1/* 2 * Copyright (c) 2012, 2015, 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 8003720 27 * @summary Method in interpreter stack frame can be deallocated 28 * @modules java.base/jdk.internal.org.objectweb.asm 29 * java.base/jdk.internal.misc 30 * @compile -XDignore.symbol.file Victim.java 31 * @run main/othervm -Xverify:all -Xint Test8003720 32 */ 33 34// Attempts to make the JVM unload a class while still executing one of its methods. 35public class Test8003720 { 36 final static String VICTIM_CLASS_NAME = "Victim"; 37 final static boolean QUIET = true; 38 final static long DURATION = 30000; 39 40 public interface CallMe { void callme(); } 41 42 public static void main(String... av) throws Throwable { 43 newVictimClassLoader(); 44 System.gc(); 45 46 newVictimClass(); 47 System.gc(); 48 49 newVictimInstance(); 50 System.gc(); 51 52 ((CallMe)newVictimInstance()).callme(); 53 } 54 55 public static Object newVictimInstance() throws Throwable { 56 return newVictimClass().newInstance(); 57 } 58 59 public static Class<?> newVictimClass() throws Throwable { 60 return Class.forName(VICTIM_CLASS_NAME, true, new VictimClassLoader()); 61 } 62 63 public static ClassLoader newVictimClassLoader() throws Throwable { 64 return new VictimClassLoader(); 65 } 66 67 public static void println(String line) { 68 if (!QUIET) { 69 System.out.println(line); 70 } 71 } 72} 73