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/perf_api_probe.h"
  37 #include "util/synthetic-events.h"
  38 #include "thread_map.h"
  39 #include "asm/bug.h"
  40 #include "auxtrace.h"
  41
  42 #include <linux/hash.h>
  43
  44 #include "event.h"
  45 #include "record.h"
  46 #include "session.h"
  47 #include "debug.h"
  48 #include <subcmd/parse-options.h>
  49
  50 #include "cs-etm.h"
  51 #include "intel-pt.h"
  52 #include "intel-bts.h"
  53 #include "arm-spe.h"
  54 #include "s390-cpumsf.h"
  55 #include "util/mmap.h"
  56
  57 #include <linux/ctype.h>
  58 #include "symbol/kallsyms.h"
  59 #include <internal/lib.h>
  60
  61 /*
  62  * Make a group from 'leader' to 'last', requiring that the events were not
  63  * already grouped to a different leader.
  64  */
  65 static int perf_evlist__regroup(struct evlist *evlist,
  66                                 struct evsel *leader,
  67                                 struct evsel *last)
  68 {
  69         struct evsel *evsel;
  70         bool grp;
  71
  72         if (!evsel__is_group_leader(leader))
  73                 return -EINVAL;
  74
  75         grp = false;
  76         evlist__for_each_entry(evlist, evsel) {
  77                 if (grp) {
  78                         if (!(evsel->leader == leader ||
  79                              (evsel->leader == evsel &&
  80                               evsel->core.nr_members <= 1)))
  81                                 return -EINVAL;
  82                 } else if (evsel == leader) {
  83                         grp = true;
  84                 }
  85                 if (evsel == last)
  86                         break;
  87         }
  88
  89         grp = false;
  90         evlist__for_each_entry(evlist, evsel) {
  91                 if (grp) {
  92                         if (evsel->leader != leader) {
  93                                 evsel->leader = leader;
  94                                 if (leader->core.nr_members < 1)
  95                                         leader->core.nr_members = 1;
  96                                 leader->core.nr_members += 1;
  97                         }
  98                 } else if (evsel == leader) {
  99                         grp = true;
 100                 }
 101                 if (evsel == last)
 102                         break;
 103         }
 104
 105         return 0;
 106 }
 107
 108 static bool auxtrace__dont_decode(struct perf_session *session)
 109 {
 110         return !session->itrace_synth_opts ||
 111                session->itrace_synth_opts->dont_decode;
 112 }
 113
 114 int auxtrace_mmap__mmap(struct auxtrace_mmap *mm,
 115                         struct auxtrace_mmap_params *mp,
 116                         void *userpg, int fd)
 117 {
 118         struct perf_event_mmap_page *pc = userpg;
 119
 120         WARN_ONCE(mm->base, "Uninitialized auxtrace_mmap\n");
 121
 122         mm->userpg = userpg;
 123         mm->mask = mp->mask;
 124         mm->len = mp->len;
 125         mm->prev = 0;
 126         mm->idx = mp->idx;
 127         mm->tid = mp->tid;
 128         mm->cpu = mp->cpu;
 129
 130         if (!mp->len) {
 131                 mm->base = NULL;
 132                 return 0;
 133         }
 134
 135 #if BITS_PER_LONG != 64 && !defined(HAVE_SYNC_COMPARE_AND_SWAP_SUPPORT)
 136         pr_err("Cannot use AUX area tracing mmaps\n");
 137         return -1;
 138 #endif
 139
 140         pc->aux_offset = mp->offset;
 141         pc->aux_size = mp->len;
 142
 143         mm->base = mmap(NULL, mp->len, mp->prot, MAP_SHARED, fd, mp->offset);
 144         if (mm->base == MAP_FAILED) {
 145                 pr_debug2("failed to mmap AUX area\n");
 146                 mm->base = NULL;
 147                 return -1;
 148         }
 149
 150         return 0;
 151 }
 152
 153 void auxtrace_mmap__munmap(struct auxtrace_mmap *mm)
 154 {
 155         if (mm->base) {
 156                 munmap(mm->base, mm->len);
 157                 mm->base = NULL;
 158         }
 159 }
 160
 161 void auxtrace_mmap_params__init(struct auxtrace_mmap_params *mp,
 162                                 off_t auxtrace_offset,
 163                                 unsigned int auxtrace_pages,
 164                                 bool auxtrace_overwrite)
 165 {
 166         if (auxtrace_pages) {
 167                 mp->offset = auxtrace_offset;
 168                 mp->len = auxtrace_pages * (size_t)page_size;
 169                 mp->mask = is_power_of_2(mp->len) ? mp->len - 1 : 0;
 170                 mp->prot = PROT_READ | (auxtrace_overwrite ? 0 : PROT_WRITE);
 171                 pr_debug2("AUX area mmap length %zu\n", mp->len);
 172         } else {
 173                 mp->len = 0;
 174         }
 175 }
 176
 177 void auxtrace_mmap_params__set_idx(struct auxtrace_mmap_params *mp,
 178                                    struct evlist *evlist, int idx,
 179                                    bool per_cpu)
 180 {
 181         mp->idx = idx;
 182
 183         if (per_cpu) {
 184                 mp->cpu = evlist->core.cpus->map[idx];
 185                 if (evlist->core.threads)
 186                         mp->tid = perf_thread_map__pid(evlist->core.threads, 0);
 187                 else
 188                         mp->tid = -1;
 189         } else {
 190                 mp->cpu = -1;
 191                 mp->tid = perf_thread_map__pid(evlist->core.threads, idx);
 192         }
 193 }
 194
 195 #define AUXTRACE_INIT_NR_QUEUES 32
 196
 197 static struct auxtrace_queue *auxtrace_alloc_queue_array(unsigned int nr_queues)
 198 {
 199         struct auxtrace_queue *queue_array;
 200         unsigned int max_nr_queues, i;
 201
 202         max_nr_queues = UINT_MAX / sizeof(struct auxtrace_queue);
 203         if (nr_queues > max_nr_queues)
 204                 return NULL;
 205
 206         queue_array = calloc(nr_queues, sizeof(struct auxtrace_queue));
 207         if (!queue_array)
 208                 return NULL;
 209
 210         for (i = 0; i < nr_queues; i++) {
 211                 INIT_LIST_HEAD(&queue_array[i].head);
 212                 queue_array[i].priv = NULL;
 213         }
 214
 215         return queue_array;
 216 }
 217
 218 int auxtrace_queues__init(struct auxtrace_queues *queues)
 219 {
 220         queues->nr_queues = AUXTRACE_INIT_NR_QUEUES;
 221         queues->queue_array = auxtrace_alloc_queue_array(queues->nr_queues);
 222         if (!queues->queue_array)
 223                 return -ENOMEM;
 224         return 0;
 225 }
 226
 227 static int auxtrace_queues__grow(struct auxtrace_queues *queues,
 228                                  unsigned int new_nr_queues)
 229 {
 230         unsigned int nr_queues = queues->nr_queues;
 231         struct auxtrace_queue *queue_array;
 232         unsigned int i;
 233
 234         if (!nr_queues)
 235                 nr_queues = AUXTRACE_INIT_NR_QUEUES;
 236
 237         while (nr_queues && nr_queues < new_nr_queues)
 238                 nr_queues <<= 1;
 239
 240         if (nr_queues < queues->nr_queues || nr_queues < new_nr_queues)
 241                 return -EINVAL;
 242
 243         queue_array = auxtrace_alloc_queue_array(nr_queues);
 244         if (!queue_array)
 245                 return -ENOMEM;
 246
 247         for (i = 0; i < queues->nr_queues; i++) {
 248                 list_splice_tail(&queues->queue_array[i].head,
 249                                  &queue_array[i].head);
 250                 queue_array[i].tid = queues->queue_array[i].tid;
 251                 queue_array[i].cpu = queues->queue_array[i].cpu;
 252                 queue_array[i].set = queues->queue_array[i].set;
 253                 queue_array[i].priv = queues->queue_array[i].priv;
 254         }
 255
 256         queues->nr_queues = nr_queues;
 257         queues->queue_array = queue_array;
 258
 259         return 0;
 260 }
 261
 262 static void *auxtrace_copy_data(u64 size, struct perf_session *session)
 263 {
 264         int fd = perf_data__fd(session->data);
 265         void *p;
 266         ssize_t ret;
 267
 268         if (size > SSIZE_MAX)
 269                 return NULL;
 270
 271         p = malloc(size);
 272         if (!p)
 273                 return NULL;
 274
 275         ret = readn(fd, p, size);
 276         if (ret != (ssize_t)size) {
 277                 free(p);
 278                 return NULL;
 279         }
 280
 281         return p;
 282 }
 283
 284 static int auxtrace_queues__queue_buffer(struct auxtrace_queues *queues,
 285                                          unsigned int idx,
 286                                          struct auxtrace_buffer *buffer)
 287 {
 288         struct auxtrace_queue *queue;
 289         int err;
 290
 291         if (idx >= queues->nr_queues) {
 292                 err = auxtrace_queues__grow(queues, idx + 1);
 293                 if (err)
 294                         return err;
 295         }
 296
 297         queue = &queues->queue_array[idx];
 298
 299         if (!queue->set) {
 300                 queue->set = true;
 301                 queue->tid = buffer->tid;
 302                 queue->cpu = buffer->cpu;
 303         }
 304
 305         buffer->buffer_nr = queues->next_buffer_nr++;
 306
 307         list_add_tail(&buffer->list, &queue->head);
 308
 309         queues->new_data = true;
 310         queues->populated = true;
 311
 312         return 0;
 313 }
 314
 315 /* Limit buffers to 32MiB on 32-bit */
 316 #define BUFFER_LIMIT_FOR_32_BIT (32 * 1024 * 1024)
 317
 318 static int auxtrace_queues__split_buffer(struct auxtrace_queues *queues,
 319                                          unsigned int idx,
 320                                          struct auxtrace_buffer *buffer)
 321 {
 322         u64 sz = buffer->size;
 323         bool consecutive = false;
 324         struct auxtrace_buffer *b;
 325         int err;
 326
 327         while (sz > BUFFER_LIMIT_FOR_32_BIT) {
 328                 b = memdup(buffer, sizeof(struct auxtrace_buffer));
 329                 if (!b)
 330                         return -ENOMEM;
 331                 b->size = BUFFER_LIMIT_FOR_32_BIT;
 332                 b->consecutive = consecutive;
 333                 err = auxtrace_queues__queue_buffer(queues, idx, b);
 334                 if (err) {
 335                         auxtrace_buffer__free(b);
 336                         return err;
 337                 }
 338                 buffer->data_offset += BUFFER_LIMIT_FOR_32_BIT;
 339                 sz -= BUFFER_LIMIT_FOR_32_BIT;
 340                 consecutive = true;
 341         }
 342
 343         buffer->size = sz;
 344         buffer->consecutive = consecutive;
 345
 346         return 0;
 347 }
 348
 349 static bool filter_cpu(struct perf_session *session, int cpu)
 350 {
 351         unsigned long *cpu_bitmap = session->itrace_synth_opts->cpu_bitmap;
 352
 353         return cpu_bitmap && cpu != -1 && !test_bit(cpu, cpu_bitmap);
 354 }
 355
 356 static int auxtrace_queues__add_buffer(struct auxtrace_queues *queues,
 357                                        struct perf_session *session,
 358                                        unsigned int idx,
 359                                        struct auxtrace_buffer *buffer,
