1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/utilities/preserveException.cpp Wed Apr 27 01:25:04 2016 +0800
1.3 @@ -0,0 +1,90 @@
1.4 +/*
1.5 + * Copyright (c) 1998, 2012, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + *
1.26 + */
1.27 +
1.28 +#include "precompiled.hpp"
1.29 +#include "runtime/handles.inline.hpp"
1.30 +#include "utilities/preserveException.hpp"
1.31 +
1.32 +// TODO: These three classes should be refactored
1.33 +
1.34 +PreserveExceptionMark::PreserveExceptionMark(Thread*& thread) {
1.35 + thread = Thread::current();
1.36 + _thread = thread;
1.37 + _preserved_exception_oop = Handle(thread, _thread->pending_exception());
1.38 + _preserved_exception_line = _thread->exception_line();
1.39 + _preserved_exception_file = _thread->exception_file();
1.40 + _thread->clear_pending_exception(); // Needed to avoid infinite recursion
1.41 +}
1.42 +
1.43 +
1.44 +PreserveExceptionMark::~PreserveExceptionMark() {
1.45 + if (_thread->has_pending_exception()) {
1.46 + oop exception = _thread->pending_exception();
1.47 + _thread->clear_pending_exception(); // Needed to avoid infinite recursion
1.48 + exception->print();
1.49 + fatal("PreserveExceptionMark destructor expects no pending exceptions");
1.50 + }
1.51 + if (_preserved_exception_oop() != NULL) {
1.52 + _thread->set_pending_exception(_preserved_exception_oop(), _preserved_exception_file, _preserved_exception_line);
1.53 + }
1.54 +}
1.55 +
1.56 +
1.57 +// This code is cloned from PreserveExceptionMark, except that:
1.58 +// returned pending exceptions do not cause a crash.
1.59 +// thread is passed in, not set (not a reference parameter)
1.60 +// and bug 6431341 has been addressed.
1.61 +
1.62 +CautiouslyPreserveExceptionMark::CautiouslyPreserveExceptionMark(Thread* thread) {
1.63 + _thread = thread;
1.64 + _preserved_exception_oop = Handle(thread, _thread->pending_exception());
1.65 + _preserved_exception_line = _thread->exception_line();
1.66 + _preserved_exception_file = _thread->exception_file();
1.67 + _thread->clear_pending_exception(); // Pending exceptions are checked in the destructor
1.68 +}
1.69 +
1.70 +
1.71 +CautiouslyPreserveExceptionMark::~CautiouslyPreserveExceptionMark() {
1.72 + assert(!_thread->has_pending_exception(), "unexpected exception generated");
1.73 + if (_thread->has_pending_exception()) {
1.74 + _thread->clear_pending_exception();
1.75 + }
1.76 + if (_preserved_exception_oop() != NULL) {
1.77 + _thread->set_pending_exception(_preserved_exception_oop(), _preserved_exception_file, _preserved_exception_line);
1.78 + }
1.79 +}
1.80 +
1.81 +
1.82 +void WeakPreserveExceptionMark::preserve() {
1.83 + _preserved_exception_oop = Handle(_thread, _thread->pending_exception());
1.84 + _preserved_exception_line = _thread->exception_line();
1.85 + _preserved_exception_file = _thread->exception_file();
1.86 + _thread->clear_pending_exception();
1.87 +}
1.88 +
1.89 +void WeakPreserveExceptionMark::restore() {
1.90 + if (!_thread->has_pending_exception()) {
1.91 + _thread->set_pending_exception(_preserved_exception_oop(), _preserved_exception_file, _preserved_exception_line);
1.92 + }
1.93 +}
