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 main 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 }