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 /* @test TestG1ZeroPGCTJcmdThreadPrint 25 * @key gc 26 * @bug 8005875 27 * @summary Use jcmd to generate a thread dump of a Java program being run with PGCT=0 to verify 8005875 28 * @library /testlibrary 29 * @run main/othervm -XX:+UseG1GC -XX:ParallelGCThreads=0 -XX:+IgnoreUnrecognizedVMOptions TestG1ZeroPGCTJcmdThreadPrint 30 */ 31 32 import com.oracle.java.testlibrary.*; 33 34 public class TestG1ZeroPGCTJcmdThreadPrint { 35 public static void main(String args[]) throws Exception { 36 37 // Grab the pid from the current java process 38 String pid = Integer.toString(ProcessTools.getProcessId()); 39 40 // Create a ProcessBuilder 41 ProcessBuilder pb = new ProcessBuilder(); 42 43 // Run jcmd <pid> Thread.print 44 pb.command(JDKToolFinder.getJDKTool("jcmd"), pid, "Thread.print"); 45 46 OutputAnalyzer output = new OutputAnalyzer(pb.start()); 47 48 // There shouldn't be a work gang for concurrent marking. 49 output.shouldNotContain("G1 Parallel Marking Threads"); 50 51 // Make sure we didn't crash 52 output.shouldHaveExitValue(0); 53 } 54 }