--- /dev/null 2013-02-13 16:43:42.000000000 -0800 +++ new/test/gc/8005875/Test8005875.java 2013-02-13 16:43:42.378324291 -0800 @@ -0,0 +1,52 @@ +/* + * 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 + * @summary Use jcmd to generate a thread dump of a Java program being run with G1 and PGCT=0 to verify 8005875 + * @library /testlibrary + * @run main/othervm -XX:+UseG1GC -XX:ParallelGCThreads=0 -XX:+IgnoreUnrecognizedVMOptions Test8005875 + */ + +import com.oracle.java.testlibrary.*; + +public class Test8005875 { + public static void main(String args[]) throws Exception { + + // Grab the pid from the current java process + String pid = Integer.toString(ProcessTools.getProcessId()); + + // Create a ProcessBuilder + ProcessBuilder pb = new ProcessBuilder(); + + // Run jcmd Thread.print + pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "Thread.print"}); + + OutputAnalyzer output = new OutputAnalyzer(pb.start()); + + // There shouldn't be a work gang for concurrent marking. + output.shouldNotContain("G1 Parallel Marking Threads"); + + // Make sure we didn't crash + output.shouldHaveExitValue(0); + } +}