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src/share/vm/classfile/metadataOnStackMark.hpp@ac27a9c85bea (annotated)
src/share/vm/classfile/metadataOnStackMark.hpp
Thu, 24 May 2018 18:41:44 +0800
- author
- aoqi
- date
- Thu, 24 May 2018 18:41:44 +0800
- changeset 8856
- ac27a9c85bea
- parent 7333
- b12a2a9b05ca
- child 9184
- fbcbfd2753b5
- permissions
- -rw-r--r--
Merge
| aoqi@0 | 1 | /* |
| aoqi@0 | 2 | * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved. |
| aoqi@0 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| aoqi@0 | 4 | * |
| aoqi@0 | 5 | * This code is free software; you can redistribute it and/or modify it |
| aoqi@0 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| aoqi@0 | 7 | * published by the Free Software Foundation. |
| aoqi@0 | 8 | * |
| aoqi@0 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| aoqi@0 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| aoqi@0 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| aoqi@0 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| aoqi@0 | 13 | * accompanied this code). |
| aoqi@0 | 14 | * |
| aoqi@0 | 15 | * You should have received a copy of the GNU General Public License version |
| aoqi@0 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| aoqi@0 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| aoqi@0 | 18 | * |
| aoqi@0 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| aoqi@0 | 20 | * or visit www.oracle.com if you need additional information or have any |
| aoqi@0 | 21 | * questions. |
| aoqi@0 | 22 | * |
| aoqi@0 | 23 | */ |
| aoqi@0 | 24 | |
| aoqi@0 | 25 | #ifndef SHARE_VM_CLASSFILE_METADATAONSTACKMARK_HPP |
| aoqi@0 | 26 | #define SHARE_VM_CLASSFILE_METADATAONSTACKMARK_HPP |
| aoqi@0 | 27 | |
| aoqi@0 | 28 | #include "memory/allocation.hpp" |
| stefank@7333 | 29 | #include "utilities/chunkedList.hpp" |
| aoqi@0 | 30 | |
| aoqi@0 | 31 | class Metadata; |
| aoqi@0 | 32 | |
| stefank@7333 | 33 | typedef ChunkedList<Metadata*, mtInternal> MetadataOnStackBuffer; |
| stefank@7333 | 34 | |
| aoqi@0 | 35 | // Helper class to mark and unmark metadata used on the stack as either handles |
| aoqi@0 | 36 | // or executing methods, so that it can't be deleted during class redefinition |
| aoqi@0 | 37 | // and class unloading. |
| aoqi@0 | 38 | // This is also used for other things that can be deallocated, like class |
| aoqi@0 | 39 | // metadata during parsing, relocated methods, and methods in backtraces. |
| aoqi@0 | 40 | class MetadataOnStackMark : public StackObj { |
| aoqi@0 | 41 | NOT_PRODUCT(static bool _is_active;) |
| stefank@7333 | 42 | |
| stefank@7333 | 43 | static volatile MetadataOnStackBuffer* _used_buffers; |
| stefank@7333 | 44 | static volatile MetadataOnStackBuffer* _free_buffers; |
| stefank@7333 | 45 | |
| stefank@7333 | 46 | static MetadataOnStackBuffer* allocate_buffer(); |
| stefank@7333 | 47 | static void retire_buffer(MetadataOnStackBuffer* buffer); |
| stefank@7333 | 48 | |
| aoqi@0 | 49 | public: |
| stefank@7333 | 50 | MetadataOnStackMark(bool visit_code_cache); |
| stefank@7333 | 51 | ~MetadataOnStackMark(); |
| stefank@7333 | 52 | |
| stefank@7333 | 53 | static void record(Metadata* m, Thread* thread); |
| stefank@7333 | 54 | static void retire_buffer_for_thread(Thread* thread); |
| stefank@7333 | 55 | static bool has_buffer_for_thread(Thread* thread); |
| aoqi@0 | 56 | }; |
| aoqi@0 | 57 | |
| aoqi@0 | 58 | #endif // SHARE_VM_CLASSFILE_METADATAONSTACKMARK_HPP |