 360                                        struct auxtrace_buffer **buffer_ptr)
 361 {
 362         int err = -ENOMEM;
 363
 364         if (filter_cpu(session, buffer->cpu))
 365                 return 0;
 366
 367         buffer = memdup(buffer, sizeof(*buffer));
 368         if (!buffer)
 369                 return -ENOMEM;
 370
 371         if (session->one_mmap) {
 372                 buffer->data = buffer->data_offset - session->one_mmap_offset +
 373                                session->one_mmap_addr;
 374         } else if (perf_data__is_pipe(session->data)) {
 375                 buffer->data = auxtrace_copy_data(buffer->size, session);
 376                 if (!buffer->data)
 377                         goto out_free;
 378                 buffer->data_needs_freeing = true;
 379         } else if (BITS_PER_LONG == 32 &&
 380                    buffer->size > BUFFER_LIMIT_FOR_32_BIT) {
 381                 err = auxtrace_queues__split_buffer(queues, idx, buffer);
 382                 if (err)
 383                         goto out_free;
 384         }
 385
 386         err = auxtrace_queues__queue_buffer(queues, idx, buffer);
 387         if (err)
 388                 goto out_free;
 389
 390         /* FIXME: Doesn't work for split buffer */
 391         if (buffer_ptr)
 392                 *buffer_ptr = buffer;
 393
 394         return 0;
 395
 396 out_free:
 397         auxtrace_buffer__free(buffer);
 398         return err;
 399 }
 400
 401 int auxtrace_queues__add_event(struct auxtrace_queues *queues,
 402                                struct perf_session *session,
 403                                union perf_event *event, off_t data_offset,
 404                                struct auxtrace_buffer **buffer_ptr)
 405 {
 406         struct auxtrace_buffer buffer = {
 407                 .pid = -1,
 408                 .tid = event->auxtrace.tid,
 409                 .cpu = event->auxtrace.cpu,
 410                 .data_offset = data_offset,
 411                 .offset = event->auxtrace.offset,
 412                 .reference = event->auxtrace.reference,
 413                 .size = event->auxtrace.size,
 414         };
 415         unsigned int idx = event->auxtrace.idx;
 416
 417         return auxtrace_queues__add_buffer(queues, session, idx, &buffer,
 418                                            buffer_ptr);
 419 }
 420
 421 static int auxtrace_queues__add_indexed_event(struct auxtrace_queues *queues,
 422                                               struct perf_session *session,
 423                                               off_t file_offset, size_t sz)
 424 {
 425         union perf_event *event;
 426         int err;
 427         char buf[PERF_SAMPLE_MAX_SIZE];
 428
 429         err = perf_session__peek_event(session, file_offset, buf,
 430                                        PERF_SAMPLE_MAX_SIZE, &event, NULL);
 431         if (err)
 432                 return err;
 433
 434         if (event->header.type == PERF_RECORD_AUXTRACE) {
 435                 if (event->header.size < sizeof(struct perf_record_auxtrace) ||
 436                     event->header.size != sz) {
 437                         err = -EINVAL;
 438                         goto out;
 439                 }
 440                 file_offset += event->header.size;
 441                 err = auxtrace_queues__add_event(queues, session, event,
 442                                                  file_offset, NULL);
 443         }
 444 out:
 445         return err;
 446 }
 447
 448 void auxtrace_queues__free(struct auxtrace_queues *queues)
 449 {
 450         unsigned int i;
 451
 452         for (i = 0; i < queues->nr_queues; i++) {
 453                 while (!list_empty(&queues->queue_array[i].head)) {
 454                         struct auxtrace_buffer *buffer;
 455
 456                         buffer = list_entry(queues->queue_array[i].head.next,
 457                                             struct auxtrace_buffer, list);
 458                         list_del_init(&buffer->list);
 459                         auxtrace_buffer__free(buffer);
 460                 }
 461         }
 462
 463         zfree(&queues->queue_array);
 464         queues->nr_queues = 0;
 465 }
 466
 467 static void auxtrace_heapify(struct auxtrace_heap_item *heap_array,
 468                              unsigned int pos, unsigned int queue_nr,
 469                              u64 ordinal)
 470 {
 471         unsigned int parent;
 472
 473         while (pos) {
 474                 parent = (pos - 1) >> 1;
 475                 if (heap_array[parent].ordinal <= ordinal)
 476                         break;
 477                 heap_array[pos] = heap_array[parent];
 478                 pos = parent;
 479         }
 480         heap_array[pos].queue_nr = queue_nr;
 481         heap_array[pos].ordinal = ordinal;
 482 }
 483
 484 int auxtrace_heap__add(struct auxtrace_heap *heap, unsigned int queue_nr,
 485                        u64 ordinal)
 486 {
 487         struct auxtrace_heap_item *heap_array;
 488
 489         if (queue_nr >= heap->heap_sz) {
 490                 unsigned int heap_sz = AUXTRACE_INIT_NR_QUEUES;
 491
 492                 while (heap_sz <= queue_nr)
 493                         heap_sz <<= 1;
 494                 heap_array = realloc(heap->heap_array,
 495                                      heap_sz * sizeof(struct auxtrace_heap_item));
 496                 if (!heap_array)
 497                         return -ENOMEM;
 498                 heap->heap_array = heap_array;
 499                 heap->heap_sz = heap_sz;
 500         }
 501
 502         auxtrace_heapify(heap->heap_array, heap->heap_cnt++, queue_nr, ordinal);
 503
 504         return 0;
 505 }
 506
 507 void auxtrace_heap__free(struct auxtrace_heap *heap)
 508 {
 509         zfree(&heap->heap_array);
 510         heap->heap_cnt = 0;
 511         heap->heap_sz = 0;
 512 }
 513
 514 void auxtrace_heap__pop(struct auxtrace_heap *heap)
 515 {
 516         unsigned int pos, last, heap_cnt = heap->heap_cnt;
 517         struct auxtrace_heap_item *heap_array;
 518
 519         if (!heap_cnt)
 520                 return;
 521
 522         heap->heap_cnt -= 1;
 523
 524         heap_array = heap->heap_array;
 525
 526         pos = 0;
 527         while (1) {
 528                 unsigned int left, right;
 529
 530                 left = (pos << 1) + 1;
 531                 if (left >= heap_cnt)
 532                         break;
 533                 right = left + 1;
 534                 if (right >= heap_cnt) {
 535                         heap_array[pos] = heap_array[left];
 536                         return;
 537                 }
 538                 if (heap_array[left].ordinal < heap_array[right].ordinal) {
 539                         heap_array[pos] = heap_array[left];
 540                         pos = left;
 541                 } else {
 542                         heap_array[pos] = heap_array[right];
 543                         pos = right;
 544                 }
 545         }
 546
 547         last = heap_cnt - 1;
 548         auxtrace_heapify(heap_array, pos, heap_array[last].queue_nr,
 549                          heap_array[last].ordinal);
 550 }
 551
 552 size_t auxtrace_record__info_priv_size(struct auxtrace_record *itr,
 553                                        struct evlist *evlist)
 554 {
 555         if (itr)
 556                 return itr->info_priv_size(itr, evlist);
 557         return 0;
 558 }
 559
 560 static int auxtrace_not_supported(void)
 561 {
 562         pr_err("AUX area tracing is not supported on this architecture\n");
 563         return -EINVAL;
 564 }
 565
 566 int auxtrace_record__info_fill(struct auxtrace_record *itr,
 567                                struct perf_session *session,
 568                                struct perf_record_auxtrace_info *auxtrace_info,
 569                                size_t priv_size)
 570 {
 571         if (itr)
 572                 return itr->info_fill(itr, session, auxtrace_info, priv_size);
 573         return auxtrace_not_supported();
 574 }
 575
 576 void auxtrace_record__free(struct auxtrace_record *itr)
 577 {
 578         if (itr)
 579                 itr->free(itr);
 580 }
 581
 582 int auxtrace_record__snapshot_start(struct auxtrace_record *itr)
 583 {
 584         if (itr && itr->snapshot_start)
 585                 return itr->snapshot_start(itr);
 586         return 0;
 587 }
 588
 589 int auxtrace_record__snapshot_finish(struct auxtrace_record *itr, bool on_exit)
 590 {
 591         if (!on_exit && itr && itr->snapshot_finish)
 592                 return itr->snapshot_finish(itr);
 593         return 0;
 594 }
 595
 596 int auxtrace_record__find_snapshot(struct auxtrace_record *itr, int idx,
 597                                    struct auxtrace_mmap *mm,
 598                                    unsigned char *data, u64 *head, u64 *old)
 599 {
 600         if (itr && itr->find_snapshot)
 601                 return itr->find_snapshot(itr, idx, mm, data, head, old);
 602         return 0;
 603 }
 604
 605 int auxtrace_record__options(struct auxtrace_record *itr,
 606                              struct evlist *evlist,
 607                              struct record_opts *opts)
 608 {
 609         if (itr) {
 610                 itr->evlist = evlist;
 611                 return itr->recording_options(itr, evlist, opts);
 612         }
 613         return 0;
 614 }
 615
 616 u64 auxtrace_record__reference(struct auxtrace_record *itr)
 617 {
 618         if (itr)
 619                 return itr->reference(itr);
 620         return 0;
 621 }
 622
 623 int auxtrace_parse_snapshot_options(struct auxtrace_record *itr,
 624                                     struct record_opts *opts, const char *str)
 625 {
 626         if (!str)
 627                 return 0;
 628
 629         /* PMU-agnostic options */
 630         switch (*str) {
 631         case 'e':
 632                 opts->auxtrace_snapshot_on_exit = true;
 633                 str++;
 634                 break;
 635         default:
 636                 break;
 637         }
 638
 639         if (itr && itr->parse_snapshot_options)
 640                 return itr->parse_snapshot_options(itr, opts, str);
 641
 642         pr_err("No AUX area tracing to snapshot\n");
 643         return -EINVAL;
 644 }
 645
 646 int auxtrace_record__read_finish(struct auxtrace_record *itr, int idx)
 647 {
 648         struct evsel *evsel;
 649
 650         if (!itr->evlist || !itr->pmu)
 651                 return -EINVAL;
 652
 653         evlist__for_each_entry(itr->evlist, evsel) {
 654                 if (evsel->core.attr.type == itr->pmu->type) {
 655                         if (evsel->disabled)
 656                                 return 0;
 657                         return perf_evlist__enable_event_idx(itr->evlist, evsel,
 658                                                              idx);
 659                 }
 660         }
 661         return -EINVAL;
 662 }
 663
 664 /*
 665  * Event record size is 16-bit which results in a maximum size of about 64KiB.
 666  * Allow about 4KiB for the rest of the sample record, to give a maximum
 667  * AUX area sample size of 60KiB.
