aoqi@0: /*
aoqi@0:  * Copyright (c) 1998, 2012, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  *
aoqi@0:  */
aoqi@0: 
aoqi@0: #include "precompiled.hpp"
aoqi@0: #include "runtime/handles.inline.hpp"
aoqi@0: #include "utilities/preserveException.hpp"
aoqi@0: 
aoqi@0: // TODO: These three classes should be refactored
aoqi@0: 
aoqi@0: PreserveExceptionMark::PreserveExceptionMark(Thread*& thread) {
aoqi@0:   thread     = Thread::current();
aoqi@0:   _thread    = thread;
aoqi@0:   _preserved_exception_oop = Handle(thread, _thread->pending_exception());
aoqi@0:   _preserved_exception_line = _thread->exception_line();
aoqi@0:   _preserved_exception_file = _thread->exception_file();
aoqi@0:   _thread->clear_pending_exception(); // Needed to avoid infinite recursion
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: PreserveExceptionMark::~PreserveExceptionMark() {
aoqi@0:   if (_thread->has_pending_exception()) {
aoqi@0:     oop exception = _thread->pending_exception();
aoqi@0:     _thread->clear_pending_exception(); // Needed to avoid infinite recursion
aoqi@0:     exception->print();
aoqi@0:     fatal("PreserveExceptionMark destructor expects no pending exceptions");
aoqi@0:   }
aoqi@0:   if (_preserved_exception_oop() != NULL) {
aoqi@0:     _thread->set_pending_exception(_preserved_exception_oop(), _preserved_exception_file, _preserved_exception_line);
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: // This code is cloned from PreserveExceptionMark, except that:
aoqi@0: //   returned pending exceptions do not cause a crash.
aoqi@0: //   thread is passed in, not set (not a reference parameter)
aoqi@0: //   and bug 6431341 has been addressed.
aoqi@0: 
aoqi@0: CautiouslyPreserveExceptionMark::CautiouslyPreserveExceptionMark(Thread* thread) {
aoqi@0:   _thread    = thread;
aoqi@0:   _preserved_exception_oop = Handle(thread, _thread->pending_exception());
aoqi@0:   _preserved_exception_line = _thread->exception_line();
aoqi@0:   _preserved_exception_file = _thread->exception_file();
aoqi@0:   _thread->clear_pending_exception(); // Pending exceptions are checked in the destructor
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: CautiouslyPreserveExceptionMark::~CautiouslyPreserveExceptionMark() {
aoqi@0:   assert(!_thread->has_pending_exception(), "unexpected exception generated");
aoqi@0:   if (_thread->has_pending_exception()) {
aoqi@0:     _thread->clear_pending_exception();
aoqi@0:   }
aoqi@0:   if (_preserved_exception_oop() != NULL) {
aoqi@0:     _thread->set_pending_exception(_preserved_exception_oop(), _preserved_exception_file, _preserved_exception_line);
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: void WeakPreserveExceptionMark::preserve() {
aoqi@0:   _preserved_exception_oop = Handle(_thread, _thread->pending_exception());
aoqi@0:   _preserved_exception_line = _thread->exception_line();
aoqi@0:   _preserved_exception_file = _thread->exception_file();
aoqi@0:   _thread->clear_pending_exception();
aoqi@0: }
aoqi@0: 
aoqi@0: void WeakPreserveExceptionMark::restore() {
aoqi@0:   if (!_thread->has_pending_exception()) {
aoqi@0:     _thread->set_pending_exception(_preserved_exception_oop(), _preserved_exception_file, _preserved_exception_line);
aoqi@0:   }
aoqi@0: }