91 lines
3.5 KiB
C++
91 lines
3.5 KiB
C++
/*
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* Copyright (c) 1998, 2012, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#include "precompiled.hpp"
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#include "runtime/handles.inline.hpp"
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#include "utilities/preserveException.hpp"
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// TODO: These three classes should be refactored
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PreserveExceptionMark::PreserveExceptionMark(Thread*& thread) {
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thread = Thread::current();
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_thread = thread;
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_preserved_exception_oop = Handle(thread, _thread->pending_exception());
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_preserved_exception_line = _thread->exception_line();
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_preserved_exception_file = _thread->exception_file();
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_thread->clear_pending_exception(); // Needed to avoid infinite recursion
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}
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PreserveExceptionMark::~PreserveExceptionMark() {
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if (_thread->has_pending_exception()) {
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oop exception = _thread->pending_exception();
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_thread->clear_pending_exception(); // Needed to avoid infinite recursion
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exception->print();
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fatal("PreserveExceptionMark destructor expects no pending exceptions");
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}
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if (_preserved_exception_oop() != NULL) {
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_thread->set_pending_exception(_preserved_exception_oop(), _preserved_exception_file, _preserved_exception_line);
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}
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}
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// This code is cloned from PreserveExceptionMark, except that:
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// returned pending exceptions do not cause a crash.
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// thread is passed in, not set (not a reference parameter)
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// and bug 6431341 has been addressed.
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CautiouslyPreserveExceptionMark::CautiouslyPreserveExceptionMark(Thread* thread) {
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_thread = thread;
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_preserved_exception_oop = Handle(thread, _thread->pending_exception());
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_preserved_exception_line = _thread->exception_line();
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_preserved_exception_file = _thread->exception_file();
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_thread->clear_pending_exception(); // Pending exceptions are checked in the destructor
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}
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CautiouslyPreserveExceptionMark::~CautiouslyPreserveExceptionMark() {
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assert(!_thread->has_pending_exception(), "unexpected exception generated");
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if (_thread->has_pending_exception()) {
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_thread->clear_pending_exception();
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}
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if (_preserved_exception_oop() != NULL) {
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_thread->set_pending_exception(_preserved_exception_oop(), _preserved_exception_file, _preserved_exception_line);
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}
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}
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void WeakPreserveExceptionMark::preserve() {
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_preserved_exception_oop = Handle(_thread, _thread->pending_exception());
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_preserved_exception_line = _thread->exception_line();
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_preserved_exception_file = _thread->exception_file();
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_thread->clear_pending_exception();
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}
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void WeakPreserveExceptionMark::restore() {
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if (!_thread->has_pending_exception()) {
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_thread->set_pending_exception(_preserved_exception_oop(), _preserved_exception_file, _preserved_exception_line);
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}
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}
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