1 //=-- lsan_allocator.h ----------------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 // 9 // This file is a part of LeakSanitizer. 10 // Allocator for standalone LSan. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #ifndef LSAN_ALLOCATOR_H 15 #define LSAN_ALLOCATOR_H 16 17 #include "sanitizer_common/sanitizer_allocator.h" 18 #include "sanitizer_common/sanitizer_common.h" 19 #include "sanitizer_common/sanitizer_internal_defs.h" 20 #include "lsan_common.h" 21 22 namespace __lsan { 23 24 void *Allocate(const StackTrace &stack, uptr size, uptr alignment, 25 bool cleared); 26 void Deallocate(void *p); 27 void *Reallocate(const StackTrace &stack, void *p, uptr new_size, 28 uptr alignment); 29 uptr GetMallocUsableSize(const void *p); 30 31 template<typename Callable> 32 void ForEachChunk(const Callable &callback); 33 34 void GetAllocatorCacheRange(uptr *begin, uptr *end); 35 void AllocatorThreadFinish(); 36 void InitializeAllocator(); 37 38 const bool kAlwaysClearMemory = true; 39 40 struct ChunkMetadata { 41 u8 allocated : 8; // Must be first. 42 ChunkTag tag : 2; 43 #if SANITIZER_WORDSIZE == 64 44 uptr requested_size : 54; 45 #else 46 uptr requested_size : 32; 47 uptr padding : 22; 48 #endif 49 u32 stack_trace_id; 50 }; 51 52 #if !SANITIZER_CAN_USE_ALLOCATOR64 53 template <typename AddressSpaceViewTy> 54 struct AP32 { 55 static const uptr kSpaceBeg = 0; 56 static const u64 kSpaceSize = SANITIZER_MMAP_RANGE_SIZE; 57 static const uptr kMetadataSize = sizeof(ChunkMetadata); 58 typedef __sanitizer::CompactSizeClassMap SizeClassMap; 59 static const uptr kRegionSizeLog = 20; 60 using AddressSpaceView = AddressSpaceViewTy; 61 typedef NoOpMapUnmapCallback MapUnmapCallback; 62 static const uptr kFlags = 0; 63 }; 64 template <typename AddressSpaceView> 65 using PrimaryAllocatorASVT = SizeClassAllocator32<AP32<AddressSpaceView>>; 66 using PrimaryAllocator = PrimaryAllocatorASVT<LocalAddressSpaceView>; 67 #else 68 # if SANITIZER_FUCHSIA || defined(__powerpc64__) 69 const uptr kAllocatorSpace = ~(uptr)0; 70 const uptr kAllocatorSize = 0x40000000000ULL; // 4T. 71 #elif defined(__s390x__) 72 const uptr kAllocatorSpace = 0x40000000000ULL; 73 const uptr kAllocatorSize = 0x40000000000ULL; // 4T. 74 # else 75 const uptr kAllocatorSpace = 0x600000000000ULL; 76 const uptr kAllocatorSize = 0x40000000000ULL; // 4T. 77 # endif 78 template <typename AddressSpaceViewTy> 79 struct AP64 { // Allocator64 parameters. Deliberately using a short name. 80 static const uptr kSpaceBeg = kAllocatorSpace; 81 static const uptr kSpaceSize = kAllocatorSize; 82 static const uptr kMetadataSize = sizeof(ChunkMetadata); 83 typedef DefaultSizeClassMap SizeClassMap; 84 typedef NoOpMapUnmapCallback MapUnmapCallback; 85 static const uptr kFlags = 0; 86 using AddressSpaceView = AddressSpaceViewTy; 87 }; 88 89 template <typename AddressSpaceView> 90 using PrimaryAllocatorASVT = SizeClassAllocator64<AP64<AddressSpaceView>>; 91 using PrimaryAllocator = PrimaryAllocatorASVT<LocalAddressSpaceView>; 92 #endif 93 94 template <typename AddressSpaceView> 95 using AllocatorASVT = CombinedAllocator<PrimaryAllocatorASVT<AddressSpaceView>>; 96 using Allocator = AllocatorASVT<LocalAddressSpaceView>; 97 using AllocatorCache = Allocator::AllocatorCache; 98 99 Allocator::AllocatorCache *GetAllocatorCache(); 100 101 int lsan_posix_memalign(void **memptr, uptr alignment, uptr size, 102 const StackTrace &stack); 103 void *lsan_aligned_alloc(uptr alignment, uptr size, const StackTrace &stack); 104 void *lsan_memalign(uptr alignment, uptr size, const StackTrace &stack); 105 void *lsan_malloc(uptr size, const StackTrace &stack); 106 void lsan_free(void *p); 107 void *lsan_realloc(void *p, uptr size, const StackTrace &stack); 108 void *lsan_reallocarray(void *p, uptr nmemb, uptr size, 109 const StackTrace &stack); 110 void *lsan_calloc(uptr nmemb, uptr size, const StackTrace &stack); 111 void *lsan_valloc(uptr size, const StackTrace &stack); 112 void *lsan_pvalloc(uptr size, const StackTrace &stack); 113 uptr lsan_mz_size(const void *p); 114 115 } // namespace __lsan 116 117 #endif // LSAN_ALLOCATOR_H 118