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_OBJECT_REFVISITOR_INL_H_ 18 #define ART_RUNTIME_MIRROR_OBJECT_REFVISITOR_INL_H_ 19 20 #include "object-inl.h" 21 22 #include "class-refvisitor-inl.h" 23 #include "class_loader-inl.h" 24 #include "dex_cache-inl.h" 25 26 namespace art { 27 namespace mirror { 28 29 template <bool kVisitNativeRoots, 30 VerifyObjectFlags kVerifyFlags, 31 ReadBarrierOption kReadBarrierOption, 32 typename Visitor, 33 typename JavaLangRefVisitor> 34 inline void Object::VisitReferences(const Visitor& visitor, 35 const JavaLangRefVisitor& ref_visitor) { 36 visitor(this, ClassOffset(), /* is_static= */ false); 37 ObjPtr<Class> klass = GetClass<kVerifyFlags, kReadBarrierOption>(); 38 const uint32_t class_flags = klass->GetClassFlags<kVerifyNone>(); 39 if (LIKELY(class_flags == kClassFlagNormal)) { 40 DCHECK((!klass->IsVariableSize<kVerifyFlags>())); 41 VisitInstanceFieldsReferences<kVerifyFlags, kReadBarrierOption>(klass, visitor); 42 DCHECK((!klass->IsClassClass<kVerifyFlags>())); 43 DCHECK(!klass->IsStringClass<kVerifyFlags>()); 44 DCHECK(!klass->IsClassLoaderClass<kVerifyFlags>()); 45 DCHECK((!klass->IsArrayClass<kVerifyFlags>())); 46 } else { 47 if ((class_flags & kClassFlagNoReferenceFields) == 0) { 48 DCHECK(!klass->IsStringClass<kVerifyFlags>()); 49 if (class_flags == kClassFlagClass) { 50 DCHECK((klass->IsClassClass<kVerifyFlags>())); 51 ObjPtr<Class> as_klass = AsClass<kVerifyNone>(); 52 as_klass->VisitReferences<kVisitNativeRoots, kVerifyFlags, kReadBarrierOption>(klass, 53 visitor); 54 } else if (class_flags == kClassFlagObjectArray) { 55 DCHECK((klass->IsObjectArrayClass<kVerifyFlags>())); 56 AsObjectArray<mirror::Object, kVerifyNone>()->VisitReferences(visitor); 57 } else if ((class_flags & kClassFlagReference) != 0) { 58 VisitInstanceFieldsReferences<kVerifyFlags, kReadBarrierOption>(klass, visitor); 59 ref_visitor(klass, AsReference<kVerifyFlags, kReadBarrierOption>()); 60 } else if (class_flags == kClassFlagDexCache) { 61 ObjPtr<mirror::DexCache> const dex_cache = AsDexCache<kVerifyFlags, kReadBarrierOption>(); 62 dex_cache->VisitReferences<kVisitNativeRoots, 63 kVerifyFlags, 64 kReadBarrierOption>(klass, visitor); 65 } else { 66 ObjPtr<mirror::ClassLoader> const class_loader = 67 AsClassLoader<kVerifyFlags, kReadBarrierOption>(); 68 class_loader->VisitReferences<kVisitNativeRoots, 69 kVerifyFlags, 70 kReadBarrierOption>(klass, visitor); 71 } 72 } else if (kIsDebugBuild) { 73 CHECK((!klass->IsClassClass<kVerifyFlags>())); 74 CHECK((!klass->IsObjectArrayClass<kVerifyFlags>())); 75 // String still has instance fields for reflection purposes but these don't exist in 76 // actual string instances. 77 if (!klass->IsStringClass<kVerifyFlags>()) { 78 size_t total_reference_instance_fields = 0; 79 ObjPtr<Class> super_class = klass; 80 do { 81 total_reference_instance_fields += 82 super_class->NumReferenceInstanceFields<kVerifyFlags>(); 83 super_class = super_class->GetSuperClass<kVerifyFlags, kReadBarrierOption>(); 84 } while (super_class != nullptr); 85 // The only reference field should be the object's class. This field is handled at the 86 // beginning of the function. 87 CHECK_EQ(total_reference_instance_fields, 1u); 88 } 89 } 90 } 91 } 92 93 } // namespace mirror 94 } // namespace art 95 96 #endif // ART_RUNTIME_MIRROR_OBJECT_REFVISITOR_INL_H_ 97