Mercurial > hg > truffle
diff src/share/vm/memory/metadataFactory.hpp @ 6725:da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes
Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland
Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
author | coleenp |
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date | Sat, 01 Sep 2012 13:25:18 -0400 |
parents | |
children | 59a58e20dc60 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/vm/memory/metadataFactory.hpp Sat Sep 01 13:25:18 2012 -0400 @@ -0,0 +1,87 @@ +/* + * Copyright (c) 2010, 2012, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + * + */ + +#ifndef SHARE_VM_MEMORY_METADATAFACTORY_HPP +#define SHARE_VM_MEMORY_METADATAFACTORY_HPP + +#include "utilities/array.hpp" +#include "utilities/exceptions.hpp" +#include "utilities/globalDefinitions.hpp" + +class MetadataFactory : AllStatic { + public: + template <typename T> + static Array<T>* new_array(ClassLoaderData* loader_data, int length, TRAPS) { + // The "true" argument is because all metadata arrays are read only when + // dumped to the shared archive + return new (loader_data, length, /*read_only*/true, THREAD) Array<T>(length); + } + + template <typename T> + static Array<T>* new_array(ClassLoaderData* loader_data, int length, T value, TRAPS) { + Array<T>* array = new_array<T>(loader_data, length, CHECK_NULL); + for (int i = 0; i < length; i++) { + array->at_put(i, value); + } + return array; + } + + template <typename T> + static Array<T>* new_writeable_array(ClassLoaderData* loader_data, int length, TRAPS) { + return new (loader_data, length, /*read_only*/false, THREAD) Array<T>(length); + } + + template <typename T> + static Array<T>* new_writeable_array(ClassLoaderData* loader_data, int length, T value, TRAPS) { + Array<T>* array = new_writeable_array<T>(loader_data, length, CHECK_NULL); + for (int i = 0; i < length; i++) { + array->at_put(i, value); + } + return array; + } + + template <typename T> + static void free_array(ClassLoaderData* loader_data, Array<T>* data) { + if (data != NULL) { + assert(loader_data != NULL, "shouldn't pass null"); + int size = data->size(); + loader_data->metaspace_non_null()->deallocate((MetaWord*)data, size, false); + } + } + + // Deallocation method for metadata + template <class T> + static void free_metadata(ClassLoaderData* loader_data, T md) { + if (md != NULL) { + assert(loader_data != NULL, "shouldn't pass null"); + int size = md->size(); + // Call metadata's deallocate function which will call deallocate fields + assert(!md->on_stack(), "can't deallocate things on stack"); + md->deallocate_contents(loader_data); + loader_data->metaspace_non_null()->deallocate((MetaWord*)md, size, md->is_klass()); + } + } +}; + +#endif // SHARE_VM_MEMORY_METADATAFACTORY_HPP