jdk8-mips64-public/hotspot: test/compiler/6478991/NullCheckTest.java@5201379fe487

     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  */

    25 /**

    26  * @test

    27  * @bug 6478991

    28  * @summary C1 NullCheckEliminator yields incorrect exceptions

    29  *

    30  * @run main/othervm -XX:CompileOnly=NullCheckTest.test,NullCheckTest.inlined  -Xcomp NullCheckTest

    31  */

    33 public class NullCheckTest {

    34         static class A {

    35                 int f;

    37                 public final void inlined(A a) {

    38                         // This cast is intended to fail.

    39                         B b = ((B) a);

    40                 }

    41         }

    43         static class B extends A {

    44         }

    47         private static void test(A a1, A a2) {

    48                 // Inlined call must do a null check on a1.

    49                 // However, the exlipcit NullCheck instruction is eliminated and

    50                 // the null check is folded into the field load below, so the

    51                 // exception in the inlined method is thrown before the null check

    52                 // and the NullPointerException is not thrown.

    53                 a1.inlined(a2);

    55                 int x = a1.f;

    56         }

    58         public static void main(String[] args) {

    59                 // load classes

    60                 new B();

    61                 try {

    62                         test(null, new A());

    64                         throw new InternalError("FAILURE: no exception");

    65                 } catch (NullPointerException ex) {

    66                         System.out.println("CORRECT: NullPointerException");

    67                 } catch (ClassCastException ex) {

    68                         System.out.println("FAILURE: ClassCastException");

    69                         throw ex;

    70                 }

    71         }

    72 }

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