1 //===-- asan_stats.cc -------------------------------------------*- C++ -*-===//
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
21 namespace __asan {
22
AsanStats()23 AsanStats::AsanStats() {
24 CHECK(REAL(memset) != NULL);
25 REAL(memset)(this, 0, sizeof(AsanStats));
26 }
27
PrintMallocStatsArray(const char * prefix,size_t (& array)[kNumberOfSizeClasses])28 static void PrintMallocStatsArray(const char *prefix,
29 size_t (&array)[kNumberOfSizeClasses]) {
30 Printf("%s", prefix);
31 for (size_t i = 0; i < kNumberOfSizeClasses; i++) {
32 if (!array[i]) continue;
33 Printf("%zu:%zu; ", i, array[i]);
34 }
35 Printf("\n");
36 }
37
Print()38 void 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
56 static AsanLock print_lock(LINKER_INITIALIZED);
57
PrintAccumulatedStats()58 static 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
68 using namespace __asan; // NOLINT
69
__asan_get_current_allocated_bytes()70 size_t __asan_get_current_allocated_bytes() {
71 return asanThreadRegistry().GetCurrentAllocatedBytes();
72 }
73
__asan_get_heap_size()74 size_t __asan_get_heap_size() {
75 return asanThreadRegistry().GetHeapSize();
76 }
77
__asan_get_free_bytes()78 size_t __asan_get_free_bytes() {
79 return asanThreadRegistry().GetFreeBytes();
80 }
81
__asan_get_unmapped_bytes()82 size_t __asan_get_unmapped_bytes() {
83 return 0;
84 }
85
__asan_print_accumulated_stats()86 void __asan_print_accumulated_stats() {
87 PrintAccumulatedStats();
88 }
89