| /* |
| * Copyright (c) 1998, 2012, 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()); |
| _preserved_exception_line = _thread->exception_line(); |
| _preserved_exception_file = _thread->exception_file(); |
| _thread->clear_pending_exception(); // Needed to avoid infinite recursion |
| } |
| |
| |
| 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); |
| } |
| } |