1 /*
   2  * Copyright (c) 2015, 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 /*
  25  * @test
  26  * @summary Create daemon and non-deamon threads.
  27  *          Check the correctness of thread's status from jstack.
  28  * @modules java.base/jdk.internal.misc
  29  * @library /test/lib
  30  * @library ../share
  31  * @run main/othervm -XX:+UsePerfData DaemonThreadTest
  32  */
  33 import common.ToolResults;
  34 import utils.*;
  35 
  36 public class DaemonThreadTest {
  37 
  38     static class NormalThread extends Thread {
  39 
  40         NormalThread() {
  41         }
  42 
  43         @Override
  44         public void run() {
  45             Utils.sleep();
  46         }
  47 
  48     }
  49 
  50     static class DaemonThread extends Thread {
  51 
  52         DaemonThread() {
  53             setDaemon(true);
  54         }
  55 
  56         @Override
  57         public void run() {
  58             Utils.sleep();
  59         }
  60 
  61     }
  62 
  63     public static void main(String[] args) throws Exception {
  64         testNoDaemon();
  65         testDaemon();
  66     }
  67 
  68     private static void testNoDaemon() throws Exception {
  69         testThread(new NormalThread(), "");
  70     }
  71 
  72     private static void testDaemon() throws Exception {
  73         testThread(new DaemonThread(), "daemon");
  74     }
  75 
  76     private static void testThread(Thread thread, String expectedType) throws Exception {
  77         // Start the thread
  78         thread.start();
  79 
  80         // Run jstack tool and collect the output
  81         JstackTool jstackTool = new JstackTool(ProcessHandle.current().getPid());
  82         ToolResults results = jstackTool.measure();
  83 
  84         // Analyze the jstack output for the correct thread type
  85         JStack jstack = new DefaultFormat().parse(results.getStdoutString());
  86         ThreadStack ti = jstack.getThreadStack(thread.getName());
  87 
  88         if (!ti.getType().trim().equals(expectedType)) {
  89             throw new RuntimeException("incorrect thread type '" + ti.getType() + "' for the thread '" + thread.getName() + "'");
  90         }
  91 
  92     }
  93 
  94 }