asan_allocator.h revision 327952
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_allocator.cc. 13//===----------------------------------------------------------------------===// 14 15#ifndef ASAN_ALLOCATOR_H 16#define ASAN_ALLOCATOR_H 17 18#include "asan_flags.h" 19#include "asan_internal.h" 20#include "asan_interceptors.h" 21#include "sanitizer_common/sanitizer_allocator.h" 22#include "sanitizer_common/sanitizer_list.h" 23 24namespace __asan { 25 26enum AllocType { 27 FROM_MALLOC = 1, // Memory block came from malloc, calloc, realloc, etc. 28 FROM_NEW = 2, // Memory block came from operator new. 29 FROM_NEW_BR = 3 // Memory block came from operator new [ ] 30}; 31 32struct AsanChunk; 33 34struct AllocatorOptions { 35 u32 quarantine_size_mb; 36 u32 thread_local_quarantine_size_kb; 37 u16 min_redzone; 38 u16 max_redzone; 39 u8 may_return_null; 40 u8 alloc_dealloc_mismatch; 41 s32 release_to_os_interval_ms; 42 43 void SetFrom(const Flags *f, const CommonFlags *cf); 44 void CopyTo(Flags *f, CommonFlags *cf); 45}; 46 47void InitializeAllocator(const AllocatorOptions &options); 48void ReInitializeAllocator(const AllocatorOptions &options); 49void GetAllocatorOptions(AllocatorOptions *options); 50 51class AsanChunkView { 52 public: 53 explicit AsanChunkView(AsanChunk *chunk) : chunk_(chunk) {} 54 bool IsValid() const; // Checks if AsanChunkView points to a valid 55 // allocated or quarantined chunk. 56 bool IsAllocated() const; // Checks if the memory is currently allocated. 57 bool IsQuarantined() const; // Checks if the memory is currently quarantined. 58 uptr Beg() const; // First byte of user memory. 59 uptr End() const; // Last byte of user memory. 60 uptr UsedSize() const; // Size requested by the user. 61 u32 UserRequestedAlignment() const; // Originally requested alignment. 62 uptr AllocTid() const; 63 uptr FreeTid() const; 64 bool Eq(const AsanChunkView &c) const { return chunk_ == c.chunk_; } 65 u32 GetAllocStackId() const; 66 u32 GetFreeStackId() const; 67 StackTrace GetAllocStack() const; 68 StackTrace GetFreeStack() const; 69 AllocType GetAllocType() const; 70 bool AddrIsInside(uptr addr, uptr access_size, sptr *offset) const { 71 if (addr >= Beg() && (addr + access_size) <= End()) { 72 *offset = addr - Beg(); 73 return true; 74 } 75 return false; 76 } 77 bool AddrIsAtLeft(uptr addr, uptr access_size, sptr *offset) const { 78 (void)access_size; 79 if (addr < Beg()) { 80 *offset = Beg() - addr; 81 return true; 82 } 83 return false; 84 } 85 bool AddrIsAtRight(uptr addr, uptr access_size, sptr *offset) const { 86 if (addr + access_size > End()) { 87 *offset = addr - End(); 88 return true; 89 } 90 return false; 91 } 92 93 private: 94 AsanChunk *const chunk_; 95}; 96 97AsanChunkView FindHeapChunkByAddress(uptr address); 98AsanChunkView FindHeapChunkByAllocBeg(uptr address); 99 100// List of AsanChunks with total size. 101class AsanChunkFifoList: public IntrusiveList<AsanChunk> { 102 public: 103 explicit AsanChunkFifoList(LinkerInitialized) { } 104 AsanChunkFifoList() { clear(); } 105 void Push(AsanChunk *n); 106 void PushList(AsanChunkFifoList *q); 107 AsanChunk *Pop(); 108 uptr size() { return size_; } 109 void clear() { 110 IntrusiveList<AsanChunk>::clear(); 111 size_ = 0; 112 } 113 private: 114 uptr size_; 115}; 116 117struct AsanMapUnmapCallback { 118 void OnMap(uptr p, uptr size) const; 119 void OnUnmap(uptr p, uptr size) const; 120}; 121 122#if SANITIZER_CAN_USE_ALLOCATOR64 123# if SANITIZER_FUCHSIA 124const uptr kAllocatorSpace = ~(uptr)0; 125const uptr kAllocatorSize = 0x40000000000ULL; // 4T. 126typedef DefaultSizeClassMap SizeClassMap; 127# elif defined(__powerpc64__) 128const uptr kAllocatorSpace = 0xa0000000000ULL; 129const uptr kAllocatorSize = 0x20000000000ULL; // 2T. 130typedef DefaultSizeClassMap SizeClassMap; 131# elif