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