1 /*
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   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  * @modules java.management
  32  * @build jdk.testlibrary.* JStatInterval
  33  * @run main JStatInterval
  34  */
  35 
  36 import jdk.testlibrary.ProcessTools;
  37 import jdk.testlibrary.JDKToolLauncher;
  38 
  39 import java.io.BufferedReader;
  40 import java.io.InputStreamReader;
  41 import java.util.concurrent.TimeUnit;
  42 import java.util.concurrent.atomic.AtomicBoolean;
  43 import java.util.concurrent.atomic.AtomicInteger;
  44 
  45 public class JStatInterval {
  46     private static final String READY = "READY";
  47     private static final String ERROR = "!ERROR";
  48 
  49     public static class Application {
  50         public static void main(String[] args) {
  51             try {
  52                 System.out.println(READY);
  53                 System.out.flush();
  54                 int exitCode = System.in.read();
  55                 Thread.sleep(500);
  56                 System.exit(exitCode);
  57             } catch (Exception e) {
  58                 System.out.println(ERROR);
  59                 System.out.flush();
  60                 throw new Error(e);
  61             }
  62         }
  63     }
  64     public static void main(String[] args) throws Exception {
  65         ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
  66             "-cp",
  67             System.getProperty("test.class.path"),
  68             "-XX:+UsePerfData",
  69             Application.class.getName()
  70         );
  71         AtomicBoolean error = new AtomicBoolean(false);
  72         Process app = ProcessTools.startProcess(
  73             "application",
  74             pb,
  75             line -> {
  76                 if (line.equals(READY)) {
  77                     return true;
  78                 } else if (line.equals(ERROR)) {
  79                     error.set(true);
  80                     return true;
  81                 }
  82                 return false;
  83             },
  84             10,
  85             TimeUnit.SECONDS
  86         );
  87         if (error.get()) {
  88             throw new Error("Unable to start the monitored application.");
  89         }
  90 
  91         String pidStr = String.valueOf(app.getPid());
  92         JDKToolLauncher l = JDKToolLauncher.createUsingTestJDK("jstat");
  93         l.addToolArg("-compiler");
  94         l.addToolArg(pidStr);
  95         l.addToolArg("100");
  96 
  97         ProcessBuilder jstatDef = new ProcessBuilder(l.getCommand());
  98         Process jstat = ProcessTools.startProcess(
  99             "jstat",
 100             jstatDef,
 101             line -> {
 102                 if (line.trim().toLowerCase().startsWith("compiled")) {
 103                     return true;
 104                 }
 105                 return false;
 106             },
 107             10,
 108             TimeUnit.SECONDS
 109         );
 110 
 111         app.getOutputStream().write(0);
 112         app.getOutputStream().flush();
 113 
 114         if (app.waitFor() != 0) {
 115             throw new Error("Error detected upon exiting the monitored application with active jstat");
 116         }
 117         if (jstat.waitFor() != 0) {
 118             throw new Error("Error detected in jstat when monitored application has exited prematurely");
 119         }
 120     }
 121 }