1 /*
2  * Copyright (c) 1998, Oracle and/or its affiliates. All rights reserved.
3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4  *
5  * This code is free software; you can redistribute it and/or modify it
6  * under the terms of the GNU General Public License version 2 only, as
7  * published by the Free Software Foundation.
8  *
9  * This code is distributed in the hope that it will be useful, but WITHOUT
10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12  * version 2 for more details (a copy is included in the LICENSE file that
13  * accompanied this code).
14  *
15  * You should have received a copy of the GNU General Public License version
16  * 2 along with this work; if not, write to the Free Software Foundation,
17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18  *
19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20  * or visit www.oracle.com if you need additional information or have any
21  * questions.
22  */
23 
24 /* @test
25    @bug 4098742
26    @summary Test biginteger modpow method
27    @author Michael McCloskey
28    @run main/othervm ModPowPowersof2
29 */
30 
31 package test.java.math.BigInteger;
32 
33 import java.math.BigInteger;
34 import java.io.BufferedReader;
35 import java.io.InputStreamReader;
36 import java.io.File;
37 import java.io.IOException;
38 
39 /**
40  * This class tests to see if using modPow on a power
41  * of two crashes the vm
42  *
43  */
44 public class ModPowPowersof2 {
45 
main(String args[])46       public static void main(String args[]) throws Exception {
47           // BEGIN Android-removed: Test fails on Android.
48           // java.io.IOException: Cannot run program "<path-to-art>/bin/java": error=2, No such file or directory
49           /*
50           // Construct a command that runs the test in other vm
51           String[] command = new String[4];
52           int n = 0;
53 
54           command[n++] = System.getProperty("java.home") + File.separator +
55               "bin" + File.separator + "java";
56           if (System.getProperty("java.class.path") != null) {
57               command[n++] = "-classpath";
58               command[n++] = System.getProperty("java.class.path");
59           }
60 
61           command[n++] = "ModPowPowersof2$ModTester";
62 
63           // Exec another vm to run test in
64           Process p = null;
65           p = Runtime.getRuntime().exec(command);
66 
67           // Read the result to determine if test failed
68           BufferedReader in = new BufferedReader(new InputStreamReader(
69                                              p.getInputStream()));
70           String s;
71           s = in.readLine();
72           if (s == null)
73               throw new RuntimeException("ModPow causes vm crash");
74           */
75           // Android-removed Test fails on Android.
76      }
77 
78     // BEGIN Android-removed: Test fails on Android.
79     // java.io.IOException: Cannot run program "<path-to-art>/bin/java": error=2, No such file or directory
80     /*
81     public static class ModTester {
82         public static void main(String [] args) {
83             BigInteger two = BigInteger.valueOf(2);
84             BigInteger four = BigInteger.valueOf(4);
85 
86             two.modPow(two, BigInteger.valueOf(4));
87             two.modPow(two, BigInteger.valueOf(8));
88             two.modPow(four, BigInteger.valueOf(8));
89 
90             System.out.println("success");
91         }
92     }
93     */
94     // Android-removed Test fails on Android.
95 
96 }
97