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