--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/jtreg/runtime/appcds/jigsaw/PatchModule/PatchJavaBase.java	Mon Nov 27 20:21:34 2017 -0800
@@ -0,0 +1,73 @@
+/*
+ * Copyright (c) 2016, 2017, 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
+ * @requires (vm.opt.UseCompressedOops == null) | (vm.opt.UseCompressedOops == true)
+ * @summary sharing is disabled if java.base is patch at runtime
+ * @library ../..
+ * @library /test/hotspot/jtreg/testlibrary
+ * @library /test/lib
+ * @modules java.base/jdk.internal.misc
+ *          jdk.jartool/sun.tools.jar
+ * @build PatchMain
+ * @run main PatchJavaBase
+ */
+
+import jdk.test.lib.compiler.InMemoryJavaCompiler;
+import jdk.test.lib.process.OutputAnalyzer;
+
+public class PatchJavaBase {
+    private static String moduleJar;
+
+    public static void main(String args[]) throws Throwable {
+
+        String source = "package java.lang; "                       +
+                        "public class NewClass { "                  +
+                        "    static { "                             +
+                        "        System.out.println(\"I pass!\"); " +
+                        "    } "                                    +
+                        "}";
+
+        ClassFileInstaller.writeClassToDisk("java/lang/NewClass",
+             InMemoryJavaCompiler.compile("java.lang.NewClass", source, "--patch-module=java.base"),
+             System.getProperty("test.classes"));
+
+        JarBuilder.build("javabase", "java/lang/NewClass");
+        moduleJar = TestCommon.getTestJar("javabase.jar");
+
+        System.out.println("Test dumping with --patch-module");
+        OutputAnalyzer output =
+            TestCommon.dump(null, null,
+                "--patch-module=java.base=" + moduleJar,
+                "PatchMain", "java.lang.NewClass");
+        TestCommon.checkDump(output, "Loading classes to share");
+
+        output = TestCommon.execCommon(
+            "-XX:+UnlockDiagnosticVMOptions",
+            "--patch-module=java.base=" + moduleJar,
+            "PatchMain", "java.lang.NewClass");
+        output.shouldContain("CDS is disabled when java.base module is patched");
+    }
+}