Mercurial > hg > truffle
comparison test/compiler/6478991/NullCheckTest.java @ 3792:15559220ce79
6478991: C1 NullCheckEliminator yields incorrect exceptions
Reviewed-by: twisti, iveresov
author | never |
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date | Tue, 05 Jul 2011 16:07:54 -0700 |
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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 6478991 | |
28 * @summary C1 NullCheckEliminator yields incorrect exceptions | |
29 * | |
30 * @run main/othervm -XX:CompileOnly=NullCheckTest.test,NullCheckTest.inlined -Xcomp NullCheckTest | |
31 */ | |
32 | |
33 public class NullCheckTest { | |
34 static class A { | |
35 int f; | |
36 | |
37 public final void inlined(A a) { | |
38 // This cast is intended to fail. | |
39 B b = ((B) a); | |
40 } | |
41 } | |
42 | |
43 static class B extends A { | |
44 } | |
45 | |
46 | |
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); | |
54 | |
55 int x = a1.f; | |
56 } | |
57 | |
58 public static void main(String[] args) { | |
59 // load classes | |
60 new B(); | |
61 try { | |
62 test(null, new A()); | |
63 | |
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 } |