1 /*
2 * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2018 SAP SE. All rights reserved.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
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23 */
24
25 /**
26 * @test
27 * @summary Test exception messages of LinkageError.
28 * @compile LE2_D_ambgs.jasm
29 * @run shell myMove.sh LE2_D_ambgs.class LE2_D_ambgs.impl2
30 * @compile LinkageErrorTest.java LE1.java LE2_B.java
31 * @run shell myMove.sh LE2_B.class LE2_B.impl2
32 * @run main/othervm -Xbootclasspath/a:. LinkageErrorTest
33 */
34
35 import java.io.ByteArrayOutputStream;
36 import java.io.InputStream;
37
38 import java.io.*;
39 import java.nio.file.Files;
40 import java.nio.file.Path;
41 import java.nio.file.Paths;
42
43 public class LinkageErrorTest {
44
45 static private class LE1_Loader extends ClassLoader {
46 public LE1_Loader() {
47 super();
48 }
49
50 public LE1_Loader(String name) {
51 super(name, ClassLoader.getSystemClassLoader());
52 }
53
54 public Class<?> myDefineClass(String name, byte[] b, int off, int len) throws ClassFormatError {
55 return defineClass(name, b, off, len, null);
56 }
57 }
58
59 private static byte[] le1_getBytecodes(String myName) throws Exception {
60 InputStream is = LinkageErrorTest.class.getResourceAsStream(myName + ".class");
61 if (is == null) {
62 System.out.println("is is null. File " + myName + ".class not found.");
63 }
64 ByteArrayOutputStream baos = new ByteArrayOutputStream();
65 byte[] buf = new byte[4096];
66 int len;
67 while ((len = is.read(buf)) != -1) { baos.write(buf, 0, len); }
68 buf = baos.toByteArray();
69 System.out.println("sizeof(" + myName + ".class) == " + buf.length);
70 return buf;
71 }
72
73 private static String expectedErrorMessageDuplicate1 =
74 "loader LinkageErrorTest$LE1_Loader (parent: \"app\" jdk.internal.loader.ClassLoaders$AppClassLoader) " +
75 "attempted duplicate class definition for test.LE1.";
76
77 // Load the same class twice.
78 // This test is derived from runtime/Metaspace/DefineClass.java.
79 public static void test1_duplicate1() throws Exception {
80 String myName = "test.LE1";
81 byte[] buf = le1_getBytecodes(myName.replace('.', '/'));
82 LE1_Loader cl = new LE1_Loader();
83
84 try {
85 @SuppressWarnings("unchecked")
86 Class<LinkageErrorTest> dc = (Class<LinkageErrorTest>) cl.myDefineClass(myName, buf, 0, buf.length);
87 System.out.println(dc);
88 // Should throw exception in SystemDictionary::check_constraints(), check for duplicates.
89 dc = (Class<LinkageErrorTest>) cl.myDefineClass(myName, buf, 0, buf.length);
90 throw new RuntimeException("Expected LinkageError was not thrown.");
91 } catch (NoClassDefFoundError exc) {
92 throw new RuntimeException("Unexpected NoClassDefFoundError: " + exc);
93 } catch (LinkageError jle) {
94 // Second definition should fail. Check error message.
95 String errorMsg = jle.getMessage();
96 if (!errorMsg.equals(expectedErrorMessageDuplicate1)) {
97 System.out.println("Expected: " + expectedErrorMessageDuplicate1 + "\n" +
98 "but got: " + errorMsg);
99 throw new RuntimeException("Wrong error message of LinkageError.");
100 } else {
101 System.out.println("Passed with message: " + errorMsg);
102 }
103 }
104 }
105
106 private static String expectedErrorMessageDuplicate2 =
107 "loader \"LoaderForTestLE1_2\" (instance of LinkageErrorTest$LE1_Loader, " +
108 "parent: \"app\" jdk.internal.loader.ClassLoaders$AppClassLoader) " +
109 "attempted duplicate class definition for test.LE1.";
110
111 // Load the same class twice. Use classloader with explicit name.
112 // This test is derived from runtime/Metaspace/DefineClass.java.