 668  */
 669 #define MAX_AUX_SAMPLE_SIZE (60 * 1024)
 670
 671 /* Arbitrary default size if no other default provided */
 672 #define DEFAULT_AUX_SAMPLE_SIZE (4 * 1024)
 673
 674 static int auxtrace_validate_aux_sample_size(struct evlist *evlist,
 675                                              struct record_opts *opts)
 676 {
 677         struct evsel *evsel;
 678         bool has_aux_leader = false;
 679         u32 sz;
 680
 681         evlist__for_each_entry(evlist, evsel) {
 682                 sz = evsel->core.attr.aux_sample_size;
 683                 if (evsel__is_group_leader(evsel)) {
 684                         has_aux_leader = evsel__is_aux_event(evsel);
 685                         if (sz) {
 686                                 if (has_aux_leader)
 687                                         pr_err("Cannot add AUX area sampling to an AUX area event\n");
 688                                 else
 689                                         pr_err("Cannot add AUX area sampling to a group leader\n");
 690                                 return -EINVAL;
 691                         }
 692                 }
 693                 if (sz > MAX_AUX_SAMPLE_SIZE) {
 694                         pr_err("AUX area sample size %u too big, max. %d\n",
 695                                sz, MAX_AUX_SAMPLE_SIZE);
 696                         return -EINVAL;
 697                 }
 698                 if (sz) {
 699                         if (!has_aux_leader) {
 700                                 pr_err("Cannot add AUX area sampling because group leader is not an AUX area event\n");
 701                                 return -EINVAL;
 702                         }
 703                         evsel__set_sample_bit(evsel, AUX);
 704                         opts->auxtrace_sample_mode = true;
 705                 } else {
 706                         evsel__reset_sample_bit(evsel, AUX);
 707                 }
 708         }
 709
 710         if (!opts->auxtrace_sample_mode) {
 711                 pr_err("AUX area sampling requires an AUX area event group leader plus other events to which to add samples\n");
 712                 return -EINVAL;
 713         }
 714
 715         if (!perf_can_aux_sample()) {
 716                 pr_err("AUX area sampling is not supported by kernel\n");
 717                 return -EINVAL;
 718         }
 719
 720         return 0;
 721 }
 722
 723 int auxtrace_parse_sample_options(struct auxtrace_record *itr,
 724                                   struct evlist *evlist,
 725                                   struct record_opts *opts, const char *str)
 726 {
 727         struct evsel_config_term *term;
 728         struct evsel *aux_evsel;
 729         bool has_aux_sample_size = false;
 730         bool has_aux_leader = false;
 731         struct evsel *evsel;
 732         char *endptr;
 733         unsigned long sz;
 734
 735         if (!str)
 736                 goto no_opt;
 737
 738         if (!itr) {
 739                 pr_err("No AUX area event to sample\n");
 740                 return -EINVAL;
 741         }
 742
 743         sz = strtoul(str, &endptr, 0);
 744         if (*endptr || sz > UINT_MAX) {
 745                 pr_err("Bad AUX area sampling option: '%s'\n", str);
 746                 return -EINVAL;
 747         }
 748
 749         if (!sz)
 750                 sz = itr->default_aux_sample_size;
 751
 752         if (!sz)
 753                 sz = DEFAULT_AUX_SAMPLE_SIZE;
 754
 755         /* Set aux_sample_size based on --aux-sample option */
 756         evlist__for_each_entry(evlist, evsel) {
 757                 if (evsel__is_group_leader(evsel)) {
 758                         has_aux_leader = evsel__is_aux_event(evsel);
 759                 } else if (has_aux_leader) {
 760                         evsel->core.attr.aux_sample_size = sz;
 761                 }
 762         }
 763 no_opt:
 764         aux_evsel = NULL;
 765         /* Override with aux_sample_size from config term */
 766         evlist__for_each_entry(evlist, evsel) {
 767                 if (evsel__is_aux_event(evsel))
 768                         aux_evsel = evsel;
 769                 term = evsel__get_config_term(evsel, AUX_SAMPLE_SIZE);
 770                 if (term) {
 771                         has_aux_sample_size = true;
 772                         evsel->core.attr.aux_sample_size = term->val.aux_sample_size;
 773                         /* If possible, group with the AUX event */
 774                         if (aux_evsel && evsel->core.attr.aux_sample_size)
 775                                 perf_evlist__regroup(evlist, aux_evsel, evsel);
 776                 }
 777         }
 778
 779         if (!str && !has_aux_sample_size)
 780                 return 0;
 781
 782         if (!itr) {
 783                 pr_err("No AUX area event to sample\n");
 784                 return -EINVAL;
 785         }
 786
 787         return auxtrace_validate_aux_sample_size(evlist, opts);
 788 }
 789
 790 struct auxtrace_record *__weak
 791 auxtrace_record__init(struct evlist *evlist __maybe_unused, int *err)
 792 {
 793         *err = 0;
 794         return NULL;
 795 }
 796
 797 static int auxtrace_index__alloc(struct list_head *head)
 798 {
 799         struct auxtrace_index *auxtrace_index;
 800
 801         auxtrace_index = malloc(sizeof(struct auxtrace_index));
 802         if (!auxtrace_index)
 803                 return -ENOMEM;
 804
 805         auxtrace_index->nr = 0;
 806         INIT_LIST_HEAD(&auxtrace_index->list);
 807
 808         list_add_tail(&auxtrace_index->list, head);
 809
 810         return 0;
 811 }
 812
 813 void auxtrace_index__free(struct list_head *head)
 814 {
 815         struct auxtrace_index *auxtrace_index, *n;
 816
 817         list_for_each_entry_safe(auxtrace_index, n, head, list) {
 818                 list_del_init(&auxtrace_index->list);
 819                 free(auxtrace_index);
 820         }
 821 }
 822
 823 static struct auxtrace_index *auxtrace_index__last(struct list_head *head)
 824 {
 825         struct auxtrace_index *auxtrace_index;
 826         int err;
 827
 828         if (list_empty(head)) {
 829                 err = auxtrace_index__alloc(head);
 830                 if (err)
 831                         return NULL;
 832         }
 833
 834         auxtrace_index = list_entry(head->prev, struct auxtrace_index, list);
 835
 836         if (auxtrace_index->nr >= PERF_AUXTRACE_INDEX_ENTRY_COUNT) {
 837                 err = auxtrace_index__alloc(head);
 838                 if (err)
 839                         return NULL;
 840                 auxtrace_index = list_entry(head->prev, struct auxtrace_index,
 841                                             list);
 842         }
 843
 844         return auxtrace_index;
 845 }
 846
 847 int auxtrace_index__auxtrace_event(struct list_head *head,
 848                                    union perf_event *event, off_t file_offset)
 849 {
 850         struct auxtrace_index *auxtrace_index;
 851         size_t nr;
 852
 853         auxtrace_index = auxtrace_index__last(head);
 854         if (!auxtrace_index)
 855                 return -ENOMEM;
 856
 857         nr = auxtrace_index->nr;
 858         auxtrace_index->entries[nr].file_offset = file_offset;
 859         auxtrace_index->entries[nr].sz = event->header.size;
 860         auxtrace_index->nr += 1;
 861
 862         return 0;
 863 }
 864
 865 static int auxtrace_index__do_write(int fd,
 866                                     struct auxtrace_index *auxtrace_index)
 867 {
 868         struct auxtrace_index_entry ent;
 869         size_t i;
 870
 871         for (i = 0; i < auxtrace_index->nr; i++) {
 872                 ent.file_offset = auxtrace_index->entries[i].file_offset;
 873                 ent.sz = auxtrace_index->entries[i].sz;
 874                 if (writen(fd, &ent, sizeof(ent)) != sizeof(ent))
 875                         return -errno;
 876         }
 877         return 0;
 878 }
 879
 880 int auxtrace_index__write(int fd, struct list_head *head)
 881 {
 882         struct auxtrace_index *auxtrace_index;
 883         u64 total = 0;
 884         int err;
 885
 886         list_for_each_entry(auxtrace_index, head, list)
 887                 total += auxtrace_index->nr;
 888
 889         if (writen(fd, &total, sizeof(total)) != sizeof(total))
 890                 return -errno;
 891
 892         list_for_each_entry(auxtrace_index, head, list) {
 893                 err = auxtrace_index__do_write(fd, auxtrace_index);
 894                 if (err)
 895                         return err;
 896         }
 897
 898         return 0;
 899 }
 900
 901 static int auxtrace_index__process_entry(int fd, struct list_head *head,
 902                                          bool needs_swap)
 903 {
 904         struct auxtrace_index *auxtrace_index;
 905         struct auxtrace_index_entry ent;
 906         size_t nr;
 907
 908         if (readn(fd, &ent, sizeof(ent)) != sizeof(ent))
 909                 return -1;
 910
 911         auxtrace_index = auxtrace_index__last(head);
 912         if (!auxtrace_index)
 913                 return -1;
 914
 915         nr = auxtrace_index->nr;
 916         if (needs_swap) {
 917                 auxtrace_index->entries[nr].file_offset =
 918                                                 bswap_64(ent.file_offset);
 919                 auxtrace_index->entries[nr].sz = bswap_64(ent.sz);
 920         } else {
 921                 auxtrace_index->entries[nr].file_offset = ent.file_offset;
 922                 auxtrace_index->entries[nr].sz = ent.sz;
 923         }
 924
 925         auxtrace_index->nr = nr + 1;
 926
 927         return 0;
 928 }
 929
 930 int auxtrace_index__process(int fd, u64 size, struct perf_session *session,
 931                             bool needs_swap)
 932 {
 933         struct list_head *head = &session->auxtrace_index;
 934         u64 nr;
 935
 936         if (readn(fd, &nr, sizeof(u64)) != sizeof(u64))
 937                 return -1;
 938
 939         if (needs_swap)
 940                 nr = bswap_64(nr);
 941
 942         if (sizeof(u64) + nr * sizeof(struct auxtrace_index_entry) > size)
 943                 return -1;
 944
 945         while (nr--) {
 946                 int err;
 947
 948                 err = auxtrace_index__process_entry(fd, head, needs_swap);
 949                 if (err)
 950                         return -1;
 951         }
 952
 953         return 0;
 954 }
 955
 956 static int auxtrace_queues__process_index_entry(struct auxtrace_queues *queues,
 957                                                 struct perf_session *session,
 958                                                 struct auxtrace_index_entry *ent)
 959 {
 960         return auxtrace_queues__add_indexed_event(queues, session,
 961                                                   ent->file_offset, ent->sz);
 962 }
 963
 964 int auxtrace_queues__process_index(struct auxtrace_queues *queues,
 965                                    struct perf_session *session)
 966 {
 967         struct auxtrace_index *auxtrace_index;
 968         struct auxtrace_index_entry *ent;
 969         size_t i;
 970         int err;
 971
 972         if (auxtrace__dont_decode(session))
 973                 return 0;
 974
 975         list_for_each_entry(auxtrace_index, &session->auxtrace_index, list) {
 976                 for (i = 0; i < auxtrace_index->nr; i++) {
 977                         ent = &auxtrace_index->entries[i];
 978                         err = auxtrace_queues__process_index_entry(queues,
 979                                                                    session,
 980                                                                    ent);
 981                         if (err)
 982                                 return err;
 983                 }
 984         }
 985         return 0;
 986 }
 987
 988 struct auxtrace_buffer *auxtrace_buffer__next(struct auxtrace_queue *queue,
 989                                               struct auxtrace_buffer *buffer)
 990 {
 991         if (buffer) {
 992                 if (list_is_last(&buffer->list, &queue->head))
 993                         return NULL;
 994                 return list_entry(buffer->list.next, struct auxtrace_buffer,
 995                                   list);
 996         } else {
 997                 if (list_empty(&queue->head))
 998                         return NULL;
 999                 return list_entry(queue->head.next, struct auxtrace_buffer,
1000                                   list);
1001         }
1002 }
1003
1004 struct auxtrace_queue *auxtrace_queues__sample_queue(struct auxtrace_queues *queues,
1005                                                      struct perf_sample *sample,
1006                                                      struct perf_session *session)
1007 {
1008         struct perf_sample_id *sid;
1009         unsigned int idx;
1010         u64 id;
1011
1012         id = sample->id;
1013         if (!id)
1014                 return NULL;
1015
1016         sid = perf_evlist__id2sid(session->evlist, id);
1017         if (!sid)
1018                 return NULL;
1019
1020         idx = sid->idx;
1021
1022         if (idx >= queues->nr_queues)
1023                 return NULL;
1024
1025         return &queues->queue_array[idx];
1026 }
1027
1028 int auxtrace_queues__add_sample(struct auxtrace_queues *queues,
1029                                 struct perf_session *session,
1030                                 struct perf_sample *sample, u64 data_offset,
