--- /dev/null	2019-05-22 09:10:35.508023926 -0700
+++ new/test/hotspot/jtreg/runtime/TLS/T.java	2019-06-27 21:01:25.257499603 -0700
@@ -0,0 +1,75 @@
+/*
+ * Copyright (c) 2019, Google Inc. All rights reserved.
+ * 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.
+ */
+import java.lang.ProcessBuilder;
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+
+public class T {
+    public static boolean run() {
+        boolean res = false;
+        String echoInput = "foo";
+        ProcessBuilder pb = new ProcessBuilder("echo", echoInput);
+
+        try {
+            // Starting a ProcessBuilder causes the process reaper thread being
+            // created. The process reaper thread has small stack size. In JDK
+            // 13, the REAPER_DEFAULT_STACKSIZE is 128K. With JDK 8, it is 32K.
+            // Using the process reaper thread can demonstrate the TLS problem.
+            // The reaper thread can fail with StackOverflow in one of the
+            // failure mode with certain TLS sizes. In another observed
+            // failure mode the VM fails to create thread with error message
+            // 'Failed to start thread - pthread_create failed'.
+            System.out.println("Starting a new process ...");
+            Process process = pb.start();
+            process.waitFor();
+            String echoOutput = output(process.getInputStream());
+            System.out.println("Echo Output: " + echoOutput);
+            if (echoOutput.equals(echoInput)) {
+                res = true;
+            } else {
+                System.out.println("Unexpected Echo output: " + echoOutput +
+                                   ", expects: " + echoInput);
+            }
+        } catch (Exception e) {
+            System.out.println(e.toString());
+            e.printStackTrace();
+        }
+        return res;
+    }
+
+    private static String output(InputStream inputStream) throws IOException {
+        BufferedReader br = null;
+        String s = "";
+        try {
+            br = new BufferedReader(new InputStreamReader(inputStream));
+            s = br.readLine(); 
+        } finally {
+            br.close();
+        }
+        return s;
+    }
+}
+