1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
|
/*
* Copyright (c) 1998, 2010, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
#include "precompiled.hpp"
#include "runtime/handles.inline.hpp"
#include "utilities/preserveException.hpp"
// TODO: These three classes should be refactored
PreserveExceptionMark::PreserveExceptionMark(Thread*& thread) {
thread = Thread::current();
_thread = thread;
_preserved_exception_oop = Handle(thread, _thread->pending_exception());
_thread->clear_pending_exception(); // Needed to avoid infinite recursion
_preserved_exception_line = _thread->exception_line();
_preserved_exception_file = _thread->exception_file();
}
PreserveExceptionMark::~PreserveExceptionMark() {
if (_thread->has_pending_exception()) {
oop exception = _thread->pending_exception();
_thread->clear_pending_exception(); // Needed to avoid infinite recursion
exception->print();
fatal("PreserveExceptionMark destructor expects no pending exceptions");
}
if (_preserved_exception_oop() != NULL) {
_thread->set_pending_exception(_preserved_exception_oop(), _preserved_exception_file, _preserved_exception_line);
}
}
// This code is cloned from PreserveExceptionMark, except that:
// returned pending exceptions do not cause a crash.
// thread is passed in, not set (not a reference parameter)
// and bug 6431341 has been addressed.
CautiouslyPreserveExceptionMark::CautiouslyPreserveExceptionMark(Thread* thread) {
_thread = thread;
_preserved_exception_oop = Handle(thread, _thread->pending_exception());
_preserved_exception_line = _thread->exception_line();
_preserved_exception_file = _thread->exception_file();
_thread->clear_pending_exception(); // Pending exceptions are checked in the destructor
}
CautiouslyPreserveExceptionMark::~CautiouslyPreserveExceptionMark() {
assert(!_thread->has_pending_exception(), "unexpected exception generated");
if (_thread->has_pending_exception()) {
_thread->clear_pending_exception();
}
if (_preserved_exception_oop() != NULL) {
_thread->set_pending_exception(_preserved_exception_oop(), _preserved_exception_file, _preserved_exception_line);
}
}
void WeakPreserveExceptionMark::preserve() {
_preserved_exception_oop = Handle(_thread, _thread->pending_exception());
_preserved_exception_line = _thread->exception_line();
_preserved_exception_file = _thread->exception_file();
_thread->clear_pending_exception();
}
void WeakPreserveExceptionMark::restore() {
if (!_thread->has_pending_exception()) {
_thread->set_pending_exception(_preserved_exception_oop(), _preserved_exception_file, _preserved_exception_line);
}
}
|
