--- /dev/null	2017-11-09 09:38:01.297999907 +0100
+++ new/test/lib/jdk/test/lib/thread/XRun.java	2018-04-09 19:11:49.798009120 +0200
@@ -0,0 +1,56 @@
+/*
+ * Copyright (c) 2013, 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.
+ */
+
+package jdk.test.lib.thread;
+
+/**
+ * This type serves no other purpose than to simply allow automatically running
+ * something in a thread, and have all exceptions propagated to
+ * RuntimeExceptions, which are thrown up to thread, which in turn should
+ * probably be a {@link TestThread} to they are stored.
+ */
+public abstract class XRun implements Runnable {
+
+    /**
+     * Invokes {@code xrun()} and throws all exceptions caught in it
+     * up to the thread.
+     */
+    public final void run() {
+        try {
+            xrun();
+        } catch (Error e) {
+            throw e;
+        } catch (RuntimeException e) {
+            throw e;
+        } catch (Throwable e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    /**
+     * Override this method to implement what to run in the thread.
+     *
+     * @throws Throwable
+     */
+    protected abstract void xrun() throws Throwable;
+}