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 #include "field-inl.h" 18 19 #include "class-inl.h" 20 #include "dex_cache-inl.h" 21 #include "object_array-inl.h" 22 #include "object-inl.h" 23 24 namespace art { 25 namespace mirror { 26 27 GcRoot<Class> Field::static_class_; 28 GcRoot<Class> Field::array_class_; 29 30 void Field::SetClass(ObjPtr<Class> klass) { 31 CHECK(static_class_.IsNull()) << static_class_.Read() << " " << klass; 32 CHECK(klass != nullptr); 33 static_class_ = GcRoot<Class>(klass); 34 } 35 36 void Field::ResetClass() { 37 CHECK(!static_class_.IsNull()); 38 static_class_ = GcRoot<Class>(nullptr); 39 } 40 41 void Field::SetArrayClass(ObjPtr<Class> klass) { 42 CHECK(array_class_.IsNull()) << array_class_.Read() << " " << klass; 43 CHECK(klass != nullptr); 44 array_class_ = GcRoot<Class>(klass); 45 } 46 47 void Field::ResetArrayClass() { 48 CHECK(!array_class_.IsNull()); 49 array_class_ = GcRoot<Class>(nullptr); 50 } 51 52 void Field::VisitRoots(RootVisitor* visitor) { 53 static_class_.VisitRootIfNonNull(visitor, RootInfo(kRootStickyClass)); 54 array_class_.VisitRootIfNonNull(visitor, RootInfo(kRootStickyClass)); 55 } 56 57 ArtField* Field::GetArtField() { 58 mirror::Class* declaring_class = GetDeclaringClass(); 59 if (UNLIKELY(declaring_class->IsProxyClass())) { 60 DCHECK(IsStatic()); 61 DCHECK_EQ(declaring_class->NumStaticFields(), 2U); 62 // 0 == Class[] interfaces; 1 == Class[][] throws; 63 if (GetDexFieldIndex() == 0) { 64 return &declaring_class->GetSFieldsPtr()->At(0); 65 } else { 66 DCHECK_EQ(GetDexFieldIndex(), 1U); 67 return &declaring_class->GetSFieldsPtr()->At(1); 68 } 69 } 70 mirror::DexCache* const dex_cache = declaring_class->GetDexCache(); 71 ArtField* art_field = dex_cache->GetResolvedField(GetDexFieldIndex(), kRuntimePointerSize); 72 if (UNLIKELY(art_field == nullptr)) { 73 if (IsStatic()) { 74 art_field = declaring_class->FindDeclaredStaticField(dex_cache, GetDexFieldIndex()); 75 } else { 76 art_field = declaring_class->FindInstanceField(dex_cache, GetDexFieldIndex()); 77 } 78 CHECK(art_field != nullptr); 79 dex_cache->SetResolvedField(GetDexFieldIndex(), art_field, kRuntimePointerSize); 80 } 81 CHECK_EQ(declaring_class, art_field->GetDeclaringClass()); 82 return art_field; 83 } 84 85 } // namespace mirror 86 } // namespace art 87
