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