1 /*
   2  * Copyright (c) 2014, 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 8055910
  27  * @summary Arrays.copyOf doesn't perform subtype check
  28  *
  29  * @run main/othervm -XX:-BackgroundCompilation -XX:-UseOnStackReplacement
  30  *                   compiler.arraycopy.TestArraysCopyOfNoTypeCheck
  31  */
  32 
  33 package compiler.arraycopy;
  34 
  35 import java.util.Arrays;
  36 
  37 public class TestArraysCopyOfNoTypeCheck {
  38 
  39     static class A {
  40     }
  41 
  42     static class B extends A {
  43     }
  44 
  45     static B[] test(A[] arr) {
  46         return Arrays.copyOf(arr, 10, B[].class);
  47     }
  48 
  49     static public void main(String[] args) {
  50         A[] arr = new A[20];
  51         for (int i = 0; i < 20000; i++) {
  52             test(arr);
  53         }
  54         A[] arr2 = new A[20];
  55         arr2[0] = new A();
  56         boolean exception = false;
  57         try {
  58             test(arr2);
  59         } catch (ArrayStoreException ase) {
  60             exception = true;
  61         }
  62         if (!exception) {
  63             throw new RuntimeException("TEST FAILED: ArrayStoreException not thrown");
  64         }
  65     }
  66 }