--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/testlibrary/jvmti/TransformUtil.java	Sun Sep 18 21:10:48 2016 -0400
@@ -0,0 +1,75 @@
+/*
+ * Copyright (c) 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.
+ */
+
+
+public class TransformUtil {
+    public static final String BeforePattern = "this-should-be-transformed";
+    public static final String AfterPattern  = "this-has-been--transformed";
+    public static final String ParentCheckPattern = "parent-transform-check: ";
+    public static final String ChildCheckPattern = "child-transform-check: ";
+
+    /**
+     * @return the number of occurrences of the <code>from</code> string that
+     * have been replaced.
+     */
+    public static int replace(byte buff[], String from, String to) {
+        if (to.length() != from.length()) {
+            throw new RuntimeException("bad strings");
+        }
+        byte f[] = asciibytes(from);
+        byte t[] = asciibytes(to);
+        byte f0 = f[0];
+
+        int numReplaced = 0;
+        int max = buff.length - f.length;
+        for (int i = 0; i < max; ) {
+            if (buff[i] == f0 && replace(buff, f, t, i)) {
+                i += f.length;
+                numReplaced++;
+            } else {
+                i++;
+            }
+        }
+        return numReplaced;
+    }
+
+    public static boolean replace(byte buff[], byte f[], byte t[], int i) {
+        for (int x = 0; x < f.length; x++) {
+            if (buff[x+i] != f[x]) {
+                return false;
+            }
+        }
+        for (int x = 0; x < f.length; x++) {
+            buff[x+i] = t[x];
+        }
+        return true;
+    }
+
+    static byte[] asciibytes(String s) {
+        byte b[] = new byte[s.length()];
+        for (int i = 0; i < b.length; i++) {
+            b[i] = (byte)s.charAt(i);
+        }
+        return b;
+    }
+}