52 lines
1.5 KiB
C
52 lines
1.5 KiB
C
|
/*
|
||
|
|
* Copyright (C) 2019 The Android Open Source Project
|
||
|
|
*
|
||
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
||
|
|
* you may not use this file except in compliance with the License.
|
||
|
|
* You may obtain a copy of the License at
|
||
|
|
*
|
||
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
*
|
||
|
|
* Unless required by applicable law or agreed to in writing, software
|
||
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
||
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
|
|
* See the License for the specific language governing permissions and
|
||
|
|
* limitations under the License.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef _LIBUNWINDSTACK_MEMORY_CACHE_H
|
||
|
|
#define _LIBUNWINDSTACK_MEMORY_CACHE_H
|
||
|
|
|
||
|
|
#include <stdint.h>
|
||
|
|
|
||
|
|
#include <memory>
|
||
|
|
#include <string>
|
||
|
|
#include <unordered_map>
|
||
|
|
|
||
|
|
#include <unwindstack/Memory.h>
|
||
|
|
|
||
|
|
namespace unwindstack {
|
||
|
|
|
||
|
|
class MemoryCache : public Memory {
|
||
|
|
public:
|
||
|
|
MemoryCache(Memory* memory) : impl_(memory) {}
|
||
|
|
virtual ~MemoryCache() = default;
|
||
|
|
|
||
|
|
size_t Read(uint64_t addr, void* dst, size_t size) override;
|
||
|
|
long ReadTag(uint64_t addr) override { return impl_->ReadTag(addr); }
|
||
|
|
|
||
|
|
void Clear() override { cache_.clear(); }
|
||
|
|
|
||
|
|
private:
|
||
|
|
constexpr static size_t kCacheBits = 12;
|
||
|
|
constexpr static size_t kCacheMask = (1 << kCacheBits) - 1;
|
||
|
|
constexpr static size_t kCacheSize = 1 << kCacheBits;
|
||
|
|
std::unordered_map<uint64_t, uint8_t[kCacheSize]> cache_;
|
||
|
|
|
||
|
|
std::unique_ptr<Memory> impl_;
|
||
|
|
};
|
||
|
|
|
||
|
|
} // namespace unwindstack
|
||
|
|
|
||
|
|
#endif // _LIBUNWINDSTACK_MEMORY_CACHE_H
|