dex2oat/driver/compiler_driver.h - LeafOS-Project/android_art - Gitiles

 /*
  * Copyright (C) 2011 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_DEX2OAT_DRIVER_COMPILER_DRIVER_H_
 #define ART_DEX2OAT_DRIVER_COMPILER_DRIVER_H_

 #include <atomic>
 #include <set>
 #include <string>
 #include <vector>

 #include "arch/instruction_set.h"
 #include "base/array_ref.h"
 #include "base/bit_utils.h"
 #include "base/hash_set.h"
 #include "base/mutex.h"
 #include "base/os.h"
 #include "base/quasi_atomic.h"
 #include "base/safe_map.h"
 #include "base/timing_logger.h"
 #include "class_status.h"
 #include "compiler.h"
 #include "dex/class_reference.h"
 #include "dex/dex_file_types.h"
 #include "dex/method_reference.h"
 #include "driver/compiled_method_storage.h"
 #include "thread_pool.h"
 #include "utils/atomic_dex_ref_map.h"

 namespace art {

 namespace dex {
 struct CodeItem;
 }  // namespace dex

 namespace mirror {
 class Class;
 class DexCache;
 }  // namespace mirror

 namespace verifier {
 class MethodVerifier;
 class VerifierDepsTest;
 }  // namespace verifier

 class ArtField;
 class BitVector;
 class CompiledMethod;
 class CompilerOptions;
 class DexCompilationUnit;
 class DexFile;
 template<class T> class Handle;
 struct InlineIGetIPutData;
 class InstructionSetFeatures;
 class InternTable;
 enum InvokeType : uint32_t;
 class MemberOffset;
 template<class MirrorType> class ObjPtr;
 class ParallelCompilationManager;
 class ProfileCompilationInfo;
 class ScopedObjectAccess;
 template <class Allocator> class SrcMap;
 class TimingLogger;
 class VdexFile;
 class VerificationResults;

 class CompilerDriver {
  public:
   // Create a compiler targeting the requested "instruction_set".
   // "image" should be true if image specific optimizations should be
   // enabled.  "image_classes" lets the compiler know what classes it
   // can assume will be in the image, with null implying all available
   // classes.
   CompilerDriver(const CompilerOptions* compiler_options,
                  const VerificationResults* verification_results,
                  Compiler::Kind compiler_kind,
                  size_t thread_count,
                  int swap_fd);

   ~CompilerDriver();

   void PrepareDexFilesForOatFile(TimingLogger* timings);

   // Set dex files classpath.
   void SetClasspathDexFiles(const std::vector<const DexFile*>& dex_files);

   // Initialize and destroy thread pools. This is exposed because we do not want
   // to do this twice, for PreCompile() and CompileAll().
   void InitializeThreadPools();
   void FreeThreadPools();

   void PreCompile(jobject class_loader,
                   const std::vector<const DexFile*>& dex_files,
                   TimingLogger* timings,
                   /*inout*/ HashSet<std::string>* image_classes)
       REQUIRES(!Locks::mutator_lock_);
   void CompileAll(jobject class_loader,
                   const std::vector<const DexFile*>& dex_files,
                   TimingLogger* timings)
       REQUIRES(!Locks::mutator_lock_);

   const CompilerOptions& GetCompilerOptions() const {
     return *compiler_options_;
   }

   const VerificationResults* GetVerificationResults() const {
     return verification_results_;
   }

   Compiler* GetCompiler() const {
     return compiler_.get();
   }

   // Generate the trampolines that are invoked by unresolved direct methods.
   std::unique_ptr<const std::vector<uint8_t>> CreateJniDlsymLookupTrampoline() const;
   std::unique_ptr<const std::vector<uint8_t>> CreateJniDlsymLookupCriticalTrampoline() const;
   std::unique_ptr<const std::vector<uint8_t>> CreateQuickGenericJniTrampoline() const;
   std::unique_ptr<const std::vector<uint8_t>> CreateQuickImtConflictTrampoline() const;
   std::unique_ptr<const std::vector<uint8_t>> CreateQuickResolutionTrampoline() const;
   std::unique_ptr<const std::vector<uint8_t>> CreateQuickToInterpreterBridge() const;
   std::unique_ptr<const std::vector<uint8_t>> CreateNterpTrampoline() const;

