Mercurial > hg > graal-jvmci-8
diff test/runtime/ClassUnload/KeepAliveObject.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 |
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date | Tue, 07 May 2013 21:36:59 +0200 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/test/runtime/ClassUnload/KeepAliveObject.java Tue May 07 21:36:59 2013 +0200 @@ -0,0 +1,78 @@ +/* + * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ + +/* + * @test KeepAliveObject + * @summary This test case uses a class instance to keep the class alive. + * @library /testlibrary /testlibrary/whitebox /runtime/testlibrary + * @library classes + * @build KeepAliveObject test.Empty + * @build ClassUnloadCommon + * @run main ClassFileInstaller sun.hotspot.WhiteBox + * @run main/othervm -Xbootclasspath/a:. -Xmn8m -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI KeepAliveObject + */ + +import sun.hotspot.WhiteBox; + +/** + * Test that verifies that classes are not unloaded when specific types of references are kept to them. + */ +public class KeepAliveObject { + private static final String className = "test.Empty"; + private static final WhiteBox wb = WhiteBox.getWhiteBox(); + public static Object escape = null; + + public static void main(String... args) throws Exception { + ClassLoader cl = ClassUnloadCommon.newClassLoader(); + Class<?> c = cl.loadClass(className); + Object o = c.newInstance(); + cl = null; c = null; + escape = o; + + { + boolean isAlive = wb.isClassAlive(className); + System.out.println("testObject (1) alive: " + isAlive); + + ClassUnloadCommon.failIf(!isAlive, "should be alive"); + } + + ClassUnloadCommon.triggerUnloading(); + + { + boolean isAlive = wb.isClassAlive(className); + System.out.println("testObject (2) alive: " + isAlive); + + ClassUnloadCommon.failIf(!isAlive, "should be alive"); + } + o = null; + escape = null; + ClassUnloadCommon.triggerUnloading(); + + { + boolean isAlive = wb.isClassAlive(className); + System.out.println("testObject (3) alive: " + isAlive); + ClassUnloadCommon.failIf(isAlive, "should be unloaded"); + } + + } +}