {
1927                 filt->start = false;
1928                 filt->range = true;
1929                 filt->action += 5; /* Change 'tracestop' to 'stop' */
1930         } else {
1931                 return -EINVAL;
1932         }
1933         return 0;
1934 }
1935
1936 static int parse_sym_idx(char **inp, int *idx)
1937 {
1938         *idx = -1;
1939
1940         *inp += strspn(*inp, " ");
1941
1942         if (**inp != '#')
1943                 return 0;
1944
1945         *inp += 1;
1946
1947         if (**inp == 'g' || **inp == 'G') {
1948                 *inp += 1;
1949                 *idx = 0;
1950         } else {
1951                 unsigned long num;
1952                 char *endptr;
1953
1954                 errno = 0;
1955                 num = strtoul(*inp, &endptr, 0);
1956                 if (errno)
1957                         return -errno;
1958                 if (endptr == *inp || num > INT_MAX)
1959                         return -EINVAL;
1960                 *inp = endptr;
1961                 *idx = num;
1962         }
1963
1964         return 0;
1965 }
1966
1967 static int parse_addr_size(char **inp, u64 *num, const char **str, int *idx)
1968 {
1969         int err = parse_num_or_str(inp, num, str, " ");
1970
1971         if (!err && *str)
1972                 err = parse_sym_idx(inp, idx);
1973
1974         return err;
1975 }
1976
1977 static int parse_one_filter(struct addr_filter *filt, const char **filter_inp)
1978 {
1979         char *fstr;
1980         int err;
1981
1982         filt->str = fstr = strdup(*filter_inp);
1983         if (!fstr)
1984                 return -ENOMEM;
1985
1986         err = parse_num_or_str(&fstr, NULL, &filt->action, " ");
1987         if (err)
1988                 goto out_err;
1989
1990         err = parse_action(filt);
1991         if (err)
1992                 goto out_err;
1993
1994         err = parse_addr_size(&fstr, &filt->addr, &filt->sym_from,
1995                               &filt->sym_from_idx);
1996         if (err)
1997                 goto out_err;
1998
1999         fstr += strspn(fstr, " ");
2000
2001         if (*fstr == '/') {
2002                 fstr += 1;
2003                 err = parse_addr_size(&fstr, &filt->size, &filt->sym_to,
2004                                       &filt->sym_to_idx);
2005                 if (err)
2006                         goto out_err;
2007                 filt->range = true;
2008         }
2009
2010         fstr += strspn(fstr, " ");
2011
2012         if (*fstr == '@') {
2013                 fstr += 1;
2014                 err = parse_num_or_str(&fstr, NULL, &filt->filename, " ,");
2015                 if (err)
2016                         goto out_err;
2017         }
2018
2019         fstr += strspn(fstr, " ,");
2020
2021         *filter_inp += fstr - filt->str;
2022
2023         return 0;
2024
2025 out_err:
2026         addr_filter__free_str(filt);
2027
2028         return err;
2029 }
2030
2031 int addr_filters__parse_bare_filter(struct addr_filters *filts,
2032                                     const char *filter)
2033 {
2034         struct addr_filter *filt;
2035         const char *fstr = filter;
2036         int err;
2037
2038         while (*fstr) {
2039                 filt = addr_filter__new();
2040                 err = parse_one_filter(filt, &fstr);
2041                 if (err) {
2042                         addr_filter__free(filt);
2043                         addr_filters__exit(filts);
2044                         return err;
2045                 }
2046                 addr_filters__add(filts, filt);
2047         }
2048
2049         return 0;
2050 }
2051
2052 struct sym_args {
2053         const char      *name;
2054         u64             start;
2055         u64             size;
2056         int             idx;
2057         int             cnt;
2058         bool            started;
2059         bool            global;
2060         bool            selected;
2061         bool            duplicate;
2062         bool            near;
2063 };
2064
2065 static bool kern_sym_match(struct sym_args *args, const char *name, char type)
2066 {
2067         /* A function with the same name, and global or the n'th found or any */
2068         return kallsyms__is_function(type) &&
2069                !strcmp(name, args->name) &&
2070                ((args->global && isupper(type)) ||
2071                 (args->selected && ++(args->cnt) == args->idx) ||
