| /* |
| * 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_RUNTIME_CLASS_LINKER_H_ |
| #define ART_RUNTIME_CLASS_LINKER_H_ |
| |
| #include <string> |
| #include <utility> |
| #include <vector> |
| |
| #include "base/allocator.h" |
| #include "base/hash_set.h" |
| #include "base/macros.h" |
| #include "base/mutex.h" |
| #include "class_table.h" |
| #include "dex_file.h" |
| #include "gc_root.h" |
| #include "jni.h" |
| #include "oat_file.h" |
| #include "object_callbacks.h" |
| |
| namespace art { |
| |
| namespace gc { |
| namespace space { |
| class ImageSpace; |
| } // namespace space |
| } // namespace gc |
| namespace mirror { |
| class ClassLoader; |
| class DexCache; |
| class DexCachePointerArray; |
| class DexCacheTest_Open_Test; |
| class IfTable; |
| template<class T> class ObjectArray; |
| class StackTraceElement; |
| } // namespace mirror |
| |
| template<class T> class Handle; |
| template<class T> class MutableHandle; |
| class InternTable; |
| template<class T> class ObjectLock; |
| class Runtime; |
| class ScopedObjectAccessAlreadyRunnable; |
| template<size_t kNumReferences> class PACKED(4) StackHandleScope; |
| |
| enum VisitRootFlags : uint8_t; |
| |
| class ClassLoaderVisitor { |
| public: |
| virtual ~ClassLoaderVisitor() {} |
| virtual void Visit(mirror::ClassLoader* class_loader) |
| SHARED_REQUIRES(Locks::classlinker_classes_lock_, Locks::mutator_lock_) = 0; |
| }; |
| |
| class ClassLinker { |
| public: |
| // Well known mirror::Class roots accessed via GetClassRoot. |
| enum ClassRoot { |
| kJavaLangClass, |
| kJavaLangObject, |
| kClassArrayClass, |
| kObjectArrayClass, |
| kJavaLangString, |
| kJavaLangDexCache, |
| kJavaLangRefReference, |
| kJavaLangReflectConstructor, |
| kJavaLangReflectField, |
| kJavaLangReflectMethod, |
| kJavaLangReflectProxy, |
| kJavaLangStringArrayClass, |
| kJavaLangReflectConstructorArrayClass, |
| kJavaLangReflectFieldArrayClass, |
| kJavaLangReflectMethodArrayClass, |
| kJavaLangClassLoader, |
| kJavaLangThrowable, |
| kJavaLangClassNotFoundException, |
| kJavaLangStackTraceElement, |
| kPrimitiveBoolean, |
| kPrimitiveByte, |
| kPrimitiveChar, |
| kPrimitiveDouble, |
| kPrimitiveFloat, |
| kPrimitiveInt, |
| kPrimitiveLong, |
| kPrimitiveShort, |
| kPrimitiveVoid, |
| kBooleanArrayClass, |
| kByteArrayClass, |
| kCharArrayClass, |
| kDoubleArrayClass, |
| kFloatArrayClass, |
| kIntArrayClass, |
| kLongArrayClass, |
| kShortArrayClass, |
| kJavaLangStackTraceElementArrayClass, |
| kClassRootsMax, |
| }; |
| |
| explicit ClassLinker(InternTable* intern_table); |
| ~ClassLinker(); |
| |
| // Initialize class linker by bootstraping from dex files. |
| void InitWithoutImage(std::vector<std::unique_ptr<const DexFile>> boot_class_path) |
| SHARED_REQUIRES(Locks::mutator_lock_) |
| REQUIRES(!dex_lock_); |
| |
| // Initialize class linker from one or more images. |
| void InitFromImage() SHARED_REQUIRES(Locks::mutator_lock_) REQUIRES(!dex_lock_); |
| |
| // Finds a class by its descriptor, loading it if necessary. |
| // If class_loader is null, searches boot_class_path_. |
| mirror::Class* FindClass(Thread* self, |
| const char* descriptor, |
| Handle<mirror::ClassLoader> class_loader) |
| SHARED_REQUIRES(Locks::mutator_lock_) |
| REQUIRES(!dex_lock_); |
| |
| // Finds a class in the path class loader, loading it if necessary without using JNI. Hash |
| // function is supposed to be ComputeModifiedUtf8Hash(descriptor). Returns true if the |
| // class-loader chain could be handled, false otherwise, i.e., a non-supported class-loader |
| // was encountered while walking the parent chain (currently only BootClassLoader and |
| // PathClassLoader are supported). |
| bool FindClassInPathClassLoader(ScopedObjectAccessAlreadyRunnable& soa, |
| Thread* self, |
| const char* descriptor, |
| size_t hash, |
| Handle<mirror::ClassLoader> class_loader, |
| mirror::Class** result) |
| SHARED_REQUIRES(Locks::mutator_lock_) |
| REQUIRES(!dex_lock_); |
| |
| // Finds a class by its descriptor using the "system" class loader, ie by searching the |
| // boot_class_path_. |
| mirror::Class* FindSystemClass(Thread* self, const char* descriptor) |
| SHARED_REQUIRES(Locks::mutator_lock_) |
| REQUIRES(!dex_lock_); |
| |
| // Finds the array class given for the element class. |
| mirror::Class* FindArrayClass(Thread* self, mirror::Class** element_class) |
| SHARED_REQUIRES(Locks::mutator_lock_) |
| REQUIRES(!dex_lock_); |
| |
| // Returns true if the class linker is initialized. |
| bool IsInitialized() const { |
| return init_done_; |
| } |
| |
| // Define a new a class based on a ClassDef from a DexFile |
