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);
37 
Resize(size_t size)38   bool Resize(size_t size) {
39     raw_ = reinterpret_cast<uint8_t*>(realloc(raw_, size));
40     if (raw_ == nullptr) {
41       size_ = 0;
42       return false;
43     }
44     size_ = size;
45     return true;
46   }
47 
Size()48   uint64_t Size() { return size_; }
49 
50  private:
51   uint8_t* raw_ = nullptr;
52   size_t size_ = 0;
53 };
54 
55 }  // namespace unwindstack
56 
57 #endif  // _LIBUNWINDSTACK_MEMORY_BUFFER_H
58