Mercurial > hg > truffle
diff src/share/vm/utilities/preserveException.hpp @ 0:a61af66fc99e jdk7-b24
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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.hpp Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,85 @@ +/* + * 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. + * + */ + +// This file provides more support for exception handling; see also exceptions.hpp +class PreserveExceptionMark { + private: + Thread* _thread; + Handle _preserved_exception_oop; + int _preserved_exception_line; + const char* _preserved_exception_file; + + public: + PreserveExceptionMark(Thread*& thread); + ~PreserveExceptionMark(); +}; + + +// This is a clone of PreserveExceptionMark which asserts instead +// of failing when what it wraps generates a pending exception. +// It also addresses bug 6431341. +class CautiouslyPreserveExceptionMark { + private: + Thread* _thread; + Handle _preserved_exception_oop; + int _preserved_exception_line; + const char* _preserved_exception_file; + + public: + CautiouslyPreserveExceptionMark(Thread* thread); + ~CautiouslyPreserveExceptionMark(); +}; + + +// Like PreserveExceptionMark but allows new exceptions to be generated in +// the body of the mark. If a new exception is generated then the original one +// is discarded. +class WeakPreserveExceptionMark { +private: + Thread* _thread; + Handle _preserved_exception_oop; + int _preserved_exception_line; + const char* _preserved_exception_file; + + void preserve(); + void restore(); + + public: + WeakPreserveExceptionMark(Thread* pThread) : _thread(pThread), _preserved_exception_oop() { + if (pThread->has_pending_exception()) { + preserve(); + } + } + ~WeakPreserveExceptionMark() { + if (_preserved_exception_oop.not_null()) { + restore(); + } + } +}; + + + +// use global exception mark when allowing pending exception to be set and +// saving and restoring them +#define PRESERVE_EXCEPTION_MARK Thread* THREAD; PreserveExceptionMark __em(THREAD);