1 /*
2 * Copyright (c) 1998, 2017, 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.jdi;
27
28 import java.io.IOException;
29 import java.util.ArrayList;
30 import java.util.Collections;
31 import java.util.Iterator;
32 import java.util.List;
33 import java.util.ResourceBundle;
34 import java.util.ServiceLoader;
35
36 import com.sun.jdi.JDIPermission;
37 import com.sun.jdi.VMDisconnectedException;
38 import com.sun.jdi.VirtualMachine;
39 import com.sun.jdi.VirtualMachineManager;
40 import com.sun.jdi.connect.AttachingConnector;
41 import com.sun.jdi.connect.Connector;
42 import com.sun.jdi.connect.LaunchingConnector;
43 import com.sun.jdi.connect.ListeningConnector;
44 import com.sun.jdi.connect.spi.Connection;
45 import com.sun.jdi.connect.spi.TransportService;
46
47 /* Public for use by com.sun.jdi.Bootstrap */
48 public class VirtualMachineManagerImpl implements VirtualMachineManagerService {
49 private List<Connector> connectors = new ArrayList<>();
50 private LaunchingConnector defaultConnector = null;
51 private List<VirtualMachine> targets = new ArrayList<>();
52 private final ThreadGroup mainGroupForJDI;
53 private ResourceBundle messages = null;
54 private int vmSequenceNumber = 0;
55 private static final int majorVersion = 9;
56 private static final int minorVersion = 0;
57
58 private static final Object lock = new Object();
59 private static VirtualMachineManagerImpl vmm;
60
61 public static VirtualMachineManager virtualMachineManager() {
62 SecurityManager sm = System.getSecurityManager();
63 if (sm != null) {
64 JDIPermission vmmPermission =
65 new JDIPermission("virtualMachineManager");
66 sm.checkPermission(vmmPermission);
67 }
68 synchronized (lock) {
69 if (vmm == null) {
70 vmm = new VirtualMachineManagerImpl();
71 }
72 }
73 return vmm;
74 }
75
76 protected VirtualMachineManagerImpl() {
77
78 /*
79 * Create a top-level thread group
80 */
81 ThreadGroup top = Thread.currentThread().getThreadGroup();
82 ThreadGroup parent = null;
83 while ((parent = top.getParent()) != null) {
84 top = parent;
85 }
86 mainGroupForJDI = new ThreadGroup(top, "JDI main");
87
88 /*
89 * Load the connectors
90 */
91 ServiceLoader<Connector> connectorLoader =
92 ServiceLoader.load(Connector.class, Connector.class.getClassLoader());
93
94 Iterator<Connector> connectors = connectorLoader.iterator();
95
96 while (connectors.hasNext()) {
97 Connector connector;
98
99 try {
100 connector = connectors.next();
101 } catch (ThreadDeath x) {
102 throw x;
103 } catch (Exception x) {
104 System.err.println(x);
105 continue;
106 } catch (Error x) {
107 System.err.println(x);
108 continue;
109 }
110
111 addConnector(connector);
112 }
113
114 /*
115 * Load any transport services and encapsulate them with
116 * an attaching and listening connector.
117 */
118 ServiceLoader<TransportService> transportLoader =
119 ServiceLoader.load(TransportService.class,
120 TransportService.class.getClassLoader());
121
122 Iterator<TransportService> transportServices =
123 transportLoader.iterator();
124
125 while (transportServices.hasNext()) {
126 TransportService transportService;
127
128 try {
129 transportService = transportServices.next();
130 } catch (ThreadDeath x) {
131 throw x;
132 } catch (Exception x) {
133 System.err.println(x);
134 continue;
135 } catch (Error x) {
136 System.err.println(x);
137 continue;
138 }
139
140 addConnector(GenericAttachingConnector.create(transportService));
141 addConnector(GenericListeningConnector.create(transportService));
142 }
143
144 // no connectors found
145 if (allConnectors().size() == 0) {
146 throw new Error("no Connectors loaded");
147 }
148
149 // Set the default launcher. In order to be compatible
150 // 1.2/1.3/1.4 we try to make the default launcher
151 // "com.sun.jdi.CommandLineLaunch". If this connector
152 // isn't found then we arbitarly pick the first connector.
