1 /*
2 * Copyright (c) 1999, 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 com.sun.tools.example.debug.bdi;
27
28 import com.sun.jdi.*;
29 import com.sun.jdi.event.*;
30
31 import java.util.*;
32
33 import com.sun.tools.example.debug.event.*;
34
35 import javax.swing.SwingUtilities;
36
37 /**
38 */
39 class JDIEventSource extends Thread {
40
41 private /*final*/ EventQueue queue;
42 private /*final*/ Session session;
43 private /*final*/ ExecutionManager runtime;
44 private final JDIListener firstListener = new FirstListener();
45
46 private boolean wantInterrupt; //### Hack
47
48 /**
49 * Create event source.
50 */
51 JDIEventSource(Session session) {
52 super("JDI Event Set Dispatcher");
53 this.session = session;
54 this.runtime = session.runtime;
55 this.queue = session.vm.eventQueue();
56 }
57
58 public void run() {
59 try {
60 runLoop();
61 } catch (Exception exc) {
62 //### Do something different for InterruptedException???
63 // just exit
64 }
65 session.running = false;
66 }
67
68 private void runLoop() throws InterruptedException {
69 AbstractEventSet es;
70 do {
71 EventSet jdiEventSet = queue.remove();
72 es = AbstractEventSet.toSpecificEventSet(jdiEventSet);
73 session.interrupted = es.suspendedAll();
74 dispatchEventSet(es);
75 } while(!(es instanceof VMDisconnectEventSet));
76 }
77
78 //### Gross foul hackery!
79 private void dispatchEventSet(final AbstractEventSet es) {
80 SwingUtilities.invokeLater(new Runnable() {
81 public void run() {
82 boolean interrupted = es.suspendedAll();
83 es.notify(firstListener);
84 boolean wantInterrupt = JDIEventSource.this.wantInterrupt;
85 for (JDIListener jl : session.runtime.jdiListeners) {
86 es.notify(jl);
87 }
88 if (interrupted && !wantInterrupt) {
89 session.interrupted = false;
90 //### Catch here is a hack
91 try {
92 session.vm.resume();
93 } catch (VMDisconnectedException ee) {}
94 }
95 if (es instanceof ThreadDeathEventSet) {
96 ThreadReference t = ((ThreadDeathEventSet)es).getThread();
97 session.runtime.removeThreadInfo(t);
98 }
99 }
100 });
101 }
102
103 private void finalizeEventSet(AbstractEventSet es) {
104 if (session.interrupted && !wantInterrupt) {
105 session.interrupted = false;
106 //### Catch here is a hack
107 try {
108 session.vm.resume();
109 } catch (VMDisconnectedException ee) {}
110 }
111 if (es instanceof ThreadDeathEventSet) {
112 ThreadReference t = ((ThreadDeathEventSet)es).getThread();
113 session.runtime.removeThreadInfo(t);
114 }
115 }
116
117 //### This is a Hack, deal with it
118 private class FirstListener implements JDIListener {
119
120 public void accessWatchpoint(AccessWatchpointEventSet e) {
121 session.runtime.validateThreadInfo();
122 wantInterrupt = true;
123 }
124
125 public void classPrepare(ClassPrepareEventSet e) {
126 wantInterrupt = false;
127 runtime.resolve(e.getReferenceType());
128 }
129
130 public void classUnload(ClassUnloadEventSet e) {
131 wantInterrupt = false;
132 }
133
134 public void exception(ExceptionEventSet e) {
135 wantInterrupt = true;
136 }
137
138 public void locationTrigger(LocationTriggerEventSet e) {
139 session.runtime.validateThreadInfo();
140 wantInterrupt = true;
141 }
142
143 public void modificationWatchpoint(ModificationWatchpointEventSet e) {
144 session.runtime.validateThreadInfo();
145 wantInterrupt = true;
146 }
147
148 public void threadDeath(ThreadDeathEventSet e) {
149 wantInterrupt = false;
150 }
151
152 public void threadStart(ThreadStartEventSet e) {
153 wantInterrupt = false;
154 }
155
156 public void vmDeath(VMDeathEventSet e) {
157 //### Should have some way to notify user
158 //### that VM died before the session ended.
159 wantInterrupt = false;
160 }
161
162 public void vmDisconnect(VMDisconnectEventSet e) {
163 //### Notify user?
164 wantInterrupt = false;
165 session.runtime.endSession();
166 }
167
168 public void vmStart(VMStartEventSet e) {
169 //### Do we need to do anything with it?
170 wantInterrupt = false;
171 }
172 }
173 }