Mercurial > hg > graal-compiler
diff test/runtime/Metaspace/FragmentMetaspaceSimple.java @ 10344:699d9df07e59
8009576: Test returns ClassNotFoundException
Summary: Small classpath fix and move tests into open
Reviewed-by: mgerdin, zgu
author | ctornqvi |
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date | Thu, 23 May 2013 17:39:32 +0200 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/test/runtime/Metaspace/FragmentMetaspaceSimple.java Thu May 23 17:39:32 2013 +0200 @@ -0,0 +1,69 @@ +/* + * 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. + */ + +/** + * @test + * @library /runtime/testlibrary + * @library classes + * @build test.Empty ClassUnloadCommon + * @run main/othervm/timeout=200 FragmentMetaspaceSimple + */ + +import java.util.ArrayList; + +/** + * Test that tries to fragment the native memory used by class loaders. + * Keeps every other class loader alive in order to fragment the memory space + * used to store classes and meta data. Since the memory is probably allocated in + * chunks per class loader this will cause a lot of fragmentation if not handled + * properly since every other chunk will be unused. + */ +public class FragmentMetaspaceSimple { + public static void main(String... args) { + runSimple(Long.valueOf(System.getProperty("time", "80000"))); + System.gc(); + } + + private static void runSimple(long time) { + long startTime = System.currentTimeMillis(); + ArrayList<ClassLoader> cls = new ArrayList<>(); + for (int i = 0; System.currentTimeMillis() < startTime + time; ++i) { + ClassLoader ldr = ClassUnloadCommon.newClassLoader(); + if (i % 1000 == 0) { + cls.clear(); + } + // only keep every other class loader alive + if (i % 2 == 1) { + cls.add(ldr); + } + Class<?> c = null; + try { + c = ldr.loadClass("test.Empty"); + } catch (ClassNotFoundException ex) { + throw new RuntimeException(ex); + } + c = null; + } + cls = null; + } +}