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