1 /*
2 * Copyright (c) 2020, 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 * @test
26 * @library /test/lib
27 * @modules java.compiler
28 * @build jdk.test.lib.compiler.CompilerUtils
29 * jdk.test.lib.Utils *
30 * @run shell ../MakeJAR3.sh HiddenClassAgent 'Can-Retransform-Classes: true'
31 * @run main/othervm/native -javaagent:HiddenClassAgent.jar HiddenClassApp
32 */
33
34 import java.lang.instrument.*;
35
36 /* Test that Instrumentation getAllLoadedClasses includes
37 * hidden classes but getInitiatedClasses does not.
38 * Check that all hidden classes are non-retransformable.
39 */
40 public class HiddenClassAgent extends Thread {
41 private static volatile boolean completed = false;
42 private static volatile boolean failed = false;
43 private static volatile boolean hiddenClassLoaded = false;
44
45 private static Instrumentation instr = null;
46 private static Object monitor = new Object();
47
48 static void log(String str) { System.err.println(str); }
49 public static boolean failed() { return failed; }
50
51 public static
52 boolean checkWaitForCompleteness() {
53 try {
54 synchronized (monitor) {
55 while (!completed) {
56 monitor.wait(100);
57 }
58 }
59 } catch (InterruptedException ex) {
60 ex.printStackTrace();
61 log("HiddenClassAgent: waitCheckForCompletness: Caught InterruptedException: " + ex);
62 }
63 return completed;
64 }
65
66 public static
67 void setHiddenClassLoaded() {
68 synchronized (monitor) {
69 hiddenClassLoaded = true;
70 monitor.notifyAll();
71 }
72 }
73
74 private static
75 void waitForHiddenClassLoad() {
76 try {
77 synchronized (monitor) {
78 while (!hiddenClassLoaded) {
79 monitor.wait(100);
80 }
81 }
82 } catch (InterruptedException ex) {
83 ex.printStackTrace();
84 log("HiddenClassAgent: waitForHiddenClassLoad: Caught InterruptedException: " + ex);
85 }
86 }
87
88 private static
89 ClassLoader testGetAllLoadedClasses() {
90 boolean hiddenClassFound = false;
91 ClassLoader loader = null;
92 Class<?>[] classes = instr.getAllLoadedClasses();
93
94 for (int i = 0; i < classes.length; i++) {
95 Class klass = classes[i];
96
97 if (!klass.isHiddenClass() || !klass.getName().contains("HiddenClass/")) {
98 continue;
99 }
100 log("HiddenClassAgent: getAllLoadedClasses returned hidden class: " + klass);
101 hiddenClassFound = true;
102 loader = klass.getClassLoader();
103 log("HiddenClassAgent: class loader of hidden class: " + loader);
104
105 try {
106 instr.retransformClasses(klass);
107 log("HiddenClassAgent: FAIL: hidden class is retransformable: " + klass);
108 failed = true;
109 } catch (UnmodifiableClassException e) {
110 log("HiddenClassAgent: Got expected UnmodifiableClassException for class: " + klass);
111 } catch (Throwable e) {
112 log("HiddenClassAgent: FAIL: unexpected throwable in hidden class retransform: " + klass);
113 log("HiddenClassAgent: got Throwable" + e);
114 failed = true;
115 }
116 }
117 if (!hiddenClassFound) {
118 log("HiddenClassAgent: FAIL: a hidden class is not found in getAllLoadedClasses list");
119 failed = true;
120 }
121 return loader;
122 }
123
124 private static
125 void testGetInitiatedClasses(ClassLoader loader) {
126 Class<?>[] classes = instr.getInitiatedClasses(loader);
127 for (int i = 0; i < classes.length; i++) {
128 Class klass = classes[i];
129
130 if (klass.isHiddenClass()) {
131 log("HiddenClassAgent: FAIL: getInitiatedClasses returned hidden class: " + klass);
132 failed = true;
133 return;
134 }
135 }
136 log("HiddenClassAgent: getInitiatedClasses returned no hidden classes as expected");
137 }
138
139 public static void
140 premain(String agentArgs, Instrumentation instrumentation) {
141 instr = instrumentation;
142 Thread agentThread = new HiddenClassAgent();
143 agentThread.start();
144 }
145
146 public void run () {
147 log("HiddenClassAgent: started");
148 waitForHiddenClassLoad();
149
150 // Test getAllLoadedClasses
151 ClassLoader loader = testGetAllLoadedClasses();
152
153 // Test getInitiatedClasses
154 testGetInitiatedClasses(null);
155 if (loader != null) {
156 testGetInitiatedClasses(loader);
157 }
158
159 synchronized (monitor) {
160 completed = true;
161 monitor.notifyAll();
162 }
163 log("HiddenClassAgent: finished");
164 }
165 }