--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/jtreg/runtime/logging/RedefineClasses.java	Thu Aug 23 16:47:53 2018 -0700
@@ -0,0 +1,60 @@
+/*
+ * Copyright (c) 2014, 2018, 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 8197901 8209758
+ * @summary Redefine classes with enabling logging to verify Klass:external_name() during GC.
+ * @comment This test is simplified version of runtime/RedefineTests/RedefineRunningMethods.java.
+ * @library /test/lib
+ * @modules java.compiler
+ *          java.instrument
+ *          jdk.jartool/sun.tools.jar
+ * @run main RedefineClassHelper
+ * @run main/othervm -Xmx256m -XX:MaxMetaspaceSize=64m -javaagent:redefineagent.jar -Xlog:all=trace:file=all.log RedefineClasses
+ */
+
+// package access top-level class to avoid problem with RedefineClassHelper
+// and nested types.
+class RedefineClasses_B {
+    public static void test() {
+    }
+}
+
+public class RedefineClasses {
+    static Object[] obj = new Object[20];
+    public static String newB =
+            "class RedefineClasses_B {" +
+            "    public static void test() { " +
+            "    }" +
+            "}";
+
+    public static void main(String[] args) throws Exception {
+        RedefineClassHelper.redefineClass(RedefineClasses_B.class, newB);
+        RedefineClasses_B.test();
+        for (int i = 0; i < 20 ; i++) {
+            obj[i] = new byte[10 * 1024 * 1024];
+            System.gc();
+        }
+    }
+}