--- /dev/null 2009-04-14 14:16:08.000000000 +0400 +++ new/src/solaris/classes/sun/awt/X11/XErrorHandlerUtil.java 2013-01-29 16:19:43.000000000 +0300 @@ -0,0 +1,164 @@ +/* + * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. Oracle designates this + * particular file as subject to the "Classpath" exception as provided + * by Oracle in the LICENSE file that accompanied this code. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ +package sun.awt.X11; + +import java.security.AccessController; +import sun.awt.SunToolkit; +import sun.security.action.GetBooleanAction; +import sun.util.logging.PlatformLogger; + +/** + * This class contains code of the global toolkit error handler, exposes static + * methods which allow to set and unset synthetic error handlers. + */ +public final class XErrorHandlerUtil { + private static final PlatformLogger log = PlatformLogger.getLogger("sun.awt.X11.XErrorHandlerUtil"); + + /** + * The connection to X11 window server. + */ + private static long display; + + /** + * Error handler at the moment of XErrorHandlerUtil initialization. + */ + private static long saved_error_handler; + + /** + * XErrorEvent being handled. + */ + static volatile XErrorEvent saved_error; + + /** + * Current error handler or null if no error handler is set. + */ + private static XErrorHandler current_error_handler; + + /** + * Value of sun.awt.noisyerrorhandler system property. + */ + private static boolean noisyAwtHandler = AccessController.doPrivileged( + new GetBooleanAction("sun.awt.noisyerrorhandler")); + + /** + * The flag indicating that init was called already. + */ + private static boolean initPassed; + + /** + * Guarantees that no instance of this class can be created. + */ + private XErrorHandlerUtil() {} + + /** + * Sets the toolkit global error handler, stores the connection to X11 server, + * which will be used during an error handling process. + * @param display the connection to X11 server which should be stored + */ + private static void init(long display) { + SunToolkit.awtLock(); + try { + if (!initPassed) { + XErrorHandlerUtil.display = display; + saved_error_handler = XlibWrapper.SetToolkitErrorHandler(); + initPassed = true; + } + } finally { + SunToolkit.awtUnlock(); + } + } + + /** + * Sets a synthetic error handler. Must be called with the acquired AWT lock. + * @param handler the synthetic error handler to set + */ + public static void WITH_XERROR_HANDLER(XErrorHandler handler) { + saved_error = null; + current_error_handler = handler; + } + + /** + * Unsets a current synthetic error handler. Must be called with the acquired AWT lock. + */ + public static void RESTORE_XERROR_HANDLER() { + // Wait until all requests are processed by the X server + // and only then uninstall the error handler. + XSync(); + current_error_handler = null; + } + + /** + * Should be called under LOCK. + */ + public static int SAVED_XERROR_HANDLER(long display, XErrorEvent error) { + if (saved_error_handler != 0) { + // Default XErrorHandler may just terminate the process. Don't call it. + // return XlibWrapper.CallErrorHandler(saved_error_handler, display, error.pData); + } + if (log.isLoggable(PlatformLogger.FINE)) { + log.fine("Unhandled XErrorEvent: " + + "id=" + error.get_resourceid() + ", " + + "serial=" + error.get_serial() + ", " + + "ec=" + error.get_error_code() + ", " + + "rc=" + error.get_request_code() + ", " + + "mc=" + error.get_minor_code()); + } + return 0; + } + + /** + * Called from the native code when an error occurs. + */ + private static int globalErrorHandler(long display, long event_ptr) { + if (noisyAwtHandler) { + XlibWrapper.PrintXErrorEvent(display, event_ptr); + } + XErrorEvent event = new XErrorEvent(event_ptr); + saved_error = event; + try { + if (current_error_handler != null) { + return current_error_handler.handleError(display, event); + } else { + return SAVED_XERROR_HANDLER(display, event); + } + } catch (Throwable z) { + log.fine("Error in GlobalErrorHandler", z); + } + return 0; + } + + private static void XSync() { + SunToolkit.awtLock(); + try { + XlibWrapper.XSync(getDisplay(), 0); + } finally { + SunToolkit.awtUnlock(); + } + } + + private static long getDisplay() { + return display; + } +}