duke@435: /*
stefank@2314:  * Copyright (c) 1998, 2010, Oracle and/or its affiliates. All rights reserved.
duke@435:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435:  *
duke@435:  * This code is free software; you can redistribute it and/or modify it
duke@435:  * under the terms of the GNU General Public License version 2 only, as
duke@435:  * published by the Free Software Foundation.
duke@435:  *
duke@435:  * This code is distributed in the hope that it will be useful, but WITHOUT
duke@435:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
duke@435:  * version 2 for more details (a copy is included in the LICENSE file that
duke@435:  * accompanied this code).
duke@435:  *
duke@435:  * You should have received a copy of the GNU General Public License version
duke@435:  * 2 along with this work; if not, write to the Free Software Foundation,
duke@435:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435:  *
trims@1907:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907:  * or visit www.oracle.com if you need additional information or have any
trims@1907:  * questions.
duke@435:  *
duke@435:  */
duke@435: 
stefank@2314: #include "precompiled.hpp"
stefank@2314: #include "runtime/handles.inline.hpp"
stefank@2314: #include "utilities/preserveException.hpp"
duke@435: 
duke@435: // TODO: These three classes should be refactored
duke@435: 
duke@435: PreserveExceptionMark::PreserveExceptionMark(Thread*& thread) {
duke@435:   thread     = Thread::current();
duke@435:   _thread    = thread;
duke@435:   _preserved_exception_oop = Handle(thread, _thread->pending_exception());
duke@435:   _thread->clear_pending_exception(); // Needed to avoid infinite recursion
duke@435:   _preserved_exception_line = _thread->exception_line();
duke@435:   _preserved_exception_file = _thread->exception_file();
duke@435: }
duke@435: 
duke@435: 
duke@435: PreserveExceptionMark::~PreserveExceptionMark() {
duke@435:   if (_thread->has_pending_exception()) {
duke@435:     oop exception = _thread->pending_exception();
duke@435:     _thread->clear_pending_exception(); // Needed to avoid infinite recursion
duke@435:     exception->print();
duke@435:     fatal("PreserveExceptionMark destructor expects no pending exceptions");
duke@435:   }
duke@435:   if (_preserved_exception_oop() != NULL) {
duke@435:     _thread->set_pending_exception(_preserved_exception_oop(), _preserved_exception_file, _preserved_exception_line);
duke@435:   }
duke@435: }
duke@435: 
duke@435: 
duke@435: // This code is cloned from PreserveExceptionMark, except that:
duke@435: //   returned pending exceptions do not cause a crash.
duke@435: //   thread is passed in, not set (not a reference parameter)
duke@435: //   and bug 6431341 has been addressed.
duke@435: 
duke@435: CautiouslyPreserveExceptionMark::CautiouslyPreserveExceptionMark(Thread* thread) {
duke@435:   _thread    = thread;
duke@435:   _preserved_exception_oop = Handle(thread, _thread->pending_exception());
duke@435:   _preserved_exception_line = _thread->exception_line();
duke@435:   _preserved_exception_file = _thread->exception_file();
duke@435:   _thread->clear_pending_exception(); // Pending exceptions are checked in the destructor
duke@435: }
duke@435: 
duke@435: 
duke@435: CautiouslyPreserveExceptionMark::~CautiouslyPreserveExceptionMark() {
duke@435:   assert(!_thread->has_pending_exception(), "unexpected exception generated");
duke@435:   if (_thread->has_pending_exception()) {
duke@435:     _thread->clear_pending_exception();
duke@435:   }
duke@435:   if (_preserved_exception_oop() != NULL) {
duke@435:     _thread->set_pending_exception(_preserved_exception_oop(), _preserved_exception_file, _preserved_exception_line);
duke@435:   }
duke@435: }
duke@435: 
duke@435: 
duke@435: void WeakPreserveExceptionMark::preserve() {
duke@435:   _preserved_exception_oop = Handle(_thread, _thread->pending_exception());
duke@435:   _preserved_exception_line = _thread->exception_line();
duke@435:   _preserved_exception_file = _thread->exception_file();
duke@435:   _thread->clear_pending_exception();
duke@435: }
duke@435: 
duke@435: void WeakPreserveExceptionMark::restore() {
duke@435:   if (!_thread->has_pending_exception()) {
duke@435:     _thread->set_pending_exception(_preserved_exception_oop(), _preserved_exception_file, _preserved_exception_line);
duke@435:   }
duke@435: }