asan_allocator.h revision 244384d1a8a518c0b1ceaa5809333a91db1104b6
1//===-- asan_allocator.h ----------------------------------------*- 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// ASan-private header for asan_allocator2.cc. 13//===----------------------------------------------------------------------===// 14 15#ifndef ASAN_ALLOCATOR_H 16#define ASAN_ALLOCATOR_H 17 18#include "asan_internal.h" 19#include "asan_interceptors.h" 20#include "sanitizer_common/sanitizer_list.h" 21 22namespace __asan { 23 24enum AllocType { 25 FROM_MALLOC = 1, // Memory block came from malloc, calloc, realloc, etc. 26 FROM_NEW = 2, // Memory block came from operator new. 27 FROM_NEW_BR = 3 // Memory block came from operator new [ ] 28}; 29 30static const uptr kNumberOfSizeClasses = 255; 31struct AsanChunk; 32 33void InitializeAllocator(); 34 35class AsanChunkView { 36 public: 37 explicit AsanChunkView(AsanChunk *chunk) : chunk_(chunk) {} 38 bool IsValid() { return chunk_ != 0; } 39 uptr Beg(); // first byte of user memory. 40 uptr End(); // last byte of user memory. 41 uptr UsedSize(); // size requested by the user. 42 uptr AllocTid(); 43 uptr FreeTid(); 44 void GetAllocStack(StackTrace *stack); 45 void GetFreeStack(StackTrace *stack); 46 bool AddrIsInside(uptr addr, uptr access_size, sptr *offset) { 47 if (addr >= Beg() && (addr + access_size) <= End()) { 48 *offset = addr - Beg(); 49 return true; 50 } 51 return false; 52 } 53 bool AddrIsAtLeft(uptr addr, uptr access_size, sptr *offset) { 54 (void)access_size; 55 if (addr < Beg()) { 56 *offset = Beg() - addr; 57 return true; 58 } 59 return false; 60 } 61 bool AddrIsAtRight(uptr addr, uptr access_size, sptr *offset) { 62 if (addr + access_size > End()) { 63 *offset = addr - End(); 64 return true; 65 } 66 return false; 67 } 68 69 private: 70 AsanChunk *const chunk_; 71}; 72 73AsanChunkView FindHeapChunkByAddress(uptr address); 74 75// List of AsanChunks with total size. 76class AsanChunkFifoList: public IntrusiveList<AsanChunk> { 77 public: 78 explicit AsanChunkFifoList(LinkerInitialized) { } 79 AsanChunkFifoList() { clear(); } 80 void Push(AsanChunk *n); 81 void PushList(AsanChunkFifoList *q); 82 AsanChunk *Pop(); 83 uptr size() { return size_; } 84 void clear() { 85 IntrusiveList<AsanChunk>::clear(); 86 size_ = 0; 87 } 88 private: 89 uptr size_; 90}; 91 92struct AsanThreadLocalMallocStorage { 93 explicit AsanThreadLocalMallocStorage(LinkerInitialized x) 94 { } 95 AsanThreadLocalMallocStorage() { 96 CHECK(REAL(memset)); 97 REAL(memset)(this, 0, sizeof(AsanThreadLocalMallocStorage)); 98 } 99 100 uptr quarantine_cache[16]; 101 uptr allocator2_cache[96 * (512 * 8 + 16)]; // Opaque. 102 void CommitBack(); 103}; 104 105void *asan_memalign(uptr alignment, uptr size, StackTrace *stack, 106 AllocType alloc_type); 107void asan_free(void *ptr, StackTrace *stack, AllocType alloc_type); 108 109void *asan_malloc(uptr size, StackTrace *stack); 110void *asan_calloc(uptr nmemb, uptr size, StackTrace *stack); 111void *asan_realloc(void *p, uptr size, StackTrace *stack); 112void *asan_valloc(uptr size, StackTrace *stack); 113void *asan_pvalloc(uptr size, StackTrace *stack); 114 115int asan_posix_memalign(void **memptr, uptr alignment, uptr size, 116 StackTrace *stack); 117uptr asan_malloc_usable_size(void *ptr, StackTrace *stack); 118 119uptr asan_mz_size(const void *ptr); 120void asan_mz_force_lock(); 121void asan_mz_force_unlock(); 122 123void PrintInternalAllocatorStats(); 124 125} // namespace __asan 126#endif // ASAN_ALLOCATOR_H 127