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 * @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 }