1031                                 u64 reference)
1032 {
1033         struct auxtrace_buffer buffer = {
1034                 .pid = -1,
1035                 .data_offset = data_offset,
1036                 .reference = reference,
1037                 .size = sample->aux_sample.size,
1038         };
1039         struct perf_sample_id *sid;
1040         u64 id = sample->id;
1041         unsigned int idx;
1042
1043         if (!id)
1044                 return -EINVAL;
1045
1046         sid = perf_evlist__id2sid(session->evlist, id);
1047         if (!sid)
1048                 return -ENOENT;
1049
1050         idx = sid->idx;
1051         buffer.tid = sid->tid;
1052         buffer.cpu = sid->cpu;
1053
1054         return auxtrace_queues__add_buffer(queues, session, idx, &buffer, NULL);
1055 }
1056
1057 struct queue_data {
1058         bool samples;
1059         bool events;
1060 };
1061
1062 static int auxtrace_queue_data_cb(struct perf_session *session,
1063                                   union perf_event *event, u64 offset,
1064                                   void *data)
1065 {
1066         struct queue_data *qd = data;
1067         struct perf_sample sample;
1068         int err;
1069
1070         if (qd->events && event->header.type == PERF_RECORD_AUXTRACE) {
1071                 if (event->header.size < sizeof(struct perf_record_auxtrace))
1072                         return -EINVAL;
1073                 offset += event->header.size;
1074                 return session->auxtrace->queue_data(session, NULL, event,
1075                                                      offset);
1076         }
1077
1078         if (!qd->samples || event->header.type != PERF_RECORD_SAMPLE)
1079                 return 0;
1080
1081         err = perf_evlist__parse_sample(session->evlist, event, &sample);
1082         if (err)
1083                 return err;
1084
1085         if (!sample.aux_sample.size)
1086                 return 0;
1087
1088         offset += sample.aux_sample.data - (void *)event;
1089
1090         return session->auxtrace->queue_data(session, &sample, NULL, offset);
1091 }
1092
1093 int auxtrace_queue_data(struct perf_session *session, bool samples, bool events)
1094 {
1095         struct queue_data qd = {
1096                 .samples = samples,
1097                 .events = events,
1098         };
1099
1100         if (auxtrace__dont_decode(session))
1101                 return 0;
1102
1103         if (!session->auxtrace || !session->auxtrace->queue_data)
1104                 return -EINVAL;
1105
1106         return perf_session__peek_events(session, session->header.data_offset,
1107                                          session->header.data_size,
1108                                          auxtrace_queue_data_cb, &qd);
1109 }
1110
1111 void *auxtrace_buffer__get_data(struct auxtrace_buffer *buffer, int fd)
1112 {
1113         size_t adj = buffer->data_offset & (page_size - 1);
1114         size_t size = buffer->size + adj;
1115         off_t file_offset = buffer->data_offset - adj;
1116         void *addr;
1117
1118         if (buffer->data)
1119                 return buffer->data;
1120
1121         addr = mmap(NULL, size, PROT_READ, MAP_SHARED, fd, file_offset);
1122         if (addr == MAP_FAILED)
1123                 return NULL;
1124
1125         buffer->mmap_addr = addr;
1126         buffer->mmap_size = size;
1127
1128         buffer->data = addr + adj;
1129
1130         return buffer->data;
1131 }
1132
1133 void auxtrace_buffer__put_data(struct auxtrace_buffer *buffer)
1134 {
1135         if (!buffer->data || !buffer->mmap_addr)
1136                 return;
1137         munmap(buffer->mmap_addr, buffer->mmap_size);
1138         buffer->mmap_addr = NULL;
1139         buffer->mmap_size = 0;
1140         buffer->data = NULL;
1141         buffer->use_data = NULL;
1142 }
1143
1144 void auxtrace_buffer__drop_data(struct auxtrace_buffer *buffer)
1145 {
1146         auxtrace_buffer__put_data(buffer);
1147         if (buffer->data_needs_freeing) {
1148                 buffer->data_needs_freeing = false;
1149                 zfree(&buffer->data);
1150                 buffer->use_data = NULL;
1151                 buffer->size = 0;
1152         }
1153 }
1154
1155 void auxtrace_buffer__free(struct auxtrace_buffer *buffer)
1156 {
1157         auxtrace_buffer__drop_data(buffer);
1158         free(buffer);
1159 }
1160
1161 void auxtrace_synth_error(struct perf_record_auxtrace_error *auxtrace_error, int type,
1162                           int code, int cpu, pid_t pid, pid_t tid, u64 ip,
1163                           const char *msg, u64 timestamp)
1164 {
1165         size_t size;
1166
1167         memset(auxtrace_error, 0, sizeof(struct perf_record_auxtrace_error));
1168
1169         auxtrace_error->header.type = PERF_RECORD_AUXTRACE_ERROR;
1170         auxtrace_error->type = type;
1171         auxtrace_error->code = code;
1172         auxtrace_error->cpu = cpu;
1173         auxtrace_error->pid = pid;
1174         auxtrace_error->tid = tid;
1175         auxtrace_error->fmt = 1;
1176         auxtrace_error->ip = ip;
1177         auxtrace_error->time = timestamp;
1178         strlcpy(auxtrace_error->msg, msg, MAX_AUXTRACE_ERROR_MSG);
1179
1180         size = (void *)auxtrace_error->msg - (void *)auxtrace_error +
1181                strlen(auxtrace_error->msg) + 1;
1182         auxtrace_error->header.size = PERF_ALIGN(size, sizeof(u64));
1183 }
1184
1185 int perf_event__synthesize_auxtrace_info(struct auxtrace_record *itr,
1186                                          struct perf_tool *tool,
1187                                          struct perf_session *session,
1188                                          perf_event__handler_t process)
1189 {
1190         union perf_event *ev;
1191         size_t priv_size;
1192         int err;
1193
1194         pr_debug2("Synthesizing auxtrace information\n");
1195         priv_size = auxtrace_record__info_priv_size(itr, session->evlist);
1196         ev = zalloc(sizeof(struct perf_record_auxtrace_info) + priv_size);
1197         if (!ev)
1198                 return -ENOMEM;
1199
1200         ev->auxtrace_info.header.type = PERF_RECORD_AUXTRACE_INFO;
1201         ev->auxtrace_info.header.size = sizeof(struct perf_record_auxtrace_info) +
1202                                         priv_size;
1203         err = auxtrace_record__info_fill(itr, session, &ev->auxtrace_info,
1204                                          priv_size);
1205         if (err)
1206                 goto out_free;
1207
1208         err = process(tool, ev, NULL, NULL);
1209 out_free:
1210         free(ev);
1211         return err;
1212 }
1213
1214 static void unleader_evsel(struct evlist *evlist, struct evsel *leader)
1215 {
1216         struct evsel *new_leader = NULL;
1217         struct evsel *evsel;
1218
1219         /* Find new leader for the group */
1220         evlist__for_each_entry(evlist, evsel) {
1221                 if (evsel->leader != leader || evsel == leader)
1222                         continue;
1223                 if (!new_leader)
1224                         new_leader = evsel;
1225                 evsel->leader = new_leader;
1226         }
1227
1228         /* Update group information */
1229         if (new_leader) {
1230                 zfree(&new_leader->group_name);
1231                 new_leader->group_name = leader->group_name;
1232                 leader->group_name = NULL;
1233
1234                 new_leader->core.nr_members = leader->core.nr_members - 1;
1235                 leader->core.nr_members = 1;
1236         }
1237 }
1238
1239 static void unleader_auxtrace(struct perf_session *session)
1240 {
1241         struct evsel *evsel;
1242
1243         evlist__for_each_entry(session->evlist, evsel) {
1244                 if (auxtrace__evsel_is_auxtrace(session, evsel) &&
1245                     evsel__is_group_leader(evsel)) {
1246                         unleader_evsel(session->evlist, evsel);
1247                 }
1248         }
1249 }
1250
1251 int perf_event__process_auxtrace_info(struct perf_session *session,
1252                                       union perf_event *event)
1253 {
1254         enum auxtrace_type type = event->auxtrace_info.type;
1255         int err;
1256
1257         if (dump_trace)
1258                 fprintf(stdout, " type: %u\n", type);
1259
1260         switch (type) {
1261         case PERF_AUXTRACE_INTEL_PT:
1262                 err = intel_pt_process_auxtrace_info(event, session);
1263                 break;
1264         case PERF_AUXTRACE_INTEL_BTS:
1265                 err = intel_bts_process_auxtrace_info(event, session);
1266                 break;
1267         case PERF_AUXTRACE_ARM_SPE:
1268                 err = arm_spe_process_auxtrace_info(event, session);
1269                 break;
1270         case PERF_AUXTRACE_CS_ETM:
1271                 err = cs_etm__process_auxtrace_info(event, session);
1272                 break;
1273         case PERF_AUXTRACE_S390_CPUMSF:
1274                 err = s390_cpumsf_process_auxtrace_info(event, session);
1275                 break;
1276         case PERF_AUXTRACE_UNKNOWN:
1277         default:
1278                 return -EINVAL;
1279         }
1280
1281         if (err)
1282                 return err;
1283
1284         unleader_auxtrace(session);
1285
1286         return 0;
1287 }
1288
1289 s64 perf_event__process_auxtrace(struct perf_session *session,
1290                                  union perf_event *event)
1291 {
1292         s64 err;
1293
1294         if (dump_trace)
1295                 fprintf(stdout, " size: %#"PRI_lx64"  offset: %#"PRI_lx64"  ref: %#"PRI_lx64"  idx: %u  tid: %d  cpu: %d\n",
1296                         event->auxtrace.size, event->auxtrace.offset,
1297                         event->auxtrace.reference, event->auxtrace.idx,
1298                         event->auxtrace.tid, event->auxtrace.cpu);
1299
1300         if (auxtrace__dont_decode(session))
1301                 return event->auxtrace.size;
1302
1303         if (!session->auxtrace || event->header.type != PERF_RECORD_AUXTRACE)
1304                 return -EINVAL;
1305
1306         err = session->auxtrace->process_auxtrace_event(session, event, session->tool);
1307         if (err < 0)
1308                 return err;
1309
1310         return event->auxtrace.size;
1311 }
1312
1313 #define PERF_ITRACE_DEFAULT_PERIOD_TYPE         PERF_ITRACE_PERIOD_NANOSECS
1314 #define PERF_ITRACE_DEFAULT_PERIOD              100000
1315 #define PERF_ITRACE_DEFAULT_CALLCHAIN_SZ        16
1316 #define PERF_ITRACE_MAX_CALLCHAIN_SZ            1024
1317 #define PERF_ITRACE_DEFAULT_LAST_BRANCH_SZ      64
1318 #define PERF_ITRACE_MAX_LAST_BRANCH_SZ          1024
1319
1320 void itrace_synth_opts__set_default(struct itrace_synth_opts *synth_opts,
1321                                     bool no_sample)
1322 {
1323         synth_opts->branches = true;
1324         synth_opts->transactions = true;
1325         synth_opts->ptwrites = true;
1326         synth_opts->pwr_events = true;
1327         synth_opts->other_events = true;
1328         synth_opts->errors = true;
1329         synth_opts->flc = true;
1330         synth_opts->llc = true;
1331         synth_opts->tlb = true;
1332         synth_opts->remote_access = true;
1333
1334         if (no_sample) {
1335                 synth_opts->period_type = PERF_ITRACE_PERIOD_INSTRUCTIONS;
1336                 synth_opts->period = 1;
1337                 synth_opts->calls = true;
1338         } else {
1339                 synth_opts->instructions = true;
1340                 synth_opts->period_type = PERF_ITRACE_DEFAULT_PERIOD_TYPE;
1341                 synth_opts->period = PERF_ITRACE_DEFAULT_PERIOD;
1342         }
1343         synth_opts->callchain_sz = PERF_ITRACE_DEFAULT_CALLCHAIN_SZ;
1344         synth_opts->last_branch_sz = PERF_ITRACE_DEFAULT_LAST_BRANCH_SZ;
1345         synth_opts->initial_skip = 0;
1346 }
1347
1348 static int get_flag(const char **ptr, unsigned int *flags)
1349 {
1350         while (1) {
1351                 char c = **ptr;
1352
1353                 if (c >= 'a' && c <= 'z') {
1354                         *flags |= 1 << (c - 'a');
1355                         ++*ptr;
1356                         return 0;
1357                 } else if (c == ' ') {
1358                         ++*ptr;
1359                         continue;
1360                 } else {
1361                         return -1;
1362                 }
1363         }
1364 }
1365
1366 static int get_flags(const char **ptr, unsigned int *plus_flags, unsigned int *minus_flags)
1367 {
1368         while (1) {
1369                 switch (**ptr) {
1370                 case '+':
1371                         ++*ptr;
1372                         if (get_flag(ptr, plus_flags))
1373                                 return -1;
1374                         break;
1375                 case '-':
1376                         ++*ptr;
1377                         if (get_flag(ptr, minus_flags))
1378                                 return -1;
1379                         break;
1380                 case ' ':
1381                         ++*ptr;
1382                         break;
1383                 default:
1384                         return 0;
1385                 }
1386         }
1387 }
1388
1389 /*
1390  * Please check tools/perf/Documentation/perf-script.txt for information
1391  * about the options parsed here, which is introduced after this cset,
1392  * when support in 'perf script' for these options is introduced.
