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_BUFFER_H
18 #define _LIBUNWINDSTACK_MEMORY_BUFFER_H
19 
20 #include <stdint.h>
21 
22 #include <string>
23 #include <vector>
24 
25 #include <unwindstack/Memory.h>
26 
27 namespace unwindstack {
28 
29 class MemoryBuffer : public Memory {
30  public:
31   MemoryBuffer() = default;
~MemoryBuffer()32   virtual ~MemoryBuffer() { free(raw_); }
33 
34   size_t Read(uint64_t addr, void* dst, size_t size) override;
35 
36   uint8_t* GetPtr(size_t offset) override;
37 
Resize(size_t size)38   bool Resize(size_t size) {
39     void* new_raw = realloc(raw_, size);
40     if (new_raw == nullptr) {
41       free(raw_);
42       raw_ = nullptr;
43       size_ = 0;
44       return false;
45     }
46     raw_ = reinterpret_cast<uint8_t*>(new_raw);
47     size_ = size;
48     return true;
49   }
50 
Size()51   uint64_t Size() { return size_; }
52 
53  private:
54   uint8_t* raw_ = nullptr;
55   size_t size_ = 0;
56 };
57 
58 }  // namespace unwindstack
59 
60 #endif  // _LIBUNWINDSTACK_MEMORY_BUFFER_H
61