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