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1   /*
2    * Copyright (c) 2000, 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  package sun.jvm.hotspot.ui;
26  
27  import java.io.*;
28  import java.awt.*;
29  import java.awt.event.*;
30  import javax.swing.*;
31  import javax.swing.text.*;
32  
33  import sun.jvm.hotspot.debugger.*;
34  import sun.jvm.hotspot.runtime.*;
35  import sun.jvm.hotspot.utilities.*;
36  
37  /** Uses {@link sun.jvm.hotspot.utilities.PointerFinder} to provide a
38      graphical user interface to the VM's debugging utility "find". */
39  
40  public class FindPanel extends JPanel {
41    // UI widgets we need permanent handles to
42    private JTextField addressField;
43    private JTextArea  textArea;
44    private JLabel statusLabel;
45  
46    public FindPanel() {
47      super();
48  
49      setLayout(new BorderLayout());
50      Box hbox = Box.createHorizontalBox();
51      hbox.add(new JLabel("Address: "));
52      addressField = new JTextField(20);
53      hbox.add(addressField);
54      statusLabel = new JLabel();
55      hbox.add(statusLabel);
56      add(hbox, BorderLayout.NORTH);
57  
58      JScrollPane scroller = new JScrollPane();
59      textArea = new JTextArea();
60      textArea.setEditable(false);
61      textArea.setLineWrap(true);
62      textArea.setWrapStyleWord(true);
63      scroller.getViewport().add(textArea);
64      add(scroller, BorderLayout.CENTER);
65  
66      addressField.addActionListener(new ActionListener() {
67          public void actionPerformed(ActionEvent e) {
68            try {
69              Address a = VM.getVM().getDebugger().parseAddress(addressField.getText());
70              PointerLocation loc = PointerFinder.find(a);
71              ByteArrayOutputStream bos = new ByteArrayOutputStream();
72              loc.printOn(new PrintStream(bos));
73              clear();
74              textArea.append(bos.toString());
75              statusLabel.setText("");
76            }
77            catch (NumberFormatException ex) {
78              statusLabel.setText("<parse error>");
79            }
80            catch (AddressException ex) {
81              statusLabel.setText("<bad address>");
82            }
83            catch (Exception ex) {
84              ex.printStackTrace();
85              statusLabel.setText("<error during find>");
86            }
87          }
88        });
89    }
90  
91    private void clear() {
92      Document doc = textArea.getDocument();
93      if (doc.getLength() > 0) {
94        try {
95          doc.remove(0, doc.getLength());
96        }
97        catch (BadLocationException e) {
98        }
99      }
100   }
101 }