1 /*
   2  * Copyright (c) 2010, 2018, 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 7009359
  27  * @summary HS optimizes new StringBuffer(null) so it does not throw NPE as expected
  28  *
  29  * @run main/othervm -Xbatch -XX:+IgnoreUnrecognizedVMOptions -XX:+OptimizeStringConcat
  30  *                   -XX:CompileCommand=dontinline,compiler.c2.Test7009359::stringmakerBUG
  31  *                   compiler.c2.Test7009359
  32  */
  33 
  34 package compiler.c2;
  35 
  36 public class Test7009359 {
  37     public static void main (String[] args) {
  38         for(int i = 0; i < 100000; i++) {
  39             if(!stringmakerBUG(null).equals("NPE")) {
  40                 System.out.println("StringBuffer(null) does not throw NPE");
  41                 System.exit(97);
  42             }
  43         }
  44     }
  45 
  46     public static String stringmakerBUG(String str) {
  47        try {
  48            return new StringBuffer(str).toString();
  49        } catch (NullPointerException e) {
  50            return "NPE";
  51        }
  52     }
  53 }
  54