| mirror::Class* DefineClass(Thread* self, |
| const char* descriptor, |
| size_t hash, |
| Handle<mirror::ClassLoader> class_loader, |
| const DexFile& dex_file, |
| const DexFile::ClassDef& dex_class_def) |
| SHARED_REQUIRES(Locks::mutator_lock_) |
| REQUIRES(!dex_lock_); |
| |
| // Finds a class by its descriptor, returning null if it isn't wasn't loaded |
| // by the given 'class_loader'. |
| mirror::Class* LookupClass(Thread* self, |
| const char* descriptor, |
| size_t hash, |
| mirror::ClassLoader* class_loader) |
| REQUIRES(!Locks::classlinker_classes_lock_) |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| |
| // Finds all the classes with the given descriptor, regardless of ClassLoader. |
| void LookupClasses(const char* descriptor, std::vector<mirror::Class*>& classes) |
| REQUIRES(!Locks::classlinker_classes_lock_) |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| |
| mirror::Class* FindPrimitiveClass(char type) SHARED_REQUIRES(Locks::mutator_lock_); |
| |
| // General class unloading is not supported, this is used to prune |
| // unwanted classes during image writing. |
| bool RemoveClass(const char* descriptor, mirror::ClassLoader* class_loader) |
| REQUIRES(!Locks::classlinker_classes_lock_) |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| |
| void DumpAllClasses(int flags) |
| REQUIRES(!Locks::classlinker_classes_lock_) |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| |
| void DumpForSigQuit(std::ostream& os) REQUIRES(!Locks::classlinker_classes_lock_); |
| |
| size_t NumLoadedClasses() |
| REQUIRES(!Locks::classlinker_classes_lock_) |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| |
| // Resolve a String with the given index from the DexFile, storing the |
| // result in the DexCache. The referrer is used to identify the |
| // target DexCache and ClassLoader to use for resolution. |
| mirror::String* ResolveString(uint32_t string_idx, ArtMethod* referrer) |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| |
| // Resolve a String with the given index from the DexFile, storing the |
| // result in the DexCache. |
| mirror::String* ResolveString(const DexFile& dex_file, uint32_t string_idx, |
| Handle<mirror::DexCache> dex_cache) |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| |
| // Resolve a Type with the given index from the DexFile, storing the |
| // result in the DexCache. The referrer is used to identity the |
| // target DexCache and ClassLoader to use for resolution. |
| mirror::Class* ResolveType(const DexFile& dex_file, uint16_t type_idx, mirror::Class* referrer) |
| SHARED_REQUIRES(Locks::mutator_lock_) |
| REQUIRES(!dex_lock_, !Roles::uninterruptible_); |
| |
| // Resolve a Type with the given index from the DexFile, storing the |
| // result in the DexCache. The referrer is used to identify the |
| // target DexCache and ClassLoader to use for resolution. |
| mirror::Class* ResolveType(uint16_t type_idx, ArtMethod* referrer) |
| SHARED_REQUIRES(Locks::mutator_lock_) |
| REQUIRES(!dex_lock_, !Roles::uninterruptible_); |
| |
| mirror::Class* ResolveType(uint16_t type_idx, ArtField* referrer) |
| SHARED_REQUIRES(Locks::mutator_lock_) |
| REQUIRES(!dex_lock_, !Roles::uninterruptible_); |
| |
| // Resolve a type with the given ID from the DexFile, storing the |
| // result in DexCache. The ClassLoader is used to search for the |
| // type, since it may be referenced from but not contained within |
| // the given DexFile. |
| mirror::Class* ResolveType(const DexFile& dex_file, |
| uint16_t type_idx, |
| Handle<mirror::DexCache> dex_cache, |
| Handle<mirror::ClassLoader> class_loader) |
| SHARED_REQUIRES(Locks::mutator_lock_) |
| REQUIRES(!dex_lock_, !Roles::uninterruptible_); |
| |
| // Resolve a method with a given ID from the DexFile, storing the |
| // result in DexCache. The ClassLinker and ClassLoader are used as |
| // in ResolveType. What is unique is the method type argument which |
| // is used to determine if this method is a direct, static, or |
| // virtual method. |
| ArtMethod* ResolveMethod(const DexFile& dex_file, |
| uint32_t method_idx, |
| Handle<mirror::DexCache> dex_cache, |
| Handle<mirror::ClassLoader> class_loader, |
| ArtMethod* referrer, |
| InvokeType type) |
| SHARED_REQUIRES(Locks::mutator_lock_) |
| REQUIRES(!dex_lock_, !Roles::uninterruptible_); |
| |
| ArtMethod* GetResolvedMethod(uint32_t method_idx, ArtMethod* referrer) |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| ArtMethod* ResolveMethod(Thread* self, uint32_t method_idx, ArtMethod* referrer, InvokeType type) |
| SHARED_REQUIRES(Locks::mutator_lock_) |
| REQUIRES(!dex_lock_, !Roles::uninterruptible_); |
