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/*
* 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_COMPILER_DRIVER_COMPILER_DRIVER_H_
#define ART_COMPILER_DRIVER_COMPILER_DRIVER_H_
#include <set>
#include <string>
#include <unordered_set>
#include <vector>
#include "arch/instruction_set.h"
#include "base/array_ref.h"
#include "base/bit_utils.h"
#include "base/mutex.h"
#include "base/timing_logger.h"
#include "class_reference.h"
#include "compiler.h"
#include "dex_file.h"
#include "dex_file_types.h"
#include "driver/compiled_method_storage.h"
#include "jit/profile_compilation_info.h"
#include "invoke_type.h"
#include "method_reference.h"
#include "mirror/class.h" // For mirror::Class::Status.
#include "os.h"
#include "safe_map.h"
#include "thread_pool.h"
#include "utils/atomic_dex_ref_map.h"
#include "utils/dex_cache_arrays_layout.h"
namespace art {
namespace mirror {
class DexCache;
} // namespace mirror
namespace verifier {
class MethodVerifier;
class VerifierDepsTest;
} // namespace verifier
class BitVector;
class CompiledMethod;
class CompilerOptions;
class DexCompilationUnit;
struct InlineIGetIPutData;
class InstructionSetFeatures;
class InternTable;
class ParallelCompilationManager;
class ScopedObjectAccess;
template <class Allocator> class SrcMap;
template<class T> class Handle;
class TimingLogger;
class VdexFile;
class VerificationResults;
class VerifiedMethod;
enum EntryPointCallingConvention {
// ABI of invocations to a method's interpreter entry point.
kInterpreterAbi,
// ABI of calls to a method's native code, only used for native methods.
kJniAbi,
// ABI of calls to a method's quick code entry point.
kQuickAbi
};
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,
VerificationResults* verification_results,
Compiler::Kind compiler_kind,
InstructionSet instruction_set,
const InstructionSetFeatures* instruction_set_features,
std::unordered_set<std::string>* image_classes,
std::unordered_set<std::string>* compiled_classes,
std::unordered_set<std::string>* compiled_methods,
size_t thread_count,
bool dump_stats,
bool dump_passes,
CumulativeLogger* timer,
int swap_fd,
const ProfileCompilationInfo* profile_compilation_info);
~CompilerDriver();
// Set dex files that will be stored in the oat file after being compiled.
void SetDexFilesForOatFile(const std::vector<const DexFile*>& dex_files);
// Get dex file that will be stored in the oat file after being compiled.
ArrayRef<const DexFile* const> GetDexFilesForOatFile() const {
return ArrayRef<const DexFile* const>(dex_files_for_oat_file_);
}
void CompileAll(jobject class_loader,
const std::vector<const DexFile*>& dex_files,
TimingLogger* timings)
REQUIRES(!Locks::mutator_lock_, !dex_to_dex_references_lock_);
// Compile a single Method.
void CompileOne(Thread* self, ArtMethod* method, TimingLogger* timings)
REQUIRES_SHARED(Locks::mutator_lock_)
REQUIRES(!dex_to_dex_references_lock_);
VerificationResults* GetVerificationResults() const;
InstructionSet GetInstructionSet() const {
return instruction_set_;
}
const InstructionSetFeatures* GetInstructionSetFeatures() const {
return instruction_set_features_;
}
const CompilerOptions& GetCompilerOptions() const {
return *compiler_options_;
}
Compiler* GetCompiler() const {
return compiler_.get();
}
const std::unordered_set<std::string>* GetImageClasses() const {
return image_classes_.get();
}
// Generate the trampolines that are invoked by unresolved direct methods.
std::unique_ptr<const std::vector<uint8_t>> CreateJniDlsymLookup() 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;
bool GetCompiledClass(ClassReference ref, mirror::Class::Status* status) const;
CompiledMethod* GetCompiledMethod(MethodReference ref) const;
size_t GetNonRelativeLinkerPatchCount() const;
// Add a compiled method.
void AddCompiledMethod(const MethodReference& method_ref,
CompiledMethod* const compiled_method,
size_t non_relative_linker_patch_count);
void SetRequiresConstructorBarrier(Thread* self,
const DexFile* dex_file,
uint16_t class_def_index,
bool requires)
REQUIRES(!requires_constructor_barrier_lock_);
// Do the <init> methods for this class require a constructor barrier (prior to the return)?
// The answer is "yes", if and only if this class has any instance final fields.
// (This must not be called for any non-<init> methods; the answer would be "no").
//
// ---
//
// JLS 17.5.1 "Semantics of final fields" mandates that all final fields are frozen at the end
// of the invoked constructor. The constructor barrier is a conservative implementation means of
// enforcing the freezes happen-before the object being constructed is observable by another
// thread.
//
// Note: This question only makes sense for instance constructors;
// static constructors (despite possibly having finals) never need
// a barrier.
