1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000 1.2 +++ b/test/runtime/testlibrary/ClassUnloadCommon.java Wed Apr 27 01:25:04 2016 +0800 1.3 @@ -0,0 +1,68 @@ 1.4 +/* 1.5 + * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved. 1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 1.7 + * 1.8 + * This code is free software; you can redistribute it and/or modify it 1.9 + * under the terms of the GNU General Public License version 2 only, as 1.10 + * published by the Free Software Foundation. 1.11 + * 1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT 1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 1.15 + * version 2 for more details (a copy is included in the LICENSE file that 1.16 + * accompanied this code). 1.17 + * 1.18 + * You should have received a copy of the GNU General Public License version 1.19 + * 2 along with this work; if not, write to the Free Software Foundation, 1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 1.21 + * 1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 1.23 + * or visit www.oracle.com if you need additional information or have any 1.24 + * questions. 1.25 + */ 1.26 + 1.27 +import java.io.File; 1.28 +import java.net.MalformedURLException; 1.29 +import java.net.URL; 1.30 +import java.net.URLClassLoader; 1.31 +import java.nio.file.Paths; 1.32 +import java.util.ArrayList; 1.33 + 1.34 +public class ClassUnloadCommon { 1.35 + public static class TestFailure extends RuntimeException { 1.36 + TestFailure(String msg) { 1.37 + super(msg); 1.38 + } 1.39 + } 1.40 + 1.41 + public static void failIf(boolean value, String msg) { 1.42 + if (value) throw new TestFailure("Test failed: " + msg); 1.43 + } 1.44 + 1.45 + private static volatile Object dummy = null; 1.46 + private static void allocateMemory(int kilobytes) { 1.47 + ArrayList<byte[]> l = new ArrayList<>(); 1.48 + dummy = l; 1.49 + for (int i = kilobytes; i > 0; i -= 1) { 1.50 + l.add(new byte[1024]); 1.51 + } 1.52 + l = null; 1.53 + dummy = null; 1.54 + } 1.55 + 1.56 + public static void triggerUnloading() { 1.57 + allocateMemory(16 * 1024); // yg size is 8m with cms, force young collection 1.58 + System.gc(); 1.59 + } 1.60 + 1.61 + public static ClassLoader newClassLoader() { 1.62 + try { 1.63 + return new URLClassLoader(new URL[] { 1.64 + Paths.get(System.getProperty("test.classes",".") + File.separatorChar + "classes").toUri().toURL(), 1.65 + }, null); 1.66 + } catch (MalformedURLException e){ 1.67 + throw new RuntimeException("Unexpected URL conversion failure", e); 1.68 + } 1.69 + } 1.70 + 1.71 +}