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_REFVISITOR_INL_H_ 18 #define ART_RUNTIME_MIRROR_CLASS_REFVISITOR_INL_H_ 19 20 #include "class-inl.h" 21 22 #include "art_field-inl.h" 23 #include "class_ext-inl.h" 24 25 namespace art { 26 namespace mirror { 27 28 template <bool kVisitNativeRoots, 29 VerifyObjectFlags kVerifyFlags, 30 ReadBarrierOption kReadBarrierOption, 31 typename Visitor> 32 inline void Class::VisitReferences(ObjPtr<Class> klass, const Visitor& visitor) { 33 VisitInstanceFieldsReferences<kVerifyFlags, kReadBarrierOption>(klass.Ptr(), visitor); 34 // Right after a class is allocated, but not yet loaded 35 // (kStatusNotReady, see ClassLinker::LoadClass()), GC may find it 36 // and scan it. IsTemp() may call Class::GetAccessFlags() but may 37 // fail in the DCHECK in Class::GetAccessFlags() because the class 38 // status is kStatusNotReady. To avoid it, rely on IsResolved() 39 // only. This is fine because a temp class never goes into the 40 // kStatusResolved state. 41 if (IsResolved<kVerifyFlags>()) { 42 // Temp classes don't ever populate imt/vtable or static fields and they are not even 43 // allocated with the right size for those. Also, unresolved classes don't have fields 44 // linked yet. 45 VisitStaticFieldsReferences<kVerifyFlags, kReadBarrierOption>(this, visitor); 46 } 47 if (kVisitNativeRoots) { 48 // Since this class is reachable, we must also visit the associated roots when we scan it. 49 VisitNativeRoots<kReadBarrierOption>( 50 visitor, Runtime::Current()->GetClassLinker()->GetImagePointerSize()); 51 } 52 } 53 54 template<ReadBarrierOption kReadBarrierOption, class Visitor> 55 void Class::VisitNativeRoots(Visitor& visitor, PointerSize pointer_size) { 56 for (ArtField& field : GetSFieldsUnchecked()) { 57 // Visit roots first in case the declaring class gets moved. 58 field.VisitRoots(visitor); 59 if (kIsDebugBuild && IsResolved()) { 60 CHECK_EQ(field.GetDeclaringClass<kReadBarrierOption>(), this) << GetStatus(); 61 } 62 } 63 for (ArtField& field : GetIFieldsUnchecked()) { 64 // Visit roots first in case the declaring class gets moved. 65 field.VisitRoots(visitor); 66 if (kIsDebugBuild && IsResolved()) { 67 CHECK_EQ(field.GetDeclaringClass<kReadBarrierOption>(), this) << GetStatus(); 68 } 69 } 70 for (ArtMethod& method : GetMethods(pointer_size)) { 71 method.VisitRoots<kReadBarrierOption>(visitor, pointer_size); 72 } 73 ObjPtr<ClassExt> ext(GetExtData<kDefaultVerifyFlags, kReadBarrierOption>()); 74 if (!ext.IsNull()) { 75 ext->VisitNativeRoots<kReadBarrierOption, Visitor>(visitor, pointer_size); 76 } 77 } 78 79 } // namespace mirror 80 } // namespace art 81 82 #endif // ART_RUNTIME_MIRROR_CLASS_REFVISITOR_INL_H_ 83
