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comparison test/runtime/8003720/Test8003720.java @ 7179:d0aa87f04bd5

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8003720: NPG: Method in interpreter stack frame can be deallocated Summary: Pass down a closure during root scanning to keep the class of the method alive. Reviewed-by: coleenp, jcoomes
author stefank
date Tue, 27 Nov 2012 10:13:20 +0100
parents
children dad48145e775
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7178:19c1bd641922 7179:d0aa87f04bd5
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 }