1 /*
   2  * Copyright (c) 2011, 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 /**
  26  * @test
  27  * @bug 7041100
  28  * @summary The load in String.equals intrinsic executed before null check
  29  *
  30  * @run main/othervm -Xbatch Test7041100 abc def
  31  */
  32 
  33 public class Test7041100 {
  34 
  35     static String n = null;
  36     public static void main(String[] args) throws Exception {
  37         for (int i = 0; i < 10000; i++) {
  38             stringEQ(args[0], args[1]);
  39             stringEQ(args[0], args[0]);
  40             stringEQ(args[0], n);
  41             stringEQ(n, args[0]);
  42         }
  43     }
  44 
  45     public static boolean stringEQ(String a, String b) {
  46         if (a == b)
  47             return true;
  48         if (a == null || b == null)
  49             return false;
  50         else
  51             return a.equals(b);
  52     }
  53 }