--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/jtreg/runtime/cds/SpaceUtilizationCheck.java	Mon Jul 29 10:34:20 2019 -0400
@@ -0,0 +1,109 @@
+/*
+ * Copyright (c) 2014, 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 SpaceUtilizationCheck
+ * @summary Check if the space utilization for shared spaces is adequate
+ * @requires vm.cds
+ * @library /test/lib
+ * @modules java.base/jdk.internal.misc
+ *          java.management
+ * @build sun.hotspot.WhiteBox
+ * @run driver ClassFileInstaller sun.hotspot.WhiteBox
+ *                              sun.hotspot.WhiteBox$WhiteBoxPermission
+ * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI SpaceUtilizationCheck
+ */
+
+import jdk.test.lib.cds.CDSTestUtils;
+import jdk.test.lib.process.OutputAnalyzer;
+import sun.hotspot.WhiteBox;
+
+import java.util.regex.Pattern;
+import java.util.regex.Matcher;
+import java.util.ArrayList;
+import java.util.Hashtable;
+import java.lang.Integer;
+
+public class SpaceUtilizationCheck {
+    // [1] Each region must have strictly less than
+    //     WhiteBox.metaspaceReserveAlignment() bytes of unused space.
+    // [2] There must be no gap between two consecutive regions.
+
+    public static void main(String[] args) throws Exception {
+        // (1) Default VM arguments
+        test();
+
+        // (2) Use the now deprecated VM arguments. They should have no effect.
+        test("-XX:SharedReadWriteSize=128M",
+             "-XX:SharedReadOnlySize=128M",
+             "-XX:SharedMiscDataSize=128M",
+             "-XX:SharedMiscCodeSize=128M");
+    }
+
+    static void test(String... extra_options) throws Exception {
+        OutputAnalyzer output = CDSTestUtils.createArchive(extra_options);
+        CDSTestUtils.checkDump(output);
+        Pattern pattern = Pattern.compile("^(..) *space: *([0-9]+).* out of *([0-9]+) bytes .* at 0x([0-9a0-f]+)");
+        WhiteBox wb = WhiteBox.getWhiteBox();
+        long reserve_alignment = wb.metaspaceReserveAlignment();
+        System.out.println("Metaspace::reserve_alignment() = " + reserve_alignment);
+
+        long last_region = -1;
+        Hashtable<String,String> checked = new Hashtable<>();
+        for (String line : output.getStdout().split("\n")) {
+            if (line.contains(" space:") && !line.contains("st space:")) {
+                Matcher matcher = pattern.matcher(line);
+                if (matcher.find()) {
+                    String name = matcher.group(1);
+                    if (name.equals("s0") || name.equals("s1")) {
+                      // String regions are listed at the end and they may not be fully occupied.
+                      break;
+                    } else {
+                      System.out.println("Checking " + name + " in : " + line);
+                      checked.put(name, name);
+                    }
+                    long used = Long.parseLong(matcher.group(2));
+                    long capacity = Long.parseLong(matcher.group(3));
+                    long address = Long.parseLong(matcher.group(4), 16);
+                    long unused = capacity - used;
+                    if (unused < 0) {
+                        throw new RuntimeException("Unused space (" + unused + ") less than 0");
+                    }
+                    if (unused > reserve_alignment) {
+                        // [1] Check for unused space
+                        throw new RuntimeException("Unused space (" + unused + ") must be smaller than Metaspace::reserve_alignment() (" +
+                                                   reserve_alignment + ")");
+                    }
+                    if (last_region >= 0 && address != last_region) {
+                        // [2] Check for no-gap
+                        throw new RuntimeException("Region 0x" + address + " should have started at 0x" + Long.toString(last_region, 16));
+                    }
+                    last_region = address + capacity;
+                }
+            }
+        }
+        if (checked.size() != 4) {
+          throw new RuntimeException("Must have 4 consecutive, fully utilized regions");
+        }
+    }
+}