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_stats.h"
  15 #include "asan_thread_registry.h"
  16 #include "sanitizer_common/sanitizer_stackdepot.h"
  17
  18 namespace __asan {
  19
  20 AsanStats::AsanStats() {
  21   CHECK(REAL(memset) != 0);
  22   REAL(memset)(this, 0, sizeof(AsanStats));
  23 }
  24
  25 static void PrintMallocStatsArray(const char *prefix,
  26                                   uptr (&array)[kNumberOfSizeClasses]) {
  27   Printf("%s", prefix);
  28   for (uptr i = 0; i < kNumberOfSizeClasses; i++) {
  29     if (!array[i]) continue;
  30     Printf("%zu:%zu; ", i, array[i]);
  31   }
  32   Printf("\n");
  33 }
  34
  35 void AsanStats::Print() {
  36   Printf("Stats: %zuM malloced (%zuM for red zones) by %zu calls\n",
  37              malloced>>20, malloced_redzones>>20, mallocs);
  38   Printf("Stats: %zuM realloced by %zu calls\n", realloced>>20, reallocs);
  39   Printf("Stats: %zuM freed by %zu calls\n", freed>>20, frees);
  40   Printf("Stats: %zuM really freed by %zu calls\n",
  41              really_freed>>20, real_frees);
  42   Printf("Stats: %zuM (%zuM-%zuM) mmaped; %zu maps, %zu unmaps\n",
  43              (mmaped-munmaped)>>20, mmaped>>20, munmaped>>20,
  44              mmaps, munmaps);
  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 BlockingMutex print_lock(LINKER_INITIALIZED);
  55
  56 static void PrintAccumulatedStats() {
  57   AsanStats stats;
  58   asanThreadRegistry().GetAccumulatedStats(&stats);
  59   // Use lock to keep reports from mixing up.
  60   BlockingMutexLock lock(&print_lock);
  61   stats.Print();
  62   StackDepotStats *stack_depot_stats = StackDepotGetStats();
  63   Printf("Stats: StackDepot: %zd ids; %zdM mapped\n",
  64          stack_depot_stats->n_uniq_ids, stack_depot_stats->mapped >> 20);
  65   PrintInternalAllocatorStats();
  66 }
  67
  68 }  // namespace __asan
  69
  70 // ---------------------- Interface ---------------- {{{1
  71 using namespace __asan;  // NOLINT
  72
  73 uptr __asan_get_current_allocated_bytes() {
  74   return asanThreadRegistry().GetCurrentAllocatedBytes();
  75 }
  76
  77 uptr __asan_get_heap_size() {
  78   return asanThreadRegistry().GetHeapSize();
  79 }
  80
  81 uptr __asan_get_free_bytes() {
  82   return asanThreadRegistry().GetFreeBytes();
  83 }
  84
  85 uptr __asan_get_unmapped_bytes() {
  86   return 0;
  87 }
  88
  89 void __asan_print_accumulated_stats() {
  90   PrintAccumulatedStats();
  91 }