153 //
154 boolean found = false;
155 List<LaunchingConnector> launchers = launchingConnectors();
156 for (LaunchingConnector lc: launchers) {
157 if (lc.name().equals("com.sun.jdi.CommandLineLaunch")) {
158 setDefaultConnector(lc);
159 found = true;
160 break;
161 }
162 }
163 if (!found && launchers.size() > 0) {
164 setDefaultConnector(launchers.get(0));
165 }
166 }
167
168 public LaunchingConnector defaultConnector() {
169 if (defaultConnector == null) {
170 throw new Error("no default LaunchingConnector");
171 }
172 return defaultConnector;
173 }
174
175 public void setDefaultConnector(LaunchingConnector connector) {
176 defaultConnector = connector;
177 }
178
179 public List<LaunchingConnector> launchingConnectors() {
180 List<LaunchingConnector> launchingConnectors = new ArrayList<>(connectors.size());
181 for (Connector connector: connectors) {
182 if (connector instanceof LaunchingConnector) {
183 launchingConnectors.add((LaunchingConnector)connector);
184 }
185 }
186 return Collections.unmodifiableList(launchingConnectors);
187 }
188
189 public List<AttachingConnector> attachingConnectors() {
190 List<AttachingConnector> attachingConnectors = new ArrayList<>(connectors.size());
191 for (Connector connector: connectors) {
192 if (connector instanceof AttachingConnector) {
193 attachingConnectors.add((AttachingConnector)connector);
194 }
195 }
196 return Collections.unmodifiableList(attachingConnectors);
197 }
198
199 public List<ListeningConnector> listeningConnectors() {
200 List<ListeningConnector> listeningConnectors = new ArrayList<>(connectors.size());
201 for (Connector connector: connectors) {
202 if (connector instanceof ListeningConnector) {
203 listeningConnectors.add((ListeningConnector)connector);
204 }
205 }
206 return Collections.unmodifiableList(listeningConnectors);
207 }
208
209 public List<Connector> allConnectors() {
210 return Collections.unmodifiableList(connectors);
211 }
212
213 public List<VirtualMachine> connectedVirtualMachines() {
214 return Collections.unmodifiableList(targets);
215 }
216
217 public void addConnector(Connector connector) {
218 connectors.add(connector);
219 }
220
221 public void removeConnector(Connector connector) {
222 connectors.remove(connector);
223 }
224
225 public synchronized VirtualMachine createVirtualMachine(
226 Connection connection,
227 Process process) throws IOException {
228
229 if (!connection.isOpen()) {
230 throw new IllegalStateException("connection is not open");
231 }
232
233 VirtualMachine vm;
234 try {
235 vm = new VirtualMachineImpl(this, connection, process,
236 ++vmSequenceNumber);
237 } catch (VMDisconnectedException e) {
238 throw new IOException(e.getMessage());
239 }
240 targets.add(vm);
241 return vm;
242 }
243
244 public VirtualMachine createVirtualMachine(Connection connection) throws IOException {
245 return createVirtualMachine(connection, null);
246 }
247
248 public void addVirtualMachine(VirtualMachine vm) {
249 targets.add(vm);
250 }
251
252 void disposeVirtualMachine(VirtualMachine vm) {
253 targets.remove(vm);
254 }
255
256 public int majorInterfaceVersion() {
257 return majorVersion;
258 }
259
260 public int minorInterfaceVersion() {
261 return minorVersion;
262 }
263
264 ThreadGroup mainGroupForJDI() {
265 return mainGroupForJDI;
266 }
267
268 String getString(String key) {
269 if (messages == null) {
270 messages = ResourceBundle.getBundle("com.sun.tools.jdi.resources.jdi");
271 }
272 return messages.getString(key);
273 }
274 }