author | rehn |
Thu, 07 Jun 2018 14:11:56 +0200 | |
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parent 49824 | e242740a92b8 |
child 50599 | ecc2af326b5f |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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#include "precompiled.hpp" |
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#include "classfile/systemDictionary.hpp" |
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#include "classfile/stringTable.hpp" |
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#include "gc/shared/oopStorage.hpp" |
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#include "oops/access.inline.hpp" |
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#include "oops/oop.hpp" |
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#include "oops/weakHandle.inline.hpp" |
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#include "utilities/debug.hpp" |
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#include "utilities/ostream.hpp" |
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template <> OopStorage* WeakHandle<vm_class_loader_data>::get_storage() { |
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return SystemDictionary::vm_weak_oop_storage(); |
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} |
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template <> OopStorage* WeakHandle<vm_string_table_data>::get_storage() { |
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return StringTable::weak_storage(); |
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} |
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template <WeakHandleType T> |
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WeakHandle<T> WeakHandle<T>::create(Handle obj) { |
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assert(obj() != NULL, "no need to create weak null oop"); |
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oop* oop_addr = get_storage()->allocate(); |
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if (oop_addr == NULL) { |
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vm_exit_out_of_memory(sizeof(oop*), OOM_MALLOC_ERROR, "Unable to create new weak oop handle in OopStorage"); |
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} |
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// Create WeakHandle with address returned and store oop into it. |
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RootAccess<ON_PHANTOM_OOP_REF>::oop_store(oop_addr, obj()); |
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return WeakHandle(oop_addr); |
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} |
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template <WeakHandleType T> |
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void WeakHandle<T>::release() const { |
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// Only release if the pointer to the object has been created. |
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if (_obj != NULL) { |
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// Clear the WeakHandle. For race in creating ClassLoaderData, we can release this |
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// WeakHandle before it is cleared by GC. |
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RootAccess<ON_PHANTOM_OOP_REF>::oop_store(_obj, (oop)NULL); |
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get_storage()->release(_obj); |
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} |
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} |
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template <WeakHandleType T> |
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void WeakHandle<T>::print() const { print_on(tty); } |
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template <WeakHandleType T> |
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void WeakHandle<T>::print_on(outputStream* st) const { |
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st->print("WeakHandle: " PTR_FORMAT, p2i(peek())); |
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} |
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// Provide instantiation. |
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template class WeakHandle<vm_class_loader_data>; |
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template class WeakHandle<vm_string_table_data>; |
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