| ArtMethod* ResolveMethodWithoutInvokeType(const DexFile& dex_file, |
| uint32_t method_idx, |
| Handle<mirror::DexCache> dex_cache, |
| Handle<mirror::ClassLoader> class_loader) |
| SHARED_REQUIRES(Locks::mutator_lock_) |
| REQUIRES(!dex_lock_, !Roles::uninterruptible_); |
| |
| ArtField* GetResolvedField(uint32_t field_idx, mirror::Class* field_declaring_class) |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| ArtField* GetResolvedField(uint32_t field_idx, mirror::DexCache* dex_cache) |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| ArtField* ResolveField(uint32_t field_idx, ArtMethod* referrer, bool is_static) |
| SHARED_REQUIRES(Locks::mutator_lock_) |
| REQUIRES(!dex_lock_, !Roles::uninterruptible_); |
| |
| // Resolve a field with a given ID from the DexFile, storing the |
| // result in DexCache. The ClassLinker and ClassLoader are used as |
| // in ResolveType. What is unique is the is_static argument which is |
| // used to determine if we are resolving a static or non-static |
| // field. |
| ArtField* ResolveField(const DexFile& dex_file, uint32_t field_idx, |
| Handle<mirror::DexCache> dex_cache, |
| Handle<mirror::ClassLoader> class_loader, bool is_static) |
| SHARED_REQUIRES(Locks::mutator_lock_) |
| REQUIRES(!dex_lock_, !Roles::uninterruptible_); |
| |
| // Resolve a field with a given ID from the DexFile, storing the |
| // result in DexCache. The ClassLinker and ClassLoader are used as |
| // in ResolveType. No is_static argument is provided so that Java |
| // field resolution semantics are followed. |
| ArtField* ResolveFieldJLS(const DexFile& dex_file, |
| uint32_t field_idx, |
| Handle<mirror::DexCache> dex_cache, |
| Handle<mirror::ClassLoader> class_loader) |
| SHARED_REQUIRES(Locks::mutator_lock_) |
| REQUIRES(!dex_lock_, !Roles::uninterruptible_); |
| |
| // Get shorty from method index without resolution. Used to do handlerization. |
| const char* MethodShorty(uint32_t method_idx, ArtMethod* referrer, uint32_t* length) |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| |
| // Returns true on success, false if there's an exception pending. |
| // can_run_clinit=false allows the compiler to attempt to init a class, |
| // given the restriction that no <clinit> execution is possible. |
| bool EnsureInitialized(Thread* self, |
| Handle<mirror::Class> c, |
| bool can_init_fields, |
| bool can_init_parents) |
| SHARED_REQUIRES(Locks::mutator_lock_) |
| REQUIRES(!dex_lock_, !Roles::uninterruptible_); |
| |
| // Initializes classes that have instances in the image but that have |
| // <clinit> methods so they could not be initialized by the compiler. |
| void RunRootClinits() |
| SHARED_REQUIRES(Locks::mutator_lock_) |
| REQUIRES(!dex_lock_, !Roles::uninterruptible_); |
| |
| mirror::DexCache* RegisterDexFile(const DexFile& dex_file) |
| REQUIRES(!dex_lock_) |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| void RegisterDexFile(const DexFile& dex_file, Handle<mirror::DexCache> dex_cache) |
| REQUIRES(!dex_lock_) |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| |
| const OatFile* RegisterOatFile(const OatFile* oat_file) |
| REQUIRES(!dex_lock_); |
| |
| const std::vector<const DexFile*>& GetBootClassPath() { |
| return boot_class_path_; |
| } |
| |
| // Returns the first non-image oat file in the class path. |
| const OatFile* GetPrimaryOatFile() |
| REQUIRES(!dex_lock_); |
| |
| void VisitClasses(ClassVisitor* visitor) |
| REQUIRES(!Locks::classlinker_classes_lock_) |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| |
| // Less efficient variant of VisitClasses that copies the class_table_ into secondary storage |
| // so that it can visit individual classes without holding the doesn't hold the |
| // Locks::classlinker_classes_lock_. As the Locks::classlinker_classes_lock_ isn't held this code |
| // can race with insertion and deletion of classes while the visitor is being called. |
| void VisitClassesWithoutClassesLock(ClassVisitor* visitor) |
| SHARED_REQUIRES(Locks::mutator_lock_) |
| REQUIRES(!dex_lock_); |
| |
| void VisitClassRoots(RootVisitor* visitor, VisitRootFlags flags) |
| REQUIRES(!Locks::classlinker_classes_lock_) |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| void VisitRoots(RootVisitor* visitor, VisitRootFlags flags) |
| REQUIRES(!dex_lock_) |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| |
| mirror::DexCache* FindDexCache(Thread* self, |
| const DexFile& dex_file, |
| bool allow_failure = false) |
| REQUIRES(!dex_lock_) |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| void FixupDexCaches(ArtMethod* resolution_method) |
