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comparison src/share/vm/utilities/preserveException.hpp @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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-1:000000000000 0:a61af66fc99e
1 /*
2 * Copyright 1998-2006 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 // This file provides more support for exception handling; see also exceptions.hpp
26 class PreserveExceptionMark {
27 private:
28 Thread* _thread;
29 Handle _preserved_exception_oop;
30 int _preserved_exception_line;
31 const char* _preserved_exception_file;
32
33 public:
34 PreserveExceptionMark(Thread*& thread);
35 ~PreserveExceptionMark();
36 };
37
38
39 // This is a clone of PreserveExceptionMark which asserts instead
40 // of failing when what it wraps generates a pending exception.
41 // It also addresses bug 6431341.
42 class CautiouslyPreserveExceptionMark {
43 private:
44 Thread* _thread;
45 Handle _preserved_exception_oop;
46 int _preserved_exception_line;
47 const char* _preserved_exception_file;
48
49 public:
50 CautiouslyPreserveExceptionMark(Thread* thread);
51 ~CautiouslyPreserveExceptionMark();
52 };
53
54
55 // Like PreserveExceptionMark but allows new exceptions to be generated in
56 // the body of the mark. If a new exception is generated then the original one
57 // is discarded.
58 class WeakPreserveExceptionMark {
59 private:
60 Thread* _thread;
61 Handle _preserved_exception_oop;
62 int _preserved_exception_line;
63 const char* _preserved_exception_file;
64
65 void preserve();
66 void restore();
67
68 public:
69 WeakPreserveExceptionMark(Thread* pThread) : _thread(pThread), _preserved_exception_oop() {
70 if (pThread->has_pending_exception()) {
71 preserve();
72 }
73 }
74 ~WeakPreserveExceptionMark() {
75 if (_preserved_exception_oop.not_null()) {
76 restore();
77 }
78 }
79 };
80
81
82
83 // use global exception mark when allowing pending exception to be set and
84 // saving and restoring them
85 #define PRESERVE_EXCEPTION_MARK Thread* THREAD; PreserveExceptionMark __em(THREAD);