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