| REQUIRES(!dex_lock_) |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| |
| // Finds or creates the oat file holding dex_location. Then loads and returns |
| // all corresponding dex files (there may be more than one dex file loaded |
| // in the case of multidex). |
| // This may return the original, unquickened dex files if the oat file could |
| // not be generated. |
| // |
| // Returns an empty vector if the dex files could not be loaded. In this |
| // case, there will be at least one error message returned describing why no |
| // dex files could not be loaded. The 'error_msgs' argument must not be |
| // null, regardless of whether there is an error or not. |
| // |
| // This method should not be called with the mutator_lock_ held, because it |
| // could end up starving GC if we need to generate or relocate any oat |
| // files. |
| std::vector<std::unique_ptr<const DexFile>> OpenDexFilesFromOat( |
| const char* dex_location, |
| const char* oat_location, |
| std::vector<std::string>* error_msgs) |
| REQUIRES(!dex_lock_, !Locks::mutator_lock_); |
| |
| // Allocate an instance of a java.lang.Object. |
| mirror::Object* AllocObject(Thread* self) |
| SHARED_REQUIRES(Locks::mutator_lock_) |
| REQUIRES(!Roles::uninterruptible_); |
| |
| // TODO: replace this with multiple methods that allocate the correct managed type. |
| template <class T> |
| mirror::ObjectArray<T>* AllocObjectArray(Thread* self, size_t length) |
| SHARED_REQUIRES(Locks::mutator_lock_) |
| REQUIRES(!Roles::uninterruptible_); |
| |
| mirror::ObjectArray<mirror::Class>* AllocClassArray(Thread* self, size_t length) |
| SHARED_REQUIRES(Locks::mutator_lock_) |
| REQUIRES(!Roles::uninterruptible_); |
| |
| mirror::ObjectArray<mirror::String>* AllocStringArray(Thread* self, size_t length) |
| SHARED_REQUIRES(Locks::mutator_lock_) |
| REQUIRES(!Roles::uninterruptible_); |
| |
| LengthPrefixedArray<ArtField>* AllocArtFieldArray(Thread* self, |
| LinearAlloc* allocator, |
| size_t length); |
| |
| LengthPrefixedArray<ArtMethod>* AllocArtMethodArray(Thread* self, |
| LinearAlloc* allocator, |
| size_t length); |
| |
| mirror::PointerArray* AllocPointerArray(Thread* self, size_t length) |
| SHARED_REQUIRES(Locks::mutator_lock_) |
| REQUIRES(!Roles::uninterruptible_); |
| |
| mirror::IfTable* AllocIfTable(Thread* self, size_t ifcount) |
| SHARED_REQUIRES(Locks::mutator_lock_) |
| REQUIRES(!Roles::uninterruptible_); |
| |
| mirror::ObjectArray<mirror::StackTraceElement>* AllocStackTraceElementArray(Thread* self, |
| size_t length) |
| SHARED_REQUIRES(Locks::mutator_lock_) |
| REQUIRES(!Roles::uninterruptible_); |
| |
| void VerifyClass(Thread* self, Handle<mirror::Class> klass) |
| SHARED_REQUIRES(Locks::mutator_lock_) |
| REQUIRES(!dex_lock_); |
| bool VerifyClassUsingOatFile(const DexFile& dex_file, |
| mirror::Class* klass, |
| mirror::Class::Status& oat_file_class_status) |
| SHARED_REQUIRES(Locks::mutator_lock_) |
| REQUIRES(!dex_lock_); |
| void ResolveClassExceptionHandlerTypes(const DexFile& dex_file, |
| Handle<mirror::Class> klass) |
| SHARED_REQUIRES(Locks::mutator_lock_) |
| REQUIRES(!dex_lock_); |
| void ResolveMethodExceptionHandlerTypes(const DexFile& dex_file, ArtMethod* klass) |
| SHARED_REQUIRES(Locks::mutator_lock_) |
| REQUIRES(!dex_lock_); |
| |
| mirror::Class* CreateProxyClass(ScopedObjectAccessAlreadyRunnable& soa, |
| jstring name, |
| jobjectArray interfaces, |
| jobject loader, |
| jobjectArray methods, |
| jobjectArray throws) |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| std::string GetDescriptorForProxy(mirror::Class* proxy_class) |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| ArtMethod* FindMethodForProxy(mirror::Class* proxy_class, ArtMethod* proxy_method) |
| REQUIRES(!dex_lock_) |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| |
| // Get the oat code for a method when its class isn't yet initialized |
| const void* GetQuickOatCodeFor(ArtMethod* method) |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| |
| // Get the oat code for a method from a method index. |
| const void* GetQuickOatCodeFor(const DexFile& dex_file, |
| uint16_t class_def_idx, |
| uint32_t method_idx) |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| |
| // Get compiled code for a method, return null if no code |
| // exists. This is unlike Get..OatCodeFor which will return a bridge |
| // or interpreter entrypoint. |
| const void* GetOatMethodQuickCodeFor(ArtMethod* method) |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| |
| const OatFile::OatMethod FindOatMethodFor(ArtMethod* method, bool* found) |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| |
