--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/jtreg/gc/metaspace/CompressedClassSpaceSizeInJmapHeap.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,96 @@
+/*
+ * Copyright (c) 2013, 2016, 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 CompressedClassSpaceSizeInJmapHeap
+ * @bug 8004924
+ * @summary Checks that jmap -heap contains the flag CompressedClassSpaceSize
+ * @library /test/lib
+ * @modules java.base/jdk.internal.misc
+ *          java.management
+ * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:CompressedClassSpaceSize=50m CompressedClassSpaceSizeInJmapHeap
+ */
+
+import jdk.test.lib.JDKToolLauncher;
+import jdk.test.lib.Platform;
+import jdk.test.lib.process.OutputAnalyzer;
+import jdk.test.lib.process.ProcessTools;
+import java.nio.file.*;
+import java.io.File;
+import java.nio.charset.Charset;
+import java.util.List;
+
+public class CompressedClassSpaceSizeInJmapHeap {
+    // Note that on some platforms it may require root privileges to run this test.
+    public static void main(String[] args) throws Exception {
+        if (!Platform.is64bit()) {
+            // Compressed Class Space is only available on 64-bit JVMs
+            return;
+        }
+        if (!Platform.shouldSAAttach()) {
+            System.out.println("SA attach not expected to work - test skipped.");
+            return;
+        }
+
+        String pid = Long.toString(ProcessTools.getProcessId());
+
+        JDKToolLauncher jmap = JDKToolLauncher.create("jhsdb")
+                                              .addToolArg("jmap")
+                                              .addToolArg("--heap")
+                                              .addToolArg("--pid")
+                                              .addToolArg(pid);
+        ProcessBuilder pb = new ProcessBuilder(jmap.getCommand());
+
+        File out = new File("CompressedClassSpaceSizeInJmapHeap.stdout.txt");
+        pb.redirectOutput(out);
+
+        File err = new File("CompressedClassSpaceSizeInJmapHeap.stderr.txt");
+        pb.redirectError(err);
+
+        run(pb);
+
+        OutputAnalyzer output = new OutputAnalyzer(read(out));
+        output.shouldContain("CompressedClassSpaceSize = 52428800 (50.0MB)");
+        out.delete();
+    }
+
+    private static void run(ProcessBuilder pb) throws Exception {
+        Process p = pb.start();
+        p.waitFor();
+        int exitValue = p.exitValue();
+        if (exitValue != 0) {
+            throw new Exception("jmap -heap exited with error code: " + exitValue);
+        }
+    }
+
+    private static String read(File f) throws Exception {
+        Path p = f.toPath();
+        List<String> lines = Files.readAllLines(p, Charset.defaultCharset());
+
+        StringBuilder sb = new StringBuilder();
+        for (String line : lines) {
+            sb.append(line).append('\n');
+        }
+        return sb.toString();
+    }
+}