2072                 (!args->global && !args->selected));
2073 }
2074
2075 static int find_kern_sym_cb(void *arg, const char *name, char type, u64 start)
2076 {
2077         struct sym_args *args = arg;
2078
2079         if (args->started) {
2080                 if (!args->size)
2081                         args->size = start - args->start;
2082                 if (args->selected) {
2083                         if (args->size)
2084                                 return 1;
2085                 } else if (kern_sym_match(args, name, type)) {
2086                         args->duplicate = true;
2087                         return 1;
2088                 }
2089         } else if (kern_sym_match(args, name, type)) {
2090                 args->started = true;
2091                 args->start = start;
2092         }
2093
2094         return 0;
2095 }
2096
2097 static int print_kern_sym_cb(void *arg, const char *name, char type, u64 start)
2098 {
2099         struct sym_args *args = arg;
2100
2101         if (kern_sym_match(args, name, type)) {
2102                 pr_err("#%d\t0x%"PRIx64"\t%c\t%s\n",
2103                        ++args->cnt, start, type, name);
2104                 args->near = true;
2105         } else if (args->near) {
2106                 args->near = false;
2107                 pr_err("\t\twhich is near\t\t%s\n", name);
2108         }
2109
2110         return 0;
2111 }
2112
2113 static int sym_not_found_error(const char *sym_name, int idx)
2114 {
2115         if (idx > 0) {
2116                 pr_err("N'th occurrence (N=%d) of symbol '%s' not found.\n",
2117                        idx, sym_name);
2118         } else if (!idx) {
2119                 pr_err("Global symbol '%s' not found.\n", sym_name);
2120         } else {
2121                 pr_err("Symbol '%s' not found.\n", sym_name);
2122         }
2123         pr_err("Note that symbols must be functions.\n");
2124
2125         return -EINVAL;
2126 }
2127
2128 static int find_kern_sym(const char *sym_name, u64 *start, u64 *size, int idx)
2129 {
2130         struct sym_args args = {
2131                 .name = sym_name,
2132                 .idx = idx,
2133                 .global = !idx,
2134                 .selected = idx > 0,
2135         };
2136         int err;
2137
2138         *start = 0;
2139         *size = 0;
2140
2141         err = kallsyms__parse("/proc/kallsyms", &args, find_kern_sym_cb);
2142         if (err < 0) {
2143                 pr_err("Failed to parse /proc/kallsyms\n");
2144                 return err;
2145         }
2146
2147         if (args.duplicate) {
2148                 pr_err("Multiple kernel symbols with name '%s'\n", sym_name);
2149                 args.cnt = 0;
2150                 kallsyms__parse("/proc/kallsyms", &args, print_kern_sym_cb);
2151                 pr_err("Disambiguate symbol name by inserting #n after the name e.g. %s #2\n",
2152                        sym_name);
2153                 pr_err("Or select a global symbol by inserting #0 or #g or #G\n");
2154                 return -EINVAL;
2155         }
2156
2157         if (!args.started) {
2158                 pr_err("Kernel symbol lookup: ");
2159                 return sym_not_found_error(sym_name, idx);
2160         }
2161
2162         *start = args.start;
2163         *size = args.size;
2164
2165         return 0;
2166 }
2167
2168 static int find_entire_kern_cb(void *arg, const char *name __maybe_unused,
2169                                char type, u64 start)
2170 {
2171         struct sym_args *args = arg;
2172
2173         if (!kallsyms__is_function(type))
2174                 return 0;
2175
2176         if (!args->started) {
2177                 args->started = true;
2178                 args->start = start;
2179         }
2180         /* Don't know exactly where the kernel ends, so we add a page */
2181         args->size = round_up(start, page_size) + page_size - args->start;
2182
2183         return 0;
2184 }
2185
2186 static int addr_filter__entire_kernel(struct addr_filter *filt)
2187 {
2188         struct sym_args args = { .started = false };
2189         int err;
2190
2191         err = kallsyms__parse("/proc/kallsyms", &args, find_entire_kern_cb);
2192         if (err < 0 || !args.started) {
2193                 pr_err("Failed to parse /proc/kallsyms\n");
2194                 return err;
2195         }
2196
2197         filt->addr = args.start;
