--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/java/math/BigInteger/ModPowPowersof2.java	Mon Jan 26 19:49:26 2009 -0800
@@ -0,0 +1,85 @@
+/*
+ * Copyright 1998 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+/* @test
+   @bug 4098742
+   @summary Test biginteger modpow method
+   @author Michael McCloskey
+   @run main/othervm ModPowPowersof2
+*/
+
+import java.math.BigInteger;
+import java.io.BufferedReader;
+import java.io.InputStreamReader;
+import java.io.File;
+import java.io.IOException;
+
+/**
+ * This class tests to see if using modPow on a power
+ * of two crashes the vm
+ *
+ */
+public class ModPowPowersof2 {
+
+      public static void main(String args[]) throws Exception {
+          // Construct a command that runs the test in other vm
+          String[] command = new String[4];
+          int n = 0;
+
+          command[n++] = System.getProperty("java.home") + File.separator +
+              "bin" + File.separator + "java";
+          if (System.getProperty("java.class.path") != null) {
+              command[n++] = "-classpath";
+              command[n++] = System.getProperty("java.class.path");
+          }
+
+          command[n++] = "ModPowPowersof2$ModTester";
+
+          // Exec another vm to run test in
+          Process p = null;
+          p = Runtime.getRuntime().exec(command);
+
+          // Read the result to determine if test failed
+          BufferedReader in = new BufferedReader(new InputStreamReader(
+                                             p.getInputStream()));
+          String s;
+          s = in.readLine();
+          if (s == null)
+              throw new RuntimeException("ModPow causes vm crash");
+
+     }
+
+    public static class ModTester {
+        public static void main(String [] args) {
+            BigInteger two = BigInteger.valueOf(2);
+            BigInteger four = BigInteger.valueOf(4);
+
+            two.modPow(two, BigInteger.valueOf(4));
+            two.modPow(two, BigInteger.valueOf(8));
+            two.modPow(four, BigInteger.valueOf(8));
+
+            System.out.println("success");
+        }
+    }
+
+}