--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.max.base/src/com/sun/max/gui/ThrowableDialog.java	Sat Dec 17 19:59:18 2011 +0100
@@ -0,0 +1,168 @@
+/*
+ * Copyright (c) 2007, 2011, 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.
+ *
+ * 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 com.sun.max.gui;
+
+import java.awt.*;
+import java.awt.event.*;
+import java.io.*;
+
+import javax.swing.*;
+import javax.swing.border.*;
+
+/**
+ * A dialog for displaying the details of an exception. Initially the dialog only shows the exception's
+ * {@linkplain Throwable#getMessage() message}. It includes a button for expanding the dialog to also show the stack
+ * trace. When the stack trace is shown, pressing the same button hides the stack trace.
+ */
+public final class ThrowableDialog extends JDialog {
+
+    /**
+     * Creates a dialog to display the details of an exception and makes it visible.
+     *
+     * @param throwable the exception whose details are being displayed
+     * @param owner the {@code Frame} from which the dialog is displayed
+     * @param title  the {@code String} to display in the dialog's title bar
+     */
+    public static void show(Throwable throwable, Frame owner, String title) {
+        new ThrowableDialog(throwable, owner, title).setVisible(true);
+    }
+
+    /**
+     * Creates a dialog to display the details of an exception and makes it visible on the
+     * {@linkplain SwingUtilities#invokeLater(Runnable) AWT dispatching thread}.
+     *
+     * @param throwable the exception whose details are being displayed
+     * @param owner the {@code Frame} from which the dialog is displayed
+     * @param title the {@code String} to display in the dialog's title bar
+     */
+    public static void showLater(Throwable throwable, Frame owner, String title) {
+        final ThrowableDialog dialog = new ThrowableDialog(throwable, owner, title);
+        SwingUtilities.invokeLater(new Runnable() {
+            public void run() {
+                dialog.setVisible(true);
+            }
+        });
+    }
+
+    /**
+     * Creates a dialog to display the details of an exception. The dialog is not displayed by this method.
+     *
+     * @param throwable the exception whose details are being displayed
+     * @param owner the {@code Frame} from which the dialog is displayed
+     * @param title  the {@code String} to display in the dialog's title bar
+     */
+    private ThrowableDialog(Throwable throwable, Frame owner, String title) {
+        super(owner, title, false);
+        setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
+        setAlwaysOnTop(true);
+
+        final JToggleButton stackTraceButton = new JToggleButton("Show stack trace");
+        final JButton closeButton = new JButton("Close");
+        closeButton.addActionListener(new ActionListener() {
+            public void actionPerformed(ActionEvent e) {
+                setVisible(false);
+                dispose();
+            }
+        });
+
+        final JPanel buttonsPanel = new JPanel();
+        buttonsPanel.add(closeButton);
+        buttonsPanel.add(stackTraceButton);
+
+        final Container mainPane = getContentPane();
+        //mainPane.setLayout(new FlowLayout());
+        mainPane.setLayout(new BoxLayout(mainPane, BoxLayout.PAGE_AXIS));
+        final JLabel message = new JLabel(throwable.getMessage());
+        final JPanel messagePanel = new JPanel();
+        messagePanel.add(message);
+        mainPane.add(messagePanel);
+        mainPane.add(buttonsPanel);
+        pack();
+
+        final Dimension dialogWithoutStackTracePreferredSize = getPreferredSize();
+
+        final JTextArea stackTraceText = new JTextArea(20, 40);
+        throwable.printStackTrace(new PrintWriter(new Writer() {
+
+            @Override
+            public void close() throws IOException {
+            }
+
+            @Override
+            public void flush() throws IOException {
+            }
+
+            @Override
+            public void write(char[] cbuf, int off, int len) throws IOException {
+                stackTraceText.append(new String(cbuf, off, len));
+            }
+        }));
+
+        final JScrollPane stackTracePanel = new JScrollPane(stackTraceText, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED, JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
+        final Dimension stackTraceTextPreferredSize = stackTraceText.getPreferredSize();
+        stackTracePanel.setBorder(new TitledBorder("Stack trace"));
+        final Dimension stackTracePanelPreferredSize = new Dimension(
+                        stackTraceTextPreferredSize.width + stackTracePanel.getVerticalScrollBar().getPreferredSize().width * 2,
+                        stackTraceTextPreferredSize.height + stackTracePanel.getHorizontalScrollBar().getPreferredSize().height);
+        stackTracePanel.setPreferredSize(stackTracePanelPreferredSize);
+        stackTracePanel.setVisible(false);
+
+        stackTraceButton.addActionListener(new ActionListener() {
+            public void actionPerformed(ActionEvent e) {
+                if (stackTraceButton.isSelected()) {
+                    stackTraceButton.setText("Hide stack trace");
+                    stackTracePanel.setVisible(true);
+                    setSize(new Dimension(Math.max(dialogWithoutStackTracePreferredSize.width, stackTracePanelPreferredSize.width),
+                                    dialogWithoutStackTracePreferredSize.height + Math.min(1000, stackTracePanelPreferredSize.height)));
+                } else {
+                    stackTraceButton.setText("Show stack trace");
+                    stackTracePanel.setVisible(false);
+                    setSize(dialogWithoutStackTracePreferredSize);
+                }
+                validate();
+            }
+        });
+        mainPane.add(stackTracePanel);
+
+        setSize(dialogWithoutStackTracePreferredSize);
+        pack();
+        setLocationRelativeTo(owner);
+    }
+
+    // Test code
+
+    public static void main(String[] args) {
+        try {
+            recurse(0);
+        } catch (RuntimeException runtimeException) {
+            new ThrowableDialog(runtimeException, null, "Runtime Exception");
+        }
+    }
+
+    static void recurse(int more) {
+        if (more > 345) {
+            throw new RuntimeException("This is a test. Repeat. This is a test.");
+        }
+        recurse(more + 1);
+    }
+}