--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/jdk.jfr/share/classes/jdk/jfr/internal/instrument/RandomAccessFileInstrumentor.java	Tue May 15 20:24:34 2018 +0200
@@ -0,0 +1,173 @@
+/*
+ * Copyright (c) 2013, 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.instrument;
+
+import java.io.IOException;
+
+import jdk.jfr.events.FileReadEvent;
+import jdk.jfr.events.FileWriteEvent;
+
+/**
+ * See {@link JITracer} for an explanation of this code.
+ */
+@JIInstrumentationTarget("java.io.RandomAccessFile")
+final class RandomAccessFileInstrumentor {
+
+    private RandomAccessFileInstrumentor() {
+    }
+
+    private String path;
+
+    @SuppressWarnings("deprecation")
+    @JIInstrumentationMethod
+    public int read() throws IOException {
+        FileReadEvent event = FileReadEvent.EVENT.get();
+        if (!event.isEnabled()) {
+            return read();
+        }
+        int result = 0;
+        try {
+            event.begin();
+            result = read();
+            if (result < 0) {
+                event.endOfFile = true;
+            } else {
+                event.bytesRead = 1;
+            }
+        } finally {
+            event.path = path;
+            event.commit();
+            event.reset();
+        }
+        return result;
+    }
+
+    @SuppressWarnings("deprecation")
+    @JIInstrumentationMethod
+    public int read(byte b[]) throws IOException {
+        FileReadEvent event = FileReadEvent.EVENT.get();
+        if (!event.isEnabled()) {
+            return read(b);
+        }
+        int bytesRead = 0;
+        try {
+            event.begin();
+            bytesRead = read(b);
+        } finally {
+            if (bytesRead < 0) {
+                event.endOfFile = true;
+            } else {
+                event.bytesRead = bytesRead;
+            }
+            event.path = path;
+            event.commit();
+            event.reset();
+        }
+        return bytesRead;
+    }
+
+    @SuppressWarnings("deprecation")
+    @JIInstrumentationMethod
+    public int read(byte b[], int off, int len) throws IOException {
+        FileReadEvent event = FileReadEvent.EVENT.get();
+        if (!event.isEnabled()) {
+            return read(b, off, len);
+        }
+        int bytesRead = 0;
+        try {
+            event.begin();
+            bytesRead = read(b, off, len);
+        } finally {
+            if (bytesRead < 0) {
+                event.endOfFile = true;
+            } else {
+                event.bytesRead = bytesRead;
+            }
+            event.path = path;
+            event.commit();
+            event.reset();
+        }
+        return bytesRead;
+    }
+
+    @SuppressWarnings("deprecation")
+    @JIInstrumentationMethod
+    public void write(int b) throws IOException {
+        FileWriteEvent event = FileWriteEvent.EVENT.get();
+        if (!event.isEnabled()) {
+            write(b);
+            return;
+        }
+        try {
+            event.begin();
+            write(b);
+            event.bytesWritten = 1;
+        } finally {
+            event.path = path;
+            event.commit();
+            event.reset();
+        }
+    }
+
+    @SuppressWarnings("deprecation")
+    @JIInstrumentationMethod
+    public void write(byte b[]) throws IOException {
+        FileWriteEvent event = FileWriteEvent.EVENT.get();
+        if (!event.isEnabled()) {
+            write(b);
+            return;
+        }
+        try {
+            event.begin();
+            write(b);
+            event.bytesWritten = b.length;
+        } finally {
+            event.path = path;
+            event.commit();
+            event.reset();
+        }
+    }
+
+    @SuppressWarnings("deprecation")
+    @JIInstrumentationMethod
+    public void write(byte b[], int off, int len) throws IOException {
+        FileWriteEvent event = FileWriteEvent.EVENT.get();
+        if (!event.isEnabled()) {
+            write(b, off, len);
+            return;
+        }
+        try {
+            event.begin();
+            write(b, off, len);
+            event.bytesWritten = len;
+        } finally {
+            event.path = path;
+            event.commit();
+            event.reset();
+        }
+    }
+
+}