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/*
* Copyright (C) 2015 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 ART_COMPILER_DRIVER_COMPILED_METHOD_STORAGE_H_
#define ART_COMPILER_DRIVER_COMPILED_METHOD_STORAGE_H_
#include <iosfwd>
#include <map>
#include <memory>
#include "base/array_ref.h"
#include "base/length_prefixed_array.h"
#include "base/macros.h"
#include "utils/dedupe_set.h"
#include "utils/swap_space.h"
namespace art {
namespace linker {
class LinkerPatch;
} // namespace linker
class CompiledMethodStorage {
public:
explicit CompiledMethodStorage(int swap_fd);
~CompiledMethodStorage();
void DumpMemoryUsage(std::ostream& os, bool extended) const;
void SetDedupeEnabled(bool dedupe_enabled) {
dedupe_enabled_ = dedupe_enabled;
}
bool DedupeEnabled() const {
return dedupe_enabled_;
}
SwapAllocator<void> GetSwapSpaceAllocator() {
return SwapAllocator<void>(swap_space_.get());
}
const LengthPrefixedArray<uint8_t>* DeduplicateCode(const ArrayRef<const uint8_t>& code);
void ReleaseCode(const LengthPrefixedArray<uint8_t>* code);
const LengthPrefixedArray<uint8_t>* DeduplicateVMapTable(const ArrayRef<const uint8_t>& table);
void ReleaseVMapTable(const LengthPrefixedArray<uint8_t>* table);
const LengthPrefixedArray<uint8_t>* DeduplicateCFIInfo(const ArrayRef<const uint8_t>& cfi_info);
void ReleaseCFIInfo(const LengthPrefixedArray<uint8_t>* cfi_info);
const LengthPrefixedArray<linker::LinkerPatch>* DeduplicateLinkerPatches(
const ArrayRef<const linker::LinkerPatch>& linker_patches);
void ReleaseLinkerPatches(const LengthPrefixedArray<linker::LinkerPatch>* linker_patches);
// Returns the code associated with the given patch.
// If the code has not been set, returns empty data.
// If `debug_name` is not null, stores the associated debug name in `*debug_name`.
ArrayRef<const uint8_t> GetThunkCode(const linker::LinkerPatch& linker_patch,
/*out*/ std::string* debug_name = nullptr);
// Sets the code and debug name associated with the given patch.
void SetThunkCode(const linker::LinkerPatch& linker_patch,
ArrayRef<const uint8_t> code,
const std::string& debug_name);
private:
class ThunkMapKey;
class ThunkMapValue;
using ThunkMapValueType = std::pair<const ThunkMapKey, ThunkMapValue>;
using ThunkMap = std::map<ThunkMapKey,
ThunkMapValue,
std::less<ThunkMapKey>,
SwapAllocator<ThunkMapValueType>>;
static_assert(std::is_same<ThunkMapValueType, ThunkMap::value_type>::value, "Value type check.");
static ThunkMapKey GetThunkMapKey(const linker::LinkerPatch& linker_patch);
template <typename T, typename DedupeSetType>
const LengthPrefixedArray<T>* AllocateOrDeduplicateArray(const ArrayRef<const T>& data,
DedupeSetType* dedupe_set);
template <typename T>
void ReleaseArrayIfNotDeduplicated(const LengthPrefixedArray<T>* array);
// DeDuplication data structures.
template <typename ContentType>
class DedupeHashFunc;
template <typename T>
class LengthPrefixedArrayAlloc;
template <typename T>
using ArrayDedupeSet = DedupeSet<ArrayRef<const T>,
LengthPrefixedArray<T>,
LengthPrefixedArrayAlloc<T>,
size_t,
DedupeHashFunc<const T>,
4>;
// Swap pool and allocator used for native allocations. May be file-backed. Needs to be first
// as other fields rely on this.
std::unique_ptr<SwapSpace> swap_space_;
bool dedupe_enabled_;
ArrayDedupeSet<uint8_t> dedupe_code_;
ArrayDedupeSet<uint8_t> dedupe_vmap_table_;
ArrayDedupeSet<uint8_t> dedupe_cfi_info_;
ArrayDedupeSet<linker::LinkerPatch> dedupe_linker_patches_;
Mutex thunk_map_lock_;
ThunkMap thunk_map_ GUARDED_BY(thunk_map_lock_);
DISALLOW_COPY_AND_ASSIGN(CompiledMethodStorage);
};
} // namespace art
#endif // ART_COMPILER_DRIVER_COMPILED_METHOD_STORAGE_H_
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