   ClassStatus GetClassStatus(const ClassReference& ref) const;
   bool GetCompiledClass(const ClassReference& ref, ClassStatus* status) const;

   CompiledMethod* GetCompiledMethod(MethodReference ref) const;
   // Add a compiled method.
   void AddCompiledMethod(const MethodReference& method_ref, CompiledMethod* const compiled_method);
   CompiledMethod* RemoveCompiledMethod(const MethodReference& method_ref);

   // Resolve compiling method's class. Returns null on failure.
   ObjPtr<mirror::Class> ResolveCompilingMethodsClass(const ScopedObjectAccess& soa,
                                                      Handle<mirror::DexCache> dex_cache,
                                                      Handle<mirror::ClassLoader> class_loader,
                                                      const DexCompilationUnit* mUnit)
       REQUIRES_SHARED(Locks::mutator_lock_);

   ObjPtr<mirror::Class> ResolveClass(const ScopedObjectAccess& soa,
                                      Handle<mirror::DexCache> dex_cache,
                                      Handle<mirror::ClassLoader> class_loader,
                                      dex::TypeIndex type_index,
                                      const DexCompilationUnit* mUnit)
       REQUIRES_SHARED(Locks::mutator_lock_);

   // Resolve a field. Returns null on failure, including incompatible class change.
   // NOTE: Unlike ClassLinker's ResolveField(), this method enforces is_static.
   ArtField* ResolveField(const ScopedObjectAccess& soa,
                          Handle<mirror::DexCache> dex_cache,
                          Handle<mirror::ClassLoader> class_loader,
                          uint32_t field_idx,
                          bool is_static)
       REQUIRES_SHARED(Locks::mutator_lock_);

   // Can we fast-path an IGET/IPUT access to an instance field? If yes, compute the field offset.
   std::pair<bool, bool> IsFastInstanceField(ObjPtr<mirror::DexCache> dex_cache,
                                             ObjPtr<mirror::Class> referrer_class,
                                             ArtField* resolved_field,
                                             uint16_t field_idx)
       REQUIRES_SHARED(Locks::mutator_lock_);

   void ProcessedInstanceField(bool resolved);
   void ProcessedStaticField(bool resolved, bool local);

   // Can we fast path instance field access? Computes field's offset and volatility.
   bool ComputeInstanceFieldInfo(uint32_t field_idx, const DexCompilationUnit* mUnit, bool is_put,
                                 MemberOffset* field_offset, bool* is_volatile)
       REQUIRES(!Locks::mutator_lock_);

   ArtField* ComputeInstanceFieldInfo(uint32_t field_idx,
                                      const DexCompilationUnit* mUnit,
                                      bool is_put,
                                      const ScopedObjectAccess& soa)
       REQUIRES_SHARED(Locks::mutator_lock_);


   size_t GetThreadCount() const {
     return parallel_thread_count_;
   }

   void SetDedupeEnabled(bool dedupe_enabled) {
     compiled_method_storage_.SetDedupeEnabled(dedupe_enabled);
   }

   bool DedupeEnabled() const {
     return compiled_method_storage_.DedupeEnabled();
   }

   // Checks whether profile guided verification is enabled and if the method should be verified
   // according to the profile file.
   bool ShouldVerifyClassBasedOnProfile(const DexFile& dex_file, uint16_t class_idx) const;

   void RecordClassStatus(const ClassReference& ref, ClassStatus status);

   // Get memory usage during compilation.
   std::string GetMemoryUsageString(bool extended) const;

   void SetHadHardVerifierFailure() {
     had_hard_verifier_failure_ = true;
   }
   void AddSoftVerifierFailure() {
     number_of_soft_verifier_failures_++;
   }

   Compiler::Kind GetCompilerKind() {
     return compiler_kind_;
   }

   CompiledMethodStorage* GetCompiledMethodStorage() {
     return &compiled_method_storage_;
   }

   const CompiledMethodStorage* GetCompiledMethodStorage() const {
     return &compiled_method_storage_;
   }

  private:
   void LoadImageClasses(TimingLogger* timings, /*inout*/ HashSet<std::string>* image_classes)
       REQUIRES(!Locks::mutator_lock_);

