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comparison src/share/vm/memory/metadataFactory.hpp @ 6725:da91efe96a93

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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
date Sat, 01 Sep 2012 13:25:18 -0400
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children 59a58e20dc60
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6724:36d1d483d5d6 6725:da91efe96a93
1 /*
2 * Copyright (c) 2010, 2012, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_VM_MEMORY_METADATAFACTORY_HPP
26 #define SHARE_VM_MEMORY_METADATAFACTORY_HPP
27
28 #include "utilities/array.hpp"
29 #include "utilities/exceptions.hpp"
30 #include "utilities/globalDefinitions.hpp"
31
32 class MetadataFactory : AllStatic {
33 public:
34 template <typename T>
35 static Array<T>* new_array(ClassLoaderData* loader_data, int length, TRAPS) {
36 // The "true" argument is because all metadata arrays are read only when
37 // dumped to the shared archive
38 return new (loader_data, length, /*read_only*/true, THREAD) Array<T>(length);
39 }
40
41 template <typename T>
42 static Array<T>* new_array(ClassLoaderData* loader_data, int length, T value, TRAPS) {
43 Array<T>* array = new_array<T>(loader_data, length, CHECK_NULL);
44 for (int i = 0; i < length; i++) {
45 array->at_put(i, value);
46 }
47 return array;
48 }
49
50 template <typename T>
51 static Array<T>* new_writeable_array(ClassLoaderData* loader_data, int length, TRAPS) {
52 return new (loader_data, length, /*read_only*/false, THREAD) Array<T>(length);
53 }
54
55 template <typename T>
56 static Array<T>* new_writeable_array(ClassLoaderData* loader_data, int length, T value, TRAPS) {
57 Array<T>* array = new_writeable_array<T>(loader_data, length, CHECK_NULL);
58 for (int i = 0; i < length; i++) {
59 array->at_put(i, value);
60 }
61 return array;
62 }
63
64 template <typename T>
65 static void free_array(ClassLoaderData* loader_data, Array<T>* data) {
66 if (data != NULL) {
67 assert(loader_data != NULL, "shouldn't pass null");
68 int size = data->size();
69 loader_data->metaspace_non_null()->deallocate((MetaWord*)data, size, false);
70 }
71 }
72
73 // Deallocation method for metadata
74 template <class T>
75 static void free_metadata(ClassLoaderData* loader_data, T md) {
76 if (md != NULL) {
77 assert(loader_data != NULL, "shouldn't pass null");
78 int size = md->size();
79 // Call metadata's deallocate function which will call deallocate fields
80 assert(!md->on_stack(), "can't deallocate things on stack");
81 md->deallocate_contents(loader_data);
82 loader_data->metaspace_non_null()->deallocate((MetaWord*)md, size, md->is_klass());
83 }
84 }
85 };
86
87 #endif // SHARE_VM_MEMORY_METADATAFACTORY_HPP