2198         filt->size = args.size;
2199
2200         return 0;
2201 }
2202
2203 static int check_end_after_start(struct addr_filter *filt, u64 start, u64 size)
2204 {
2205         if (start + size >= filt->addr)
2206                 return 0;
2207
2208         if (filt->sym_from) {
2209                 pr_err("Symbol '%s' (0x%"PRIx64") comes before '%s' (0x%"PRIx64")\n",
2210                        filt->sym_to, start, filt->sym_from, filt->addr);
2211         } else {
2212                 pr_err("Symbol '%s' (0x%"PRIx64") comes before address 0x%"PRIx64")\n",
2213                        filt->sym_to, start, filt->addr);
2214         }
2215
2216         return -EINVAL;
2217 }
2218
2219 static int addr_filter__resolve_kernel_syms(struct addr_filter *filt)
2220 {
2221         bool no_size = false;
2222         u64 start, size;
2223         int err;
2224
2225         if (symbol_conf.kptr_restrict) {
2226                 pr_err("Kernel addresses are restricted. Unable to resolve kernel symbols.\n");
2227                 return -EINVAL;
2228         }
2229
2230         if (filt->sym_from && !strcmp(filt->sym_from, "*"))
2231                 return addr_filter__entire_kernel(filt);
2232
2233         if (filt->sym_from) {
2234                 err = find_kern_sym(filt->sym_from, &start, &size,
2235                                     filt->sym_from_idx);
2236                 if (err)
2237                         return err;
2238                 filt->addr = start;
2239                 if (filt->range && !filt->size && !filt->sym_to) {
2240                         filt->size = size;
2241                         no_size = !size;
2242                 }
2243         }
2244
2245         if (filt->sym_to) {
2246                 err = find_kern_sym(filt->sym_to, &start, &size,
2247                                     filt->sym_to_idx);
2248                 if (err)
2249                         return err;
2250
2251                 err = check_end_after_start(filt, start, size);
2252                 if (err)
2253                         return err;
2254                 filt->size = start + size - filt->addr;
2255                 no_size = !size;
2256         }
2257
2258         /* The very last symbol in kallsyms does not imply a particular size */
2259         if (no_size) {
2260                 pr_err("Cannot determine size of symbol '%s'\n",
2261                        filt->sym_to ? filt->sym_to : filt->sym_from);
2262                 return -EINVAL;
2263         }
2264
2265         return 0;
2266 }
2267
2268 static struct dso *load_dso(const char *name)
2269 {
2270         struct map *map;
2271         struct dso *dso;
2272
2273         map = dso__new_map(name);
2274         if (!map)
2275                 return NULL;
2276
2277         if (map__load(map) < 0)
2278                 pr_err("File '%s' not found or has no symbols.\n", name);
2279
2280         dso = dso__get(map->dso);
2281
2282         map__put(map);
2283
2284         return dso;
2285 }
2286
2287 static bool dso_sym_match(struct symbol *sym, const char *name, int *cnt,
2288                           int idx)
2289 {
2290         /* Same name, and global or the n'th found or any */
2291         return !arch__compare_symbol_names(name, sym->name) &&
2292                ((!idx && sym->binding == STB_GLOBAL) ||
2293                 (idx > 0 && ++*cnt == idx) ||
2294                 idx < 0);
2295 }
2296
2297 static void print_duplicate_syms(struct dso *dso, const char *sym_name)
2298 {
2299         struct symbol *sym;
2300         bool near = false;
2301         int cnt = 0;
2302
2303         pr_err("Multiple symbols with name '%s'\n", sym_name);
2304
2305         sym = dso__first_symbol(dso);
2306         while (sym) {
2307                 if (dso_sym_match(sym, sym_name, &cnt, -1)) {
2308                         pr_err("#%d\t0x%"PRIx64"\t%c\t%s\n",
2309                                ++cnt, sym->start,
2310                                sym->binding == STB_GLOBAL ? 'g' :
2311                                sym->binding == STB_LOCAL  ? 'l' : 'w',
2312                                sym->name);
2313                         near = true;
2314                 } else if (near) {
2315                         near = false;
2316                         pr_err("\t\twhich is near\t\t%s\n", sym->name);
2317                 }
2318                 sym = dso__next_symbol(sym);
2319         }
2320