   // Attempt to resolve all type, methods, fields, and strings
   // referenced from code in the dex file following PathClassLoader
   // ordering semantics.
   void Resolve(jobject class_loader,
                const std::vector<const DexFile*>& dex_files,
                TimingLogger* timings)
       REQUIRES(!Locks::mutator_lock_);
   void ResolveDexFile(jobject class_loader,
                       const DexFile& dex_file,
                       const std::vector<const DexFile*>& dex_files,
                       ThreadPool* thread_pool,
                       size_t thread_count,
                       TimingLogger* timings)
       REQUIRES(!Locks::mutator_lock_);

   // Do fast verification through VerifierDeps if possible. Return whether
   // verification was successful.
   bool FastVerify(jobject class_loader,
                   const std::vector<const DexFile*>& dex_files,
                   TimingLogger* timings);

   void Verify(jobject class_loader,
               const std::vector<const DexFile*>& dex_files,
               TimingLogger* timings);

   void VerifyDexFile(jobject class_loader,
                      const DexFile& dex_file,
                      const std::vector<const DexFile*>& dex_files,
                      ThreadPool* thread_pool,
                      size_t thread_count,
                      TimingLogger* timings)
       REQUIRES(!Locks::mutator_lock_);

   void SetVerified(jobject class_loader,
                    const std::vector<const DexFile*>& dex_files,
                    TimingLogger* timings);
   void SetVerifiedDexFile(jobject class_loader,
                           const DexFile& dex_file,
                           const std::vector<const DexFile*>& dex_files,
                           ThreadPool* thread_pool,
                           size_t thread_count,
                           TimingLogger* timings)
       REQUIRES(!Locks::mutator_lock_);

   void InitializeClasses(jobject class_loader,
                          const std::vector<const DexFile*>& dex_files,
                          TimingLogger* timings)
       REQUIRES(!Locks::mutator_lock_);
   void InitializeClasses(jobject class_loader,
                          const DexFile& dex_file,
                          const std::vector<const DexFile*>& dex_files,
                          TimingLogger* timings)
       REQUIRES(!Locks::mutator_lock_);

   void UpdateImageClasses(TimingLogger* timings, /*inout*/ HashSet<std::string>* image_classes)
       REQUIRES(!Locks::mutator_lock_);

   void Compile(jobject class_loader,
                const std::vector<const DexFile*>& dex_files,
                TimingLogger* timings);

   void CheckThreadPools();

   // Resolve const string literals that are loaded from dex code. If only_startup_strings is
   // specified, only methods that are marked startup in the profile are resolved.
   void ResolveConstStrings(const std::vector<const DexFile*>& dex_files,
                            bool only_startup_strings,
                            /*inout*/ TimingLogger* timings);

   const CompilerOptions* const compiler_options_;
   const VerificationResults* const verification_results_;

   std::unique_ptr<Compiler> compiler_;
   Compiler::Kind compiler_kind_;

   // All class references that this compiler has compiled. Indexed by class defs.
   using ClassStateTable = AtomicDexRefMap<ClassReference, ClassStatus>;
   ClassStateTable compiled_classes_;
   // All class references that are in the classpath. Indexed by class defs.
   ClassStateTable classpath_classes_;

   using MethodTable = AtomicDexRefMap<MethodReference, CompiledMethod*>;

   // All method references that this compiler has compiled.
   MethodTable compiled_methods_;

   std::atomic<uint32_t> number_of_soft_verifier_failures_;

   bool had_hard_verifier_failure_;

   // A thread pool that can (potentially) run tasks in parallel.
   size_t parallel_thread_count_;
   std::unique_ptr<ThreadPool> parallel_thread_pool_;

   // A thread pool that guarantees running single-threaded on the main thread.
   std::unique_ptr<ThreadPool> single_thread_pool_;

   class AOTCompilationStats;
   std::unique_ptr<AOTCompilationStats> stats_;

   CompiledMethodStorage compiled_method_storage_;

   size_t max_arena_alloc_;

   friend class CommonCompilerDriverTest;
   friend class CompileClassVisitor;
   friend class InitializeClassVisitor;
   friend class verifier::VerifierDepsTest;
   DISALLOW_COPY_AND_ASSIGN(CompilerDriver);
 };

