1 /* 2 * Copyright (c) 2005, 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. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package sun.io; 27 28 /** 29 * Used to set the Windows error mode at VM initialization time. 30 * <p> 31 * The error mode decides whether the system will handle specific types of serious errors 32 * or whether the process will handle them. 33 * 34 * @since 1.6 35 */ 36 public class Win32ErrorMode { 37 38 // The system does not display the critical-error-handler message box. Instead, 39 // the system sends the error to the calling process. 40 private static final long SEM_FAILCRITICALERRORS = 0x0001; 41 42 // The system does not display the general-protection-fault message box. This flag should 43 // only be set by debugging applications that handle general protection (GP) faults themselves 44 // with an exception handler. 45 private static final long SEM_NOGPFAULTERRORBOX = 0x0002; 46 47 // The system automatically fixes memory alignment faults and makes them invisible 48 // to the application. It does this for the calling process and any descendant processes. 49 private static final long SEM_NOALIGNMENTFAULTEXCEPT = 0x0004; 50 51 // The system does not display a message box when it fails to find a file. Instead, 52 // the error is returned to the calling process. 53 private static final long SEM_NOOPENFILEERRORBOX = 0x8000; 54 55 private Win32ErrorMode() { 56 } 57 58 /** 59 * Invoke at VM initialization time to disable the critical error message box. 60 * <p> 61 * The critial error message box is disabled unless the system property 62 * <tt>sun.io.allowCriticalErrorMessageBox</tt> is set to something other than 63 * <code>false</code>. This includes the empty string. 64 * <p> 65 * This method does nothing if invoked after VM and class library initialization 66 * has completed. 67 */ 68 public static void initialize() { 69 if (!sun.misc.VM.isBooted()) { 70 String s = (String) System.getProperty("sun.io.allowCriticalErrorMessageBox"); 71 if (s == null || s.equals(Boolean.FALSE.toString())) { 72 long mode = setErrorMode(0); 73 mode |= SEM_FAILCRITICALERRORS; 74 setErrorMode(mode); 75 } 76 } 77 } 78 79 // Win32 SetErrorMode 80 private static native long setErrorMode(long mode); 81 }