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/share/classes
  30  * @library ../share
  31  * @build common.*
  32  *
  33  * @run main/othervm -XX:+UsePerfData DaemonThreadTest
  34  */
  35 import common.ToolResults;
  36 import utils.*;
  37 
  38 public class DaemonThreadTest {
  39 
  40     static class NormalThread extends Thread {
  41 
  42         NormalThread() {
  43         }
  44 
  45         @Override
  46         public void run() {
  47             Utils.sleep();
  48         }
  49 
  50     }
  51 
  52     static class DaemonThread extends Thread {
  53 
  54         DaemonThread() {
  55             setDaemon(true);
  56         }
  57 
  58         @Override
  59         public void run() {
  60             Utils.sleep();
  61         }
  62 
  63     }
  64 
  65     public static void main(String[] args) throws Exception {
  66         testNoDaemon();
  67         testDaemon();
  68     }
  69 
  70     private static void testNoDaemon() throws Exception {
  71         testThread(new NormalThread(), "");
  72     }
  73 
  74     private static void testDaemon() throws Exception {
  75         testThread(new DaemonThread(), "daemon");
  76     }
  77 
  78     private static void testThread(Thread thread, String expectedType) throws Exception {
  79         // Start the thread
  80         thread.start();
  81 
  82         // Run jstack tool and collect the output
  83         JstackTool jstackTool = new JstackTool(ProcessHandle.current().getPid());
  84         ToolResults results = jstackTool.measure();
  85 
  86         // Analyze the jstack output for the correct thread type
  87         JStack jstack = new DefaultFormat().parse(results.getStdoutString());
  88         ThreadStack ti = jstack.getThreadStack(thread.getName());
  89 
  90         if (!ti.getType().trim().equals(expectedType)) {
  91             throw new RuntimeException("incorrect thread type '" + ti.getType() + "' for the thread '" + thread.getName() + "'");
  92         }
  93 
  94     }
  95 
  96 }