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
20 namespace __asan {
21
AsanStats()22 AsanStats::AsanStats() {
23 CHECK(REAL(memset) != 0);
24 REAL(memset)(this, 0, sizeof(AsanStats));
25 }
26
PrintMallocStatsArray(const char * prefix,uptr (& array)[kNumberOfSizeClasses])27 static 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
Print()37 void 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
56 static BlockingMutex print_lock(LINKER_INITIALIZED);
57
PrintAccumulatedStats()58 static 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
73 using namespace __asan; // NOLINT
74
__asan_get_current_allocated_bytes()75 uptr __asan_get_current_allocated_bytes() {
76 return asanThreadRegistry().GetCurrentAllocatedBytes();
77 }
78
__asan_get_heap_size()79 uptr __asan_get_heap_size() {
80 return asanThreadRegistry().GetHeapSize();
81 }
82
__asan_get_free_bytes()83 uptr __asan_get_free_bytes() {
84 return asanThreadRegistry().GetFreeBytes();
85 }
86
__asan_get_unmapped_bytes()87 uptr __asan_get_unmapped_bytes() {
88 return 0;
89 }
90
__asan_print_accumulated_stats()91 void __asan_print_accumulated_stats() {
92 PrintAccumulatedStats();
93 }
94