1393  */
1394 int itrace_parse_synth_opts(const struct option *opt, const char *str,
1395                             int unset)
1396 {
1397         struct itrace_synth_opts *synth_opts = opt->value;
1398         const char *p;
1399         char *endptr;
1400         bool period_type_set = false;
1401         bool period_set = false;
1402
1403         synth_opts->set = true;
1404
1405         if (unset) {
1406                 synth_opts->dont_decode = true;
1407                 return 0;
1408         }
1409
1410         if (!str) {
1411                 itrace_synth_opts__set_default(synth_opts,
1412                                                synth_opts->default_no_sample);
1413                 return 0;
1414         }
1415
1416         for (p = str; *p;) {
1417                 switch (*p++) {
1418                 case 'i':
1419                         synth_opts->instructions = true;
1420                         while (*p == ' ' || *p == ',')
1421                                 p += 1;
1422                         if (isdigit(*p)) {
1423                                 synth_opts->period = strtoull(p, &endptr, 10);
1424                                 period_set = true;
1425                                 p = endptr;
1426                                 while (*p == ' ' || *p == ',')
1427                                         p += 1;
1428                                 switch (*p++) {
1429                                 case 'i':
1430                                         synth_opts->period_type =
1431                                                 PERF_ITRACE_PERIOD_INSTRUCTIONS;
1432                                         period_type_set = true;
1433                                         break;
1434                                 case 't':
1435                                         synth_opts->period_type =
1436                                                 PERF_ITRACE_PERIOD_TICKS;
1437                                         period_type_set = true;
1438                                         break;
1439                                 case 'm':
1440                                         synth_opts->period *= 1000;
1441                                         /* Fall through */
1442                                 case 'u':
1443                                         synth_opts->period *= 1000;
1444                                         /* Fall through */
1445                                 case 'n':
1446                                         if (*p++ != 's')
1447                                                 goto out_err;
1448                                         synth_opts->period_type =
1449                                                 PERF_ITRACE_PERIOD_NANOSECS;
1450                                         period_type_set = true;
1451                                         break;
1452                                 case '\0':
1453                                         goto out;
1454                                 default:
1455                                         goto out_err;
1456                                 }
1457                         }
1458                         break;
1459                 case 'b':
1460                         synth_opts->branches = true;
1461                         break;
1462                 case 'x':
1463                         synth_opts->transactions = true;
1464                         break;
1465                 case 'w':
1466                         synth_opts->ptwrites = true;
1467                         break;
1468                 case 'p':
1469                         synth_opts->pwr_events = true;
1470                         break;
1471                 case 'o':
1472                         synth_opts->other_events = true;
1473                         break;
1474                 case 'e':
1475                         synth_opts->errors = true;
1476                         if (get_flags(&p, &synth_opts->error_plus_flags,
1477                                       &synth_opts->error_minus_flags))
1478                                 goto out_err;
1479                         break;
1480                 case 'd':
1481                         synth_opts->log = true;
1482                         if (get_flags(&p, &synth_opts->log_plus_flags,
1483                                       &synth_opts->log_minus_flags))
1484                                 goto out_err;
1485                         break;
1486                 case 'c':
1487                         synth_opts->branches = true;
1488                         synth_opts->calls = true;
1489                         break;
1490                 case 'r':
1491                         synth_opts->branches = true;
1492                         synth_opts->returns = true;
1493                         break;
1494                 case 'G':
1495                 case 'g':
1496                         if (p[-1] == 'G')
1497                                 synth_opts->add_callchain = true;
1498                         else
1499                                 synth_opts->callchain = true;
1500                         synth_opts->callchain_sz =
1501                                         PERF_ITRACE_DEFAULT_CALLCHAIN_SZ;
1502                         while (*p == ' ' || *p == ',')
1503                                 p += 1;
1504                         if (isdigit(*p)) {
1505                                 unsigned int val;
1506
1507                                 val = strtoul(p, &endptr, 10);
1508                                 p = endptr;
1509                                 if (!val || val > PERF_ITRACE_MAX_CALLCHAIN_SZ)
1510                                         goto out_err;
1511                                 synth_opts->callchain_sz = val;
1512                         }
1513                         break;
1514                 case 'L':
1515                 case 'l':
1516                         if (p[-1] == 'L')
1517                                 synth_opts->add_last_branch = true;
1518                         else
1519                                 synth_opts->last_branch = true;
1520                         synth_opts->last_branch_sz =
1521                                         PERF_ITRACE_DEFAULT_LAST_BRANCH_SZ;
1522                         while (*p == ' ' || *p == ',')
1523                                 p += 1;
1524                         if (isdigit(*p)) {
1525                                 unsigned int val;
1526
1527                                 val = strtoul(p, &endptr, 10);
1528                                 p = endptr;
1529                                 if (!val ||
1530                                     val > PERF_ITRACE_MAX_LAST_BRANCH_SZ)
1531                                         goto out_err;
1532                                 synth_opts->last_branch_sz = val;
1533                         }
1534                         break;
1535                 case 's':
1536                         synth_opts->initial_skip = strtoul(p, &endptr, 10);
1537                         if (p == endptr)
1538                                 goto out_err;
1539                         p = endptr;
1540                         break;
1541                 case 'f':
1542                         synth_opts->flc = true;
1543                         break;
1544                 case 'm':
1545                         synth_opts->llc = true;
1546                         break;
1547                 case 't':
1548                         synth_opts->tlb = true;
1549                         break;
1550                 case 'a':
1551                         synth_opts->remote_access = true;
1552                         break;
1553                 case 'q':
1554                         synth_opts->quick += 1;
1555                         break;
1556                 case ' ':
1557                 case ',':
1558                         break;
1559                 default:
1560                         goto out_err;
1561                 }
1562         }
1563 out:
1564         if (synth_opts->instructions) {
1565                 if (!period_type_set)
1566                         synth_opts->period_type =
1567                                         PERF_ITRACE_DEFAULT_PERIOD_TYPE;
1568                 if (!period_set)
1569                         synth_opts->period = PERF_ITRACE_DEFAULT_PERIOD;
1570         }
1571
1572         return 0;
1573
1574 out_err:
1575         pr_err("Bad Instruction Tracing options '%s'\n", str);
1576         return -EINVAL;
1577 }
1578
1579 static const char * const auxtrace_error_type_name[] = {
1580         [PERF_AUXTRACE_ERROR_ITRACE] = "instruction trace",
1581 };
1582
1583 static const char *auxtrace_error_name(int type)
1584 {
1585         const char *error_type_name = NULL;
1586
1587         if (type < PERF_AUXTRACE_ERROR_MAX)
1588                 error_type_name = auxtrace_error_type_name[type];
1589         if (!error_type_name)
1590                 error_type_name = "unknown AUX";
1591         return error_type_name;
1592 }
1593
1594 size_t perf_event__fprintf_auxtrace_error(union perf_event *event, FILE *fp)
1595 {
1596         struct perf_record_auxtrace_error *e = &event->auxtrace_error;
1597         unsigned long long nsecs = e->time;
1598         const char *msg = e->msg;
1599         int ret;
1600
1601         ret = fprintf(fp, " %s error type %u",
1602                       auxtrace_error_name(e->type), e->type);
1603
1604         if (e->fmt && nsecs) {
1605                 unsigned long secs = nsecs / NSEC_PER_SEC;
1606
1607                 nsecs -= secs * NSEC_PER_SEC;
1608                 ret += fprintf(fp, " time %lu.%09llu", secs, nsecs);
1609         } else {
1610                 ret += fprintf(fp, " time 0");
1611         }
1612
1613         if (!e->fmt)
1614                 msg = (const char *)&e->time;
1615
1616         ret += fprintf(fp, " cpu %d pid %d tid %d ip %#"PRI_lx64" code %u: %s\n",
1617                        e->cpu, e->pid, e->tid, e->ip, e->code, msg);
1618         return ret;
1619 }
1620
1621 void perf_session__auxtrace_error_inc(struct perf_session *session,
1622                                       union perf_event *event)
1623 {
1624         struct perf_record_auxtrace_error *e = &event->auxtrace_error;
1625
1626         if (e->type < PERF_AUXTRACE_ERROR_MAX)
1627                 session->evlist->stats.nr_auxtrace_errors[e->type] += 1;
1628 }
1629
1630 void events_stats__auxtrace_error_warn(const struct events_stats *stats)
1631 {
1632         int i;
1633
1634         for (i = 0; i < PERF_AUXTRACE_ERROR_MAX; i++) {
1635                 if (!stats->nr_auxtrace_errors[i])
1636                         continue;
1637                 ui__warning("%u %s errors\n",
1638                             stats->nr_auxtrace_errors[i],
1639                             auxtrace_error_name(i));
1640         }
1641 }
1642
1643 int perf_event__process_auxtrace_error(struct perf_session *session,
1644                                        union perf_event *event)
1645 {
1646         if (auxtrace__dont_decode(session))
1647                 return 0;
1648
1649         perf_event__fprintf_auxtrace_error(event, stdout);
1650         return 0;
1651 }
1652
1653 static int __auxtrace_mmap__read(struct mmap *map,
1654                                  struct auxtrace_record *itr,
1655                                  struct perf_tool *tool, process_auxtrace_t fn,
1656                                  bool snapshot, size_t snapshot_size)
1657 {
1658         struct auxtrace_mmap *mm = &map->auxtrace_mmap;
1659         u64 head, old = mm->prev, offset, ref;
1660         unsigned char *data = mm->base;
1661         size_t size, head_off, old_off, len1, len2, padding;
1662         union perf_event ev;
1663         void *data1, *data2;
1664
1665         if (snapshot) {
1666                 head = auxtrace_mmap__read_snapshot_head(mm);
1667                 if (auxtrace_record__find_snapshot(itr, mm->idx, mm, data,
1668                                                    &head, &old))
1669                         return -1;
1670         } else {
1671                 head = auxtrace_mmap__read_head(mm);
1672         }
1673
1674         if (old == head)
1675                 return 0;
1676
1677         pr_debug3("auxtrace idx %d old %#"PRIx64" head %#"PRIx64" diff %#"PRIx64"\n",
1678                   mm->idx, old, head, head - old);
1679
1680         if (mm->mask) {
1681                 head_off = head & mm->mask;
1682                 old_off = old & mm->mask;
1683         } else {
1684                 head_off = head % mm->len;
1685                 old_off = old % mm->len;
1686         }
1687
1688         if (head_off > old_off)
1689                 size = head_off - old_off;
1690         else
1691                 size = mm->len - (old_off - head_off);
1692
1693         if (snapshot && size > snapshot_size)
1694                 size = snapshot_size;
1695
1696         ref = auxtrace_record__reference(itr);
1697
1698         if (head > old || size <= head || mm->mask) {
1699                 offset = head - size;
1700         } else {
1701                 /*
1702                  * When the buffer size is not a power of 2, 'head' wraps at the
1703                  * highest multiple of the buffer size, so we have to subtract
1704                  * the remainder here.
