Mercurial > hg > truffle
diff src/share/vm/utilities/preserveException.cpp @ 0:a61af66fc99e jdk7-b24
Initial load
author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | c18cbe5936b8 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/vm/utilities/preserveException.cpp Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,89 @@ +/* + * Copyright 1998-2006 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.com if you need additional information or + * have any questions. + * + */ + +#include "incls/_precompiled.incl" +#include "incls/_preserveException.cpp.incl" + +// TODO: These three classes should be refactored + +PreserveExceptionMark::PreserveExceptionMark(Thread*& thread) { + thread = Thread::current(); + _thread = thread; + _preserved_exception_oop = Handle(thread, _thread->pending_exception()); + _thread->clear_pending_exception(); // Needed to avoid infinite recursion + _preserved_exception_line = _thread->exception_line(); + _preserved_exception_file = _thread->exception_file(); +} + + +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); + } +}