--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/runtime/SharedArchiveFile/SpaceUtilizationCheck.java	Mon Jun 02 21:36:59 2014 -0400
@@ -0,0 +1,96 @@
+/*
+ * Copyright (c) 2014, 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
+ * @library /testlibrary
+ * @run main SpaceUtilizationCheck
+ */
+
+import com.oracle.java.testlibrary.*;
+
+import java.util.regex.Pattern;
+import java.util.regex.Matcher;
+import java.util.ArrayList;
+import java.lang.Integer;
+
+public class SpaceUtilizationCheck {
+    // Minimum allowed utilization value (percent)
+    // The goal is to have this number to be 50% for RO and RW regions
+    // Once that feature is implemented, increase the MIN_UTILIZATION to 50
+    private static final int MIN_UTILIZATION = 30;
+
+    // Only RO and RW regions are considered for this check, since they
+    // currently account for the bulk of the shared space
+    private static final int NUMBER_OF_CHECKED_SHARED_REGIONS = 2;
+
+    public static void main(String[] args) throws Exception {
+        ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
+           "-XX:+UnlockDiagnosticVMOptions",
+           "-XX:SharedArchiveFile=./test.jsa",
+           "-Xshare:dump");
+
+        OutputAnalyzer output = new OutputAnalyzer(pb.start());
+        String stdout = output.getStdout();
+        ArrayList<String> utilization = findUtilization(stdout);
+
+        if (utilization.size() != NUMBER_OF_CHECKED_SHARED_REGIONS )
+            throw new RuntimeException("The output format of sharing summary has changed");
+
+        for(String str : utilization) {
+            int value = Integer.parseInt(str);
+            if (value < MIN_UTILIZATION) {
+                System.out.println(stdout);
+                throw new RuntimeException("Utilization for one of the regions" +
+                    "is below a threshold of " + MIN_UTILIZATION + "%");
+            }
+        }
+    }
+
+    public static ArrayList<String> findUtilization(String input) {
+        ArrayList<String> regions = filterRegionsOfInterest(input.split("\n"));
+        return filterByPattern(filterByPattern(regions, "bytes \\[.*% used\\]"), "\\d+");
+    }
+
+    private static ArrayList<String> filterByPattern(Iterable<String> input, String pattern) {
+        ArrayList<String> result = new ArrayList<String>();
+        for (String str : input) {
+            Matcher matcher = Pattern.compile(pattern).matcher(str);
+            if (matcher.find()) {
+                result.add(matcher.group());
+            }
+        }
+        return result;
+    }
+
+    private static ArrayList<String> filterRegionsOfInterest(String[] inputLines) {
+        ArrayList<String> result = new ArrayList<String>();
+        for (String str : inputLines) {
+            if (str.contains("ro space:") || str.contains("rw space:")) {
+                result.add(str);
+            }
+        }
+        return result;
+    }
+}