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 #ifndef _LIBUNWINDSTACK_MEMORY_FILE_AT_OFFSET_H 18 #define _LIBUNWINDSTACK_MEMORY_FILE_AT_OFFSET_H 19 20 #include <stdint.h> 21 22 #include <unwindstack/Memory.h> 23 24 namespace unwindstack { 25 26 class MemoryFileAtOffset : public Memory { 27 public: 28 MemoryFileAtOffset() = default; 29 virtual ~MemoryFileAtOffset(); 30 31 bool Init(const std::string& file, uint64_t offset, uint64_t size = UINT64_MAX); 32 33 uint8_t* GetPtr(size_t addr = 0) override { return addr < size_ ? data_ + addr : nullptr; } 34 35 size_t Read(uint64_t addr, void* dst, size_t size) override; 36 Size()37 size_t Size() { return size_; } 38 39 void Clear() override; 40 41 protected: 42 size_t size_ = 0; 43 size_t offset_ = 0; 44 uint8_t* data_ = nullptr; 45 }; 46 47 } // namespace unwindstack 48 49 #endif // _LIBUNWINDSTACK_MEMORY_FILE_AT_OFFSET_H 50