blob: e3cb12f16f7dc4d05311fc71e8afdf0fe8f67ed1 [file] [log] [blame]
/*
* 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_LOADER_H_
#define ART_RUNTIME_MIRROR_CLASS_LOADER_H_
#include "base/mutex.h"
#include "obj_ptr.h"
#include "object.h"
#include "object_reference.h"
namespace art {
struct ClassLoaderOffsets;
class ClassTable;
class LinearAlloc;
namespace mirror {
class Class;
// C++ mirror of java.lang.ClassLoader
class MANAGED ClassLoader : public Object {
public:
// Size of an instance of java.lang.ClassLoader.
static constexpr uint32_t InstanceSize() {
return sizeof(ClassLoader);
}
ClassLoader* GetParent() REQUIRES_SHARED(Locks::mutator_lock_) {
return GetFieldObject<ClassLoader>(OFFSET_OF_OBJECT_MEMBER(ClassLoader, parent_));
}
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
ClassTable* GetClassTable() REQUIRES_SHARED(Locks::mutator_lock_) {
return reinterpret_cast<ClassTable*>(
GetField64<kVerifyFlags>(OFFSET_OF_OBJECT_MEMBER(ClassLoader, class_table_)));
}
void SetClassTable(ClassTable* class_table) REQUIRES_SHARED(Locks::mutator_lock_) {
SetField64<false>(OFFSET_OF_OBJECT_MEMBER(ClassLoader, class_table_),
reinterpret_cast<uint64_t>(class_table));
}
LinearAlloc* GetAllocator() REQUIRES_SHARED(Locks::mutator_lock_) {
return reinterpret_cast<LinearAlloc*>(
GetField64(OFFSET_OF_OBJECT_MEMBER(ClassLoader, allocator_)));
}
void SetAllocator(LinearAlloc* allocator) REQUIRES_SHARED(Locks::mutator_lock_) {
SetField64<false>(OFFSET_OF_OBJECT_MEMBER(ClassLoader, allocator_),
reinterpret_cast<uint64_t>(allocator));
}
private:
// Visit instance fields of the class loader as well as its associated classes.
// Null class loader is handled by ClassLinker::VisitClassRoots.
template <bool kVisitClasses,
VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags,
ReadBarrierOption kReadBarrierOption = kWithReadBarrier,
typename Visitor>
void VisitReferences(ObjPtr<Class> klass, const Visitor& visitor)
REQUIRES_SHARED(Locks::mutator_lock_)
REQUIRES(!Locks::classlinker_classes_lock_);
// Field order required by test "ValidateFieldOrderOfJavaCppUnionClasses".
HeapReference<Object> packages_;
HeapReference<ClassLoader> parent_;
HeapReference<Object> proxyCache_;
// Native pointer to class table, need to zero this out when image writing.
uint32_t padding_ ATTRIBUTE_UNUSED;
uint64_t allocator_;
uint64_t class_table_;
friend struct art::ClassLoaderOffsets; // for verifying offset information
friend class Object; // For VisitReferences
DISALLOW_IMPLICIT_CONSTRUCTORS(ClassLoader);
};
} // namespace mirror
} // namespace art
#endif // ART_RUNTIME_MIRROR_CLASS_LOADER_H_