Mercurial > hg > graal-compiler
view test/gc/g1/TestDeferredRSUpdate.java @ 20443:64b480f9eb1a
Merge
author | ctornqvi |
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date | Wed, 10 Sep 2014 17:36:20 +0000 |
parents | e8ba50da0de0 |
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/* * Copyright (c) 2014, 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 TestDeferredRSUpdate * @bug 8040977 8052170 * @summary Ensure that running with -XX:-G1DeferredRSUpdate does not crash the VM * @key gc * @library /testlibrary */ import com.oracle.java.testlibrary.ProcessTools; import com.oracle.java.testlibrary.OutputAnalyzer; public class TestDeferredRSUpdate { public static void main(String[] args) throws Exception { GCTest.main(args); ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC", "-Xmx10M", "-XX:+PrintGCDetails", // G1DeferredRSUpdate is a develop option, but we cannot limit execution of this test to only debug VMs. "-XX:+IgnoreUnrecognizedVMOptions", "-XX:-G1DeferredRSUpdate", GCTest.class.getName()); OutputAnalyzer output = new OutputAnalyzer(pb.start()); output.shouldHaveExitValue(0); } static class GCTest { private static Object[] garbage = new Object[32]; public static void main(String [] args) { System.out.println("Creating garbage"); // Create 128MB of garbage. This should result in at least one minor GC, with // some objects copied to old gen. As references from old to young are installed, // the crash due to the use before initialize occurs. Object prev = null; Object prevPrev = null; for (int i = 0; i < 1024; i++) { Object[] next = new Object[32 * 1024]; next[0] = prev; next[1] = prevPrev; Object[] cur = (Object[]) garbage[i % garbage.length]; if (cur != null) { cur[0] = null; cur[1] = null; } garbage[i % garbage.length] = next; prevPrev = prev; prev = next; } System.out.println("Done"); } } }