2321         pr_err("Disambiguate symbol name by inserting #n after the name e.g. %s #2\n",
2322                sym_name);
2323         pr_err("Or select a global symbol by inserting #0 or #g or #G\n");
2324 }
2325
2326 static int find_dso_sym(struct dso *dso, const char *sym_name, u64 *start,
2327                         u64 *size, int idx)
2328 {
2329         struct symbol *sym;
2330         int cnt = 0;
2331
2332         *start = 0;
2333         *size = 0;
2334
2335         sym = dso__first_symbol(dso);
2336         while (sym) {
2337                 if (*start) {
2338                         if (!*size)
2339                                 *size = sym->start - *start;
2340                         if (idx > 0) {
2341                                 if (*size)
2342                                         return 1;
2343                         } else if (dso_sym_match(sym, sym_name, &cnt, idx)) {
2344                                 print_duplicate_syms(dso, sym_name);
2345                                 return -EINVAL;
2346                         }
2347                 } else if (dso_sym_match(sym, sym_name, &cnt, idx)) {
2348                         *start = sym->start;
2349                         *size = sym->end - sym->start;
2350                 }
2351                 sym = dso__next_symbol(sym);
2352         }
2353
2354         if (!*start)
2355                 return sym_not_found_error(sym_name, idx);
2356
2357         return 0;
2358 }
2359
2360 static int addr_filter__entire_dso(struct addr_filter *filt, struct dso *dso)
2361 {
2362         if (dso__data_file_size(dso, NULL)) {
2363                 pr_err("Failed to determine filter for %s\nCannot determine file size.\n",
2364                        filt->filename);
2365                 return -EINVAL;
2366         }
2367
2368         filt->addr = 0;
2369         filt->size = dso->data.file_size;
2370
2371         return 0;
2372 }
2373
2374 static int addr_filter__resolve_syms(struct addr_filter *filt)
2375 {
2376         u64 start, size;
2377         struct dso *dso;
2378         int err = 0;
2379
2380         if (!filt->sym_from && !filt->sym_to)
2381                 return 0;
2382
2383         if (!filt->filename)
2384                 return addr_filter__resolve_kernel_syms(filt);
2385
2386         dso = load_dso(filt->filename);
2387         if (!dso) {
2388                 pr_err("Failed to load symbols from: %s\n", filt->filename);
2389                 return -EINVAL;
2390         }
2391
2392         if (filt->sym_from && !strcmp(filt->sym_from, "*")) {
2393                 err = addr_filter__entire_dso(filt, dso);
2394                 goto put_dso;
2395         }
2396
2397         if (filt->sym_from) {
2398                 err = find_dso_sym(dso, filt->sym_from, &start, &size,
2399                                    filt->sym_from_idx);
2400                 if (err)
2401                         goto put_dso;
2402                 filt->addr = start;
2403                 if (filt->range && !filt->size && !filt->sym_to)
2404                         filt->size = size;
2405         }
2406
2407         if (filt->sym_to) {
2408                 err = find_dso_sym(dso, filt->sym_to, &start, &size,
2409                                    filt->sym_to_idx);
2410                 if (err)
2411                         goto put_dso;
2412
2413                 err = check_end_after_start(filt, start, size);
2414                 if (err)
2415                         return err;
2416
2417                 filt->size = start + size - filt->addr;
2418         }
2419
2420 put_dso:
2421         dso__put(dso);
2422
2423         return err;
2424 }
2425
2426 static char *addr_filter__to_str(struct addr_filter *filt)
2427 {
2428         char filename_buf[PATH_MAX];
2429         const char *at = "";
2430         const char *fn = "";
2431         char *filter;
2432         int err;
2433
2434         if (filt->filename) {
2435                 at = "@";
2436                 fn = realpath(filt->filename, filename_buf);
2437                 if (!fn)
2438                         return NULL;
2439         }
2440
2441         if (filt->range) {
2442                 err = asprintf(&filter, "%s 0x%"PRIx64"/0x%"PRIx64"%s%s",
2443                                filt->action, filt->addr, filt->size, at, fn);
2444         } else {
2445                 err = asprintf(&filter, "%s 0x%"PRIx64"%s%s",
2446                                filt->action, filt->addr, at, fn);
