1 /* 2 * Copyright (C) 2011 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef ART_RUNTIME_MIRROR_CLASS_LOADER_H_ 18 #define ART_RUNTIME_MIRROR_CLASS_LOADER_H_ 19 20 #include "object.h" 21 22 namespace art { 23 24 struct ClassLoaderOffsets; 25 class ClassTable; 26 27 namespace mirror { 28 29 class Class; 30 31 // C++ mirror of java.lang.ClassLoader 32 class MANAGED ClassLoader : public Object { 33 public: 34 // Size of an instance of java.lang.ClassLoader. InstanceSize()35 static constexpr uint32_t InstanceSize() { 36 return sizeof(ClassLoader); 37 } 38 GetParent()39 ClassLoader* GetParent() SHARED_REQUIRES(Locks::mutator_lock_) { 40 return GetFieldObject<ClassLoader>(OFFSET_OF_OBJECT_MEMBER(ClassLoader, parent_)); 41 } 42 GetClassTable()43 ClassTable* GetClassTable() SHARED_REQUIRES(Locks::mutator_lock_) { 44 return reinterpret_cast<ClassTable*>( 45 GetField64(OFFSET_OF_OBJECT_MEMBER(ClassLoader, class_table_))); 46 } 47 SetClassTable(ClassTable * class_table)48 void SetClassTable(ClassTable* class_table) SHARED_REQUIRES(Locks::mutator_lock_) { 49 SetField64<false>(OFFSET_OF_OBJECT_MEMBER(ClassLoader, class_table_), 50 reinterpret_cast<uint64_t>(class_table)); 51 } 52 GetAllocator()53 LinearAlloc* GetAllocator() SHARED_REQUIRES(Locks::mutator_lock_) { 54 return reinterpret_cast<LinearAlloc*>( 55 GetField64(OFFSET_OF_OBJECT_MEMBER(ClassLoader, allocator_))); 56 } 57 SetAllocator(LinearAlloc * allocator)58 void SetAllocator(LinearAlloc* allocator) SHARED_REQUIRES(Locks::mutator_lock_) { 59 SetField64<false>(OFFSET_OF_OBJECT_MEMBER(ClassLoader, allocator_), 60 reinterpret_cast<uint64_t>(allocator)); 61 } 62 63 private: 64 // Visit instance fields of the class loader as well as its associated classes. 65 // Null class loader is handled by ClassLinker::VisitClassRoots. 66 template <bool kVisitClasses, 67 VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags, 68 ReadBarrierOption kReadBarrierOption = kWithReadBarrier, 69 typename Visitor> 70 void VisitReferences(mirror::Class* klass, const Visitor& visitor) 71 SHARED_REQUIRES(Locks::mutator_lock_) 72 REQUIRES(!Locks::classlinker_classes_lock_); 73 74 // Field order required by test "ValidateFieldOrderOfJavaCppUnionClasses". 75 HeapReference<Object> packages_; 76 HeapReference<ClassLoader> parent_; 77 HeapReference<Object> proxyCache_; 78 // Native pointer to class table, need to zero this out when image writing. 79 uint32_t padding_ ATTRIBUTE_UNUSED; 80 uint64_t allocator_; 81 uint64_t class_table_; 82 83 friend struct art::ClassLoaderOffsets; // for verifying offset information 84 friend class Object; // For VisitReferences 85 DISALLOW_IMPLICIT_CONSTRUCTORS(ClassLoader); 86 }; 87 88 } // namespace mirror 89 } // namespace art 90 91 #endif // ART_RUNTIME_MIRROR_CLASS_LOADER_H_ 92