1 /*
   2  * Copyright (c) 2009, 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 /**
  25  * @test
  26  * @bug 6539464
  27  * @summary Math.log() produces inconsistent results between successive runs.
  28  *
  29  * @run main/othervm -Xcomp -XX:CompileOnly=Test.main Test
  30  */
  31 
  32 public class Test {
  33     static double log_value = 17197;
  34     static double log_result = Math.log(log_value);
  35 
  36     public static void main(String[] args) throws Exception {
  37         for (int i = 0; i < 1000000; i++) {
  38             double log_result2 = Math.log(log_value);
  39             if (log_result2 != log_result) {
  40                 throw new InternalError("Math.log produces inconsistent results: " + log_result2 + " != " + log_result);
  41             }
  42         }
  43     }
  44 }