| pid_t GetClassesLockOwner(); // For SignalCatcher. |
| pid_t GetDexLockOwner(); // For SignalCatcher. |
| |
| mirror::Class* GetClassRoot(ClassRoot class_root) SHARED_REQUIRES(Locks::mutator_lock_); |
| |
| static const char* GetClassRootDescriptor(ClassRoot class_root); |
| |
| // Is the given entry point quick code to run the resolution stub? |
| bool IsQuickResolutionStub(const void* entry_point) const; |
| |
| // Is the given entry point quick code to bridge into the interpreter? |
| bool IsQuickToInterpreterBridge(const void* entry_point) const; |
| |
| // Is the given entry point quick code to run the generic JNI stub? |
| bool IsQuickGenericJniStub(const void* entry_point) const; |
| |
| InternTable* GetInternTable() const { |
| return intern_table_; |
| } |
| |
| // Set the entrypoints up for method to the given code. |
| void SetEntryPointsToCompiledCode(ArtMethod* method, const void* method_code) const |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| |
| // Set the entrypoints up for method to the enter the interpreter. |
| void SetEntryPointsToInterpreter(ArtMethod* method) const |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| |
| // Attempts to insert a class into a class table. Returns null if |
| // the class was inserted, otherwise returns an existing class with |
| // the same descriptor and ClassLoader. |
| mirror::Class* InsertClass(const char* descriptor, mirror::Class* klass, size_t hash) |
| REQUIRES(!Locks::classlinker_classes_lock_) |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| |
| mirror::ObjectArray<mirror::Class>* GetClassRoots() SHARED_REQUIRES(Locks::mutator_lock_) { |
| mirror::ObjectArray<mirror::Class>* class_roots = class_roots_.Read(); |
| DCHECK(class_roots != nullptr); |
| return class_roots; |
| } |
| |
| // Move all of the image classes into the class table for faster lookups. |
| void MoveImageClassesToClassTable() |
| REQUIRES(!Locks::classlinker_classes_lock_) |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| // Move the class table to the pre-zygote table to reduce memory usage. This works by ensuring |
| // that no more classes are ever added to the pre zygote table which makes it that the pages |
| // always remain shared dirty instead of private dirty. |
| void MoveClassTableToPreZygote() |
| REQUIRES(!Locks::classlinker_classes_lock_) |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| |
| // Returns true if the method can be called with its direct code pointer, false otherwise. |
| bool MayBeCalledWithDirectCodePointer(ArtMethod* m) |
| SHARED_REQUIRES(Locks::mutator_lock_) REQUIRES(!dex_lock_); |
| |
| // Creates a GlobalRef PathClassLoader that can be used to load classes from the given dex files. |
| // Note: the objects are not completely set up. Do not use this outside of tests and the compiler. |
| jobject CreatePathClassLoader(Thread* self, std::vector<const DexFile*>& dex_files) |
| SHARED_REQUIRES(Locks::mutator_lock_) |
| REQUIRES(!dex_lock_); |
| |
| size_t GetImagePointerSize() const { |
| DCHECK(ValidPointerSize(image_pointer_size_)) << image_pointer_size_; |
| return image_pointer_size_; |
| } |
| |
| // Used by image writer for checking. |
| bool ClassInClassTable(mirror::Class* klass) |
| REQUIRES(Locks::classlinker_classes_lock_) |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| |
| ArtMethod* CreateRuntimeMethod(); |
| |
| // Clear the ArrayClass cache. This is necessary when cleaning up for the image, as the cache |
| // entries are roots, but potentially not image classes. |
| void DropFindArrayClassCache() SHARED_REQUIRES(Locks::mutator_lock_); |
| |
| // Clean up class loaders, this needs to happen after JNI weak globals are cleared. |
| void CleanupClassLoaders() |
| SHARED_REQUIRES(Locks::mutator_lock_) |
| REQUIRES(!Locks::classlinker_classes_lock_); |
| |
| static LinearAlloc* GetAllocatorForClassLoader(mirror::ClassLoader* class_loader) |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| |
| private: |
| struct ClassLoaderData { |
| jweak weak_root; // Weak root to enable class unloading. |
| ClassTable* class_table; |
| LinearAlloc* allocator; |
| }; |
| |
| void VisitClassLoaders(ClassLoaderVisitor* visitor) const |
| SHARED_REQUIRES(Locks::classlinker_classes_lock_, Locks::mutator_lock_); |
| |
| void VisitClassesInternal(ClassVisitor* visitor) |
| SHARED_REQUIRES(Locks::classlinker_classes_lock_, Locks::mutator_lock_); |
| |
| // Returns the number of zygote and image classes. |
| size_t NumZygoteClasses() const |
| REQUIRES(Locks::classlinker_classes_lock_) |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| |
| // Returns the number of non zygote nor image classes. |
