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annotate src/share/vm/utilities/preserveException.hpp @ 14517:3812c088b945
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author | lana |
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date | Thu, 06 Mar 2014 10:37:26 -0800 |
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0 | 1 /* |
1972 | 2 * Copyright (c) 1998, 2010, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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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. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #ifndef SHARE_VM_UTILITIES_PRESERVEEXCEPTION_HPP |
26 #define SHARE_VM_UTILITIES_PRESERVEEXCEPTION_HPP | |
27 | |
28 #include "runtime/handles.hpp" | |
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29 #include "runtime/thread.inline.hpp" |
1972 | 30 |
0 | 31 // This file provides more support for exception handling; see also exceptions.hpp |
32 class PreserveExceptionMark { | |
33 private: | |
34 Thread* _thread; | |
35 Handle _preserved_exception_oop; | |
36 int _preserved_exception_line; | |
37 const char* _preserved_exception_file; | |
38 | |
39 public: | |
40 PreserveExceptionMark(Thread*& thread); | |
41 ~PreserveExceptionMark(); | |
42 }; | |
43 | |
44 | |
45 // This is a clone of PreserveExceptionMark which asserts instead | |
46 // of failing when what it wraps generates a pending exception. | |
47 // It also addresses bug 6431341. | |
48 class CautiouslyPreserveExceptionMark { | |
49 private: | |
50 Thread* _thread; | |
51 Handle _preserved_exception_oop; | |
52 int _preserved_exception_line; | |
53 const char* _preserved_exception_file; | |
54 | |
55 public: | |
56 CautiouslyPreserveExceptionMark(Thread* thread); | |
57 ~CautiouslyPreserveExceptionMark(); | |
58 }; | |
59 | |
60 | |
61 // Like PreserveExceptionMark but allows new exceptions to be generated in | |
62 // the body of the mark. If a new exception is generated then the original one | |
63 // is discarded. | |
64 class WeakPreserveExceptionMark { | |
65 private: | |
66 Thread* _thread; | |
67 Handle _preserved_exception_oop; | |
68 int _preserved_exception_line; | |
69 const char* _preserved_exception_file; | |
70 | |
71 void preserve(); | |
72 void restore(); | |
73 | |
74 public: | |
75 WeakPreserveExceptionMark(Thread* pThread) : _thread(pThread), _preserved_exception_oop() { | |
76 if (pThread->has_pending_exception()) { | |
77 preserve(); | |
78 } | |
79 } | |
80 ~WeakPreserveExceptionMark() { | |
81 if (_preserved_exception_oop.not_null()) { | |
82 restore(); | |
83 } | |
84 } | |
85 }; | |
86 | |
87 | |
88 | |
89 // use global exception mark when allowing pending exception to be set and | |
90 // saving and restoring them | |
91 #define PRESERVE_EXCEPTION_MARK Thread* THREAD; PreserveExceptionMark __em(THREAD); | |
1972 | 92 |
93 #endif // SHARE_VM_UTILITIES_PRESERVEEXCEPTION_HPP |