Mon, 12 May 2014 06:17:05 -0700
8042804: Support invoking Hotspot tests from top level
Reviewed-by: sla, erikj
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 KeepAliveClass |
aoqi@0 | 26 | * @summary This test case uses a java.lang.Class instance to keep a class alive. |
aoqi@0 | 27 | * @library /testlibrary /testlibrary/whitebox /runtime/testlibrary |
aoqi@0 | 28 | * @library classes |
aoqi@0 | 29 | * @build KeepAliveClass test.Empty |
aoqi@0 | 30 | * @build ClassUnloadCommon |
aoqi@0 | 31 | * @run main ClassFileInstaller sun.hotspot.WhiteBox |
aoqi@0 | 32 | * @run main/othervm -Xbootclasspath/a:. -Xmn8m -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI KeepAliveClass |
aoqi@0 | 33 | */ |
aoqi@0 | 34 | |
aoqi@0 | 35 | import java.lang.ref.SoftReference; |
aoqi@0 | 36 | import sun.hotspot.WhiteBox; |
aoqi@0 | 37 | |
aoqi@0 | 38 | /** |
aoqi@0 | 39 | * Test that verifies that classes are not unloaded when specific types of references are kept to them. |
aoqi@0 | 40 | */ |
aoqi@0 | 41 | public class KeepAliveClass { |
aoqi@0 | 42 | private static final String className = "test.Empty"; |
aoqi@0 | 43 | private static final WhiteBox wb = WhiteBox.getWhiteBox(); |
aoqi@0 | 44 | public static Object escape = null; |
aoqi@0 | 45 | |
aoqi@0 | 46 | public static void main(String... args) throws Exception { |
aoqi@0 | 47 | ClassLoader cl = ClassUnloadCommon.newClassLoader(); |
aoqi@0 | 48 | Class<?> c = cl.loadClass(className); |
aoqi@0 | 49 | Object o = c.newInstance(); |
aoqi@0 | 50 | o = null; cl = null; |
aoqi@0 | 51 | escape = c; |
aoqi@0 | 52 | |
aoqi@0 | 53 | { |
aoqi@0 | 54 | boolean isAlive = wb.isClassAlive(className); |
aoqi@0 | 55 | System.out.println("testClass (1) alive: " + isAlive); |
aoqi@0 | 56 | |
aoqi@0 | 57 | ClassUnloadCommon.failIf(!isAlive, "should be alive"); |
aoqi@0 | 58 | } |
aoqi@0 | 59 | |
aoqi@0 | 60 | ClassUnloadCommon.triggerUnloading(); |
aoqi@0 | 61 | |
aoqi@0 | 62 | { |
aoqi@0 | 63 | boolean isAlive = wb.isClassAlive(className); |
aoqi@0 | 64 | System.out.println("testClass (2) alive: " + isAlive); |
aoqi@0 | 65 | |
aoqi@0 | 66 | ClassUnloadCommon.failIf(!isAlive, "should be alive"); |
aoqi@0 | 67 | } |
aoqi@0 | 68 | c = null; |
aoqi@0 | 69 | escape = null; |
aoqi@0 | 70 | ClassUnloadCommon.triggerUnloading(); |
aoqi@0 | 71 | |
aoqi@0 | 72 | { |
aoqi@0 | 73 | boolean isAlive = wb.isClassAlive(className); |
aoqi@0 | 74 | System.out.println("testClass (3) alive: " + isAlive); |
aoqi@0 | 75 | ClassUnloadCommon.failIf(isAlive, "should be unloaded"); |
aoqi@0 | 76 | } |
aoqi@0 | 77 | |
aoqi@0 | 78 | } |
aoqi@0 | 79 | } |