1 /*
2 * Copyright (c) 1998, 2021, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "memory/resourceArea.hpp"
27 #include "oops/oop.hpp"
28 #include "runtime/handles.inline.hpp"
29 #include "utilities/preserveException.hpp"
30
PreserveExceptionMark(Thread * thread)31 PreserveExceptionMark::PreserveExceptionMark(Thread* thread) {
32 _thread = thread;
33 _preserved_exception_oop = Handle(thread, _thread->pending_exception());
34 _preserved_exception_line = _thread->exception_line();
35 _preserved_exception_file = _thread->exception_file();
36 _thread->clear_pending_exception(); // Pending exceptions are checked in the destructor
37 }
38
39
~PreserveExceptionMark()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 ResourceMark rm(_thread);
45 assert(false, "PreserveExceptionMark destructor expects no pending exceptions %s",
46 exception->print_string());
47 }
48
49 if (_preserved_exception_oop() != NULL) {
50 _thread->set_pending_exception(_preserved_exception_oop(), _preserved_exception_file, _preserved_exception_line);
51 }
52 }
53
preserve()54 void WeakPreserveExceptionMark::preserve() {
55 _preserved_exception_oop = Handle(_thread, _thread->pending_exception());
56 _preserved_exception_line = _thread->exception_line();
57 _preserved_exception_file = _thread->exception_file();
58 _thread->clear_pending_exception();
59 }
60
restore()61 void WeakPreserveExceptionMark::restore() {
62 if (!_thread->has_pending_exception()) {
63 _thread->set_pending_exception(_preserved_exception_oop(), _preserved_exception_file, _preserved_exception_line);
64 }
65 }
66