--- /dev/null	2018-06-17 23:18:20.806999507 +0800
+++ new/src/share/classes/jdk/jfr/internal/cmd/XMLWriter.java	2019-01-29 10:59:54.419123633 +0800
@@ -0,0 +1,191 @@
+/*
+ * Copyright (c) 2016, 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.  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.cmd;
+
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.nio.file.Path;
+
+import jdk.jfr.EventType;
+import jdk.jfr.ValueDescriptor;
+import jdk.jfr.consumer.RecordedEvent;
+import jdk.jfr.consumer.RecordedObject;
+import jdk.jfr.consumer.RecordingFile;
+
+final class XMLWriter extends StructuredWriter {
+
+    public XMLWriter(PrintWriter destination) {
+        super(destination);
+    }
+
+    public void print(Path source) throws IOException {
+        try (RecordingFile es = new RecordingFile(source)) {
+            println("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
+            println("<recording>");
+            indent();
+            printIndent();
+            println("<events>");
+            indent();
+            while (es.hasMoreEvents()) {
+                printEvent(es.readEvent());
+                flush();
+            }
+            retract();
+            printIndent();
+            println("</events>");
+            retract();
+            println("</recording>");
+            flush();
+        }
+    }
+
+    private void printEvent(RecordedEvent e) throws IOException {
+        EventType type = e.getEventType();
+        printIndent();
+        print("<event");
+        printAttribute("typeId", String.valueOf(type.getId()));
+        printAttribute("name", type.getName());
+        printAttribute("startTime",e.getStartTime().toString());
+        printAttribute("duration", e.getDuration().toString());
+        print(">");
+        printObject(e);
+        printIndent();
+        println("</event>");
+        println();
+    }
+
+    private void printAttribute(String name, String value) {
+        print(" ", name, "=\"", value, "\"");
+    }
+
+    public void printObject(RecordedObject struct) {
+        println();
+        indent();
+        for (ValueDescriptor v : struct.getFields()) {
+            printValueDescriptor(v, struct.getValue(v.getName()), -1);
+        }
+        retract();
+    }
+
+    private void printArray(ValueDescriptor v, Object[] array) {
+        println();
+        indent();
+        for (int index = 0; index < array.length; index++) {
+            printValueDescriptor(v, array[index], index);
+        }
+        retract();
+    }
+
+    private void printValueDescriptor(ValueDescriptor vd, Object value, int index) {
+        boolean arrayElement = index != -1;
+        String name = arrayElement ? null : vd.getName();
+        if (vd.isArray() && !arrayElement) {
+            if (printBeginElement("array", name, value, index)) {
+                printArray(vd, (Object[]) value);
+                printIndent();
+                printEndElement("array");
+            }
+            return;
+        }
+        if (!vd.getFields().isEmpty()) {
+            if (printBeginElement("struct", name, value, index)) {
+                printObject((RecordedObject) value);
+                printIndent();
+                printEndElement("struct");
+            }
+            return;
+        }
+        if (printBeginElement("value", name, value, index)) {
+            printEscaped(String.valueOf(value));
+            printEndElement("value");
+        }
+    }
+
+    private boolean printBeginElement(String elementName, String name, Object value, int index) {
+        printIndent();
+        print("<", elementName);
+        if (name != null) {
+            printAttribute("name", name);
+        }
+        if (index != -1) {
+            printAttribute("index", Integer.toString(index));
+        }
+        if (value == null) {
+            print("><null/></");
+            print(elementName);
+            println(">");
+            return false;
+        }
+        if (value.getClass().isArray()) {
+            Object[] array = (Object[]) value;
+            printAttribute("size", Integer.toString(array.length));
+        }
+        print(">");
+        return true;
+    }
+
+    private void printEndElement(String elementName) {
+        print("</");
+        print(elementName);
+        println(">");
+    }
+
+    private void printEscaped(String text) {
+        for (int i = 0; i < text.length(); i++) {
+            printEscaped(text.charAt(i));
+        }
+    }
+
+    private void printEscaped(char c) {
+        if (c == 34) {
+            print("&quot;");
+            return;
+        }
+        if (c == 38) {
+            print("&amp;");
+            return;
+        }
+        if (c == 39) {
+            print("&apos;");
+            return;
+        }
+        if (c == 60) {
+            print("&lt;");
+            return;
+        }
+        if (c == 62) {
+            print("&gt;");
+            return;
+        }
+        if (c > 0x7F) {
+            print("&#");
+            print((int) c);
+            print(';');
+            return;
+        }
+        print(c);
+    }
+}