67 lines
2.6 KiB
Java
67 lines
2.6 KiB
Java
/*
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* Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 8220684
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* @summary Process.waitFor(long, TimeUnit) can return false for a process
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* that exited within the timeout
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* @run main/othervm WaitFor
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*/
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import java.io.InputStream;
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import java.io.OutputStream;
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import java.util.concurrent.TimeUnit;
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public class WaitFor {
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public static void main(String[] args) throws Throwable {
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int failCnt = 0;
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for (int i = 0; i < 30; ++i) {
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Process proc = new MyProcess(new ProcessBuilder("true").start());
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boolean exited = proc.waitFor(100, TimeUnit.MILLISECONDS);
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if (!exited && !proc.isAlive()) failCnt++;
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}
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if (failCnt > 10) {
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throw new RuntimeException(failCnt + " processes were still alive"
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+ " after timeout");
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}
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}
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}
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/**
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* This class uses the default implementation of java.lang.Process#waitFor(long,
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* TimeUnit), and delegates all other calls to the actual implementation of
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* Process.
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*/
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class MyProcess extends Process {
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Process impl;
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public MyProcess(Process impl) { this.impl = impl; }
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public OutputStream getOutputStream() { return impl.getOutputStream(); }
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public InputStream getInputStream() { return impl.getInputStream(); }
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public InputStream getErrorStream() { return impl.getErrorStream(); }
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public int waitFor() throws InterruptedException { return impl.waitFor(); }
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public int exitValue() { return impl.exitValue(); }
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public void destroy() { impl.destroy(); }
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public ProcessHandle toHandle() { return impl.toHandle(); }
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}
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