forked from OSchip/llvm-project
127 lines
3.8 KiB
C++
127 lines
3.8 KiB
C++
//===-- asan_allocator.h ----------------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file is a part of AddressSanitizer, an address sanity checker.
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//
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// ASan-private header for asan_allocator2.cc.
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//===----------------------------------------------------------------------===//
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#ifndef ASAN_ALLOCATOR_H
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#define ASAN_ALLOCATOR_H
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#include "asan_internal.h"
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#include "asan_interceptors.h"
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#include "sanitizer_common/sanitizer_list.h"
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namespace __asan {
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enum AllocType {
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FROM_MALLOC = 1, // Memory block came from malloc, calloc, realloc, etc.
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FROM_NEW = 2, // Memory block came from operator new.
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FROM_NEW_BR = 3 // Memory block came from operator new [ ]
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};
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static const uptr kNumberOfSizeClasses = 255;
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struct AsanChunk;
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void InitializeAllocator();
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void ReInitializeAllocator();
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class AsanChunkView {
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public:
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explicit AsanChunkView(AsanChunk *chunk) : chunk_(chunk) {}
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bool IsValid(); // Checks if AsanChunkView points to a valid allocated
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// or quarantined chunk.
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uptr Beg(); // First byte of user memory.
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uptr End(); // Last byte of user memory.
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uptr UsedSize(); // Size requested by the user.
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uptr AllocTid();
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uptr FreeTid();
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bool Eq(const AsanChunkView &c) const { return chunk_ == c.chunk_; }
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void GetAllocStack(StackTrace *stack);
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void GetFreeStack(StackTrace *stack);
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bool AddrIsInside(uptr addr, uptr access_size, sptr *offset) {
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if (addr >= Beg() && (addr + access_size) <= End()) {
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*offset = addr - Beg();
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return true;
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}
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return false;
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}
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bool AddrIsAtLeft(uptr addr, uptr access_size, sptr *offset) {
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(void)access_size;
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if (addr < Beg()) {
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*offset = Beg() - addr;
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return true;
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}
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return false;
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}
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bool AddrIsAtRight(uptr addr, uptr access_size, sptr *offset) {
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if (addr + access_size > End()) {
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*offset = addr - End();
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return true;
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}
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return false;
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}
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private:
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AsanChunk *const chunk_;
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};
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AsanChunkView FindHeapChunkByAddress(uptr address);
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// List of AsanChunks with total size.
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class AsanChunkFifoList: public IntrusiveList<AsanChunk> {
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public:
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explicit AsanChunkFifoList(LinkerInitialized) { }
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AsanChunkFifoList() { clear(); }
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void Push(AsanChunk *n);
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void PushList(AsanChunkFifoList *q);
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AsanChunk *Pop();
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uptr size() { return size_; }
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void clear() {
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IntrusiveList<AsanChunk>::clear();
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size_ = 0;
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}
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private:
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uptr size_;
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};
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struct AsanThreadLocalMallocStorage {
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uptr quarantine_cache[16];
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// Allocator cache contains atomic_uint64_t which must be 8-byte aligned.
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ALIGNED(8) uptr allocator2_cache[96 * (512 * 8 + 16)]; // Opaque.
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void CommitBack();
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private:
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// These objects are allocated via mmap() and are zero-initialized.
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AsanThreadLocalMallocStorage() {}
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};
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void *asan_memalign(uptr alignment, uptr size, StackTrace *stack,
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AllocType alloc_type);
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void asan_free(void *ptr, StackTrace *stack, AllocType alloc_type);
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void *asan_malloc(uptr size, StackTrace *stack);
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void *asan_calloc(uptr nmemb, uptr size, StackTrace *stack);
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void *asan_realloc(void *p, uptr size, StackTrace *stack);
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void *asan_valloc(uptr size, StackTrace *stack);
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void *asan_pvalloc(uptr size, StackTrace *stack);
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int asan_posix_memalign(void **memptr, uptr alignment, uptr size,
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StackTrace *stack);
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uptr asan_malloc_usable_size(void *ptr, uptr pc, uptr bp);
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uptr asan_mz_size(const void *ptr);
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void asan_mz_force_lock();
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void asan_mz_force_unlock();
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void PrintInternalAllocatorStats();
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} // namespace __asan
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#endif // ASAN_ALLOCATOR_H
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