//
// JLS 12.4.2 "Detailed Initialization Procedure" approximately describes
// class initialization as:
//
// lock(class.lock)
// class.state = initializing
// unlock(class.lock)
//
// invoke <clinit>
//
// lock(class.lock)
// class.state = initialized
// unlock(class.lock) <-- acts as a release
//
// The last operation in the above example acts as an atomic release
// for any stores in <clinit>, which ends up being stricter
// than what a constructor barrier needs.
//
// See also QuasiAtomic::ThreadFenceForConstructor().
bool RequiresConstructorBarrier(Thread* self,
const DexFile* dex_file,
uint16_t class_def_index)
REQUIRES(!requires_constructor_barrier_lock_);
// Are runtime access checks necessary in the compiled code?
bool CanAccessTypeWithoutChecks(ObjPtr<mirror::Class> referrer_class,
ObjPtr<mirror::Class> resolved_class)
REQUIRES_SHARED(Locks::mutator_lock_);
// Are runtime access and instantiable checks necessary in the code?
// out_is_finalizable is set to whether the type is finalizable.
bool CanAccessInstantiableTypeWithoutChecks(ObjPtr<mirror::Class> referrer_class,
ObjPtr<mirror::Class> resolved_class,
bool* out_is_finalizable)
REQUIRES_SHARED(Locks::mutator_lock_);
// Resolve compiling method's class. Returns null on failure.
mirror::Class* ResolveCompilingMethodsClass(
const ScopedObjectAccess& soa, Handle<mirror::DexCache> dex_cache,
Handle<mirror::ClassLoader> class_loader, const DexCompilationUnit* mUnit)
REQUIRES_SHARED(Locks::mutator_lock_);
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, const DexCompilationUnit* mUnit,
uint32_t field_idx, bool is_static)
REQUIRES_SHARED(Locks::mutator_lock_);
// Resolve a field with a given dex file.
ArtField* ResolveFieldWithDexFile(
const ScopedObjectAccess& soa, Handle<mirror::DexCache> dex_cache,
Handle<mirror::ClassLoader> class_loader, const DexFile* dex_file,
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(
mirror::DexCache* dex_cache, mirror::Class* referrer_class,
ArtField* resolved_field, uint16_t field_idx)
REQUIRES_SHARED(Locks::mutator_lock_);
// Resolve a method. Returns null on failure, including incompatible class change.
ArtMethod* ResolveMethod(
ScopedObjectAccess& soa,
Handle<mirror::DexCache> dex_cache,
Handle<mirror::ClassLoader> class_loader,
const DexCompilationUnit* mUnit,
uint32_t method_idx,
InvokeType invoke_type)
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_);
const VerifiedMethod* GetVerifiedMethod(const DexFile* dex_file, uint32_t method_idx) const;
bool IsSafeCast(const DexCompilationUnit* mUnit, uint32_t dex_pc);
bool GetSupportBootImageFixup() const {
return support_boot_image_fixup_;
}
void SetSupportBootImageFixup(bool support_boot_image_fixup) {
support_boot_image_fixup_ = support_boot_image_fixup;
}
void SetCompilerContext(void* compiler_context) {
compiler_context_ = compiler_context;
}
void* GetCompilerContext() const {
return compiler_context_;
}
size_t GetThreadCount() const {
return parallel_thread_count_;
}
bool GetDumpStats() const {
return dump_stats_;
}
bool GetDumpPasses() const {
return dump_passes_;
}
CumulativeLogger* GetTimingsLogger() const {
return timings_logger_;
}
void SetDedupeEnabled(bool dedupe_enabled) {
compiled_method_storage_.SetDedupeEnabled(dedupe_enabled);
}
bool DedupeEnabled() const {
return compiled_method_storage_.DedupeEnabled();
}
// Checks if class specified by type_idx is one of the image_classes_
bool IsImageClass(const char* descriptor) const;
// Checks whether the provided class should be compiled, i.e., is in classes_to_compile_.
bool IsClassToCompile(const char* descriptor) const;
// Checks whether the provided method should be compiled, i.e., is in method_to_compile_.
bool IsMethodToCompile(const MethodReference& method_ref) const;
// Checks whether profile guided compilation is enabled and if the method should be compiled
// according to the profile file.
bool ShouldCompileBasedOnProfile(const MethodReference& method_ref) const;
// 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(ClassReference ref, mirror::Class::Status status);
// Checks if the specified method has been verified without failures. Returns
// false if the method is not in the verification results (GetVerificationResults).
bool IsMethodVerifiedWithoutFailures(uint32_t method_idx,
uint16_t class_def_idx,
const DexFile& dex_file) const;
// Get memory usage during compilation.
std::string GetMemoryUsageString(bool extended) const;
void SetHadHardVerifierFailure() {
had_hard_verifier_failure_ = true;
}
Compiler::Kind GetCompilerKind() {
return compiler_kind_;
}
CompiledMethodStorage* GetCompiledMethodStorage() {
return &compiled_method_storage_;
}
// Can we assume that the klass is loaded?