1705                  */
1706                 u64 rem = (0ULL - mm->len) % mm->len;
1707
1708                 offset = head - size - rem;
1709         }
1710
1711         if (size > head_off) {
1712                 len1 = size - head_off;
1713                 data1 = &data[mm->len - len1];
1714                 len2 = head_off;
1715                 data2 = &data[0];
1716         } else {
1717                 len1 = size;
1718                 data1 = &data[head_off - len1];
1719                 len2 = 0;
1720                 data2 = NULL;
1721         }
1722
1723         if (itr->alignment) {
1724                 unsigned int unwanted = len1 % itr->alignment;
1725
1726                 len1 -= unwanted;
1727                 size -= unwanted;
1728         }
1729
1730         /* padding must be written by fn() e.g. record__process_auxtrace() */
1731         padding = size & (PERF_AUXTRACE_RECORD_ALIGNMENT - 1);
1732         if (padding)
1733                 padding = PERF_AUXTRACE_RECORD_ALIGNMENT - padding;
1734
1735         memset(&ev, 0, sizeof(ev));
1736         ev.auxtrace.header.type = PERF_RECORD_AUXTRACE;
1737         ev.auxtrace.header.size = sizeof(ev.auxtrace);
1738         ev.auxtrace.size = size + padding;
1739         ev.auxtrace.offset = offset;
1740         ev.auxtrace.reference = ref;
1741         ev.auxtrace.idx = mm->idx;
1742         ev.auxtrace.tid = mm->tid;
1743         ev.auxtrace.cpu = mm->cpu;
1744
1745         if (fn(tool, map, &ev, data1, len1, data2, len2))
1746                 return -1;
1747
1748         mm->prev = head;
1749
1750         if (!snapshot) {
1751                 auxtrace_mmap__write_tail(mm, head);
1752                 if (itr->read_finish) {
1753                         int err;
1754
1755                         err = itr->read_finish(itr, mm->idx);
1756                         if (err < 0)
1757                                 return err;
1758                 }
1759         }
1760
1761         return 1;
1762 }
1763
1764 int auxtrace_mmap__read(struct mmap *map, struct auxtrace_record *itr,
1765                         struct perf_tool *tool, process_auxtrace_t fn)
1766 {
1767         return __auxtrace_mmap__read(map, itr, tool, fn, false, 0);
1768 }
1769
1770 int auxtrace_mmap__read_snapshot(struct mmap *map,
1771                                  struct auxtrace_record *itr,
1772                                  struct perf_tool *tool, process_auxtrace_t fn,
1773                                  size_t snapshot_size)
1774 {
1775         return __auxtrace_mmap__read(map, itr, tool, fn, true, snapshot_size);
1776 }
1777
1778 /**
1779  * struct auxtrace_cache - hash table to implement a cache
1780  * @hashtable: the hashtable
1781  * @sz: hashtable size (number of hlists)
1782  * @entry_size: size of an entry
1783  * @limit: limit the number of entries to this maximum, when reached the cache
1784  *         is dropped and caching begins again with an empty cache
1785  * @cnt: current number of entries
1786  * @bits: hashtable size (@sz = 2^@bits)
1787  */
1788 struct auxtrace_cache {
1789         struct hlist_head *hashtable;
1790         size_t sz;
1791         size_t entry_size;
1792         size_t limit;
1793         size_t cnt;
1794         unsigned int bits;
1795 };
1796
1797 struct auxtrace_cache *auxtrace_cache__new(unsigned int bits, size_t entry_size,
1798                                            unsigned int limit_percent)
1799 {
1800         struct auxtrace_cache *c;
1801         struct hlist_head *ht;
1802         size_t sz, i;
1803
1804         c = zalloc(sizeof(struct auxtrace_cache));
1805         if (!c)
1806                 return NULL;
1807
1808         sz = 1UL << bits;
1809
1810         ht = calloc(sz, sizeof(struct hlist_head));
1811         if (!ht)
1812                 goto out_free;
1813
1814         for (i = 0; i < sz; i++)
1815                 INIT_HLIST_HEAD(&ht[i]);
1816
1817         c->hashtable = ht;
1818         c->sz = sz;
1819         c->entry_size = entry_size;
1820         c->limit = (c->sz * limit_percent) / 100;
1821         c->bits = bits;
1822
1823         return c;
1824
1825 out_free:
1826         free(c);
1827         return NULL;
1828 }
1829
1830 static void auxtrace_cache__drop(struct auxtrace_cache *c)
1831 {
1832         struct auxtrace_cache_entry *entry;
1833         struct hlist_node *tmp;
1834         size_t i;
1835
1836         if (!c)
1837                 return;
1838
1839         for (i = 0; i < c->sz; i++) {
1840                 hlist_for_each_entry_safe(entry, tmp, &c->hashtable[i], hash) {
1841                         hlist_del(&entry->hash);
1842                         auxtrace_cache__free_entry(c, entry);
1843                 }
1844         }
1845
1846         c->cnt = 0;
1847 }
1848
1849 void auxtrace_cache__free(struct auxtrace_cache *c)
1850 {
1851         if (!c)
1852                 return;
1853
1854         auxtrace_cache__drop(c);
1855         zfree(&c->hashtable);
1856         free(c);
1857 }
1858
1859 void *auxtrace_cache__alloc_entry(struct auxtrace_cache *c)
1860 {
1861         return malloc(c->entry_size);
1862 }
1863
1864 void auxtrace_cache__free_entry(struct auxtrace_cache *c __maybe_unused,
1865                                 void *entry)
1866 {
1867         free(entry);
1868 }
1869
1870 int auxtrace_cache__add(struct auxtrace_cache *c, u32 key,
1871                         struct auxtrace_cache_entry *entry)
1872 {
1873         if (c->limit && ++c->cnt > c->limit)
1874                 auxtrace_cache__drop(c);
1875
1876         entry->key = key;
1877         hlist_add_head(&entry->hash, &c->hashtable[hash_32(key, c->bits)]);
1878
1879         return 0;
1880 }
1881
1882 static struct auxtrace_cache_entry *auxtrace_cache__rm(struct auxtrace_cache *c,
1883                                                        u32 key)
1884 {
1885         struct auxtrace_cache_entry *entry;
1886         struct hlist_head *hlist;
1887         struct hlist_node *n;
1888
1889         if (!c)
1890                 return NULL;
1891
1892         hlist = &c->hashtable[hash_32(key, c->bits)];
1893         hlist_for_each_entry_safe(entry, n, hlist, hash) {
1894                 if (entry->key == key) {
1895                         hlist_del(&entry->hash);
1896                         return entry;
1897                 }
1898         }
1899
1900         return NULL;
1901 }
1902
1903 void auxtrace_cache__remove(struct auxtrace_cache *c, u32 key)
1904 {
1905         struct auxtrace_cache_entry *entry = auxtrace_cache__rm(c, key);
1906
1907         auxtrace_cache__free_entry(c, entry);
1908 }
1909
1910 void *auxtrace_cache__lookup(struct auxtrace_cache *c, u32 key)
1911 {
1912         struct auxtrace_cache_entry *entry;
1913         struct hlist_head *hlist;
1914
1915         if (!c)
1916                 return NULL;
1917
1918         hlist = &c->hashtable[hash_32(key, c->bits)];
1919         hlist_for_each_entry(entry, hlist, hash) {
1920                 if (entry->key == key)
1921                         return entry;
1922         }
1923
1924         return NULL;
1925 }
1926
1927 static void addr_filter__free_str(struct addr_filter *filt)
1928 {
1929         zfree(&filt->str);
1930         filt->action   = NULL;
1931         filt->sym_from = NULL;
1932         filt->sym_to   = NULL;
1933         filt->filename = NULL;
1934 }
1935
1936 static struct addr_filter *addr_filter__new(void)
1937 {
1938         struct addr_filter *filt = zalloc(sizeof(*filt));
1939
1940         if (filt)
1941                 INIT_LIST_HEAD(&filt->list);
1942
1943         return filt;
1944 }
1945
1946 static void addr_filter__free(struct addr_filter *filt)
1947 {
1948         if (filt)
1949                 addr_filter__free_str(filt);
1950         free(filt);
1951 }
1952
1953 static void addr_filters__add(struct addr_filters *filts,
1954                               struct addr_filter *filt)
1955 {
1956         list_add_tail(&filt->list, &filts->head);
1957         filts->cnt += 1;
1958 }
1959
1960 static void addr_filters__del(struct addr_filters *filts,
1961                               struct addr_filter *filt)
1962 {
1963         list_del_init(&filt->list);
1964         filts->cnt -= 1;
1965 }
1966
1967 void addr_filters__init(struct addr_filters *filts)
1968 {
1969         INIT_LIST_HEAD(&filts->head);
1970         filts->cnt = 0;
1971 }
1972
1973 void addr_filters__exit(struct addr_filters *filts)
1974 {
1975         struct addr_filter *filt, *n;
1976
1977         list_for_each_entry_safe(filt, n, &filts->head, list) {
1978                 addr_filters__del(filts, filt);
1979                 addr_filter__free(filt);
1980         }
1981 }
1982
1983 static int parse_num_or_str(char **inp, u64 *num, const char **str,
1984                             const char *str_delim)
1985 {
1986         *inp += strspn(*inp, " ");
1987
1988         if (isdigit(**inp)) {
1989                 char *endptr;
1990
1991                 if (!num)
1992                         return -EINVAL;
1993                 errno = 0;
1994                 *num = strtoull(*inp, &endptr, 0);
1995                 if (errno)
1996                         return -errno;
1997                 if (endptr == *inp)
1998                         return -EINVAL;
1999                 *inp = endptr;
2000         } else {
2001                 size_t n;
2002
2003                 if (!str)
2004                         return -EINVAL;
2005                 *inp += strspn(*inp, " ");
2006                 *str = *inp;
2007                 n = strcspn(*inp, str_delim);
2008                 if (!n)
2009                         return -EINVAL;
2010                 *inp += n;
2011                 if (**inp) {
2012                         **inp = '\0';
2013                         *inp += 1;
2014                 }
2015         }
2016         return 0;
2017 }
2018
2019 static int parse_action(struct addr_filter *filt)
2020 {
2021         if (!strcmp(filt->action, "filter")) {
2022                 filt->start = true;
2023                 filt->range = true;
2024         } else if (!strcmp(filt->action, "start")) {
2025                 filt->start = true;
2026         } else if (!strcmp(filt->action, "stop")) {
2027                 filt->start = false;
2028         } else if (!strcmp(filt->action, "tracestop")) {
2029                 filt->start = false;
2030                 filt->range = true;
2031                 filt->action += 5; /* Change 'tracestop' to 'stop' */
2032         } else {
2033                 return -EINVAL;
2034         }
2035         return 0;
2036 }
2037
2038 static int parse_sym_idx(char **inp, int *idx)
2039 {
2040         *idx = -1;
2041
2042         *inp += strspn(*inp, " ");
2043
2044         if (**inp != '#')
2045                 return 0;
2046
2047         *inp += 1;
2048
2049         if (**inp == 'g' || **inp == 'G') {
2050                 *inp += 1;
2051                 *idx = 0;
2052         } else {
2053                 unsigned long num;
2054                 char *endptr;
2055
2056                 errno = 0;
