Mercurial > hg > truffle
comparison test/runtime/ClassUnload/KeepAliveSoftReference.java @ 10230:33bcd9ead1d5
8009577: Test test/closed/runtime/classunload broken
Summary: Fixed tests to use new way of utilizing the WB API, fixed issue with where custom classloader got the classes from
Reviewed-by: collins, mgerdin, zgu
author | ctornqvi |
---|---|
date | Tue, 07 May 2013 21:36:59 +0200 |
parents | |
children |
comparison
equal
deleted
inserted
replaced
10229:f6a055fcf47d | 10230:33bcd9ead1d5 |
---|---|
1 /* | |
2 * Copyright (c) 2013, 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 KeepAliveSoftReference | |
26 * @summary This test case uses a java.lang.ref.SoftReference referencing a class instance to keep a class alive. | |
27 * @library /testlibrary /testlibrary/whitebox /runtime/testlibrary | |
28 * @library classes | |
29 * @build KeepAliveSoftReference test.Empty | |
30 * @build ClassUnloadCommon | |
31 * @run main ClassFileInstaller sun.hotspot.WhiteBox | |
32 * @run main/othervm -Xbootclasspath/a:. -Xmn8m -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI KeepAliveSoftReference | |
33 */ | |
34 | |
35 import java.lang.ref.SoftReference; | |
36 import sun.hotspot.WhiteBox; | |
37 | |
38 /** | |
39 * Test that verifies that classes are not unloaded when specific types of references are kept to them. | |
40 */ | |
41 public class KeepAliveSoftReference { | |
42 private static final String className = "test.Empty"; | |
43 private static final WhiteBox wb = WhiteBox.getWhiteBox(); | |
44 | |
45 public static void main(String... args) throws Exception { | |
46 ClassLoader cl = ClassUnloadCommon.newClassLoader(); | |
47 Class<?> c = cl.loadClass(className); | |
48 Object o = c.newInstance(); | |
49 SoftReference<Object> sr = new SoftReference(o); | |
50 o = null; c = null; cl = null; | |
51 | |
52 { | |
53 boolean isAlive = wb.isClassAlive(className); | |
54 System.out.println("testSoftReference (1) alive: " + isAlive); | |
55 boolean cleared = (sr.get() == null); | |
56 boolean shouldBeAlive = !cleared; | |
57 ClassUnloadCommon.failIf(isAlive != shouldBeAlive, "" + isAlive + " != " + shouldBeAlive); | |
58 } | |
59 | |
60 ClassUnloadCommon.triggerUnloading(); | |
61 | |
62 { | |
63 boolean isAlive = wb.isClassAlive(className); | |
64 System.out.println("testSoftReference (2) alive: " + isAlive); | |
65 boolean cleared = (sr.get() == null); | |
66 boolean shouldBeAlive = !cleared; | |
67 ClassUnloadCommon.failIf(isAlive != shouldBeAlive, "" + isAlive + " != " + shouldBeAlive); | |
68 } | |
69 sr.clear(); | |
70 ClassUnloadCommon.triggerUnloading(); | |
71 | |
72 { | |
73 boolean isAlive = wb.isClassAlive(className); | |
74 System.out.println("testSoftReference (3) alive: " + isAlive); | |
75 boolean cleared = (sr.get() == null); | |
76 boolean shouldBeAlive = !cleared; | |
77 ClassUnloadCommon.failIf(isAlive != shouldBeAlive, "" + isAlive + " != " + shouldBeAlive); | |
78 } | |
79 } | |
80 } |