--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/jtreg/runtime/cds/appcds/sharedStrings/SharedStringsHumongous.java	Mon Jul 29 10:34:20 2019 -0400
@@ -0,0 +1,96 @@
+/*
+ * 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
+ * @summary Use a shared string allocated in a humongous G1 region.
+ * @comment -- the following implies that G1 is used (by command-line or by default)
+ * @requires vm.cds.archived.java.heap
+ *
+ * @library /test/hotspot/jtreg/runtime/cds/appcds /test/lib
+ * @modules jdk.jartool/sun.tools.jar
+ * @build HelloString
+ * @build sun.hotspot.WhiteBox
+ * @run driver ClassFileInstaller sun.hotspot.WhiteBox sun.hotspot.WhiteBox$WhiteBoxPermission
+ * @run main/othervm -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -Xbootclasspath/a:. SharedStringsHumongous
+ */
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.OutputStreamWriter;
+import java.io.PrintWriter;
+import sun.hotspot.WhiteBox;
+import jdk.test.lib.process.OutputAnalyzer;
+import jdk.test.lib.process.ProcessTools;
+import jdk.test.lib.Asserts;
+
+public class SharedStringsHumongous {
+    static String sharedArchiveConfigFile = System.getProperty("user.dir") + File.separator + "SharedStringsHumongous_gen.txt";
+
+    public static void main(String[] args) throws Exception {
+        WhiteBox wb = WhiteBox.getWhiteBox();
+
+        try (FileOutputStream fos = new FileOutputStream(sharedArchiveConfigFile)) {
+            PrintWriter out = new PrintWriter(new OutputStreamWriter(fos));
+            out.println("VERSION: 1.0");
+            out.println("@SECTION: String");
+            out.println("31: shared_test_string_unique_14325");
+            int region_size = wb.g1RegionSize();
+            char body[] = new char[region_size + region_size / 2];
+            for (int i = 0; i < body.length; i++) {
+              body[i] = 'x';
+            }
+            Asserts.assertTrue(wb.g1IsHumongous(body));
+            String prefix = "generated_string (followed by " + body.length + " 'x') ";
+
+            System.out.println("G1 region size: " + region_size);
+            System.out.println("Using a humongous string: " + prefix);
+
+            String s = prefix + new String(body);
+            out.println(s.length() + ": " + s);
+            out.close();
+        }
+
+        SharedStringsUtils.run(args, SharedStringsHumongous::test);
+    }
+
+    public static void test(String[] args) throws Exception {
+        String vmOptionsPrefix[] = SharedStringsUtils.getChildVMOptionsPrefix();
+        String appJar = JarBuilder.build("SharedStringsHumongous", "HelloString");
+
+        OutputAnalyzer dumpOutput = TestCommon.dump(appJar, TestCommon.list("HelloString"),
+                TestCommon.concat(vmOptionsPrefix,
+                    "-XX:SharedArchiveConfigFile=" + sharedArchiveConfigFile,
+                    "-Xlog:gc+region+cds",
+                    "-Xlog:gc+region=trace"));
+        TestCommon.checkDump(dumpOutput, "extra interned string ignored; size too large");
+        // Extra strings that are humongous are not kelp alive, so they should be GC'ed
+        // before dumping the string table. That means the heap should contain no
+        // humongous regions.
+        dumpOutput.shouldNotMatch("gc,region,cds. HeapRegion 0x[0-9a-f]* HUM");
+
+        OutputAnalyzer execOutput = TestCommon.exec(appJar,
+            TestCommon.concat(vmOptionsPrefix, "HelloString"));
+        TestCommon.checkExec(execOutput);
+    }
+}