 }  // namespace art

 #endif  // ART_DEX2OAT_DRIVER_COMPILER_DRIVER_H_
	/*
	* Copyright (C) 2011 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_DEX2OAT_DRIVER_COMPILER_DRIVER_H_
	#define ART_DEX2OAT_DRIVER_COMPILER_DRIVER_H_

	#include <atomic>
	#include <set>
	#include <string>
	#include <vector>

	#include "arch/instruction_set.h"
	#include "base/array_ref.h"
	#include "base/bit_utils.h"
	#include "base/hash_set.h"
	#include "base/mutex.h"
	#include "base/os.h"
	#include "base/quasi_atomic.h"
	#include "base/safe_map.h"
	#include "base/timing_logger.h"
	#include "class_status.h"
	#include "compiler.h"
	#include "dex/class_reference.h"
	#include "dex/dex_file_types.h"
	#include "dex/method_reference.h"
	#include "driver/compiled_method_storage.h"
	#include "thread_pool.h"
	#include "utils/atomic_dex_ref_map.h"

	namespace art {

	namespace dex {
	struct CodeItem;
	} // namespace dex

	namespace mirror {
	class Class;
	class DexCache;
	} // namespace mirror

	namespace verifier {
	class MethodVerifier;
	class VerifierDepsTest;
	} // namespace verifier

	class ArtField;
	class BitVector;
	class CompiledMethod;
	class CompilerOptions;
	class DexCompilationUnit;
	class DexFile;
	template<class T> class Handle;
	struct InlineIGetIPutData;
	class InstructionSetFeatures;
	class InternTable;
	enum InvokeType : uint32_t;
	class MemberOffset;
	template<class MirrorType> class ObjPtr;
	class ParallelCompilationManager;
	class ProfileCompilationInfo;
	class ScopedObjectAccess;
	template <class Allocator> class SrcMap;
	class TimingLogger;
	class VdexFile;
	class VerificationResults;

	class CompilerDriver {
	public:
	// Create a compiler targeting the requested "instruction_set".
	// "image" should be true if image specific optimizations should be
	// enabled. "image_classes" lets the compiler know what classes it
	// can assume will be in the image, with null implying all available
	// classes.
	CompilerDriver(const CompilerOptions* compiler_options,
	const VerificationResults* verification_results,
	Compiler::Kind compiler_kind,
	size_t thread_count,
	int swap_fd);

	~CompilerDriver();

	void PrepareDexFilesForOatFile(TimingLogger* timings);

	// Set dex files classpath.
	void SetClasspathDexFiles(const std::vector<const DexFile*>& dex_files);

	// Initialize and destroy thread pools. This is exposed because we do not want
	// to do this twice, for PreCompile() and CompileAll().
	void InitializeThreadPools();
	void FreeThreadPools();

	void PreCompile(jobject class_loader,
	const std::vector<const DexFile*>& dex_files,
	TimingLogger* timings,
	/inout/ HashSet<std::string>* image_classes)
	REQUIRES(!Locks::mutator_lock_);
	void CompileAll(jobject class_loader,
	const std::vector<const DexFile*>& dex_files,
	TimingLogger* timings)
	REQUIRES(!Locks::mutator_lock_);

	const CompilerOptions& GetCompilerOptions() const {
	return *compiler_options_;
	}

	const VerificationResults* GetVerificationResults() const {
	return verification_results_;
	}

	Compiler* GetCompiler() const {
	return compiler_.get();
	}

	// Generate the trampolines that are invoked by unresolved direct methods.
	std::unique_ptr<const std::vector<uint8_t>> CreateJniDlsymLookupTrampoline() const;
	std::unique_ptr<const std::vector<uint8_t>> CreateJniDlsymLookupCriticalTrampoline() const;
	std::unique_ptr<const std::vector<uint8_t>> CreateQuickGenericJniTrampoline() const;
	std::unique_ptr<const std::vector<uint8_t>> CreateQuickImtConflictTrampoline() const;
	std::unique_ptr<const std::vector<uint8_t>> CreateQuickResolutionTrampoline() const;
	std::unique_ptr<const std::vector<uint8_t>> CreateQuickToInterpreterBridge() const;
	std::unique_ptr<const std::vector<uint8_t>> CreateNterpTrampoline() const;

