1 /*
2 * Copyright (c) 1998, 2012, 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 /* @test
25 * @bug 4171278
26 * @summary A remote object's unreferenced() method should be invoked with the
27 * context class loader set to the same context class loader that would be set
28 * when remote calls for that object are being executed: the object's class's
29 * class loader, or the context class loader set when the remote object was
30 * exported, if it is a child of the remote object's class loader.
31 * @author Peter Jones
32 *
33 * @bug 4214123
34 * @summary Unreferenced.unreferenced(...) threads should run in the nonSystem group.
35 * To complete the fix for, 4182104, RMI unreferenced threads should also
36 * run in the nonSystem so that they do not need permissions to modify the
37 * system thread group.
38 *
39 * @author Laird Dornin
40 *
41 * @library ../../../testlibrary
42 * @modules java.rmi/sun.rmi.registry
43 * java.rmi/sun.rmi.server
44 * java.rmi/sun.rmi.transport
45 * java.rmi/sun.rmi.transport.tcp
46 * @build TestLibrary UnreferencedContext_Stub
47 * @run main/othervm/timeout=120 UnreferencedContext
48 */
49
50 import java.net.*;
51 import java.rmi.*;
52 import java.rmi.registry.*;
53 import java.rmi.server.*;
54
55 public class UnreferencedContext implements Remote, Unreferenced, Runnable {
56
57 private final static String BINDING = "UnreferencedContext";
58 private final static long GC_INTERVAL = 6000;
59 private final static long TIMEOUT = 60000;
60
61 private Object lock = new Object();
62 private boolean unreferencedInvoked = false;
63 private ClassLoader unreferencedContext;
64
65 public void run() {
66 System.err.println("unreferenced method created thread succesfully");
67 }
68
69 public void unreferenced() {
70 // turn on security to ensure that the action below will not
71 // require extra permissions
72 System.setSecurityManager(new java.rmi.RMISecurityManager());
73
74 // exercise functionality prohibited by 4214123
75 (new Thread(this)).start();
76
77 System.err.println("unreferenced() method invoked");
78 synchronized (lock) {
79 unreferencedInvoked = true;
80 unreferencedContext =
81 Thread.currentThread().getContextClassLoader();
82 lock.notify();
83 }
84 }
85
86 public static void main(String[] args) {
87
88 System.err.println("\nRegression test for bug 4171278\n");
89
90 /*
91 * Set the interval that RMI will request for GC latency (before RMI
92 * gets initialized and this property is read) to an unrealistically
93 * small value, so that this test shouldn't have to wait too long.
94 */
95 System.setProperty("sun.rmi.dgc.client.gcInterval",
96 String.valueOf(GC_INTERVAL));
97
98 UnreferencedContext obj = new UnreferencedContext();
99
100 try {
101 /*
102 * This little trick is necessary to make sure that the RMI server
103 * threads for objects created on the default port get created
104 * before we set our special context class loader, so that they
105 * don't *accidentally* inherit it when making the unreferenced()
106 * callback.
107 */
108 UnicastRemoteObject.exportObject(obj);
109 UnicastRemoteObject.unexportObject(obj, true);
110
111 /*
112 * Now create special context class loader before exporting the
113 * remote object for real, so that it should be set when the
114 * object's unreferenced() method is called.
115 */
116 ClassLoader intendedContext = new URLClassLoader(new URL[0]);
117 Thread.currentThread().setContextClassLoader(intendedContext);
118 System.err.println(
119 "created and set intended context class loader: " +
120 intendedContext);
121
122 UnicastRemoteObject.exportObject(obj);
123 System.err.println("exported remote object");
124
125 Registry registry1 = TestLibrary.createRegistryOnUnusedPort();
126 int port = TestLibrary.getRegistryPort(registry1);
127 System.err.println("created registry");
128
129 Registry registry = LocateRegistry.getRegistry("", port);
130 registry.bind(BINDING, obj);
131 System.err.println("bound remote object in registry");
132
133 synchronized (obj.lock) {
134 registry.unbind(BINDING);
135 System.err.println("unbound remote object from registry; " +
136 "waiting for unreferenced() callback...");
137 /*
138 * This incantation seems sufficient to work around the
139 * ramifications of 4164696, so that this test will actually
140 * prove something useful about 1.2Beta4 or 1.2FCS before
141 * 4171278 was fixed.
142 */
143 for (int i = 0; i < 10; i++) {
144 System.gc();
145 obj.lock.wait(TIMEOUT / 10);
146 if (obj.unreferencedInvoked) {
147 break;
148 }
149 }
150
151 if (obj.unreferencedInvoked) {
152 System.err.println(
153 "invoked with context class loader: " +
154 obj.unreferencedContext);
155
156 if (obj.unreferencedContext == intendedContext) {
157 System.err.println(
158 "TEST PASSED: unreferenced() invoked" +
159 " with intended context class loader");
160 } else {
161 throw new RuntimeException(
162 "TEST FAILED: unreferenced() invoked" +
163 " with incorrect context class loader");
164 }
165 } else {
166 throw new RuntimeException(
167 "TEST FAILED: unreferenced() not invoked after " +
168 ((double) TIMEOUT / 1000.0) + " seconds or unreferenced failed to create a thread");
169 }
170 }
171
172 } catch (Exception e) {
173 if (e instanceof RuntimeException) {
174 throw (RuntimeException) e;
175 } else {
176 throw new RuntimeException(
177 "TEST FAILED: unexpected exception: " + e.toString());
178 }
179 } finally {
180 /*
181 * When all is said and done, try to unexport the remote object
182 * so that the VM has a chance to exit.
183 */
184 try {
185 UnicastRemoteObject.unexportObject(obj, true);
186 } catch (RemoteException e) {
187 }
188 }
189 }
190 }