libsanitizer/asan/asan_stats.cc

   1 //===-- asan_stats.cc -----------------------------------------------------===//
   2 //
   3 // This file is distributed under the University of Illinois Open Source
   4 // License. See LICENSE.TXT for details.
   5 //
   6 //===----------------------------------------------------------------------===//
   7 //
   8 // This file is a part of AddressSanitizer, an address sanity checker.
   9 //
  10 // Code related to statistics collected by AddressSanitizer.
  11 //===----------------------------------------------------------------------===//
  12 #include "asan_interceptors.h"
  13 #include "asan_internal.h"
  14 #include "asan_lock.h"
  15 #include "asan_stats.h"
  16 #include "asan_thread_registry.h"
  17 #include "sanitizer/asan_interface.h"
  18
  19 namespace __asan {
  20
  21 AsanStats::AsanStats() {
  22   CHECK(REAL(memset) != 0);
  23   REAL(memset)(this, 0, sizeof(AsanStats));
  24 }
  25
  26 static void PrintMallocStatsArray(const char *prefix,
  27                                   uptr (&array)[kNumberOfSizeClasses]) {
  28   Printf("%s", prefix);
  29   for (uptr i = 0; i < kNumberOfSizeClasses; i++) {
  30     if (!array[i]) continue;
  31     Printf("%zu:%zu; ", i, array[i]);
  32   }
  33   Printf("\n");
  34 }
  35
  36 void AsanStats::Print() {
  37   Printf("Stats: %zuM malloced (%zuM for red zones) by %zu calls\n",
  38              malloced>>20, malloced_redzones>>20, mallocs);
  39   Printf("Stats: %zuM realloced by %zu calls\n", realloced>>20, reallocs);
  40   Printf("Stats: %zuM freed by %zu calls\n", freed>>20, frees);
  41   Printf("Stats: %zuM really freed by %zu calls\n",
  42              really_freed>>20, real_frees);
  43   Printf("Stats: %zuM (%zu full pages) mmaped in %zu calls\n",
  44              mmaped>>20, mmaped / kPageSize, mmaps);
  45
  46   PrintMallocStatsArray("  mmaps   by size class: ", mmaped_by_size);
  47   PrintMallocStatsArray("  mallocs by size class: ", malloced_by_size);
  48   PrintMallocStatsArray("  frees   by size class: ", freed_by_size);
  49   PrintMallocStatsArray("  rfrees  by size class: ", really_freed_by_size);
  50   Printf("Stats: malloc large: %zu small slow: %zu\n",
  51              malloc_large, malloc_small_slow);
  52 }
  53
  54 static AsanLock print_lock(LINKER_INITIALIZED);
  55
  56 static void PrintAccumulatedStats() {
  57   AsanStats stats = asanThreadRegistry().GetAccumulatedStats();
  58   // Use lock to keep reports from mixing up.
  59   ScopedLock lock(&print_lock);
  60   stats.Print();
  61 }
  62
  63 }  // namespace __asan
  64
  65 // ---------------------- Interface ---------------- {{{1
  66 using namespace __asan;  // NOLINT
  67
  68 uptr __asan_get_current_allocated_bytes() {
  69   return asanThreadRegistry().GetCurrentAllocatedBytes();
  70 }
  71
  72 uptr __asan_get_heap_size() {
  73   return asanThreadRegistry().GetHeapSize();
  74 }
  75
  76 uptr __asan_get_free_bytes() {
  77   return asanThreadRegistry().GetFreeBytes();
  78 }
  79
  80 uptr __asan_get_unmapped_bytes() {
  81   return 0;
  82 }
  83
  84 void __asan_print_accumulated_stats() {
  85   PrintAccumulatedStats();
  86 }