1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/utilities/preserveException.hpp Wed Apr 27 01:25:04 2016 +0800
1.3 @@ -0,0 +1,93 @@
1.4 +/*
1.5 + * Copyright (c) 1998, 2010, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + *
1.26 + */
1.27 +
1.28 +#ifndef SHARE_VM_UTILITIES_PRESERVEEXCEPTION_HPP
1.29 +#define SHARE_VM_UTILITIES_PRESERVEEXCEPTION_HPP
1.30 +
1.31 +#include "runtime/handles.hpp"
1.32 +#include "runtime/thread.inline.hpp"
1.33 +
1.34 +// This file provides more support for exception handling; see also exceptions.hpp
1.35 +class PreserveExceptionMark {
1.36 + private:
1.37 + Thread* _thread;
1.38 + Handle _preserved_exception_oop;
1.39 + int _preserved_exception_line;
1.40 + const char* _preserved_exception_file;
1.41 +
1.42 + public:
1.43 + PreserveExceptionMark(Thread*& thread);
1.44 + ~PreserveExceptionMark();
1.45 +};
1.46 +
1.47 +
1.48 +// This is a clone of PreserveExceptionMark which asserts instead
1.49 +// of failing when what it wraps generates a pending exception.
1.50 +// It also addresses bug 6431341.
1.51 +class CautiouslyPreserveExceptionMark {
1.52 + private:
1.53 + Thread* _thread;
1.54 + Handle _preserved_exception_oop;
1.55 + int _preserved_exception_line;
1.56 + const char* _preserved_exception_file;
1.57 +
1.58 + public:
1.59 + CautiouslyPreserveExceptionMark(Thread* thread);
1.60 + ~CautiouslyPreserveExceptionMark();
1.61 +};
1.62 +
1.63 +
1.64 +// Like PreserveExceptionMark but allows new exceptions to be generated in
1.65 +// the body of the mark. If a new exception is generated then the original one
1.66 +// is discarded.
1.67 +class WeakPreserveExceptionMark {
1.68 +private:
1.69 + Thread* _thread;
1.70 + Handle _preserved_exception_oop;
1.71 + int _preserved_exception_line;
1.72 + const char* _preserved_exception_file;
1.73 +
1.74 + void preserve();
1.75 + void restore();
1.76 +
1.77 + public:
1.78 + WeakPreserveExceptionMark(Thread* pThread) : _thread(pThread), _preserved_exception_oop() {
1.79 + if (pThread->has_pending_exception()) {
1.80 + preserve();
1.81 + }
1.82 + }
1.83 + ~WeakPreserveExceptionMark() {
1.84 + if (_preserved_exception_oop.not_null()) {
1.85 + restore();
1.86 + }
1.87 + }
1.88 +};
1.89 +
1.90 +
1.91 +
1.92 +// use global exception mark when allowing pending exception to be set and
1.93 +// saving and restoring them
1.94 +#define PRESERVE_EXCEPTION_MARK Thread* THREAD; PreserveExceptionMark __em(THREAD);
1.95 +
1.96 +#endif // SHARE_VM_UTILITIES_PRESERVEEXCEPTION_HPP
