1 /*
2 * Copyright (c) 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.
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 * @bug 8056900
27 * @summary Verifies message returned with NoClassDefFoundError exception.
28 * @library /test/lib
29 * @modules java.base/jdk.internal.misc
30 * java.compiler
31 * @run main/native NoClassDefFoundMsg
32 */
33
34 import jdk.test.lib.compiler.InMemoryJavaCompiler;
35 import jdk.internal.misc.Unsafe;
36
37 public class NoClassDefFoundMsg {
38
39 static native void callDefineClass(String className);
40 static native void callFindClass(String className);
41 static {
42 System.loadLibrary("NoClassDefFoundMsg");
43 }
44
45
46 public static void main(String args[]) throws Exception {
47 Unsafe unsafe = Unsafe.getUnsafe();
48
49 byte klassbuf[] = InMemoryJavaCompiler.compile("TestClass", "class TestClass { }");
50
51 // Create a class name of length 65536.
52 StringBuilder tooBigClassName = new StringBuilder("z");
53 for (int x = 0; x < 16; x++) {
54 tooBigClassName = tooBigClassName.append(tooBigClassName);
55 }
56
57 // Test JVM_DefineClass() with long name.
58 try {
59 unsafe.defineClass(tooBigClassName.toString(), klassbuf, 4, klassbuf.length - 4, null, null);
60 throw new RuntimeException("defineClass did not throw expected NoClassDefFoundError");
61 } catch (NoClassDefFoundError e) {
62 if (!e.getMessage().contains("Class name exceeds maximum length of ")) {
63 throw new RuntimeException("Wrong NoClassDefFoundError: " + e.getMessage());
64 }
65 }
66
76
77 // Test JNI_FindClass() with long name.
78 try {
79 callFindClass(tooBigClassName.toString());
80 throw new RuntimeException("DefineClass did not throw expected NoClassDefFoundError");
81 } catch (NoClassDefFoundError e) {
82 if (!e.getMessage().contains("Class name exceeds maximum length of ")) {
83 throw new RuntimeException("Wrong NoClassDefFoundError: " + e.getMessage());
84 }
85 }
86
87 // Test JNI_FindClass() with null name.
88 try {
89 callFindClass(null);
90 throw new RuntimeException("FindClass did not throw expected NoClassDefFoundError");
91 } catch (NoClassDefFoundError e) {
92 if (!e.getMessage().contains("No class name given")) {
93 throw new RuntimeException("Wrong NoClassDefFoundError: " + e.getMessage());
94 }
95 }
96 }
97 }
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1 /*
2 * Copyright (c) 2017, 2018, 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 * @bug 8056900
27 * @summary Verifies message returned with NoClassDefFoundError exception.
28 * @library /test/lib
29 * @modules java.base/jdk.internal.misc
30 * java.compiler
31 * @run main/native NoClassDefFoundErrorTest
32 */
33
34 import jdk.test.lib.Asserts;
35 import jdk.test.lib.compiler.InMemoryJavaCompiler;
36 import jdk.internal.misc.Unsafe;
37
38 public class NoClassDefFoundErrorTest {
39
40 static native void callDefineClass(String className);
41 static native void callFindClass(String className);
42 static {
43 System.loadLibrary("NoClassDefFoundMsg");
44 }
45
46 // Test illegal class names. Too long or null.
47 static void test_classNames() throws Exception {
48 Unsafe unsafe = Unsafe.getUnsafe();
49
50 byte klassbuf[] = InMemoryJavaCompiler.compile("TestClass", "class TestClass { }");
51
52 // Create a class name of length 65536.
53 StringBuilder tooBigClassName = new StringBuilder("z");
54 for (int x = 0; x < 16; x++) {
55 tooBigClassName = tooBigClassName.append(tooBigClassName);
56 }
57
58 // Test JVM_DefineClass() with long name.
59 try {
60 unsafe.defineClass(tooBigClassName.toString(), klassbuf, 4, klassbuf.length - 4, null, null);
61 throw new RuntimeException("defineClass did not throw expected NoClassDefFoundError");
62 } catch (NoClassDefFoundError e) {
63 if (!e.getMessage().contains("Class name exceeds maximum length of ")) {
64 throw new RuntimeException("Wrong NoClassDefFoundError: " + e.getMessage());
65 }
66 }
67
77
78 // Test JNI_FindClass() with long name.
79 try {
80 callFindClass(tooBigClassName.toString());
81 throw new RuntimeException("DefineClass did not throw expected NoClassDefFoundError");
82 } catch (NoClassDefFoundError e) {
83 if (!e.getMessage().contains("Class name exceeds maximum length of ")) {
84 throw new RuntimeException("Wrong NoClassDefFoundError: " + e.getMessage());
85 }
86 }
87
88 // Test JNI_FindClass() with null name.
89 try {
90 callFindClass(null);
91 throw new RuntimeException("FindClass did not throw expected NoClassDefFoundError");
92 } catch (NoClassDefFoundError e) {
93 if (!e.getMessage().contains("No class name given")) {
94 throw new RuntimeException("Wrong NoClassDefFoundError: " + e.getMessage());
95 }
96 }
97 }
98
99 private static class ClassWithFailedInitializer {
100 public static final int i = (new Object[1])[0].hashCode();
101 }
102
103 // If static initialization of a class failed, later access to it
104 // throws a NoClassDefFoundError. This error chains the exeption
105 // thrown in the previous initialization. This test assures this is
106 // working properly.
107 static void test_chainStaticInitializerException() throws Exception {
108 Object[] o = new Object[1024];
109 System.gc();
110
111 try {
112 if (ClassWithFailedInitializer.i == 0) {
113 throw new RuntimeException("Class initialization succeeded but is designed to fail.");
114 }
115 throw new Exception("Expected exception was not thrown.");
116 }
117 catch (ExceptionInInitializerError e) {
118 Asserts.assertNE(e.getCause(), null, "Expecting cause in ExceptionInInitializerError.");
119 Asserts.assertEQ(e.getCause().getClass(), NullPointerException.class, "sanity");
120 }
121
122 // Make sure the VM kept the stored exception alive.
123 o = null;
124 System.gc();
125 o = new Object[16384];
126 o = new Object[16384];
127 o = new Object[16384];
128 o = new Object[16384];
129 System.gc();
130
131 try {
132 if (ClassWithFailedInitializer.i == 0) {
133 throw new RuntimeException("Class initialization succeeded but is designed to fail.");
134 }
135 throw new Exception("Expected exception was not thrown.");
136 } catch (NoClassDefFoundError e) {
137 e.printStackTrace();
138 Asserts.assertNE(o, null, "sanity");
139 Asserts.assertNE(e.getCause(), null, "Expecting chained exception");
140 Asserts.assertEQ(e.getCause().getClass(), ExceptionInInitializerError.class,
141 "Wrong exception chained: " + e.getCause());
142 System.identityHashCode(e.getCause());
143 System.identityHashCode(e);
144 }
145 }
146
147 public static void main(String args[]) throws Exception {
148 test_classNames();
149 test_chainStaticInitializerException();
150 }
151 }
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