| size_t NumNonZygoteClasses() const |
| REQUIRES(Locks::classlinker_classes_lock_) |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| |
| OatFile& GetImageOatFile(gc::space::ImageSpace* space) |
| REQUIRES(!dex_lock_) |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| |
| void FinishInit(Thread* self) |
| SHARED_REQUIRES(Locks::mutator_lock_) |
| REQUIRES(!dex_lock_, !Roles::uninterruptible_); |
| |
| // For early bootstrapping by Init |
| mirror::Class* AllocClass(Thread* self, mirror::Class* java_lang_Class, uint32_t class_size) |
| SHARED_REQUIRES(Locks::mutator_lock_) |
| REQUIRES(!Roles::uninterruptible_); |
| |
| // Alloc* convenience functions to avoid needing to pass in mirror::Class* |
| // values that are known to the ClassLinker such as |
| // kObjectArrayClass and kJavaLangString etc. |
| mirror::Class* AllocClass(Thread* self, uint32_t class_size) |
| SHARED_REQUIRES(Locks::mutator_lock_) |
| REQUIRES(!Roles::uninterruptible_); |
| mirror::DexCache* AllocDexCache(Thread* self, const DexFile& dex_file) |
| SHARED_REQUIRES(Locks::mutator_lock_) |
| REQUIRES(!Roles::uninterruptible_); |
| |
| mirror::Class* CreatePrimitiveClass(Thread* self, Primitive::Type type) |
| SHARED_REQUIRES(Locks::mutator_lock_) |
| REQUIRES(!Roles::uninterruptible_); |
| mirror::Class* InitializePrimitiveClass(mirror::Class* primitive_class, Primitive::Type type) |
| SHARED_REQUIRES(Locks::mutator_lock_) |
| REQUIRES(!Roles::uninterruptible_); |
| |
| mirror::Class* CreateArrayClass(Thread* self, |
| const char* descriptor, |
| size_t hash, |
| Handle<mirror::ClassLoader> class_loader) |
| SHARED_REQUIRES(Locks::mutator_lock_) |
| REQUIRES(!dex_lock_, !Roles::uninterruptible_); |
| |
| void AppendToBootClassPath(Thread* self, const DexFile& dex_file) |
| SHARED_REQUIRES(Locks::mutator_lock_) |
| REQUIRES(!dex_lock_); |
| void AppendToBootClassPath(const DexFile& dex_file, Handle<mirror::DexCache> dex_cache) |
| SHARED_REQUIRES(Locks::mutator_lock_) |
| REQUIRES(!dex_lock_); |
| |
| // Precomputes size needed for Class, in the case of a non-temporary class this size must be |
| // sufficient to hold all static fields. |
| uint32_t SizeOfClassWithoutEmbeddedTables(const DexFile& dex_file, |
| const DexFile::ClassDef& dex_class_def); |
| |
| // Setup the classloader, class def index, type idx so that we can insert this class in the class |
| // table. |
| void SetupClass(const DexFile& dex_file, |
| const DexFile::ClassDef& dex_class_def, |
| Handle<mirror::Class> klass, |
| mirror::ClassLoader* class_loader) |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| |
| void LoadClass(Thread* self, |
| const DexFile& dex_file, |
| const DexFile::ClassDef& dex_class_def, |
| Handle<mirror::Class> klass) |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| void LoadClassMembers(Thread* self, |
| const DexFile& dex_file, |
| const uint8_t* class_data, |
| Handle<mirror::Class> klass, |
| const OatFile::OatClass* oat_class) |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| |
| void LoadField(const ClassDataItemIterator& it, Handle<mirror::Class> klass, ArtField* dst) |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| |
| void LoadMethod(Thread* self, |
| const DexFile& dex_file, |
| const ClassDataItemIterator& it, |
| Handle<mirror::Class> klass, ArtMethod* dst) |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| |
| void FixupStaticTrampolines(mirror::Class* klass) SHARED_REQUIRES(Locks::mutator_lock_); |
| |
| // Finds the associated oat class for a dex_file and descriptor. Returns an invalid OatClass on |
| // error and sets found to false. |
| OatFile::OatClass FindOatClass(const DexFile& dex_file, uint16_t class_def_idx, bool* found) |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| |
| void RegisterDexFileLocked(const DexFile& dex_file, Handle<mirror::DexCache> dex_cache) |
| REQUIRES(dex_lock_) |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| mirror::DexCache* FindDexCacheLocked(Thread* self, const DexFile& dex_file, bool allow_failure) |
| REQUIRES(dex_lock_) |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| |
| bool InitializeClass(Thread* self, |
| Handle<mirror::Class> klass, |
| bool can_run_clinit, |
| bool can_init_parents) |
| SHARED_REQUIRES(Locks::mutator_lock_) |
| REQUIRES(!dex_lock_); |
| bool WaitForInitializeClass(Handle<mirror::Class> klass, |
| Thread* self, |
| ObjectLock<mirror::Class>& lock); |
| bool ValidateSuperClassDescriptors(Handle<mirror::Class> klass) |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| |
| bool IsSameDescriptorInDifferentClassContexts(Thread* self, |
