asan_stats.cc revision c70fa28caaaec2134f2c2230821fcc0f0d7ac27e 
1//===-- asan_stats.cc -----------------------------------------------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file is a part of AddressSanitizer, an address sanity checker.
11//
12// Code related to statistics collected by AddressSanitizer.
13//===----------------------------------------------------------------------===//
14#include "asan_interceptors.h"
15#include "asan_internal.h"
16#include "asan_stats.h"
17#include "asan_thread_registry.h"
18#include "sanitizer_common/sanitizer_stackdepot.h"
19
20namespace __asan {
21
22AsanStats::AsanStats() {
23  CHECK(REAL(memset) != 0);
24  REAL(memset)(this, 0, sizeof(AsanStats));
25}
26
27static void PrintMallocStatsArray(const char *prefix,
28                                  uptr (&array)[kNumberOfSizeClasses]) {
29  Printf("%s", prefix);
30  for (uptr i = 0; i < kNumberOfSizeClasses; i++) {
31    if (!array[i]) continue;
32    Printf("%zu:%zu; ", i, array[i]);
33  }
34  Printf("\n");
35}
36
37void AsanStats::Print() {
38  Printf("Stats: %zuM malloced (%zuM for red zones) by %zu calls\n",
39             malloced>>20, malloced_redzones>>20, mallocs);
40  Printf("Stats: %zuM realloced by %zu calls\n", realloced>>20, reallocs);
41  Printf("Stats: %zuM freed by %zu calls\n", freed>>20, frees);
42  Printf("Stats: %zuM really freed by %zu calls\n",
43             really_freed>>20, real_frees);
44  Printf("Stats: %zuM (%zuM-%zuM) mmaped; %zu maps, %zu unmaps\n",
45             (mmaped-munmaped)>>20, mmaped>>20, munmaped>>20,
46             mmaps, munmaps);
47
48  PrintMallocStatsArray("  mmaps   by size class: ", mmaped_by_size);
49  PrintMallocStatsArray("  mallocs by size class: ", malloced_by_size);
50  PrintMallocStatsArray("  frees   by size class: ", freed_by_size);
51  PrintMallocStatsArray("  rfrees  by size class: ", really_freed_by_size);
52  Printf("Stats: malloc large: %zu small slow: %zu\n",
53             malloc_large, malloc_small_slow);
54}
55
56static BlockingMutex print_lock(LINKER_INITIALIZED);
57
58static void PrintAccumulatedStats() {
59  AsanStats stats;
60  asanThreadRegistry().GetAccumulatedStats(&stats);
61  // Use lock to keep reports from mixing up.
62  BlockingMutexLock lock(&print_lock);
63  stats.Print();
64  StackDepotStats *stack_depot_stats = StackDepotGetStats();
65  Printf("Stats: StackDepot: %zd ids; %zdM mapped\n",
66         stack_depot_stats->n_uniq_ids, stack_depot_stats->mapped >> 20);
67  PrintInternalAllocatorStats();
68}
69
70}  // namespace __asan
71
72// ---------------------- Interface ---------------- {{{1
73using namespace __asan;  // NOLINT
74
75uptr __asan_get_current_allocated_bytes() {
76  return asanThreadRegistry().GetCurrentAllocatedBytes();
77}
78
79uptr __asan_get_heap_size() {
80  return asanThreadRegistry().GetHeapSize();
81}
82
83uptr __asan_get_free_bytes() {
84  return asanThreadRegistry().GetFreeBytes();
85}
86
87uptr __asan_get_unmapped_bytes() {
88  return 0;
89}
90
91void __asan_print_accumulated_stats() {
92  PrintAccumulatedStats();
93}
94