1 /* 2 * Copyright (c) 2019, Google Inc. All rights reserved. 3 * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved. 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 5 * 6 * This code is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License version 2 only, as 8 * published by the Free Software Foundation. 9 * 10 * This code is distributed in the hope that it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 * version 2 for more details (a copy is included in the LICENSE file that 14 * accompanied this code). 15 * 16 * You should have received a copy of the GNU General Public License version 17 * 2 along with this work; if not, write to the Free Software Foundation, 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 * 20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21 * or visit www.oracle.com if you need additional information or have any 22 * questions. 23 */ 24 import java.lang.ProcessBuilder; 25 import java.io.BufferedReader; 26 import java.io.IOException; 27 import java.io.InputStream; 28 import java.io.InputStreamReader; 29 30 public class T { 31 public static boolean run() { 32 boolean res = false; 33 String echoInput = "foo"; 34 ProcessBuilder pb = new ProcessBuilder("echo", echoInput); 35 36 try { 37 // Starting a ProcessBuilder causes the process reaper thread to be 38 // created. The process reaper thread has small stack size. In JDK 39 // 13, the REAPER_DEFAULT_STACKSIZE is 128K. With JDK 8, it is 32K. 40 // Using the process reaper thread can demonstrate the TLS problem. 41 // The reaper thread can fail with StackOverflow in one of the 42 // failure mode with certain TLS sizes. In another observed 43 // failure mode the VM fails to create a thread with error message 44 // 'Failed to start thread - pthread_create failed'. 45 System.out.println("Starting a new process ..."); 46 Process process = pb.start(); 47 process.waitFor(); 48 String echoOutput = output(process.getInputStream()); 49 System.out.println("Echo Output: " + echoOutput); 50 if (echoOutput.equals(echoInput)) { 51 res = true; 52 } else { 53 // 'res' is false, fail 54 System.out.println("Unexpected Echo output: " + echoOutput + 55 ", expects: " + echoInput); 56 } 57 } catch (Exception e) { 58 System.out.println(e.toString()); 59 e.printStackTrace(); 60 } 61 return res; 62 } 63 64 private static String output(InputStream inputStream) throws IOException { 65 String s = ""; 66 try (BufferedReader br = 67 new BufferedReader(new InputStreamReader(inputStream))) { 68 s = br.readLine(); 69 } 70 return s; 71 } 72 } 73