1 /*
2 * Copyright (c) 2016, 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 * @modules java.base/jdk.internal.misc
27 * @library /test/lib ..
28 * @compile p2/c2.java
29 * @compile p4/c4.java
30 * @build sun.hotspot.WhiteBox
31 * @compile/module=java.base java/lang/ModuleHelper.java
32 * @run driver ClassFileInstaller sun.hotspot.WhiteBox
33 * sun.hotspot.WhiteBox$WhiteBoxPermission
34 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI CCE_module_msg
35 */
36
37 import java.io.*;
38 import java.net.URL;
39 import java.net.URLClassLoader;
40 import java.nio.file.Path;
41 import java.nio.file.Paths;
42 import static jdk.test.lib.Asserts.*;
43
44 // Test that the message in a runtime ClassCastException contains module info.
45 public class CCE_module_msg {
46 private static final Path CLASSES_DIR = Paths.get("classes");
47
48 public static void main(String[] args) throws Throwable {
49 // Should not display version
50 invalidObjectToDerived();
51 // Should display version
52 invalidClassToString();
53 // Should display customer class loader
54 invalidClassToStringCustomLoader();
55 }
56
57 public static void invalidObjectToDerived() {
58 java.lang.Object instance = new java.lang.Object();
59 int left = 23;
60 int right = 42;
61 try {
62 for (int i = 0; i < 1; i += 1) {
63 left = ((Derived) instance).method(left, right);
64 }
65 throw new RuntimeException("ClassCastException wasn't thrown, test failed.");
66 } catch (ClassCastException cce) {
67 System.out.println(cce.getMessage());
68 if (!cce.getMessage().contains("java.base/java.lang.Object cannot be cast to Derived")) {
69 throw new RuntimeException("Wrong message: " + cce.getMessage());
70 }
71 }
72 }
73
74 public static void invalidClassToString() throws Throwable {
75 // Get the java.lang.Module object for module java.base.
76 Class jlObject = Class.forName("java.lang.Object");
77 Object jlObject_jlM = jlObject.getModule();
78 assertNotNull(jlObject_jlM, "jlModule object of java.lang.Object should not be null");
79
80 // Get the class loader for CCE_module_msg and assume it's also used to
81 // load classes p1.c1 and p2.c2.
82 ClassLoader this_cldr = CCE_module_msg.class.getClassLoader();
83
84 // Define a module for p2.
85 Object m2x = ModuleHelper.ModuleObject("module_two", this_cldr, new String[] { "p2" });
86 assertNotNull(m2x, "Module should not be null");
87 ModuleHelper.DefineModule(m2x, false, "9.0", "m2x/there", new String[] { "p2" });
88 ModuleHelper.AddReadsModule(m2x, jlObject_jlM);
89
90 try {
91 ModuleHelper.AddModuleExportsToAll(m2x, "p2");
92 Object p2Obj = new p2.c2();
93 System.out.println((String)p2Obj);
94 throw new RuntimeException("ClassCastException wasn't thrown, test failed.");
95 } catch (ClassCastException cce) {
96 String exception = cce.getMessage();
97 System.out.println(exception);
98 if (exception.contains("module_two/p2.c2") ||
99 !(exception.contains("module_two@") &&
100 exception.contains("/p2.c2 cannot be cast to java.base/java.lang.String"))) {
101 throw new RuntimeException("Wrong message: " + exception);
102 }
103 }
104 }
105
106 public static void invalidClassToStringCustomLoader() throws Throwable {
107 // Get the java.lang.Module object for module java.base.
108 Class jlObject = Class.forName("java.lang.Object");
109 Object jlObject_jlM = jlObject.getModule();
110 assertNotNull(jlObject_jlM, "jlModule object of java.lang.Object should not be null");
111
112 // Create a customer class loader to load class p4/c4.
113 URL[] urls = new URL[] { CLASSES_DIR.toUri().toURL() };
114 ClassLoader parent = ClassLoader.getSystemClassLoader();
115 MyURLClassLoader myCldr = new MyURLClassLoader("MyClassLoader", urls, parent);
116
117 try {
118 // Class p4.c4 should be defined to the unnamed module of myCldr
119 Class p4_c4_class = myCldr.loadClass("p4.c4");
120 Object c4Obj = p4_c4_class.newInstance();
121 System.out.println((String)c4Obj);
122 throw new RuntimeException("ClassCastException wasn't thrown, test failed.");
123 } catch (ClassCastException cce) {
124 String exception = cce.getMessage();
125 System.out.println(exception);
126 if (!exception.contains("MyClassLoader//p4.c4 cannot be cast to java.base/java.lang.String")) {
127 throw new RuntimeException("Wrong message: " + exception);
128 }
129 }
130 }
131 }
132
133 class Derived extends java.lang.Object {
134 public int method(int left, int right) {
135 return right;
136 }
137 }
138
139 class MyURLClassLoader extends URLClassLoader {
140 public MyURLClassLoader(String name,
141 URL[] urls,
142 ClassLoader parent) {
143 super(name, urls, parent);
144 }
145
146 public Class loadClass(String name) throws ClassNotFoundException {
147 if (!name.equals("p4.c4")) {
148 return super.loadClass(name);
149 }
150 byte[] data = getClassData(name);
151 return defineClass(name, data, 0, data.length);
152 }
153
154 byte[] getClassData(String name) {
155 try {
156 String TempName = name.replaceAll("\\.", "/");
157 String currentDir = System.getProperty("test.classes");
158 String filename = currentDir + File.separator + TempName + ".class";
159 FileInputStream fis = new FileInputStream(filename);
160 byte[] b = new byte[5000];
161 int cnt = fis.read(b, 0, 5000);
162 byte[] c = new byte[cnt];
163 for (int i=0; i<cnt; i++) c[i] = b[i];
164 return c;
165 } catch (IOException e) {
166 return null;
167 }
168 }
169 }