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/*
* 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_RANGE_H
#define _LIBUNWINDSTACK_MEMORY_RANGE_H
#include <stdint.h>
#include <map>
#include <memory>
#include <string>
#include <unwindstack/Memory.h>
namespace unwindstack {
// MemoryRange maps one address range onto another.
// The range [src_begin, src_begin + length) in the underlying Memory is mapped onto offset,
// such that range.read(offset) is equivalent to underlying.read(src_begin).
class MemoryRange : public Memory {
public:
MemoryRange(const std::shared_ptr<Memory>& memory, uint64_t begin, uint64_t length,
uint64_t offset);
virtual ~MemoryRange() = default;
size_t Read(uint64_t addr, void* dst, size_t size) override;
uint64_t offset() { return offset_; }
uint64_t length() { return length_; }
private:
std::shared_ptr<Memory> memory_;
uint64_t begin_;
uint64_t length_;
uint64_t offset_;
};
class MemoryRanges : public Memory {
public:
MemoryRanges() = default;
virtual ~MemoryRanges() = default;
bool Insert(MemoryRange* memory);
size_t Read(uint64_t addr, void* dst, size_t size) override;
private:
std::map<uint64_t, std::unique_ptr<MemoryRange>> maps_;
};
} // namespace unwindstack
#endif // _LIBUNWINDSTACK_MEMORY_RANGE_H
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