2057                 num = strtoul(*inp, &endptr, 0);
2058                 if (errno)
2059                         return -errno;
2060                 if (endptr == *inp || num > INT_MAX)
2061                         return -EINVAL;
2062                 *inp = endptr;
2063                 *idx = num;
2064         }
2065
2066         return 0;
2067 }
2068
2069 static int parse_addr_size(char **inp, u64 *num, const char **str, int *idx)
2070 {
2071         int err = parse_num_or_str(inp, num, str, " ");
2072
2073         if (!err && *str)
2074                 err = parse_sym_idx(inp, idx);
2075
2076         return err;
2077 }
2078
2079 static int parse_one_filter(struct addr_filter *filt, const char **filter_inp)
2080 {
2081         char *fstr;
2082         int err;
2083
2084         filt->str = fstr = strdup(*filter_inp);
2085         if (!fstr)
2086                 return -ENOMEM;
2087
2088         err = parse_num_or_str(&fstr, NULL, &filt->action, " ");
2089         if (err)
2090                 goto out_err;
2091
2092         err = parse_action(filt);
2093         if (err)
2094                 goto out_err;
2095
2096         err = parse_addr_size(&fstr, &filt->addr, &filt->sym_from,
2097                               &filt->sym_from_idx);
2098         if (err)
2099                 goto out_err;
2100
2101         fstr += strspn(fstr, " ");
2102
2103         if (*fstr == '/') {
2104                 fstr += 1;
2105                 err = parse_addr_size(&fstr, &filt->size, &filt->sym_to,
2106                                       &filt->sym_to_idx);
2107                 if (err)
2108                         goto out_err;
2109                 filt->range = true;
2110         }
2111
2112         fstr += strspn(fstr, " ");
2113
2114         if (*fstr == '@') {
2115                 fstr += 1;
2116                 err = parse_num_or_str(&fstr, NULL, &filt->filename, " ,");
2117                 if (err)
2118                         goto out_err;
2119         }
2120
2121         fstr += strspn(fstr, " ,");
2122
2123         *filter_inp += fstr - filt->str;
2124
2125         return 0;
2126
2127 out_err:
2128         addr_filter__free_str(filt);
2129
2130         return err;
2131 }
2132
2133 int addr_filters__parse_bare_filter(struct addr_filters *filts,
2134                                     const char *filter)
2135 {
2136         struct addr_filter *filt;
2137         const char *fstr = filter;
2138         int err;
2139
2140         while (*fstr) {
2141                 filt = addr_filter__new();
2142                 err = parse_one_filter(filt, &fstr);
2143                 if (err) {
2144                         addr_filter__free(filt);
2145                         addr_filters__exit(filts);
2146                         return err;
2147                 }
2148                 addr_filters__add(filts, filt);
2149         }
2150
2151         return 0;
2152 }
2153
2154 struct sym_args {
2155         const char      *name;
2156         u64             start;
2157         u64             size;
2158         int             idx;
2159         int             cnt;
2160         bool            started;
2161         bool            global;
2162         bool            selected;
2163         bool            duplicate;
2164         bool            near;
2165 };
2166
2167 static bool kern_sym_name_match(const char *kname, const char *name)
2168 {
2169         size_t n = strlen(name);
2170
2171         return !strcmp(kname, name) ||
2172                (!strncmp(kname, name, n) && kname[n] == '\t');
2173 }
2174
2175 static bool kern_sym_match(struct sym_args *args, const char *name, char type)
2176 {
2177         /* A function with the same name, and global or the n'th found or any */
2178         return kallsyms__is_function(type) &&
2179                kern_sym_name_match(name, args->name) &&
2180                ((args->global && isupper(type)) ||
2181                 (args->selected && ++(args->cnt) == args->idx) ||
2182                 (!args->global && !args->selected));
2183 }
2184
2185 static int find_kern_sym_cb(void *arg, const char *name, char type, u64 start)
2186 {
2187         struct sym_args *args = arg;
2188
2189         if (args->started) {
2190                 if (!args->size)
2191                         args->size = start - args->start;
2192                 if (args->selected) {
2193                         if (args->size)
2194                                 return 1;
2195                 } else if (kern_sym_match(args, name, type)) {
2196                         args->duplicate = true;
2197                         return 1;
2198                 }
2199         } else if (kern_sym_match(args, name, type)) {
2200                 args->started = true;
2201                 args->start = start;
2202         }
2203
2204         return 0;
2205 }
2206
2207 static int print_kern_sym_cb(void *arg, const char *name, char type, u64 start)
2208 {
2209         struct sym_args *args = arg;
2210
2211         if (kern_sym_match(args, name, type)) {
2212                 pr_err("#%d\t0x%"PRIx64"\t%c\t%s\n",
2213                        ++args->cnt, start, type, name);
2214                 args->near = true;
2215         } else if (args->near) {
2216                 args->near = false;
2217                 pr_err("\t\twhich is near\t\t%s\n", name);
2218         }
2219
2220         return 0;
2221 }
2222
2223 static int sym_not_found_error(const char *sym_name, int idx)
2224 {
2225         if (idx > 0) {
2226                 pr_err("N'th occurrence (N=%d) of symbol '%s' not found.\n",
2227                        idx, sym_name);
2228         } else if (!idx) {
2229                 pr_err("Global symbol '%s' not found.\n", sym_name);
2230         } else {
2231                 pr_err("Symbol '%s' not found.\n", sym_name);
2232         }
2233         pr_err("Note that symbols must be functions.\n");
2234
2235         return -EINVAL;
2236 }
2237
2238 static int find_kern_sym(const char *sym_name, u64 *start, u64 *size, int idx)
2239 {
2240         struct sym_args args = {
2241                 .name = sym_name,
2242                 .idx = idx,
2243                 .global = !idx,
2244                 .selected = idx > 0,
2245         };
2246         int err;
2247
2248         *start = 0;
2249         *size = 0;
2250
2251         err = kallsyms__parse("/proc/kallsyms", &args, find_kern_sym_cb);
2252         if (err < 0) {
2253                 pr_err("Failed to parse /proc/kallsyms\n");
2254                 return err;
2255         }
2256
2257         if (args.duplicate) {
2258                 pr_err("Multiple kernel symbols with name '%s'\n", sym_name);
2259                 args.cnt = 0;
2260                 kallsyms__parse("/proc/kallsyms", &args, print_kern_sym_cb);
2261                 pr_err("Disambiguate symbol name by inserting #n after the name e.g. %s #2\n",
2262                        sym_name);
2263                 pr_err("Or select a global symbol by inserting #0 or #g or #G\n");
2264                 return -EINVAL;
2265         }
2266
2267         if (!args.started) {
2268                 pr_err("Kernel symbol lookup: ");
2269                 return sym_not_found_error(sym_name, idx);
2270         }
2271
2272         *start = args.start;
2273         *size = args.size;
2274
2275         return 0;
2276 }
2277
2278 static int find_entire_kern_cb(void *arg, const char *name __maybe_unused,
2279                                char type, u64 start)
2280 {
2281         struct sym_args *args = arg;
2282         u64 size;
2283
2284         if (!kallsyms__is_function(type))
2285                 return 0;
2286
2287         if (!args->started) {
2288                 args->started = true;
2289                 args->start = start;
2290         }
2291         /* Don't know exactly where the kernel ends, so we add a page */
2292         size = round_up(start, page_size) + page_size - args->start;
2293         if (size > args->size)
2294                 args->size = size;
2295
2296         return 0;
2297 }
2298
2299 static int addr_filter__entire_kernel(struct addr_filter *filt)
2300 {
2301         struct sym_args args = { .started = false };
2302         int err;
2303
2304         err = kallsyms__parse("/proc/kallsyms", &args, find_entire_kern_cb);
2305         if (err < 0 || !args.started) {
2306                 pr_err("Failed to parse /proc/kallsyms\n");
2307                 return err;
2308         }
2309
2310         filt->addr = args.start;
2311         filt->size = args.size;
2312
2313         return 0;
2314 }
2315
2316 static int check_end_after_start(struct addr_filter *filt, u64 start, u64 size)
2317 {
2318         if (start + size >= filt->addr)
2319                 return 0;
2320
2321         if (filt->sym_from) {
2322                 pr_err("Symbol '%s' (0x%"PRIx64") comes before '%s' (0x%"PRIx64")\n",
2323                        filt->sym_to, start, filt->sym_from, filt->addr);
2324         } else {
2325                 pr_err("Symbol '%s' (0x%"PRIx64") comes before address 0x%"PRIx64")\n",
2326                        filt->sym_to, start, filt->addr);
2327         }
2328
2329         return -EINVAL;
2330 }
2331
2332 static int addr_filter__resolve_kernel_syms(struct addr_filter *filt)
2333 {
2334         bool no_size = false;
2335         u64 start, size;
2336         int err;
2337
2338         if (symbol_conf.kptr_restrict) {
2339                 pr_err("Kernel addresses are restricted. Unable to resolve kernel symbols.\n");
2340                 return -EINVAL;
2341         }
2342
2343         if (filt->sym_from && !strcmp(filt->sym_from, "*"))
2344                 return addr_filter__entire_kernel(filt);
2345
2346         if (filt->sym_from) {
2347                 err = find_kern_sym(filt->sym_from, &start, &size,
2348                                     filt->sym_from_idx);
2349                 if (err)
2350                         return err;
2351                 filt->addr = start;
2352                 if (filt->range && !filt->size && !filt->sym_to) {
2353                         filt->size = size;
2354                         no_size = !size;
2355                 }
2356         }
2357
2358         if (filt->sym_to) {
2359                 err = find_kern_sym(filt->sym_to, &start, &size,
2360                                     filt->sym_to_idx);
2361                 if (err)
2362                         return err;
2363
2364                 err = check_end_after_start(filt, start, size);
2365                 if (err)
2366                         return err;
2367                 filt->size = start + size - filt->addr;
2368                 no_size = !size;
2369         }
2370
2371         /* The very last symbol in kallsyms does not imply a particular size */
2372         if (no_size) {
2373                 pr_err("Cannot determine size of symbol '%s'\n",
2374                        filt->sym_to ? filt->sym_to : filt->sym_from);
2375                 return -EINVAL;
2376         }
2377
2378         return 0;
2379 }
2380
2381 static struct dso *load_dso(const char *name)
