/*
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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_DEX2OAT_DEX_DEX_TO_DEX_COMPILER_H_
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#define ART_DEX2OAT_DEX_DEX_TO_DEX_COMPILER_H_
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#include <set>
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#include <unordered_map>
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#include <unordered_set>
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#include "base/bit_vector.h"
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#include "base/mutex.h"
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#include "dex/invoke_type.h"
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#include "dex/method_reference.h"
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#include "handle.h"
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#include "quicken_info.h"
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namespace art {
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class CompiledMethod;
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class CompilerDriver;
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class DexCompilationUnit;
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class DexFile;
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namespace dex {
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struct CodeItem;
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} // namespace dex
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namespace mirror {
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class ClassLoader;
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} // namespace mirror
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namespace optimizer {
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class DexToDexCompiler {
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public:
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enum class CompilationLevel {
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kDontDexToDexCompile, // Only meaning wrt image time interpretation.
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kOptimize // Perform peep-hole optimizations.
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};
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explicit DexToDexCompiler(CompilerDriver* driver);
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CompiledMethod* CompileMethod(const dex::CodeItem* code_item,
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uint32_t access_flags,
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InvokeType invoke_type,
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uint16_t class_def_idx,
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uint32_t method_idx,
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Handle<mirror::ClassLoader> class_loader,
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const DexFile& dex_file,
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const CompilationLevel compilation_level) WARN_UNUSED;
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void MarkForCompilation(Thread* self,
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const MethodReference& method_ref);
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void ClearState();
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// Unquicken all methods that have conflicting quicken info. This is not done during the
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// quickening process to avoid race conditions.
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void UnquickenConflictingMethods();
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CompilerDriver* GetDriver() {
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return driver_;
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}
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bool ShouldCompileMethod(const MethodReference& ref);
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// Return the number of code items to quicken.
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size_t NumCodeItemsToQuicken(Thread* self) const;
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void SetDexFiles(const std::vector<const DexFile*>& dex_files);
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private:
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// Holds the state for compiling a single method.
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struct CompilationState;
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// Quicken state for a code item, may be referenced by multiple methods.
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struct QuickenState {
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std::vector<MethodReference> methods_;
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std::vector<uint8_t> quicken_data_;
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bool optimized_return_void_ = false;
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bool conflict_ = false;
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};
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BitVector* GetOrAddBitVectorForDex(const DexFile* dex_file) REQUIRES(lock_);
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CompilerDriver* const driver_;
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// State for adding methods (should this be in its own class?).
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const DexFile* active_dex_file_ = nullptr;
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BitVector* active_bit_vector_ = nullptr;
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// Lock that guards duplicate code items and the bitmap.
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mutable Mutex lock_;
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// Record what method references are going to get quickened.
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std::unordered_map<const DexFile*, BitVector> should_quicken_;
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// Guarded by lock_ during writing, accessed without a lock during quickening.
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// This is safe because no thread is adding to the shared code items during the quickening phase.
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std::unordered_set<const dex::CodeItem*> shared_code_items_;
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// Blacklisted code items are unquickened in UnquickenConflictingMethods.
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std::unordered_map<const dex::CodeItem*, QuickenState> shared_code_item_quicken_info_
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GUARDED_BY(lock_);
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// Number of added code items.
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size_t num_code_items_ GUARDED_BY(lock_) = 0u;
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};
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std::ostream& operator<<(std::ostream& os, const DexToDexCompiler::CompilationLevel& rhs);
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} // namespace optimizer
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} // namespace art
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#endif // ART_DEX2OAT_DEX_DEX_TO_DEX_COMPILER_H_
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