2 * Copyright (C) 2011 The Android Open Source Project
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
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
17 #ifndef ART_RUNTIME_MIRROR_CLASS_REFVISITOR_INL_H_
18 #define ART_RUNTIME_MIRROR_CLASS_REFVISITOR_INL_H_
20 #include "class-inl.h"
22 #include "class_ext-inl.h"
27 template <bool kVisitNativeRoots,
28 VerifyObjectFlags kVerifyFlags,
29 ReadBarrierOption kReadBarrierOption,
31 inline void Class::VisitReferences(ObjPtr<Class> klass, const Visitor& visitor) {
32 VisitInstanceFieldsReferences<kVerifyFlags, kReadBarrierOption>(klass.Ptr(), visitor);
33 // Right after a class is allocated, but not yet loaded
34 // (kStatusNotReady, see ClassLinker::LoadClass()), GC may find it
35 // and scan it. IsTemp() may call Class::GetAccessFlags() but may
36 // fail in the DCHECK in Class::GetAccessFlags() because the class
37 // status is kStatusNotReady. To avoid it, rely on IsResolved()
38 // only. This is fine because a temp class never goes into the
39 // kStatusResolved state.
40 if (IsResolved<kVerifyFlags>()) {
41 // Temp classes don't ever populate imt/vtable or static fields and they are not even
42 // allocated with the right size for those. Also, unresolved classes don't have fields
44 VisitStaticFieldsReferences<kVerifyFlags, kReadBarrierOption>(this, visitor);
46 if (kVisitNativeRoots) {
47 // Since this class is reachable, we must also visit the associated roots when we scan it.
48 VisitNativeRoots<kReadBarrierOption>(
49 visitor, Runtime::Current()->GetClassLinker()->GetImagePointerSize());
53 template<ReadBarrierOption kReadBarrierOption, class Visitor>
54 void Class::VisitNativeRoots(Visitor& visitor, PointerSize pointer_size) {
55 for (ArtField& field : GetSFieldsUnchecked()) {
56 // Visit roots first in case the declaring class gets moved.
57 field.VisitRoots(visitor);
58 if (kIsDebugBuild && IsResolved()) {
59 CHECK_EQ(field.GetDeclaringClass<kReadBarrierOption>(), this) << GetStatus();
62 for (ArtField& field : GetIFieldsUnchecked()) {
63 // Visit roots first in case the declaring class gets moved.
64 field.VisitRoots(visitor);
65 if (kIsDebugBuild && IsResolved()) {
66 CHECK_EQ(field.GetDeclaringClass<kReadBarrierOption>(), this) << GetStatus();
69 for (ArtMethod& method : GetMethods(pointer_size)) {
70 method.VisitRoots<kReadBarrierOption>(visitor, pointer_size);
72 ObjPtr<ClassExt> ext(GetExtData<kDefaultVerifyFlags, kReadBarrierOption>());
74 ext->VisitNativeRoots<kReadBarrierOption, Visitor>(visitor, pointer_size);
81 #endif // ART_RUNTIME_MIRROR_CLASS_REFVISITOR_INL_H_