2382 {
2383         struct map *map;
2384         struct dso *dso;
2385
2386         map = dso__new_map(name);
2387         if (!map)
2388                 return NULL;
2389
2390         if (map__load(map) < 0)
2391                 pr_err("File '%s' not found or has no symbols.\n", name);
2392
2393         dso = dso__get(map->dso);
2394
2395         map__put(map);
2396
2397         return dso;
2398 }
2399
2400 static bool dso_sym_match(struct symbol *sym, const char *name, int *cnt,
2401                           int idx)
2402 {
2403         /* Same name, and global or the n'th found or any */
2404         return !arch__compare_symbol_names(name, sym->name) &&
2405                ((!idx && sym->binding == STB_GLOBAL) ||
2406                 (idx > 0 && ++*cnt == idx) ||
2407                 idx < 0);
2408 }
2409
2410 static void print_duplicate_syms(struct dso *dso, const char *sym_name)
2411 {
2412         struct symbol *sym;
2413         bool near = false;
2414         int cnt = 0;
2415
2416         pr_err("Multiple symbols with name '%s'\n", sym_name);
2417
2418         sym = dso__first_symbol(dso);
2419         while (sym) {
2420                 if (dso_sym_match(sym, sym_name, &cnt, -1)) {
2421                         pr_err("#%d\t0x%"PRIx64"\t%c\t%s\n",
2422                                ++cnt, sym->start,
2423                                sym->binding == STB_GLOBAL ? 'g' :
2424                                sym->binding == STB_LOCAL  ? 'l' : 'w',
2425                                sym->name);
2426                         near = true;
2427                 } else if (near) {
2428                         near = false;
2429                         pr_err("\t\twhich is near\t\t%s\n", sym->name);
2430                 }
2431                 sym = dso__next_symbol(sym);
2432         }
2433
2434         pr_err("Disambiguate symbol name by inserting #n after the name e.g. %s #2\n",
2435                sym_name);
2436         pr_err("Or select a global symbol by inserting #0 or #g or #G\n");
2437 }
2438
2439 static int find_dso_sym(struct dso *dso, const char *sym_name, u64 *start,
2440                         u64 *size, int idx)
2441 {
2442         struct symbol *sym;
2443         int cnt = 0;
2444
2445         *start = 0;
2446         *size = 0;
2447
2448         sym = dso__first_symbol(dso);
2449         while (sym) {
2450                 if (*start) {
2451                         if (!*size)
2452                                 *size = sym->start - *start;
2453                         if (idx > 0) {
2454                                 if (*size)
2455                                         return 0;
2456                         } else if (dso_sym_match(sym, sym_name, &cnt, idx)) {
2457                                 print_duplicate_syms(dso, sym_name);
2458                                 return -EINVAL;
2459                         }
2460                 } else if (dso_sym_match(sym, sym_name, &cnt, idx)) {
2461                         *start = sym->start;
2462                         *size = sym->end - sym->start;
2463                 }
2464                 sym = dso__next_symbol(sym);
2465         }
2466
2467         if (!*start)
2468                 return sym_not_found_error(sym_name, idx);
2469
2470         return 0;
2471 }
2472
2473 static int addr_filter__entire_dso(struct addr_filter *filt, struct dso *dso)
2474 {
2475         if (dso__data_file_size(dso, NULL)) {
2476                 pr_err("Failed to determine filter for %s\nCannot determine file size.\n",
2477                        filt->filename);
2478                 return -EINVAL;
2479         }
2480
2481         filt->addr = 0;
2482         filt->size = dso->data.file_size;
2483
2484         return 0;
2485 }
2486
2487 static int addr_filter__resolve_syms(struct addr_filter *filt)
2488 {
2489         u64 start, size;
2490         struct dso *dso;
2491         int err = 0;
2492
2493         if (!filt->sym_from && !filt->sym_to)
2494                 return 0;
2495
2496         if (!filt->filename)
2497                 return addr_filter__resolve_kernel_syms(filt);
2498
2499         dso = load_dso(filt->filename);
2500         if (!dso) {
2501                 pr_err("Failed to load symbols from: %s\n", filt->filename);
2502                 return -EINVAL;
2503         }
2504
2505         if (filt->sym_from && !strcmp(filt->sym_from, "*")) {
2506                 err = addr_filter__entire_dso(filt, dso);
2507                 goto put_dso;
2508         }
2509
2510         if (filt->sym_from) {
2511                 err = find_dso_sym(dso, filt->sym_from, &start, &size,
2512                                    filt->sym_from_idx);
2513                 if (err)
2514                         goto put_dso;
2515                 filt->addr = start;
2516                 if (filt->range && !filt->size && !filt->sym_to)
2517                         filt->size = size;
2518         }
2519
2520         if (filt->sym_to) {
2521                 err = find_dso_sym(dso, filt->sym_to, &start, &size,
2522                                    filt->sym_to_idx);
2523                 if (err)
2524                         goto put_dso;
2525
2526                 err = check_end_after_start(filt, start, size);
2527                 if (err)
2528                         return err;
2529
2530                 filt->size = start + size - filt->addr;
2531         }
2532
2533 put_dso:
2534         dso__put(dso);
2535
2536         return err;
2537 }
2538
2539 static char *addr_filter__to_str(struct addr_filter *filt)
2540 {
2541         char filename_buf[PATH_MAX];
2542         const char *at = "";
2543         const char *fn = "";
2544         char *filter;
2545         int err;
2546
2547         if (filt->filename) {
2548                 at = "@";
2549                 fn = realpath(filt->filename, filename_buf);
2550                 if (!fn)
2551                         return NULL;
2552         }
2553
2554         if (filt->range) {
2555                 err = asprintf(&filter, "%s 0x%"PRIx64"/0x%"PRIx64"%s%s",
2556                                filt->action, filt->addr, filt->size, at, fn);
2557         } else {
2558                 err = asprintf(&filter, "%s 0x%"PRIx64"%s%s",
2559                                filt->action, filt->addr, at, fn);
2560         }
2561
2562         return err < 0 ? NULL : filter;
2563 }
2564
2565 static int parse_addr_filter(struct evsel *evsel, const char *filter,
2566                              int max_nr)
2567 {
2568         struct addr_filters filts;
2569         struct addr_filter *filt;
2570         int err;
2571
2572         addr_filters__init(&filts);
2573
2574         err = addr_filters__parse_bare_filter(&filts, filter);
2575         if (err)
2576                 goto out_exit;
2577
2578         if (filts.cnt > max_nr) {
2579                 pr_err("Error: number of address filters (%d) exceeds maximum (%d)\n",
2580                        filts.cnt, max_nr);
2581                 err = -EINVAL;
2582                 goto out_exit;
2583         }
2584
2585         list_for_each_entry(filt, &filts.head, list) {
2586                 char *new_filter;
2587
2588                 err = addr_filter__resolve_syms(filt);
2589                 if (err)
2590                         goto out_exit;
2591
2592                 new_filter = addr_filter__to_str(filt);
2593                 if (!new_filter) {
2594                         err = -ENOMEM;
2595                         goto out_exit;
2596                 }
2597
2598                 if (evsel__append_addr_filter(evsel, new_filter)) {
2599                         err = -ENOMEM;
2600                         goto out_exit;
2601                 }
2602         }
2603
2604 out_exit:
2605         addr_filters__exit(&filts);
2606
2607         if (err) {
2608                 pr_err("Failed to parse address filter: '%s'\n", filter);
2609                 pr_err("Filter format is: filter|start|stop|tracestop <start symbol or address> [/ <end symbol or size>] [@<file name>]\n");
2610                 pr_err("Where multiple filters are separated by space or comma.\n");
2611         }
2612
2613         return err;
2614 }
2615
2616 static int evsel__nr_addr_filter(struct evsel *evsel)
2617 {
2618         struct perf_pmu *pmu = evsel__find_pmu(evsel);
2619         int nr_addr_filters = 0;
2620
2621         if (!pmu)
2622                 return 0;
2623
2624         perf_pmu__scan_file(pmu, "nr_addr_filters", "%d", &nr_addr_filters);
2625
2626         return nr_addr_filters;
2627 }
2628
2629 int auxtrace_parse_filters(struct evlist *evlist)
2630 {
2631         struct evsel *evsel;
2632         char *filter;
2633         int err, max_nr;
2634
2635         evlist__for_each_entry(evlist, evsel) {
2636                 filter = evsel->filter;
2637                 max_nr = evsel__nr_addr_filter(evsel);
2638                 if (!filter || !max_nr)
2639                         continue;
2640                 evsel->filter = NULL;
2641                 err = parse_addr_filter(evsel, filter, max_nr);
2642                 free(filter);
2643                 if (err)
2644                         return err;
2645                 pr_debug("Address filter: %s\n", evsel->filter);
2646         }
2647
2648         return 0;
2649 }
2650
2651 int auxtrace__process_event(struct perf_session *session, union perf_event *event,
2652                             struct perf_sample *sample, struct perf_tool *tool)
2653 {
2654         if (!session->auxtrace)
2655                 return 0;
2656
2657         return session->auxtrace->process_event(session, event, sample, tool);
2658 }
2659
2660 void auxtrace__dump_auxtrace_sample(struct perf_session *session,
2661                                     struct perf_sample *sample)
2662 {
2663         if (!session->auxtrace || !session->auxtrace->dump_auxtrace_sample ||
2664             auxtrace__dont_decode(session))
2665                 return;
2666
2667         session->auxtrace->dump_auxtrace_sample(session, sample);
2668 }
2669
2670 int auxtrace__flush_events(struct perf_session *session, struct perf_tool *tool)
2671 {
2672         if (!session->auxtrace)
2673                 return 0;
2674
2675         return session->auxtrace->flush_events(session, tool);
2676 }
2677
2678 void auxtrace__free_events(struct perf_session *session)
2679 {
2680         if (!session->auxtrace)
2681                 return;
2682
2683         return session->auxtrace->free_events(session);
2684 }
2685
2686 void auxtrace__free(struct perf_session *session)
2687 {
2688         if (!session->auxtrace)
2689                 return;
2690
2691         return session->auxtrace->free(session);
2692 }
2693
2694 bool auxtrace__evsel_is_auxtrace(struct perf_session *session,
2695                                  struct evsel *evsel)
2696 {
2697         if (!session->auxtrace || !session->auxtrace->evsel_is_auxtrace)
2698                 return false;
2699
2700         return session->auxtrace->evsel_is_auxtrace(session, evsel);
2701 }