--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/jtreg/runtime/cds/CheckSharingWithDefaultArchive.java	Mon Jul 29 10:34:20 2019 -0400
@@ -0,0 +1,66 @@
+/*
+ * Copyright (c) 2018, 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.
+ */
+
+/**
+ * @test Default CDS archive
+ * @summary Sharing should be enabled by default on supported platform/binaries.
+ *          No -Xshare:dump is needed. No -Xshare:auto or -Xshare:on in needed.
+ *          Verify a set of well-known shared classes.
+ * @requires vm.cds
+ * @library /test/lib
+ * @modules java.base/jdk.internal.misc
+ *          java.management
+ * @build sun.hotspot.WhiteBox
+ * @run driver ClassFileInstaller sun.hotspot.WhiteBox
+ * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
+ *      -XX:+WhiteBoxAPI CheckSharingWithDefaultArchive -showversion
+ */
+import jdk.test.lib.Platform;
+import jtreg.SkippedException;
+import sun.hotspot.WhiteBox;
+
+public class CheckSharingWithDefaultArchive {
+    public static void main(String[] args) throws Exception {
+        if (!Platform.isDefaultCDSArchiveSupported()) {
+            throw new SkippedException("Supported platform");
+        }
+
+        WhiteBox wb = WhiteBox.getWhiteBox();
+        String classes[] = {"java.lang.Object",
+                            "java.lang.String",
+                            "java.lang.Class"};
+        // If maping fails, sharing is disabled
+        if (wb.isSharingEnabled()) {
+            for (int i = 0; i < classes.length; i++) {
+                Class c = Class.forName(classes[i]);
+                if (wb.isSharedClass(c)) {
+                    System.out.println(classes[i] + " is shared.");
+                } else {
+                    throw new RuntimeException(classes[i] + " is not shared");
+                }
+            }
+        } else {
+           throw new SkippedException("Sharing is not enabled.");
+        }
+    }
+}