| const char* descriptor, |
| Handle<mirror::ClassLoader> class_loader1, |
| Handle<mirror::ClassLoader> class_loader2) |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| |
| bool IsSameMethodSignatureInDifferentClassContexts(Thread* self, |
| ArtMethod* method, |
| mirror::Class* klass1, |
| mirror::Class* klass2) |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| |
| bool LinkClass(Thread* self, |
| const char* descriptor, |
| Handle<mirror::Class> klass, |
| Handle<mirror::ObjectArray<mirror::Class>> interfaces, |
| MutableHandle<mirror::Class>* h_new_class_out) |
| SHARED_REQUIRES(Locks::mutator_lock_) |
| REQUIRES(!Locks::classlinker_classes_lock_); |
| |
| bool LinkSuperClass(Handle<mirror::Class> klass) |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| |
| bool LoadSuperAndInterfaces(Handle<mirror::Class> klass, const DexFile& dex_file) |
| SHARED_REQUIRES(Locks::mutator_lock_) |
| REQUIRES(!dex_lock_); |
| |
| bool LinkMethods(Thread* self, |
| Handle<mirror::Class> klass, |
| Handle<mirror::ObjectArray<mirror::Class>> interfaces, |
| ArtMethod** out_imt) |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| |
| bool LinkVirtualMethods(Thread* self, Handle<mirror::Class> klass) |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| |
| bool LinkInterfaceMethods(Thread* self, |
| Handle<mirror::Class> klass, |
| Handle<mirror::ObjectArray<mirror::Class>> interfaces, |
| ArtMethod** out_imt) |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| |
| bool LinkStaticFields(Thread* self, Handle<mirror::Class> klass, size_t* class_size) |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| bool LinkInstanceFields(Thread* self, Handle<mirror::Class> klass) |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| bool LinkFields(Thread* self, Handle<mirror::Class> klass, bool is_static, size_t* class_size) |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| void LinkCode(ArtMethod* method, |
| const OatFile::OatClass* oat_class, |
| uint32_t class_def_method_index) |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| void CreateReferenceInstanceOffsets(Handle<mirror::Class> klass) |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| |
| void CheckProxyConstructor(ArtMethod* constructor) const |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| void CheckProxyMethod(ArtMethod* method, ArtMethod* prototype) const |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| |
| // For use by ImageWriter to find DexCaches for its roots |
| ReaderWriterMutex* DexLock() |
| SHARED_REQUIRES(Locks::mutator_lock_) |
| LOCK_RETURNED(dex_lock_) { |
| return &dex_lock_; |
| } |
| size_t GetDexCacheCount() SHARED_REQUIRES(Locks::mutator_lock_, dex_lock_) { |
| return dex_caches_.size(); |
| } |
| const std::list<jweak>& GetDexCaches() SHARED_REQUIRES(Locks::mutator_lock_, dex_lock_) { |
| return dex_caches_; |
| } |
| |
| const OatFile* FindOpenedOatFileFromOatLocation(const std::string& oat_location) |
| REQUIRES(!dex_lock_); |
| |
| // Returns the boot image oat file. |
| const OatFile* GetBootOatFile() SHARED_REQUIRES(dex_lock_); |
| |
| void CreateProxyConstructor(Handle<mirror::Class> klass, ArtMethod* out) |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| void CreateProxyMethod(Handle<mirror::Class> klass, ArtMethod* prototype, ArtMethod* out) |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| |
| // Ensures that methods have the kAccPreverified bit set. We use the kAccPreverfied bit on the |
| // class access flags to determine whether this has been done before. |
| void EnsurePreverifiedMethods(Handle<mirror::Class> c) |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| |
| mirror::Class* LookupClassFromImage(const char* descriptor) |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| |
| // Returns null if not found. |
| ClassTable* ClassTableForClassLoader(mirror::ClassLoader* class_loader) |
| SHARED_REQUIRES(Locks::mutator_lock_, Locks::classlinker_classes_lock_); |
| // Insert a new class table if not found. |
| ClassTable* InsertClassTableForClassLoader(mirror::ClassLoader* class_loader) |
| SHARED_REQUIRES(Locks::mutator_lock_) |
| REQUIRES(Locks::classlinker_classes_lock_); |
| |
| // EnsureResolved is called to make sure that a class in the class_table_ has been resolved |
| // before returning it to the caller. Its the responsibility of the thread that placed the class |
| // in the table to make it resolved. The thread doing resolution must notify on the class' lock |
| // when resolution has occurred. This happens in mirror::Class::SetStatus. As resolution may |
