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 67 // Test JNI_DefineClass() with long name. 68 try { 69 callDefineClass(tooBigClassName.toString()); 70 throw new RuntimeException("DefineClass did not throw expected NoClassDefFoundError"); 71 } catch (NoClassDefFoundError e) { 72 if (!e.getMessage().contains("Class name exceeds maximum length of ")) { 73 throw new RuntimeException("Wrong NoClassDefFoundError: " + e.getMessage()); 74 } 75 } 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 }