1/* 2 * Copyright (c) 1998, 2012, 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#include "precompiled.hpp" 26#include "runtime/handles.inline.hpp" 27#include "utilities/preserveException.hpp" 28 29// TODO: These three classes should be refactored 30 31PreserveExceptionMark::PreserveExceptionMark(Thread*& thread) { 32 thread = Thread::current(); 33 _thread = thread; 34 _preserved_exception_oop = Handle(thread, _thread->pending_exception()); 35 _preserved_exception_line = _thread->exception_line(); 36 _preserved_exception_file = _thread->exception_file(); 37 _thread->clear_pending_exception(); // Needed to avoid infinite recursion 38} 39 40 41PreserveExceptionMark::~PreserveExceptionMark() { 42 if (_thread->has_pending_exception()) { 43 oop exception = _thread->pending_exception(); 44 _thread->clear_pending_exception(); // Needed to avoid infinite recursion 45 exception->print(); 46 fatal("PreserveExceptionMark destructor expects no pending exceptions"); 47 } 48 if (_preserved_exception_oop() != NULL) { 49 _thread->set_pending_exception(_preserved_exception_oop(), _preserved_exception_file, _preserved_exception_line); 50 } 51} 52 53 54// This code is cloned from PreserveExceptionMark, except that: 55// returned pending exceptions do not cause a crash. 56// thread is passed in, not set (not a reference parameter) 57// and bug 6431341 has been addressed. 58 59CautiouslyPreserveExceptionMark::CautiouslyPreserveExceptionMark(Thread* thread) { 60 _thread = thread; 61 _preserved_exception_oop = Handle(thread, _thread->pending_exception()); 62 _preserved_exception_line = _thread->exception_line(); 63 _preserved_exception_file = _thread->exception_file(); 64 _thread->clear_pending_exception(); // Pending exceptions are checked in the destructor 65} 66 67 68CautiouslyPreserveExceptionMark::~CautiouslyPreserveExceptionMark() { 69 assert(!_thread->has_pending_exception(), "unexpected exception generated"); 70 if (_thread->has_pending_exception()) { 71 _thread->clear_pending_exception(); 72 } 73 if (_preserved_exception_oop() != NULL) { 74 _thread->set_pending_exception(_preserved_exception_oop(), _preserved_exception_file, _preserved_exception_line); 75 } 76} 77 78 79void WeakPreserveExceptionMark::preserve() { 80 _preserved_exception_oop = Handle(_thread, _thread->pending_exception()); 81 _preserved_exception_line = _thread->exception_line(); 82 _preserved_exception_file = _thread->exception_file(); 83 _thread->clear_pending_exception(); 84} 85 86void WeakPreserveExceptionMark::restore() { 87 if (!_thread->has_pending_exception()) { 88 _thread->set_pending_exception(_preserved_exception_oop(), _preserved_exception_file, _preserved_exception_line); 89 } 90} 91