117 lines
4.3 KiB
Java
117 lines
4.3 KiB
Java
/*
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* Copyright (c) 2021, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 8262913
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* @summary Verifies DefineClass with null or truncate bytes gets appropriate exception
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* @library /test/lib
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* @modules java.base/jdk.internal.misc
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* @compile A.java
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* @run main/native NullClassBytesTest
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*/
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import jdk.test.lib.classloader.ClassUnloadCommon;
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public class NullClassBytesTest {
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static native Class<?> nativeDefineClass(String name, ClassLoader ldr, byte[] class_bytes, int length);
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static {
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System.loadLibrary("NullClassBytesTest");
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}
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static class SimpleLoader extends ClassLoader {
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public Class<?> loadClass(String name) throws ClassNotFoundException {
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synchronized(getClassLoadingLock(name)) {
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Class<?> c = findLoadedClass(name);
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if (c != null) return c;
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// load the class data from the connection
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if (name.equals("A")) {
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byte[] b = ClassUnloadCommon.getClassData("A");
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return defineClass(name, b, 0, b.length);
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} else if (name.equals("B")) {
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byte[] b = new byte[0];
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return defineClass(name, b, 0, b.length);
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} else if (name.equals("C")) {
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byte[] b = null;
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return defineClass(name, b, 0, 0);
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} else if (name.equals("D")) {
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byte[] b = new byte[0];
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return nativeDefineClass(name, this, b, b.length);
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} else if (name.equals("E")) {
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byte[] b = null;
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return nativeDefineClass(name, this, b, 0);
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} else {
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return super.loadClass(name);
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}
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}
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}
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}
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public static void main(java.lang.String[] unused) throws Exception {
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SimpleLoader ldr = new SimpleLoader();
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Class<?> a = Class.forName("A", true, ldr);
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Object obj = a.getConstructor().newInstance();
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// If byte array points to null, the JVM throws ClassFormatError("Truncated class file")
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try {
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Class<?> b = Class.forName("B", true, ldr);
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} catch (ClassFormatError cfe) {
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if (!cfe.getMessage().contains("Truncated class file")) {
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cfe.printStackTrace();
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throw new RuntimeException("Wrong message");
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}
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}
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// If byte array is null, ClassLoader native detects this and throws NPE
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// before calling JVM_DefineClassWithSource
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try {
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Class<?> c = Class.forName("C", true, ldr);
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} catch (NullPointerException npe) {}
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// Test JNI_DefineClass with truncated bytes
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try {
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Class<?> c = Class.forName("D", true, ldr);
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} catch (ClassFormatError cfe) {
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if (!cfe.getMessage().contains("Truncated class file")) {
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cfe.printStackTrace();
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throw new RuntimeException("Wrong message");
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}
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}
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// Native methods must throw their own NPE
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try {
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Class<?> c = Class.forName("E", true, ldr);
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} catch (NullPointerException npe) {
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if (!npe.getMessage().equals("class_bytes are null")) {
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npe.printStackTrace();
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throw new RuntimeException("Wrong message");
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}
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}
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System.out.println("TEST PASSED");
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}
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}
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