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.ProcessTools jdk.testlibrary.JDKToolLauncher 32 * @build 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 PID = "PID"; 47 private static final String READY = "READY"; 48 private static final String ERROR = "!ERROR"; 49 50 public static class Application { 51 public static void main(String[] args) { 52 try { 53 System.out.println(PID + ":" + ProcessTools.getProcessId()); 54 System.out.println(READY); 55 System.out.flush(); 56 int exitCode = System.in.read(); 57 Thread.sleep(500); 58 System.exit(exitCode); 59 } catch (Exception e) { 60 System.out.println(ERROR); 61 System.out.flush(); 62 throw new Error(e); 63 } 64 } 65 } 66 public static void main(String[] args) throws Exception { 67 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder( 68 "-cp", 69 System.getProperty("test.class.path"), 70 "-XX:+UsePerfData", 71 Application.class.getName() 72 ); 73 AtomicInteger pid = new AtomicInteger(-1); 74 AtomicBoolean error = new AtomicBoolean(false); 75 Process app = ProcessTools.startProcess( 76 "application", 77 pb, 78 line -> { 79 if (line.startsWith(PID)) { 80 pid.set(Integer.parseInt(line.split("\\:")[1])); 81 } else if (line.equals(READY)) { 82 return true; 83 } else if (line.equals(ERROR)) { 84 error.set(true); 85 return true; 86 } 87 return false; 88 }, 89 10, 90 TimeUnit.SECONDS 91 ); 92 if (error.get()) { 93 throw new Error("Unable to start the monitored application."); 94 } 95 96 String pidStr = String.valueOf(pid.get()); 97 JDKToolLauncher l = JDKToolLauncher.createUsingTestJDK("jstat"); 98 l.addToolArg("-compiler"); 99 l.addToolArg(pidStr); 100 l.addToolArg("100"); 101 102 ProcessBuilder jstatDef = new ProcessBuilder(l.getCommand()); 103 Process jstat = ProcessTools.startProcess( 104 "jstat", 105 jstatDef, 106 line -> { 107 if (line.trim().toLowerCase().startsWith("compiled")) { 108 return true; 109 } 110 return false; 111 }, 112 10, 113 TimeUnit.SECONDS 114 ); 115 116 app.getOutputStream().write(0); 117 app.getOutputStream().flush(); 118 119 if (app.waitFor() != 0) { 120 throw new Error("Error detected upon exiting the monitored application with active jstat"); 121 } 122 if (jstat.waitFor() != 0) { 123 throw new Error("Error detected in jstat when monitored application has exited prematurely"); 124 } 125 } 126 }