1 /* 2 * Copyright (c) 2012, 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 /* 26 * @test 27 * @bug 8003720 28 * @summary Method in interpreter stack frame can be deallocated 29 * @compile -XDignore.symbol.file Victim.java 30 * @run main/othervm -Xverify:all -Xint Test8003720 31 */ 32 33 // Attempts to make the JVM unload a class while still executing one of its methods. 34 public class Test8003720 { 35 final static String VICTIM_CLASS_NAME = "Victim"; 36 final static boolean QUIET = true; 37 final static long DURATION = 30000; 38 39 public interface CallMe { void callme(); } 40 41 public static void main(String... av) throws Throwable { 42 newVictimClassLoader(); 43 System.gc(); 44 45 newVictimClass(); 46 System.gc(); 47 48 newVictimInstance(); 49 System.gc(); 50 51 ((CallMe)newVictimInstance()).callme(); 52 } 53 54 public static Object newVictimInstance() throws Throwable { 55 return newVictimClass().newInstance(); 56 } 57 58 public static Class<?> newVictimClass() throws Throwable { 59 return Class.forName(VICTIM_CLASS_NAME, true, new VictimClassLoader()); 60 } 61 62 public static ClassLoader newVictimClassLoader() throws Throwable { 63 return new VictimClassLoader(); 64 } 65 66 public static void println(String line) { 67 if (!QUIET) { 68 System.out.println(line); 69 } 70 } 71 }