bool CanAssumeClassIsLoaded(mirror::Class* klass)
REQUIRES_SHARED(Locks::mutator_lock_);
bool MayInline(const DexFile* inlined_from, const DexFile* inlined_into) const {
if (!kIsTargetBuild) {
return MayInlineInternal(inlined_from, inlined_into);
}
return true;
}
void MarkForDexToDexCompilation(Thread* self, const MethodReference& method_ref)
REQUIRES(!dex_to_dex_references_lock_);
const BitVector* GetCurrentDexToDexMethods() const {
return current_dex_to_dex_methods_;
}
const ProfileCompilationInfo* GetProfileCompilationInfo() const {
return profile_compilation_info_;
}
bool CanAssumeVerified(ClassReference ref) const;
private:
void PreCompile(jobject class_loader,
const std::vector<const DexFile*>& dex_files,
TimingLogger* timings)
REQUIRES(!Locks::mutator_lock_);
void LoadImageClasses(TimingLogger* timings) 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) REQUIRES(!Locks::mutator_lock_);
void Compile(jobject class_loader,
const std::vector<const DexFile*>& dex_files,
TimingLogger* timings) REQUIRES(!dex_to_dex_references_lock_);
void CompileDexFile(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_);
bool MayInlineInternal(const DexFile* inlined_from, const DexFile* inlined_into) const;
void InitializeThreadPools();
void FreeThreadPools();
void CheckThreadPools();
bool RequiresConstructorBarrier(const DexFile& dex_file, uint16_t class_def_idx) const;
const CompilerOptions* const compiler_options_;
VerificationResults* const verification_results_;
std::unique_ptr<Compiler> compiler_;
Compiler::Kind compiler_kind_;
const InstructionSet instruction_set_;
const InstructionSetFeatures* const instruction_set_features_;
// All class references that require constructor barriers. If the class reference is not in the
// set then the result has not yet been computed.
mutable ReaderWriterMutex requires_constructor_barrier_lock_ DEFAULT_MUTEX_ACQUIRED_AFTER;
std::map<ClassReference, bool> requires_constructor_barrier_
GUARDED_BY(requires_constructor_barrier_lock_);
// All class references that this compiler has compiled. Indexed by class defs.
using ClassStateTable = AtomicDexRefMap<mirror::Class::Status>;
ClassStateTable compiled_classes_;
typedef AtomicDexRefMap<CompiledMethod*> MethodTable;
private:
// All method references that this compiler has compiled.
MethodTable compiled_methods_;
// Number of non-relative patches in all compiled methods. These patches need space
// in the .oat_patches ELF section if requested in the compiler options.
Atomic<size_t> non_relative_linker_patch_count_;
// If image_ is true, specifies the classes that will be included in the image.
// Note if image_classes_ is null, all classes are included in the image.
std::unique_ptr<std::unordered_set<std::string>> image_classes_;
// Specifies the classes that will be compiled. Note that if classes_to_compile_ is null,
// all classes are eligible for compilation (duplication filters etc. will still apply).
// This option may be restricted to the boot image, depending on a flag in the implementation.
std::unique_ptr<std::unordered_set<std::string>> classes_to_compile_;
// Specifies the methods that will be compiled. Note that if methods_to_compile_ is null,
// all methods are eligible for compilation (compilation filters etc. will still apply).
// This option may be restricted to the boot image, depending on a flag in the implementation.
std::unique_ptr<std::unordered_set<std::string>> methods_to_compile_;
bool had_hard_verifier_failure_;
// A thread pool that can (potentially) run tasks in parallel.
std::unique_ptr<ThreadPool> parallel_thread_pool_;
size_t parallel_thread_count_;
// 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_;
bool dump_stats_;
const bool dump_passes_;
CumulativeLogger* const timings_logger_;
typedef void (*CompilerCallbackFn)(CompilerDriver& driver);
typedef MutexLock* (*CompilerMutexLockFn)(CompilerDriver& driver);
void* compiler_context_;
bool support_boot_image_fixup_;
// List of dex files that will be stored in the oat file.
std::vector<const DexFile*> dex_files_for_oat_file_;
CompiledMethodStorage compiled_method_storage_;
// Info for profile guided compilation.
const ProfileCompilationInfo* const profile_compilation_info_;
size_t max_arena_alloc_;
// Data for delaying dex-to-dex compilation.
Mutex dex_to_dex_references_lock_;
// In the first phase, dex_to_dex_references_ collects methods for dex-to-dex compilation.
class DexFileMethodSet;
std::vector<DexFileMethodSet> dex_to_dex_references_ GUARDED_BY(dex_to_dex_references_lock_);
// In the second phase, current_dex_to_dex_methods_ points to the BitVector with method
// indexes for dex-to-dex compilation in the current dex file.
const BitVector* current_dex_to_dex_methods_;
friend class CompileClassVisitor;
friend class DexToDexDecompilerTest;
friend class verifier::VerifierDepsTest;
DISALLOW_COPY_AND_ASSIGN(CompilerDriver);
};
} // namespace art
#endif // ART_COMPILER_DRIVER_COMPILER_DRIVER_H_