russell@unturf.com
0a580b313d
Authors: russell@unturf.com · brackishbert@gmail.com · foxhop.net · TimeHexOn.com Patches, unit tests, benchmarks, whitepaper, and outreach briefs. Public domain — no copyright claimed. Use freely.
64 lines
2.3 KiB
Java
64 lines
2.3 KiB
Java
/*
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* Copyright (c) 2022, 2026, 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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* @summary verify that Process Reaper threads have a null CCL
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* @bug 8269488
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* @run junit ProcessReaperCCL
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*/
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import java.io.File;
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import java.net.URL;
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import java.net.URLClassLoader;
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import java.util.List;
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import java.util.concurrent.CompletableFuture;
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import org.junit.jupiter.api.Assertions;
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import org.junit.jupiter.api.Test;
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public class ProcessReaperCCL {
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@Test
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void test() throws Exception {
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// create a class loader
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File dir = new File(".");
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URL[] urls = new URL[] {dir.toURI().toURL()};
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ClassLoader cl = new URLClassLoader(urls);
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Thread.currentThread().setContextClassLoader(cl);
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// Invoke a subprocess with processBuilder
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ProcessBuilder pb = new ProcessBuilder(List.of("echo", "abc", "xyz"));
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Process p = pb.start();
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CompletableFuture<Process> cf = p.onExit();
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int exitValue = cf.get().exitValue();
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Assertions.assertEquals(0, exitValue, "error exit value");
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// Verify all "Process Reaper" threads have a null CCL
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for (Thread th : Thread.getAllStackTraces().keySet()) {
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if (th.getName().startsWith("process reaper")) {
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Assertions.assertNull(th.getContextClassLoader(), "CCL not null");
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}
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}
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}
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}
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