--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/jtreg/vmTestbase/vm/share/FileUtils.java	Mon Apr 30 18:10:24 2018 -0700
@@ -0,0 +1,81 @@
+/*
+ * 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.
+ *
+ * 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 vm.share;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.Arrays;
+
+
+public class FileUtils {
+
+    private static ClassLoader cl = ClassLoader.getSystemClassLoader();
+
+    public static byte[] readFile(File f) throws IOException {
+        FileInputStream is = new FileInputStream(f);
+        try {
+            return readStream(is);
+        } finally {
+            is.close();
+        }
+    }
+
+    public static byte[] readClass(String name) throws IOException {
+        return readResource(name.replace('.', '/') + ".class");
+    }
+
+    public static byte[] readResource(String name) throws IOException {
+        InputStream is = FileUtils.cl.getResourceAsStream(name);
+        if (is == null)
+            throw new IOException("Can't read resource " + name);
+
+        try {
+            return readStream(is);
+        } finally {
+            is.close();
+        }
+    }
+
+    public static byte[] readStream(InputStream is) throws IOException {
+        byte buf[] = new byte[0xFFFF];
+        int offset = 0;
+        int r;
+        while ((r = is.read(buf, offset, buf.length - offset)) > 0)
+            offset += r;
+        return Arrays.copyOf(buf, offset);
+    }
+
+    public static void writeBytesToFile(File file, byte[] buf)
+            throws IOException {
+        FileOutputStream fos = new FileOutputStream(file);
+        try {
+            fos.write(buf);
+        } finally {
+            fos.close();
+        }
+    }
+
+}