• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
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