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 }