1 /* 2 * Copyright (c) 1998, 2006, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 // This file provides more support for exception handling; see also exceptions.hpp 26 class PreserveExceptionMark { 27 private: 28 Thread* _thread; 29 Handle _preserved_exception_oop; 30 int _preserved_exception_line; 31 const char* _preserved_exception_file; 32 33 public: 34 PreserveExceptionMark(Thread*& thread); 35 ~PreserveExceptionMark(); 36 }; 37 38 39 // This is a clone of PreserveExceptionMark which asserts instead 40 // of failing when what it wraps generates a pending exception. 41 // It also addresses bug 6431341. 42 class CautiouslyPreserveExceptionMark { 43 private: 44 Thread* _thread; 45 Handle _preserved_exception_oop; 46 int _preserved_exception_line; 47 const char* _preserved_exception_file; 48 49 public: 50 CautiouslyPreserveExceptionMark(Thread* thread); 51 ~CautiouslyPreserveExceptionMark(); 52 }; 53 54 55 // Like PreserveExceptionMark but allows new exceptions to be generated in 56 // the body of the mark. If a new exception is generated then the original one 57 // is discarded. 58 class WeakPreserveExceptionMark { 59 private: 60 Thread* _thread; 61 Handle _preserved_exception_oop; 62 int _preserved_exception_line; 63 const char* _preserved_exception_file; 64 65 void preserve(); 66 void restore(); 67 68 public: 69 WeakPreserveExceptionMark(Thread* pThread) : _thread(pThread), _preserved_exception_oop() { 70 if (pThread->has_pending_exception()) { 71 preserve(); 72 } 73 } 74 ~WeakPreserveExceptionMark() { 75 if (_preserved_exception_oop.not_null()) { 76 restore(); 77 } 78 } 79 }; 80 81 82 83 // use global exception mark when allowing pending exception to be set and 84 // saving and restoring them 85 #define PRESERVE_EXCEPTION_MARK Thread* THREAD; PreserveExceptionMark __em(THREAD);