	ClassStatus GetClassStatus(const ClassReference& ref) const;
	bool GetCompiledClass(const ClassReference& ref, ClassStatus* status) const;

	CompiledMethod* GetCompiledMethod(MethodReference ref) const;
	// Add a compiled method.
	void AddCompiledMethod(const MethodReference& method_ref, CompiledMethod* const compiled_method);
	CompiledMethod* RemoveCompiledMethod(const MethodReference& method_ref);

	// Resolve compiling method's class. Returns null on failure.
	ObjPtr<mirror::Class> ResolveCompilingMethodsClass(const ScopedObjectAccess& soa,
	Handle<mirror::DexCache> dex_cache,
	Handle<mirror::ClassLoader> class_loader,
	const DexCompilationUnit* mUnit)
	REQUIRES_SHARED(Locks::mutator_lock_);

	ObjPtr<mirror::Class> ResolveClass(const ScopedObjectAccess& soa,
	Handle<mirror::DexCache> dex_cache,
	Handle<mirror::ClassLoader> class_loader,
	dex::TypeIndex type_index,
	const DexCompilationUnit* mUnit)
	REQUIRES_SHARED(Locks::mutator_lock_);

	// Resolve a field. Returns null on failure, including incompatible class change.
	// NOTE: Unlike ClassLinker's ResolveField(), this method enforces is_static.
	ArtField* ResolveField(const ScopedObjectAccess& soa,
	Handle<mirror::DexCache> dex_cache,
	Handle<mirror::ClassLoader> class_loader,
	uint32_t field_idx,
	bool is_static)
	REQUIRES_SHARED(Locks::mutator_lock_);

	// Can we fast-path an IGET/IPUT access to an instance field? If yes, compute the field offset.
	std::pair<bool, bool> IsFastInstanceField(ObjPtr<mirror::DexCache> dex_cache,
	ObjPtr<mirror::Class> referrer_class,
	ArtField* resolved_field,
	uint16_t field_idx)
	REQUIRES_SHARED(Locks::mutator_lock_);

	void ProcessedInstanceField(bool resolved);
	void ProcessedStaticField(bool resolved, bool local);

	// Can we fast path instance field access? Computes field's offset and volatility.
	bool ComputeInstanceFieldInfo(uint32_t field_idx, const DexCompilationUnit* mUnit, bool is_put,
	MemberOffset* field_offset, bool* is_volatile)
	REQUIRES(!Locks::mutator_lock_);

	ArtField* ComputeInstanceFieldInfo(uint32_t field_idx,
	const DexCompilationUnit* mUnit,
	bool is_put,
	const ScopedObjectAccess& soa)
	REQUIRES_SHARED(Locks::mutator_lock_);


	size_t GetThreadCount() const {
	return parallel_thread_count_;
	}

	void SetDedupeEnabled(bool dedupe_enabled) {
	compiled_method_storage_.SetDedupeEnabled(dedupe_enabled);
	}

	bool DedupeEnabled() const {
	return compiled_method_storage_.DedupeEnabled();
	}

	// Checks whether profile guided verification is enabled and if the method should be verified
	// according to the profile file.
	bool ShouldVerifyClassBasedOnProfile(const DexFile& dex_file, uint16_t class_idx) const;

	void RecordClassStatus(const ClassReference& ref, ClassStatus status);

	// Get memory usage during compilation.
	std::string GetMemoryUsageString(bool extended) const;

	void SetHadHardVerifierFailure() {
	had_hard_verifier_failure_ = true;
	}
	void AddSoftVerifierFailure() {
	number_of_soft_verifier_failures_++;
	}

	Compiler::Kind GetCompilerKind() {
	return compiler_kind_;
	}

	CompiledMethodStorage* GetCompiledMethodStorage() {
	return &compiled_method_storage_;
	}

	const CompiledMethodStorage* GetCompiledMethodStorage() const {
	return &compiled_method_storage_;
	}

	private:
	void LoadImageClasses(TimingLogger* timings, /inout/ HashSet<std::string>* image_classes)
	REQUIRES(!Locks::mutator_lock_);

