Mercurial > hg > truffle
annotate src/share/vm/classfile/metadataOnStackMark.hpp @ 21231:0bb06deee33b
Check for null in LabelOp#setIncomingValues and JumpOp#setOutgoingValues.
author | Josef Eisl <josef.eisl@jku.at> |
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date | Tue, 05 May 2015 12:12:33 +0200 |
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1 /* |
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2 * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. |
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8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
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14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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18 * |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 * |
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23 */ |
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24 |
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25 #ifndef SHARE_VM_CLASSFILE_METADATAONSTACKMARK_HPP |
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26 #define SHARE_VM_CLASSFILE_METADATAONSTACKMARK_HPP |
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27 |
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28 #include "memory/allocation.hpp" |
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29 #include "utilities/chunkedList.hpp" |
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30 |
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31 class Metadata; |
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32 |
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33 typedef ChunkedList<Metadata*, mtInternal> MetadataOnStackBuffer; |
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34 |
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35 // Helper class to mark and unmark metadata used on the stack as either handles |
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36 // or executing methods, so that it can't be deleted during class redefinition |
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37 // and class unloading. |
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38 // This is also used for other things that can be deallocated, like class |
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39 // metadata during parsing, relocated methods, and methods in backtraces. |
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40 class MetadataOnStackMark : public StackObj { |
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41 NOT_PRODUCT(static bool _is_active;) |
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42 |
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43 static volatile MetadataOnStackBuffer* _used_buffers; |
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44 static volatile MetadataOnStackBuffer* _free_buffers; |
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45 |
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46 static MetadataOnStackBuffer* allocate_buffer(); |
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47 static void retire_buffer(MetadataOnStackBuffer* buffer); |
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48 |
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49 public: |
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50 MetadataOnStackMark(bool visit_code_cache); |
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51 ~MetadataOnStackMark(); |
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52 |
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53 static void record(Metadata* m, Thread* thread); |
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54 static void retire_buffer_for_thread(Thread* thread); |
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55 static bool has_buffer_for_thread(Thread* thread); |
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56 }; |
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57 |
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58 #endif // SHARE_VM_CLASSFILE_METADATAONSTACKMARK_HPP |