asan_stats.cc revision e5f5895bda30f374b0b51412fd4d837fa59aed66 
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_interface.h"
16#include "asan_internal.h"
17#include "asan_lock.h"
18#include "asan_stats.h"
19#include "asan_thread_registry.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 = asanThreadRegistry().GetAccumulatedStats();
60  // Use lock to keep reports from mixing up.
61  ScopedLock lock(&print_lock);
62  stats.Print();
63}
64
65}  // namespace __asan
66
67// ---------------------- Interface ---------------- {{{1
68using namespace __asan;  // NOLINT
69
70uptr __asan_get_current_allocated_bytes() {
71  return asanThreadRegistry().GetCurrentAllocatedBytes();
72}
73
74uptr __asan_get_heap_size() {
75  return asanThreadRegistry().GetHeapSize();
76}
77
78uptr __asan_get_free_bytes() {
79  return asanThreadRegistry().GetFreeBytes();
80}
81
82uptr __asan_get_unmapped_bytes() {
83  return 0;
84}
85
86void __asan_print_accumulated_stats() {
87  PrintAccumulatedStats();
88}
89