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/*
* Copyright (C) 2011 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ART_RUNTIME_MIRROR_CLASS_REFVISITOR_INL_H_
#define ART_RUNTIME_MIRROR_CLASS_REFVISITOR_INL_H_
#include "class-inl.h"
#include "art_field-inl.h"
#include "class_ext-inl.h"
namespace art {
namespace mirror {
template <bool kVisitNativeRoots,
VerifyObjectFlags kVerifyFlags,
ReadBarrierOption kReadBarrierOption,
typename Visitor>
inline void Class::VisitReferences(ObjPtr<Class> klass, const Visitor& visitor) {
VisitInstanceFieldsReferences<kVerifyFlags, kReadBarrierOption>(klass.Ptr(), visitor);
// Right after a class is allocated, but not yet loaded
// (ClassStatus::kNotReady, see ClassLinker::LoadClass()), GC may find it
// and scan it. IsTemp() may call Class::GetAccessFlags() but may
// fail in the DCHECK in Class::GetAccessFlags() because the class
// status is ClassStatus::kNotReady. To avoid it, rely on IsResolved()
// only. This is fine because a temp class never goes into the
// ClassStatus::kResolved state.
if (IsResolved<kVerifyFlags>()) {
// Temp classes don't ever populate imt/vtable or static fields and they are not even
// allocated with the right size for those. Also, unresolved classes don't have fields
// linked yet.
VisitStaticFieldsReferences<kVerifyFlags, kReadBarrierOption>(this, visitor);
}
if (kVisitNativeRoots) {
// Since this class is reachable, we must also visit the associated roots when we scan it.
VisitNativeRoots<kReadBarrierOption>(
visitor, Runtime::Current()->GetClassLinker()->GetImagePointerSize());
}
}
template<ReadBarrierOption kReadBarrierOption, class Visitor>
void Class::VisitNativeRoots(Visitor& visitor, PointerSize pointer_size) {
VisitFields<kReadBarrierOption>([&](ArtField* field) REQUIRES_SHARED(art::Locks::mutator_lock_) {
field->VisitRoots(visitor);
if (kIsDebugBuild && IsResolved()) {
CHECK_EQ(field->GetDeclaringClass<kReadBarrierOption>(), this)
<< GetStatus() << field->GetDeclaringClass()->PrettyClass() << " != " << PrettyClass();
}
});
// Don't use VisitMethods because we don't want to hit the class-ext methods twice.
for (ArtMethod& method : GetMethods(pointer_size)) {
method.VisitRoots<kReadBarrierOption>(visitor, pointer_size);
}
ObjPtr<ClassExt> ext(GetExtData<kDefaultVerifyFlags, kReadBarrierOption>());
if (!ext.IsNull()) {
ext->VisitNativeRoots<kReadBarrierOption, Visitor>(visitor, pointer_size);
}
}
template<ReadBarrierOption kReadBarrierOption, class Visitor>
void Class::VisitMethods(Visitor visitor, PointerSize pointer_size) {
for (ArtMethod& method : GetMethods(pointer_size)) {
visitor(&method);
}
ObjPtr<ClassExt> ext(GetExtData<kDefaultVerifyFlags, kReadBarrierOption>());
if (!ext.IsNull()) {
ext->VisitMethods<kReadBarrierOption, Visitor>(visitor, pointer_size);
}
}
template<ReadBarrierOption kReadBarrierOption, class Visitor>
void Class::VisitFields(Visitor visitor) {
for (ArtField& sfield : GetSFieldsUnchecked()) {
visitor(&sfield);
}
for (ArtField& ifield : GetIFieldsUnchecked()) {
visitor(&ifield);
}
}
} // namespace mirror
} // namespace art
#endif // ART_RUNTIME_MIRROR_CLASS_REFVISITOR_INL_H_