2447         }
2448
2449         return err < 0 ? NULL : filter;
2450 }
2451
2452 static int parse_addr_filter(struct evsel *evsel, const char *filter,
2453                              int max_nr)
2454 {
2455         struct addr_filters filts;
2456         struct addr_filter *filt;
2457         int err;
2458
2459         addr_filters__init(&filts);
2460
2461         err = addr_filters__parse_bare_filter(&filts, filter);
2462         if (err)
2463                 goto out_exit;
2464
2465         if (filts.cnt > max_nr) {
2466                 pr_err("Error: number of address filters (%d) exceeds maximum (%d)\n",
2467                        filts.cnt, max_nr);
2468                 err = -EINVAL;
2469                 goto out_exit;
2470         }
2471
2472         list_for_each_entry(filt, &filts.head, list) {
2473                 char *new_filter;
2474
2475                 err = addr_filter__resolve_syms(filt);
2476                 if (err)
2477                         goto out_exit;
2478
2479                 new_filter = addr_filter__to_str(filt);
2480                 if (!new_filter) {
2481                         err = -ENOMEM;
2482                         goto out_exit;
2483                 }
2484
2485                 if (perf_evsel__append_addr_filter(evsel, new_filter)) {
2486                         err = -ENOMEM;
2487                         goto out_exit;
2488                 }
2489         }
2490
2491 out_exit:
2492         addr_filters__exit(&filts);
2493
2494         if (err) {
2495                 pr_err("Failed to parse address filter: '%s'\n", filter);
2496                 pr_err("Filter format is: filter|start|stop|tracestop <start symbol or address> [/ <end symbol or size>] [@<file name>]\n");
2497                 pr_err("Where multiple filters are separated by space or comma.\n");
2498         }
2499
2500         return err;
2501 }
2502
2503 static int perf_evsel__nr_addr_filter(struct evsel *evsel)
2504 {
2505         struct perf_pmu *pmu = perf_evsel__find_pmu(evsel);
2506         int nr_addr_filters = 0;
2507
2508         if (!pmu)
2509                 return 0;
2510
2511         perf_pmu__scan_file(pmu, "nr_addr_filters", "%d", &nr_addr_filters);
2512
2513         return nr_addr_filters;
2514 }
2515
2516 int auxtrace_parse_filters(struct evlist *evlist)
2517 {
2518         struct evsel *evsel;
2519         char *filter;
2520         int err, max_nr;
2521
2522         evlist__for_each_entry(evlist, evsel) {
2523                 filter = evsel->filter;
2524                 max_nr = perf_evsel__nr_addr_filter(evsel);
2525                 if (!filter || !max_nr)
2526                         continue;
2527                 evsel->filter = NULL;
2528                 err = parse_addr_filter(evsel, filter, max_nr);
2529                 free(filter);
2530                 if (err)
2531                         return err;
2532                 pr_debug("Address filter: %s\n", evsel->filter);
2533         }
2534
2535         return 0;
2536 }
2537
2538 int auxtrace__process_event(struct perf_session *session, union perf_event *event,
2539                             struct perf_sample *sample, struct perf_tool *tool)
2540 {
2541         if (!session->auxtrace)
2542                 return 0;
2543
2544         return session->auxtrace->process_event(session, event, sample, tool);
2545 }
2546
2547 void auxtrace__dump_auxtrace_sample(struct perf_session *session,
2548                                     struct perf_sample *sample)
2549 {
2550         if (!session->auxtrace || !session->auxtrace->dump_auxtrace_sample ||
2551             auxtrace__dont_decode(session))
2552                 return;
2553
2554         session->auxtrace->dump_auxtrace_sample(session, sample);
2555 }
2556
2557 int auxtrace__flush_events(struct perf_session *session, struct perf_tool *tool)
2558 {
2559         if (!session->auxtrace)
2560                 return 0;
2561
2562         return session->auxtrace->flush_events(session, tool);
2563 }
2564
2565 void auxtrace__free_events(struct perf_session *session)
2566 {
2567         if (!session->auxtrace)
2568                 return;
2569
2570         return session->auxtrace->free_events(session);
2571 }
2572
2573 void auxtrace__free(struct perf_session *session)
2574 {
2575         if (!session->auxtrace)
2576                 return;
2577
2578         return session->auxtrace->free(session);
2579 }