1 /*
   2  * Copyright (c) 2014, 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  * @bug 8035668
  27  * @summary Test checks case when target application finishes execution and jstat didn't complete work.
  28  *          jstat is started with interval = 100 (jstat -compiler 100) and monitored application finishes
  29  *          after 500ms. This shouldn't cause crash or hang in target application or in jstat.
  30  *
  31  * @library /lib/testlibrary
  32  * @modules java.management
  33  *          jdk.jcmd
  34  *
  35  * @build jdk.testlibrary.* JStatInterval
  36  * @run main JStatInterval
  37  */
  38 
  39 import jdk.testlibrary.ProcessTools;
  40 import jdk.testlibrary.JDKToolLauncher;
  41 
  42 import java.io.BufferedReader;
  43 import java.io.InputStreamReader;
  44 import java.util.concurrent.TimeUnit;
  45 import java.util.concurrent.atomic.AtomicBoolean;
  46 import java.util.concurrent.atomic.AtomicInteger;
  47 
  48 public class JStatInterval {
  49     private static final String READY = "READY";
  50     private static final String ERROR = "!ERROR";
  51 
  52     public static class Application {
  53         public static void main(String[] args) {
  54             try {
  55                 System.out.println(READY);
  56                 System.out.flush();
  57                 int exitCode = System.in.read();
  58                 Thread.sleep(500);
  59                 System.exit(exitCode);
  60             } catch (Exception e) {
  61                 System.out.println(ERROR);
  62                 System.out.flush();
  63                 throw new Error(e);
  64             }
  65         }
  66     }
  67     public static void main(String[] args) throws Exception {
  68         ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
  69             "-cp",
  70             System.getProperty("test.class.path"),
  71             "-XX:+UsePerfData",
  72             Application.class.getName()
  73         );
  74         AtomicBoolean error = new AtomicBoolean(false);
  75         Process app = ProcessTools.startProcess(
  76             "application",
  77             pb,
  78             line -> {
  79                 if (line.equals(READY)) {
  80                     return true;
  81                 } else if (line.equals(ERROR)) {
  82                     error.set(true);
  83                     return true;
  84                 }
  85                 return false;
  86             },
  87             10,
  88             TimeUnit.SECONDS
  89         );
  90         if (error.get()) {
  91             throw new Error("Unable to start the monitored application.");
  92         }
  93 
  94         String pidStr = String.valueOf(app.getPid());
  95         JDKToolLauncher l = JDKToolLauncher.createUsingTestJDK("jstat");
  96         l.addToolArg("-compiler");
  97         l.addToolArg(pidStr);
  98         l.addToolArg("100");
  99 
 100         ProcessBuilder jstatDef = new ProcessBuilder(l.getCommand());
 101         Process jstat = ProcessTools.startProcess(
 102             "jstat",
 103             jstatDef,
 104             line -> {
 105                 if (line.trim().toLowerCase().startsWith("compiled")) {
 106                     return true;
 107                 }
 108                 return false;
 109             },
 110             10,
 111             TimeUnit.SECONDS
 112         );
 113 
 114         app.getOutputStream().write(0);
 115         app.getOutputStream().flush();
 116 
 117         if (app.waitFor() != 0) {
 118             throw new Error("Error detected upon exiting the monitored application with active jstat");
 119         }
 120         if (jstat.waitFor() != 0) {
 121             throw new Error("Error detected in jstat when monitored application has exited prematurely");
 122         }
 123     }
 124 }