--- /dev/null	2017-11-09 09:38:01.297999907 +0100
+++ new/src/jdk.jfr/share/classes/jdk/jfr/internal/dcmd/DCmdDump.java	2018-04-09 16:12:12.950970759 +0200
@@ -0,0 +1,80 @@
+/*
+ * Copyright (c) 2012, 2018, 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.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * 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.
+ */
+package jdk.jfr.internal.dcmd;
+
+import java.io.IOException;
+import java.nio.file.InvalidPathException;
+import java.util.HashMap;
+import java.util.Map;
+
+import jdk.jfr.Recording;
+import jdk.jfr.internal.PlatformRecording;
+import jdk.jfr.internal.PrivateAccess;
+import jdk.jfr.internal.SecuritySupport.SafePath;
+import jdk.jfr.internal.Utils;
+import jdk.jfr.internal.WriteableUserPath;
+
+/**
+ * JFR.dump
+ *
+ */
+//Instantiated by native
+final class DCmdDump extends AbstractDCmd {
+    /**
+     * Execute JFR.dump.
+     *
+     * @param recordingText name or id of the recording to dump, or
+     *        <code>null</code>
+     *
+     * @param textPath file path where recording should be written.
+     *
+     * @return result output
+     *
+     * @throws DCmdException if the dump could not be completed
+     */
+    public String execute(String recordingText, String textPath,  Boolean pathToGcRoots) throws DCmdException {
+        if (textPath == null) {
+            throw new DCmdException("Failed to dump %s, missing filename.", recordingText);
+        }
+        Recording recording = findRecording(recordingText);
+        try {
+            SafePath dumpFile = resolvePath(textPath, "Failed to dump %s");
+            // create file for JVM
+            Utils.touch(dumpFile.toPath());
+            PlatformRecording r = PrivateAccess.getInstance().getPlatformRecording(recording);
+            WriteableUserPath wup = new WriteableUserPath(dumpFile.toPath());
+
+            Map<String, String> overlay = new HashMap<>();
+            Utils.updateSettingPathToGcRoots(overlay, pathToGcRoots);
+
+            r.copyTo(wup, "Dumped by user", overlay);
+            reportOperationComplete("Dumped", recording, dumpFile);
+        } catch (IOException | InvalidPathException e) {
+            throw new DCmdException("Failed to dump %s. Could not copy recording for dump. %s", recordingText, e.getMessage());
+        }
+        return getResult();
+    }
+
+}