238c17bdb5
Adjust thread stack size for static TLS on Linux when AdjustStackSizeForTLS is enabled. Co-authored-by: Florian Weimer <fweimer@redhat.com> Co-authored-by: Jiangli Zhou <jianglizhou@google.com> Reviewed-by: dholmes, fweimer, stuefe, rriggs, martin
74 lines
3.0 KiB
Java
74 lines
3.0 KiB
Java
/*
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* Copyright (c) 2019, Google Inc. All rights reserved.
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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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import java.lang.ProcessBuilder;
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import java.io.BufferedReader;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.InputStreamReader;
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public class T {
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public static boolean run() {
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boolean res = false;
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String echoInput = "foo";
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ProcessBuilder pb = new ProcessBuilder("echo", echoInput);
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try {
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// Starting a ProcessBuilder causes the process reaper thread to be
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// created. The process reaper thread has small stack size. In JDK
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// 13, the REAPER_DEFAULT_STACKSIZE is 128K. With JDK 8, it is 32K.
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// Using the process reaper thread can demonstrate the TLS problem.
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// The reaper thread can fail with StackOverflow in one of the
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// failure mode with certain TLS sizes. In another observed
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// failure mode the VM fails to create a thread with error message
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// 'Failed to start thread - pthread_create failed'.
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System.out.println("Starting a new process ...");
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Process process = pb.start();
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process.waitFor();
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String echoOutput = output(process.getInputStream());
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System.out.println("Echo Output: " + echoOutput);
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if (echoOutput.equals(echoInput)) {
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res = true;
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} else {
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// 'res' is false, fail
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System.out.println("Unexpected Echo output: " + echoOutput +
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", expects: " + echoInput);
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}
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} catch (Exception e) {
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System.out.println(e.toString());
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e.printStackTrace();
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}
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return res;
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}
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private static String output(InputStream inputStream) throws IOException {
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String s = "";
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try (BufferedReader br =
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new BufferedReader(new InputStreamReader(inputStream))) {
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s = br.readLine();
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}
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return s;
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}
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}
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