113 public static void test1_duplicate2() throws Exception {
114 String myName = "test.LE1";
115 byte[] buf = le1_getBytecodes(myName.replace('.', '/'));
116 LE1_Loader cl = new LE1_Loader("LoaderForTestLE1_2");
117
118 try {
119 @SuppressWarnings("unchecked")
120 Class<LinkageErrorTest> dc = (Class<LinkageErrorTest>) cl.myDefineClass(myName, buf, 0, buf.length);
121 System.out.println(dc);
122 // Should throw exception in SystemDictionary::check_constraints(), check for duplicates.
123 dc = (Class<LinkageErrorTest>) cl.myDefineClass(myName, buf, 0, buf.length);
124 throw new RuntimeException("Expected LinkageError was not thrown.");
125 } catch (NoClassDefFoundError exc) {
126 throw new RuntimeException("Unexpected NoClassDefFoundError: " + exc);
127 } catch (LinkageError jle) {
128 // Second definition should fail. Check error message.
129 String errorMsg = jle.getMessage();
130 if (!errorMsg.equals(expectedErrorMessageDuplicate2)) {
131 System.out.println("Expected: " + expectedErrorMessageDuplicate2 + "\n" +
132 "but got: " + errorMsg);
133 throw new RuntimeException("Wrong error message of LinkageError.");
134 } else {
135 System.out.println("Passed with message: " + errorMsg);
136 }
137 }
138 }
139
140 // Force LinkageError.
141 //
142 // Derived from test runtime/6626217.
143 //
144 // Uses the specialized class loader LE2_Loader.
145 // LE2_Loader first looks for a file with ending ".impl2" to load. If
146 // it does not find it, it delegates to the super class loader.
147 //
148 // A // interface
149 // |
150 // B // Compiled to B.impl2 so that it is found by our special class loader.
151 // // B uses D, so that loading B triggers loading D.
152 //
153 // C // An abstract class.
154 // |
155 // D // Class with two different implementations D1 and D2. D2 is
156 // // compiled to D.impl2 so that it is found by our special class loader.
157 //
158 // First, the bootstrap loader will load D1. It already has loaded interface A.
159 // Then, the second class loader LE2_Loader will load B. Recursive, it tries to
160 // load interface A. As it does not find it (there is no A.impl2), it asks the
161 // bootstrap classloader for A.
162 // Then it loads the D2 variant of D from D.impl2 and it's superclass C. This
163 // fails as D1 is already loaded with the same superclass.
164
165 static String expectedErrorMessage2 =
166 "loader constraint violation: loader LE2_Loader " +
167 "(parent: \"app\" jdk.internal.loader.ClassLoaders$AppClassLoader) wants to load " +
168 "class LE2_D_ambgs. A different class with the same name was previously loaded " +
169 "by \"app\" (instance of jdk.internal.loader.ClassLoaders$AppClassLoader, " +
170 "parent: \"platform\" jdk.internal.loader.ClassLoaders$PlatformClassLoader).";
171
172 public static void test2_access() throws Exception {
173 try {
174 // Make a Class 'LE2_D_ambgs' under the default loader.
175 // This uses the implementation from the .java file.
176 LE2_C c_1 = new LE2_D_ambgs();
177
178 // Some classes under a new Loader, loader2, including, indirectly,
179 // another version of 'LE2_D_ambgs'
180 ClassLoader loader2 = new LE2_Loader();
181 Class class2 = loader2.loadClass("LE2_B");
182 LE2_A iface = (LE2_A)class2.newInstance();
183
184 // Call D1.make() loaded by bootstrap loader with B loaded by Loader2.
185 LE2_D_ambgs[] x2 = c_1.make(iface);
186
187 throw new RuntimeException("Expected LinkageError was not thrown.");
188 } catch (LinkageError jle) {
189 String errorMsg = jle.getMessage();
190 if (!errorMsg.equals(expectedErrorMessage2)) {
191 System.out.println("Expected: " + expectedErrorMessage2 + "\n" +
192 "but got: " + errorMsg);
193 throw new RuntimeException("Wrong error message of LinkageError.");
194 } else {
195 System.out.println("Passed with message: " + errorMsg);
196 }
197 }
198 }
199
200 public static void main(String[] args) throws Exception {
201 test1_duplicate1();
202 test1_duplicate2();
203 test2_access();
204 }
205 }
206
207