	// Attempt to resolve all type, methods, fields, and strings
	// referenced from code in the dex file following PathClassLoader
	// ordering semantics.
	void Resolve(jobject class_loader,
	const std::vector<const DexFile*>& dex_files,
	TimingLogger* timings)
	REQUIRES(!Locks::mutator_lock_);
	void ResolveDexFile(jobject class_loader,
	const DexFile& dex_file,
	const std::vector<const DexFile*>& dex_files,
	ThreadPool* thread_pool,
	size_t thread_count,
	TimingLogger* timings)
	REQUIRES(!Locks::mutator_lock_);

	// Do fast verification through VerifierDeps if possible. Return whether
	// verification was successful.
	bool FastVerify(jobject class_loader,
	const std::vector<const DexFile*>& dex_files,
	TimingLogger* timings);

	void Verify(jobject class_loader,
	const std::vector<const DexFile*>& dex_files,
	TimingLogger* timings);

	void VerifyDexFile(jobject class_loader,
	const DexFile& dex_file,
	const std::vector<const DexFile*>& dex_files,
	ThreadPool* thread_pool,
	size_t thread_count,
	TimingLogger* timings)
	REQUIRES(!Locks::mutator_lock_);

	void SetVerified(jobject class_loader,
	const std::vector<const DexFile*>& dex_files,
	TimingLogger* timings);
	void SetVerifiedDexFile(jobject class_loader,
	const DexFile& dex_file,
	const std::vector<const DexFile*>& dex_files,
	ThreadPool* thread_pool,
	size_t thread_count,
	TimingLogger* timings)
	REQUIRES(!Locks::mutator_lock_);

	void InitializeClasses(jobject class_loader,
	const std::vector<const DexFile*>& dex_files,
	TimingLogger* timings)
	REQUIRES(!Locks::mutator_lock_);
	void InitializeClasses(jobject class_loader,
	const DexFile& dex_file,
	const std::vector<const DexFile*>& dex_files,
	TimingLogger* timings)
	REQUIRES(!Locks::mutator_lock_);

	void UpdateImageClasses(TimingLogger* timings, /inout/ HashSet<std::string>* image_classes)
	REQUIRES(!Locks::mutator_lock_);

	void Compile(jobject class_loader,
	const std::vector<const DexFile*>& dex_files,
	TimingLogger* timings);

	void CheckThreadPools();

	// Resolve const string literals that are loaded from dex code. If only_startup_strings is
	// specified, only methods that are marked startup in the profile are resolved.
	void ResolveConstStrings(const std::vector<const DexFile*>& dex_files,
	bool only_startup_strings,
	/inout/ TimingLogger* timings);

	const CompilerOptions* const compiler_options_;
	const VerificationResults* const verification_results_;

	std::unique_ptr<Compiler> compiler_;
	Compiler::Kind compiler_kind_;

	// All class references that this compiler has compiled. Indexed by class defs.
	using ClassStateTable = AtomicDexRefMap<ClassReference, ClassStatus>;
	ClassStateTable compiled_classes_;
	// All class references that are in the classpath. Indexed by class defs.
	ClassStateTable classpath_classes_;

	using MethodTable = AtomicDexRefMap<MethodReference, CompiledMethod*>;

	// All method references that this compiler has compiled.
	MethodTable compiled_methods_;

	std::atomic<uint32_t> number_of_soft_verifier_failures_;

	bool had_hard_verifier_failure_;

	// A thread pool that can (potentially) run tasks in parallel.
	size_t parallel_thread_count_;
	std::unique_ptr<ThreadPool> parallel_thread_pool_;

	// A thread pool that guarantees running single-threaded on the main thread.
	std::unique_ptr<ThreadPool> single_thread_pool_;

	class AOTCompilationStats;
	std::unique_ptr<AOTCompilationStats> stats_;

	CompiledMethodStorage compiled_method_storage_;

	size_t max_arena_alloc_;

	friend class CommonCompilerDriverTest;
	friend class CompileClassVisitor;
	friend class InitializeClassVisitor;
	friend class verifier::VerifierDepsTest;
	DISALLOW_COPY_AND_ASSIGN(CompilerDriver);
	};

	} // namespace art

	#endif // ART_DEX2OAT_DRIVER_COMPILER_DRIVER_H_