author | mgerdin |
Mon, 11 Aug 2014 17:12:41 +0400 | |
changeset 25958 | 8dc85547d6d6 |
parent 17311 | 6ba3841cb7f9 |
child 28190 | 5a6b07edeb21 |
permissions | -rw-r--r-- |
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/* |
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8dc85547d6d6
8011397: JTREG needs to copy additional WhiteBox class file to JTwork/scratch/sun/hotspot
mgerdin
parents:
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diff
changeset
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* Copyright (c) 2013, 2014, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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/* |
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* @test UnloadTest |
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* @library /runtime/testlibrary /testlibrary /testlibrary/whitebox |
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* @library classes |
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* @build ClassUnloadCommon test.Empty |
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* @build UnloadTest |
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* @run main ClassFileInstaller sun.hotspot.WhiteBox |
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25958
8dc85547d6d6
8011397: JTREG needs to copy additional WhiteBox class file to JTwork/scratch/sun/hotspot
mgerdin
parents:
17311
diff
changeset
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* sun.hotspot.WhiteBox$WhiteBoxPermission |
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* @run main/othervm -Xbootclasspath/a:. -Xmn8m -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI UnloadTest |
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*/ |
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import sun.hotspot.WhiteBox; |
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/** |
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* Test that verifies that classes are unloaded when they are no longer reachable. |
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* |
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* The test creates a class loader, uses the loader to load a class and creates an instance |
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* of that class. The it nulls out all the references to the instance, class and class loader |
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* and tries to trigger class unloading. Then it verifies that the class is no longer |
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* loaded by the VM. |
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*/ |
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public class UnloadTest { |
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private static String className = "test.Empty"; |
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public static void main(String... args) throws Exception { |
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run(); |
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} |
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private static void run() throws Exception { |
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final WhiteBox wb = WhiteBox.getWhiteBox(); |
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ClassUnloadCommon.failIf(wb.isClassAlive(className), "is not expected to be alive yet"); |
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ClassLoader cl = ClassUnloadCommon.newClassLoader(); |
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Class<?> c = cl.loadClass(className); |
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Object o = c.newInstance(); |
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ClassUnloadCommon.failIf(!wb.isClassAlive(className), "should be live here"); |
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cl = null; c = null; o = null; |
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ClassUnloadCommon.triggerUnloading(); |
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ClassUnloadCommon.failIf(wb.isClassAlive(className), "should have been unloaded"); |
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} |
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} |
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