1 //===-- bytemap.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 #ifndef SCUDO_BYTEMAP_H_ 10 #define SCUDO_BYTEMAP_H_ 11 12 #include "atomic_helpers.h" 13 #include "common.h" 14 #include "mutex.h" 15 16 namespace scudo { 17 18 template <uptr Size> class FlatByteMap { 19 public: 20 void initLinkerInitialized() {} 21 void init() { memset(Map, 0, sizeof(Map)); } 22 23 void unmapTestOnly() {} 24 25 void set(uptr Index, u8 Value) { 26 DCHECK_LT(Index, Size); 27 DCHECK_EQ(0U, Map[Index]); 28 Map[Index] = Value; 29 } 30 u8 operator[](uptr Index) { 31 DCHECK_LT(Index, Size); 32 return Map[Index]; 33 } 34 35 void disable() {} 36 void enable() {} 37 38 private: 39 u8 Map[Size]; 40 }; 41 42 } // namespace scudo 43 44 #endif // SCUDO_BYTEMAP_H_ 45