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

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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children c18cbe5936b8
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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 #include "incls/_precompiled.incl"
26 #include "incls/_preserveException.cpp.incl"
27
28 // TODO: These three classes should be refactored
29
30 PreserveExceptionMark::PreserveExceptionMark(Thread*& thread) {
31 thread = Thread::current();
32 _thread = thread;
33 _preserved_exception_oop = Handle(thread, _thread->pending_exception());
34 _thread->clear_pending_exception(); // Needed to avoid infinite recursion
35 _preserved_exception_line = _thread->exception_line();
36 _preserved_exception_file = _thread->exception_file();
37 }
38
39
40 PreserveExceptionMark::~PreserveExceptionMark() {
41 if (_thread->has_pending_exception()) {
42 oop exception = _thread->pending_exception();
43 _thread->clear_pending_exception(); // Needed to avoid infinite recursion
44 exception->print();
45 fatal("PreserveExceptionMark destructor expects no pending exceptions");
46 }
47 if (_preserved_exception_oop() != NULL) {
48 _thread->set_pending_exception(_preserved_exception_oop(), _preserved_exception_file, _preserved_exception_line);
49 }
50 }
51
52
53 // This code is cloned from PreserveExceptionMark, except that:
54 // returned pending exceptions do not cause a crash.
55 // thread is passed in, not set (not a reference parameter)
56 // and bug 6431341 has been addressed.
57
58 CautiouslyPreserveExceptionMark::CautiouslyPreserveExceptionMark(Thread* thread) {
59 _thread = thread;
60 _preserved_exception_oop = Handle(thread, _thread->pending_exception());
61 _preserved_exception_line = _thread->exception_line();
62 _preserved_exception_file = _thread->exception_file();
63 _thread->clear_pending_exception(); // Pending exceptions are checked in the destructor
64 }
65
66
67 CautiouslyPreserveExceptionMark::~CautiouslyPreserveExceptionMark() {
68 assert(!_thread->has_pending_exception(), "unexpected exception generated");
69 if (_thread->has_pending_exception()) {
70 _thread->clear_pending_exception();
71 }
72 if (_preserved_exception_oop() != NULL) {
73 _thread->set_pending_exception(_preserved_exception_oop(), _preserved_exception_file, _preserved_exception_line);
74 }
75 }
76
77
78 void WeakPreserveExceptionMark::preserve() {
79 _preserved_exception_oop = Handle(_thread, _thread->pending_exception());
80 _preserved_exception_line = _thread->exception_line();
81 _preserved_exception_file = _thread->exception_file();
82 _thread->clear_pending_exception();
83 }
84
85 void WeakPreserveExceptionMark::restore() {
86 if (!_thread->has_pending_exception()) {
87 _thread->set_pending_exception(_preserved_exception_oop(), _preserved_exception_file, _preserved_exception_line);
88 }
89 }