1/*
2 * Copyright (c) 2010, 2013, 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 "classfile/classLoaderData.hpp"
29#include "utilities/array.hpp"
30#include "utilities/exceptions.hpp"
31#include "utilities/globalDefinitions.hpp"
32
33class MetadataFactory : AllStatic {
34 public:
35  template <typename T>
36  static Array<T>* new_array(ClassLoaderData* loader_data, int length, TRAPS) {
37    // The "true" argument is because all metadata arrays are read only when
38    // dumped to the shared archive
39    return new (loader_data, length, /*read_only*/true, THREAD) Array<T>(length);
40  }
41
42  template <typename T>
43  static Array<T>* new_array(ClassLoaderData* loader_data, int length, T value, TRAPS) {
44    Array<T>* array = new_array<T>(loader_data, length, CHECK_NULL);
45    for (int i = 0; i < length; i++) {
46      array->at_put(i, value);
47    }
48    return array;
49  }
50
51  template <typename T>
52  static Array<T>* new_writeable_array(ClassLoaderData* loader_data, int length, TRAPS) {
53    return new (loader_data, length, /*read_only*/false, THREAD) Array<T>(length);
54  }
55
56  template <typename T>
57  static Array<T>* new_writeable_array(ClassLoaderData* loader_data, int length, T value, TRAPS) {
58    Array<T>* array = new_writeable_array<T>(loader_data, length, CHECK_NULL);
59    for (int i = 0; i < length; i++) {
60      array->at_put(i, value);
61    }
62    return array;
63  }
64
65  template <typename T>
66  static void free_array(ClassLoaderData* loader_data, Array<T>* data) {
67    if (data != NULL) {
68      assert(loader_data != NULL, "shouldn't pass null");
69      assert(!data->is_shared(), "cannot deallocate array in shared spaces");
70      int size = data->size();
71      if (DumpSharedSpaces) {
72        loader_data->ro_metaspace()->deallocate((MetaWord*)data, size, false);
73      } else {
74        loader_data->metaspace_non_null()->deallocate((MetaWord*)data, size, false);
75      }
76    }
77  }
78
79  // Deallocation method for metadata
80  template <class T>
81  static void free_metadata(ClassLoaderData* loader_data, T md) {
82    if (DumpSharedSpaces) {
83      // FIXME: the freeing code is buggy, especially when PrintSharedSpaces is enabled.
84      // Disable for now -- this means if you specify bad classes in your classlist you
85      // may have wasted space inside the archive.
86      return;
87    }
88    if (md != NULL) {
89      assert(loader_data != NULL, "shouldn't pass null");
90      int size = md->size();
91      // Call metadata's deallocate function which will call deallocate fields
92      assert(!DumpSharedSpaces, "cannot deallocate metadata when dumping CDS archive");
93      assert(!md->on_stack(), "can't deallocate things on stack");
94      assert(!md->is_shared(), "cannot deallocate if in shared spaces");
95      md->deallocate_contents(loader_data);
96      loader_data->metaspace_non_null()->deallocate((MetaWord*)md, size, md->is_klass());
97    }
98  }
99};
100
101#endif // SHARE_VM_MEMORY_METADATAFACTORY_HPP
102