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