| /* |
| * 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. |
| */ |
| |
| import java.io.File; |
| import java.net.MalformedURLException; |
| import java.net.URL; |
| import java.net.URLClassLoader; |
| import java.nio.file.Paths; |
| import java.util.ArrayList; |
| |
| public class ClassUnloadCommon { |
| public static class TestFailure extends RuntimeException { |
| TestFailure(String msg) { |
| super(msg); |
| } |
| } |
| |
| public static void failIf(boolean value, String msg) { |
| if (value) throw new TestFailure("Test failed: " + msg); |
| } |
| |
| private static volatile Object dummy = null; |
| private static void allocateMemory(int kilobytes) { |
| ArrayList<byte[]> l = new ArrayList<>(); |
| dummy = l; |
| for (int i = kilobytes; i > 0; i -= 1) { |
| l.add(new byte[1024]); |
| } |
| l = null; |
| dummy = null; |
| } |
| |
| public static void triggerUnloading() { |
| allocateMemory(16 * 1024); // yg size is 8m with cms, force young collection |
| System.gc(); |
| } |
| |
| public static ClassLoader newClassLoader() { |
| try { |
| return new URLClassLoader(new URL[] { |
| Paths.get(System.getProperty("test.classes",".") + File.separatorChar + "classes").toUri().toURL(), |
| }, null); |
| } catch (MalformedURLException e){ |
| throw new RuntimeException("Unexpected URL conversion failure", e); |
| } |
| } |
| |
| } |