Mercurial > jdk8-mips64-public > hotspot / file comparison
comparison: test/runtime/testlibrary/ClassUnloadCommon.java
test/runtime/testlibrary/ClassUnloadCommon.java
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| 1 /* | |
| 2 * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved. | |
| 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
| 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 20 * or visit www.oracle.com if you need additional information or have any | |
| 21 * questions. | |
| 22 */ | |
| 23 | |
| 24 import java.io.File; | |
| 25 import java.net.MalformedURLException; | |
| 26 import java.net.URL; | |
| 27 import java.net.URLClassLoader; | |
| 28 import java.nio.file.Paths; | |
| 29 import java.util.ArrayList; | |
| 30 | |
| 31 public class ClassUnloadCommon { | |
| 32 public static class TestFailure extends RuntimeException { | |
| 33 TestFailure(String msg) { | |
| 34 super(msg); | |
| 35 } | |
| 36 } | |
| 37 | |
| 38 public static void failIf(boolean value, String msg) { | |
| 39 if (value) throw new TestFailure("Test failed: " + msg); | |
| 40 } | |
| 41 | |
| 42 private static volatile Object dummy = null; | |
| 43 private static void allocateMemory(int kilobytes) { | |
| 44 ArrayList<byte[]> l = new ArrayList<>(); | |
| 45 dummy = l; | |
| 46 for (int i = kilobytes; i > 0; i -= 1) { | |
| 47 l.add(new byte[1024]); | |
| 48 } | |
| 49 l = null; | |
| 50 dummy = null; | |
| 51 } | |
| 52 | |
| 53 public static void triggerUnloading() { | |
| 54 allocateMemory(16 * 1024); // yg size is 8m with cms, force young collection | |
| 55 System.gc(); | |
| 56 } | |
| 57 | |
| 58 public static ClassLoader newClassLoader() { | |
| 59 try { | |
| 60 return new URLClassLoader(new URL[] { | |
| 61 Paths.get(System.getProperty("test.classes",".") + File.separatorChar + "classes").toUri().toURL(), | |
| 62 }, null); | |
| 63 } catch (MalformedURLException e){ | |
| 64 throw new RuntimeException("Unexpected URL conversion failure", e); | |
| 65 } | |
| 66 } | |
| 67 | |
| 68 } |
