1 /* 2 * Copyright (C) 2015 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_FIELD_H_ 18 #define ART_RUNTIME_MIRROR_FIELD_H_ 19 20 #include "accessible_object.h" 21 #include "base/enums.h" 22 #include "dex/modifiers.h" 23 #include "dex/primitive.h" 24 #include "obj_ptr.h" 25 #include "object.h" 26 #include "read_barrier_option.h" 27 28 namespace art { 29 30 class ArtField; 31 struct FieldOffsets; 32 33 namespace mirror { 34 35 class Class; 36 class String; 37 38 // C++ mirror of java.lang.reflect.Field. 39 class MANAGED Field : public AccessibleObject { 40 public: GetDexFieldIndex()41 ALWAYS_INLINE uint32_t GetDexFieldIndex() REQUIRES_SHARED(Locks::mutator_lock_) { 42 return GetField32(OFFSET_OF_OBJECT_MEMBER(Field, dex_field_index_)); 43 } 44 45 ObjPtr<mirror::Class> GetDeclaringClass() REQUIRES_SHARED(Locks::mutator_lock_); 46 GetAccessFlags()47 uint32_t GetAccessFlags() REQUIRES_SHARED(Locks::mutator_lock_) { 48 return GetField32(OFFSET_OF_OBJECT_MEMBER(Field, access_flags_)); 49 } 50 IsStatic()51 bool IsStatic() REQUIRES_SHARED(Locks::mutator_lock_) { 52 return (GetAccessFlags() & kAccStatic) != 0; 53 } 54 IsFinal()55 bool IsFinal() REQUIRES_SHARED(Locks::mutator_lock_) { 56 return (GetAccessFlags() & kAccFinal) != 0; 57 } 58 IsVolatile()59 bool IsVolatile() REQUIRES_SHARED(Locks::mutator_lock_) { 60 return (GetAccessFlags() & kAccVolatile) != 0; 61 } 62 63 ALWAYS_INLINE Primitive::Type GetTypeAsPrimitiveType() REQUIRES_SHARED(Locks::mutator_lock_); 64 65 ObjPtr<mirror::Class> GetType() REQUIRES_SHARED(Locks::mutator_lock_); 66 GetOffset()67 int32_t GetOffset() REQUIRES_SHARED(Locks::mutator_lock_) { 68 return GetField32(OFFSET_OF_OBJECT_MEMBER(Field, offset_)); 69 } 70 71 // Slow, try to use only for PrettyField and such. 72 ArtField* GetArtField() REQUIRES_SHARED(Locks::mutator_lock_); 73 74 template <PointerSize kPointerSize, bool kTransactionActive = false> 75 static ObjPtr<mirror::Field> CreateFromArtField(Thread* self, 76 ArtField* field, 77 bool force_resolve) 78 REQUIRES_SHARED(Locks::mutator_lock_) REQUIRES(!Roles::uninterruptible_); 79 80 private: 81 // Padding required for matching alignment with the Java peer. 82 uint8_t padding_[2]; 83 84 HeapReference<mirror::Class> declaring_class_; 85 HeapReference<mirror::Class> type_; 86 int32_t access_flags_; 87 int32_t dex_field_index_; 88 int32_t offset_; 89 90 template<bool kTransactionActive> 91 void SetDeclaringClass(ObjPtr<mirror::Class> c) REQUIRES_SHARED(Locks::mutator_lock_); 92 93 template<bool kTransactionActive> 94 void SetType(ObjPtr<mirror::Class> type) REQUIRES_SHARED(Locks::mutator_lock_); 95 96 template<bool kTransactionActive> SetAccessFlags(uint32_t flags)97 void SetAccessFlags(uint32_t flags) REQUIRES_SHARED(Locks::mutator_lock_) { 98 SetField32<kTransactionActive>(OFFSET_OF_OBJECT_MEMBER(Field, access_flags_), flags); 99 } 100 101 template<bool kTransactionActive> SetDexFieldIndex(uint32_t idx)102 void SetDexFieldIndex(uint32_t idx) REQUIRES_SHARED(Locks::mutator_lock_) { 103 SetField32<kTransactionActive>(OFFSET_OF_OBJECT_MEMBER(Field, dex_field_index_), idx); 104 } 105 106 template<bool kTransactionActive> SetOffset(uint32_t offset)107 void SetOffset(uint32_t offset) REQUIRES_SHARED(Locks::mutator_lock_) { 108 SetField32<kTransactionActive>(OFFSET_OF_OBJECT_MEMBER(Field, offset_), offset); 109 } 110 111 friend struct art::FieldOffsets; // for verifying offset information 112 DISALLOW_IMPLICIT_CONSTRUCTORS(Field); 113 }; 114 115 } // namespace mirror 116 } // namespace art 117 118 #endif // ART_RUNTIME_MIRROR_FIELD_H_ 119