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