compiler-rt/lib/msan/msan_allocator.h

   1 //===-- msan_allocator.h ----------------------------------------*- C++ -*-===//
   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 MemorySanitizer.
  10 //
  11 //===----------------------------------------------------------------------===//
  12
  13 #ifndef MSAN_ALLOCATOR_H
  14 #define MSAN_ALLOCATOR_H
  15
  16 #include "sanitizer_common/sanitizer_common.h"
  17
  18 namespace __msan {
  19
  20 struct MsanThreadLocalMallocStorage {
  21   // Allocator cache contains atomic_uint64_t which must be 8-byte aligned.
  22   alignas(8) uptr allocator_cache[96 * (512 * 8 + 16)];  // Opaque.
  23   void Init();
  24   void CommitBack();
  25
  26  private:
  27   // These objects are allocated via mmap() and are zero-initialized.
  28   MsanThreadLocalMallocStorage() {}
  29 };
  30
  31 void LockAllocator();
  32 void UnlockAllocator();
  33
  34 } // namespace __msan
  35 #endif // MSAN_ALLOCATOR_H