asan_stats.cc revision 84f5bacaf1021b9fb6fc2cf48abe5d4d416422ef 
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_lock.h"
17#include "asan_stats.h"
18#include "asan_thread_registry.h"
19#include "sanitizer/asan_interface.h"
20
21namespace __asan {
22
23AsanStats::AsanStats() {
24  CHECK(REAL(memset) != 0);
25  REAL(memset)(this, 0, sizeof(AsanStats));
26}
27
28static void PrintMallocStatsArray(const char *prefix,
29                                  uptr (&array)[kNumberOfSizeClasses]) {
30  Printf("%s", prefix);
31  for (uptr i = 0; i < kNumberOfSizeClasses; i++) {
32    if (!array[i]) continue;
33    Printf("%zu:%zu; ", i, array[i]);
34  }
35  Printf("\n");
36}
37
38void AsanStats::Print() {
39  Printf("Stats: %zuM malloced (%zuM for red zones) by %zu calls\n",
40             malloced>>20, malloced_redzones>>20, mallocs);
41  Printf("Stats: %zuM realloced by %zu calls\n", realloced>>20, reallocs);
42  Printf("Stats: %zuM freed by %zu calls\n", freed>>20, frees);
43  Printf("Stats: %zuM really freed by %zu calls\n",
44             really_freed>>20, real_frees);
45  Printf("Stats: %zuM (%zu full pages) mmaped in %zu calls\n",
46             mmaped>>20, mmaped / kPageSize, mmaps);
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 AsanLock 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  ScopedLock lock(&print_lock);
63  stats.Print();
64}
65
66}  // namespace __asan
67
68// ---------------------- Interface ---------------- {{{1
69using namespace __asan;  // NOLINT
70
71uptr __asan_get_current_allocated_bytes() {
72  return asanThreadRegistry().GetCurrentAllocatedBytes();
73}
74
75uptr __asan_get_heap_size() {
76  return asanThreadRegistry().GetHeapSize();
77}
78
79uptr __asan_get_free_bytes() {
80  return asanThreadRegistry().GetFreeBytes();
81}
82
83uptr __asan_get_unmapped_bytes() {
84  return 0;
85}
86
87void __asan_print_accumulated_stats() {
88  PrintAccumulatedStats();
89}
90