Thu, 16 May 2013 12:14:19 -0700
Added tag jdk8-b90 for changeset 1ae0472ff3a0
aoqi@0 | 1 | /* |
aoqi@0 | 2 | * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved. |
aoqi@0 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
aoqi@0 | 4 | * |
aoqi@0 | 5 | * This code is free software; you can redistribute it and/or modify it |
aoqi@0 | 6 | * under the terms of the GNU General Public License version 2 only, as |
aoqi@0 | 7 | * published by the Free Software Foundation. |
aoqi@0 | 8 | * |
aoqi@0 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
aoqi@0 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
aoqi@0 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
aoqi@0 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
aoqi@0 | 13 | * accompanied this code). |
aoqi@0 | 14 | * |
aoqi@0 | 15 | * You should have received a copy of the GNU General Public License version |
aoqi@0 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
aoqi@0 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
aoqi@0 | 18 | * |
aoqi@0 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
aoqi@0 | 20 | * or visit www.oracle.com if you need additional information or have any |
aoqi@0 | 21 | * questions. |
aoqi@0 | 22 | */ |
aoqi@0 | 23 | |
aoqi@0 | 24 | /* |
aoqi@0 | 25 | * @test UnloadTest |
aoqi@0 | 26 | * @library /runtime/testlibrary /testlibrary /testlibrary/whitebox |
aoqi@0 | 27 | * @library classes |
aoqi@0 | 28 | * @build ClassUnloadCommon test.Empty |
aoqi@0 | 29 | * @build UnloadTest |
aoqi@0 | 30 | * @run main ClassFileInstaller sun.hotspot.WhiteBox |
aoqi@0 | 31 | * @run main/othervm -Xbootclasspath/a:. -Xmn8m -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI UnloadTest |
aoqi@0 | 32 | */ |
aoqi@0 | 33 | import sun.hotspot.WhiteBox; |
aoqi@0 | 34 | |
aoqi@0 | 35 | /** |
aoqi@0 | 36 | * Test that verifies that classes are unloaded when they are no longer reachable. |
aoqi@0 | 37 | * |
aoqi@0 | 38 | * The test creates a class loader, uses the loader to load a class and creates an instance |
aoqi@0 | 39 | * of that class. The it nulls out all the references to the instance, class and class loader |
aoqi@0 | 40 | * and tries to trigger class unloading. Then it verifies that the class is no longer |
aoqi@0 | 41 | * loaded by the VM. |
aoqi@0 | 42 | */ |
aoqi@0 | 43 | public class UnloadTest { |
aoqi@0 | 44 | private static String className = "test.Empty"; |
aoqi@0 | 45 | |
aoqi@0 | 46 | public static void main(String... args) throws Exception { |
aoqi@0 | 47 | run(); |
aoqi@0 | 48 | } |
aoqi@0 | 49 | |
aoqi@0 | 50 | private static void run() throws Exception { |
aoqi@0 | 51 | final WhiteBox wb = WhiteBox.getWhiteBox(); |
aoqi@0 | 52 | |
aoqi@0 | 53 | ClassUnloadCommon.failIf(wb.isClassAlive(className), "is not expected to be alive yet"); |
aoqi@0 | 54 | |
aoqi@0 | 55 | ClassLoader cl = ClassUnloadCommon.newClassLoader(); |
aoqi@0 | 56 | Class<?> c = cl.loadClass(className); |
aoqi@0 | 57 | Object o = c.newInstance(); |
aoqi@0 | 58 | |
aoqi@0 | 59 | ClassUnloadCommon.failIf(!wb.isClassAlive(className), "should be live here"); |
aoqi@0 | 60 | |
aoqi@0 | 61 | cl = null; c = null; o = null; |
aoqi@0 | 62 | ClassUnloadCommon.triggerUnloading(); |
aoqi@0 | 63 | ClassUnloadCommon.failIf(wb.isClassAlive(className), "should have been unloaded"); |
aoqi@0 | 64 | } |
aoqi@0 | 65 | } |
aoqi@0 | 66 |