Mercurial > hg > truffle
comparison src/share/vm/classfile/metadataOnStackMark.hpp @ 7949:5daaddd917a1
8006040: NPG: on_stack processing wastes space in ConstantPool
Summary: Added on_stack bit to flags. Also MetadataMarkOnStack is used for more than JVMTI so had to be moved.
Reviewed-by: dholmes, stefank
author | coleenp |
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date | Wed, 23 Jan 2013 10:34:29 -0500 |
parents | |
children | b12a2a9b05ca |
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7632:2ef7061f13b4 | 7949:5daaddd917a1 |
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1 /* | |
2 * Copyright (c) 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_CLASSFILE_METADATAONSTACKMARK_HPP | |
26 #define SHARE_VM_CLASSFILE_METADATAONSTACKMARK_HPP | |
27 | |
28 #include "memory/allocation.hpp" | |
29 | |
30 class Metadata; | |
31 | |
32 // Helper class to mark and unmark metadata used on the stack as either handles | |
33 // or executing methods, so that it can't be deleted during class redefinition | |
34 // and class unloading. | |
35 // This is also used for other things that can be deallocated, like class | |
36 // metadata during parsing, relocated methods, and methods in backtraces. | |
37 class MetadataOnStackMark : public StackObj { | |
38 NOT_PRODUCT(static bool _is_active;) | |
39 public: | |
40 MetadataOnStackMark(); | |
41 ~MetadataOnStackMark(); | |
42 static void record(Metadata* m); | |
43 }; | |
44 | |
45 #endif // SHARE_VM_CLASSFILE_METADATAONSTACKMARK_HPP |