1 /* 2 * Copyright (c) 1998, 2010, 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 #ifndef SHARE_VM_UTILITIES_PRESERVEEXCEPTION_HPP 26 #define SHARE_VM_UTILITIES_PRESERVEEXCEPTION_HPP 27 28 #include "runtime/handles.hpp" 29 #include "runtime/thread.inline.hpp" 30 31 // This file provides more support for exception handling; see also exceptions.hpp 32 class PreserveExceptionMark { 33 private: 34 Thread* _thread; 35 Handle _preserved_exception_oop; 36 int _preserved_exception_line; 37 const char* _preserved_exception_file; 38 39 public: 40 PreserveExceptionMark(Thread*& thread); 41 ~PreserveExceptionMark(); 42 }; 43 44 45 // This is a clone of PreserveExceptionMark which asserts instead 46 // of failing when what it wraps generates a pending exception. 47 // It also addresses bug 6431341. 48 class CautiouslyPreserveExceptionMark { 49 private: 50 Thread* _thread; 51 Handle _preserved_exception_oop; 52 int _preserved_exception_line; 53 const char* _preserved_exception_file; 54 55 public: 56 CautiouslyPreserveExceptionMark(Thread* thread); 57 ~CautiouslyPreserveExceptionMark(); 58 }; 59 60 61 // Like PreserveExceptionMark but allows new exceptions to be generated in 62 // the body of the mark. If a new exception is generated then the original one 63 // is discarded. 64 class WeakPreserveExceptionMark { 65 private: 66 Thread* _thread; 67 Handle _preserved_exception_oop; 68 int _preserved_exception_line; 69 const char* _preserved_exception_file; 70 71 void preserve(); 72 void restore(); 73 74 public: 75 WeakPreserveExceptionMark(Thread* pThread) : _thread(pThread), _preserved_exception_oop() { 76 if (pThread->has_pending_exception()) { 77 preserve(); 78 } 79 } 80 ~WeakPreserveExceptionMark() { 81 if (_preserved_exception_oop.not_null()) { 82 restore(); 83 } 84 } 85 }; 86 87 88 89 // use global exception mark when allowing pending exception to be set and 90 // saving and restoring them 91 #define PRESERVE_EXCEPTION_MARK Thread* THREAD; PreserveExceptionMark __em(THREAD); 92 93 #endif // SHARE_VM_UTILITIES_PRESERVEEXCEPTION_HPP