| // retire a class, the version of the class in the table is returned and this may differ from |
| // the class passed in. |
| mirror::Class* EnsureResolved(Thread* self, const char* descriptor, mirror::Class* klass) |
| WARN_UNUSED |
| SHARED_REQUIRES(Locks::mutator_lock_) |
| REQUIRES(!dex_lock_); |
| |
| void FixupTemporaryDeclaringClass(mirror::Class* temp_class, mirror::Class* new_class) |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| |
| void SetClassRoot(ClassRoot class_root, mirror::Class* klass) |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| |
| // Return the quick generic JNI stub for testing. |
| const void* GetRuntimeQuickGenericJniStub() const; |
| |
| // Throw the class initialization failure recorded when first trying to initialize the given |
| // class. |
| // Note: Currently we only store the descriptor, so we cannot throw the exact throwable, only |
| // a recreation with a custom string. |
| void ThrowEarlierClassFailure(mirror::Class* c) |
| SHARED_REQUIRES(Locks::mutator_lock_) |
| REQUIRES(!dex_lock_); |
| |
| // Check for duplicate class definitions of the given oat file against all open oat files. |
| bool HasCollisions(const OatFile* oat_file, std::string* error_msg) REQUIRES(!dex_lock_); |
| |
| bool HasInitWithString(Thread* self, const char* descriptor) |
| SHARED_REQUIRES(Locks::mutator_lock_) REQUIRES(!dex_lock_); |
| |
| bool CanWeInitializeClass(mirror::Class* klass, bool can_init_statics, bool can_init_parents) |
| SHARED_REQUIRES(Locks::mutator_lock_); |
| |
| void UpdateClassVirtualMethods(mirror::Class* klass, |
| LengthPrefixedArray<ArtMethod>* new_methods) |
| SHARED_REQUIRES(Locks::mutator_lock_) |
| REQUIRES(!Locks::classlinker_classes_lock_); |
| |
| std::vector<const DexFile*> boot_class_path_; |
| std::vector<std::unique_ptr<const DexFile>> opened_dex_files_; |
| |
| mutable ReaderWriterMutex dex_lock_ DEFAULT_MUTEX_ACQUIRED_AFTER; |
| // JNI weak globals to allow dex caches to get unloaded. We lazily delete weak globals when we |
| // register new dex files. |
| std::list<jweak> dex_caches_ GUARDED_BY(dex_lock_); |
| std::vector<const OatFile*> oat_files_ GUARDED_BY(dex_lock_); |
| |
| // This contains the class loaders which have class tables. It is populated by |
| // InsertClassTableForClassLoader. |
| std::list<ClassLoaderData> class_loaders_ |
| GUARDED_BY(Locks::classlinker_classes_lock_); |
| |
| // Boot class path table. Since the class loader for this is null. |
| ClassTable boot_class_table_ GUARDED_BY(Locks::classlinker_classes_lock_); |
| |
| // New class roots, only used by CMS since the GC needs to mark these in the pause. |
| std::vector<GcRoot<mirror::Class>> new_class_roots_ GUARDED_BY(Locks::classlinker_classes_lock_); |
| |
| // Do we need to search dex caches to find image classes? |
| bool dex_cache_image_class_lookup_required_; |
| // Number of times we've searched dex caches for a class. After a certain number of misses we move |
| // the classes into the class_table_ to avoid dex cache based searches. |
| Atomic<uint32_t> failed_dex_cache_class_lookups_; |
| |
| // Well known mirror::Class roots. |
| GcRoot<mirror::ObjectArray<mirror::Class>> class_roots_; |
| |
| // The interface table used by all arrays. |
| GcRoot<mirror::IfTable> array_iftable_; |
| |
| // A cache of the last FindArrayClass results. The cache serves to avoid creating array class |
| // descriptors for the sake of performing FindClass. |
| static constexpr size_t kFindArrayCacheSize = 16; |
| GcRoot<mirror::Class> find_array_class_cache_[kFindArrayCacheSize]; |
| size_t find_array_class_cache_next_victim_; |
| |
| bool init_done_; |
| bool log_new_class_table_roots_ GUARDED_BY(Locks::classlinker_classes_lock_); |
| |
| InternTable* intern_table_; |
| |
| // Trampolines within the image the bounce to runtime entrypoints. Done so that there is a single |
| // patch point within the image. TODO: make these proper relocations. |
| const void* quick_resolution_trampoline_; |
| const void* quick_imt_conflict_trampoline_; |
| const void* quick_generic_jni_trampoline_; |
| const void* quick_to_interpreter_bridge_trampoline_; |
| |
| // Image pointer size. |
| size_t image_pointer_size_; |
| |
| friend class ImageWriter; // for GetClassRoots |
| friend class ImageDumper; // for FindOpenedOatFileFromOatLocation |
| friend class JniCompilerTest; // for GetRuntimeQuickGenericJniStub |
| friend class JniInternalTest; // for GetRuntimeQuickGenericJniStub |
| ART_FRIEND_TEST(mirror::DexCacheTest, Open); // for AllocDexCache |
| |
| DISALLOW_COPY_AND_ASSIGN(ClassLinker); |
| }; |
| |
| } // namespace art |
| |
| #endif // ART_RUNTIME_CLASS_LINKER_H_ |