1 /* 2 * Copyright (c) 2019, 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 8220684 27 * @summary Process.waitFor(long, TimeUnit) can return false for a process 28 * that exited within the timeout 29 * @run main/othervm WaitFor 30 */ 31 32 import java.io.InputStream; 33 import java.io.OutputStream; 34 import java.util.concurrent.TimeUnit; 35 36 public class WaitFor { 37 public static void main(String[] args) throws Throwable { 38 int failCnt = 0; 39 for (int i = 0; i < 100; ++i) { 40 Process proc = new MyProcess(new ProcessBuilder("true").start()); 41 boolean exited = proc.waitFor(100, TimeUnit.MILLISECONDS); 42 if (!exited) failCnt++; 43 } 44 if (failCnt > 10) { 45 throw new RuntimeException(failCnt + " processes were still alive" 46 + " after timeout"); 47 } 48 } 49 } 50 51 /** 52 * This class uses the default implementation of java.lang.Process#waitFor(long, 53 * TimeUnit), and delegated all other calls to the actual implementation of 54 * Process. 55 */ 56 class MyProcess extends Process { 57 Process impl; 58 public MyProcess(Process impl) { this.impl = impl; } 59 public OutputStream getOutputStream() { return impl.getOutputStream(); } 60 public InputStream getInputStream() { return impl.getInputStream(); } 61 public InputStream getErrorStream() { return impl.getErrorStream(); } 62 public int waitFor() throws InterruptedException { return impl.waitFor(); } 63 public int exitValue() { return impl.exitValue(); } 64 public void destroy() { impl.destroy(); } 65 public ProcessHandle toHandle() { return impl.toHandle(); } 66 }