1 /* 2 * Copyright (C) 2019 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #pragma once 18 19 #include <stdint.h> 20 21 #include <map> 22 #include <memory> 23 #include <string> 24 25 #include <unwindstack/Memory.h> 26 27 namespace unwindstack { 28 29 // MemoryRange maps one address range onto another. 30 // The range [src_begin, src_begin + length) in the underlying Memory is mapped onto offset, 31 // such that range.read(offset) is equivalent to underlying.read(src_begin). 32 class MemoryRange : public Memory { 33 public: 34 MemoryRange(const std::shared_ptr<Memory>& memory, uint64_t begin, uint64_t length, 35 uint64_t offset); 36 virtual ~MemoryRange() = default; 37 38 size_t Read(uint64_t addr, void* dst, size_t size) override; 39 offset()40 uint64_t offset() { return offset_; } length()41 uint64_t length() { return length_; } 42 43 private: 44 std::shared_ptr<Memory> memory_; 45 uint64_t begin_; 46 uint64_t length_; 47 uint64_t offset_; 48 }; 49 50 class MemoryRanges : public Memory { 51 public: 52 MemoryRanges() = default; 53 virtual ~MemoryRanges() = default; 54 55 bool Insert(MemoryRange* memory); 56 57 size_t Read(uint64_t addr, void* dst, size_t size) override; 58 59 private: 60 std::map<uint64_t, std::unique_ptr<MemoryRange>> maps_; 61 }; 62 63 } // namespace unwindstack 64