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_INL_H_ 18 #define ART_RUNTIME_MIRROR_FIELD_INL_H_ 19 20 #include "field.h" 21 22 #include "art_field-inl.h" 23 #include "class-alloc-inl.h" 24 #include "class_root.h" 25 #include "dex_cache-inl.h" 26 #include "object-inl.h" 27 28 namespace art { 29 30 namespace mirror { 31 32 inline ObjPtr<mirror::Class> Field::GetDeclaringClass() REQUIRES_SHARED(Locks::mutator_lock_) { 33 return GetFieldObject<Class>(OFFSET_OF_OBJECT_MEMBER(Field, declaring_class_)); 34 } 35 36 inline Primitive::Type Field::GetTypeAsPrimitiveType() { 37 return GetType()->GetPrimitiveType(); 38 } 39 40 inline ObjPtr<mirror::Class> Field::GetType() { 41 return GetFieldObject<mirror::Class>(OFFSET_OF_OBJECT_MEMBER(Field, type_)); 42 } 43 44 template <PointerSize kPointerSize, bool kTransactionActive> 45 inline ObjPtr<mirror::Field> Field::CreateFromArtField(Thread* self, 46 ArtField* field, 47 bool force_resolve) { 48 StackHandleScope<2> hs(self); 49 // Try to resolve type before allocating since this is a thread suspension point. 50 Handle<mirror::Class> type = hs.NewHandle(field->ResolveType()); 51 52 if (type == nullptr) { 53 if (force_resolve) { 54 if (kIsDebugBuild) { 55 self->AssertPendingException(); 56 } 57 return nullptr; 58 } else { 59 // Can't resolve, clear the exception if it isn't OOME and continue with a null type. 60 mirror::Throwable* exception = self->GetException(); 61 if (exception->GetClass()->DescriptorEquals("Ljava/lang/OutOfMemoryError;")) { 62 return nullptr; 63 } 64 self->ClearException(); 65 } 66 } 67 auto ret = hs.NewHandle(ObjPtr<Field>::DownCast(GetClassRoot<Field>()->AllocObject(self))); 68 if (UNLIKELY(ret == nullptr)) { 69 self->AssertPendingOOMException(); 70 return nullptr; 71 } 72 auto dex_field_index = field->GetDexFieldIndex(); 73 auto* resolved_field = field->GetDexCache()->GetResolvedField(dex_field_index, kPointerSize); 74 if (field->GetDeclaringClass()->IsProxyClass()) { 75 DCHECK(field->IsStatic()); 76 DCHECK_LT(dex_field_index, 2U); 77 // The two static fields (interfaces, throws) of all proxy classes 78 // share the same dex file indices 0 and 1. So, we can't resolve 79 // them in the dex cache. 80 } else { 81 if (resolved_field != nullptr) { 82 DCHECK_EQ(resolved_field, field); 83 } else { 84 // We rely on the field being resolved so that we can back to the ArtField 85 // (i.e. FromReflectedMethod). 86 field->GetDexCache()->SetResolvedField(dex_field_index, field, kPointerSize); 87 } 88 } 89 ret->SetType<kTransactionActive>(type.Get()); 90 ret->SetDeclaringClass<kTransactionActive>(field->GetDeclaringClass()); 91 ret->SetAccessFlags<kTransactionActive>(field->GetAccessFlags()); 92 ret->SetDexFieldIndex<kTransactionActive>(dex_field_index); 93 ret->SetOffset<kTransactionActive>(field->GetOffset().Int32Value()); 94 return ret.Get(); 95 } 96 97 template<bool kTransactionActive> 98 inline void Field::SetDeclaringClass(ObjPtr<mirror::Class> c) { 99 SetFieldObject<kTransactionActive>(OFFSET_OF_OBJECT_MEMBER(Field, declaring_class_), c); 100 } 101 102 template<bool kTransactionActive> 103 inline void Field::SetType(ObjPtr<mirror::Class> type) { 104 SetFieldObject<kTransactionActive>(OFFSET_OF_OBJECT_MEMBER(Field, type_), type); 105 } 106 107 } // namespace mirror 108 } // namespace art 109 110 #endif // ART_RUNTIME_MIRROR_FIELD_INL_H_ 111