defined(__aarch64__) && SANITIZER_ANDROID 132const uptr kAllocatorSpace = 0x3000000000ULL; 133const uptr kAllocatorSize = 0x2000000000ULL; // 128G. 134typedef VeryCompactSizeClassMap SizeClassMap; 135# elif defined(__aarch64__) 136// AArch64/SANITIZER_CAN_USER_ALLOCATOR64 is only for 42-bit VMA 137// so no need to different values for different VMA. 138const uptr kAllocatorSpace = 0x10000000000ULL; 139const uptr kAllocatorSize = 0x10000000000ULL; // 3T. 140typedef DefaultSizeClassMap SizeClassMap; 141# elif SANITIZER_WINDOWS 142const uptr kAllocatorSpace = ~(uptr)0; 143const uptr kAllocatorSize = 0x8000000000ULL; // 500G 144typedef DefaultSizeClassMap SizeClassMap; 145# else 146const uptr kAllocatorSpace = 0x600000000000ULL; 147const uptr kAllocatorSize = 0x40000000000ULL; // 4T. 148typedef DefaultSizeClassMap SizeClassMap; 149# endif 150struct AP64 { // Allocator64 parameters. Deliberately using a short name. 151 static const uptr kSpaceBeg = kAllocatorSpace; 152 static const uptr kSpaceSize = kAllocatorSize; 153 static const uptr kMetadataSize = 0; 154 typedef __asan::SizeClassMap SizeClassMap; 155 typedef AsanMapUnmapCallback MapUnmapCallback; 156 static const uptr kFlags = 0; 157}; 158 159typedef SizeClassAllocator64<AP64> PrimaryAllocator; 160#else // Fallback to SizeClassAllocator32. 161static const uptr kRegionSizeLog = 20; 162static const uptr kNumRegions = SANITIZER_MMAP_RANGE_SIZE >> kRegionSizeLog; 163# if SANITIZER_WORDSIZE == 32 164typedef FlatByteMap<kNumRegions> ByteMap; 165# elif SANITIZER_WORDSIZE == 64 166typedef TwoLevelByteMap<(kNumRegions >> 12), 1 << 12> ByteMap; 167# endif 168typedef CompactSizeClassMap SizeClassMap; 169struct AP32 { 170 static const uptr kSpaceBeg = 0; 171 static const u64 kSpaceSize = SANITIZER_MMAP_RANGE_SIZE; 172 static const uptr kMetadataSize = 16; 173 typedef __asan::SizeClassMap SizeClassMap; 174 static const uptr kRegionSizeLog = __asan::kRegionSizeLog; 175 typedef __asan::ByteMap ByteMap; 176 typedef AsanMapUnmapCallback MapUnmapCallback; 177 static const uptr kFlags = 0; 178}; 179typedef SizeClassAllocator32<AP32> PrimaryAllocator; 180#endif // SANITIZER_CAN_USE_ALLOCATOR64 181 182static const uptr kNumberOfSizeClasses = SizeClassMap::kNumClasses; 183typedef SizeClassAllocatorLocalCache<PrimaryAllocator> AllocatorCache; 184typedef LargeMmapAllocator<AsanMapUnmapCallback> SecondaryAllocator; 185typedef CombinedAllocator<PrimaryAllocator, AllocatorCache, 186 SecondaryAllocator> AsanAllocator; 187 188 189struct AsanThreadLocalMallocStorage { 190 uptr quarantine_cache[16]; 191 AllocatorCache allocator_cache; 192 void CommitBack(); 193 private: 194 // These objects are allocated via mmap() and are zero-initialized. 195 AsanThreadLocalMallocStorage() {} 196}; 197 198void *asan_memalign(uptr alignment, uptr size, BufferedStackTrace *stack, 199 AllocType alloc_type); 200void asan_free(void *ptr, BufferedStackTrace *stack, AllocType alloc_type); 201void asan_delete(void *ptr, uptr size, uptr alignment, 202 BufferedStackTrace *stack, AllocType alloc_type); 203 204void *asan_malloc(uptr size, BufferedStackTrace *stack); 205void *asan_calloc(uptr nmemb, uptr size, BufferedStackTrace *stack); 206void *asan_realloc(void *p, uptr size, BufferedStackTrace *stack); 207void *asan_valloc(uptr size, BufferedStackTrace *stack); 208void *asan_pvalloc(uptr size, BufferedStackTrace *stack); 209 210int asan_posix_memalign(void **memptr, uptr alignment, uptr size, 211 BufferedStackTrace *stack); 212uptr asan_malloc_usable_size(const void *ptr, uptr pc, uptr bp); 213 214uptr asan_mz_size(const void *ptr); 215void asan_mz_force_lock(); 216void asan_mz_force_unlock(); 217 218void PrintInternalAllocatorStats(); 219void AsanSoftRssLimitExceededCallback(bool exceeded); 220 221} // namespace __asan 222#endif // ASAN_ALLOCATOR_H 223