| /* |
| * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| /** |
| * @test |
| * @bug 6478991 |
| * @summary C1 NullCheckEliminator yields incorrect exceptions |
| * |
| * @run main/othervm -XX:CompileOnly=NullCheckTest.test,NullCheckTest.inlined -Xcomp NullCheckTest |
| */ |
| |
| public class NullCheckTest { |
| static class A { |
| int f; |
| |
| public final void inlined(A a) { |
| // This cast is intended to fail. |
| B b = ((B) a); |
| } |
| } |
| |
| static class B extends A { |
| } |
| |
| |
| private static void test(A a1, A a2) { |
| // Inlined call must do a null check on a1. |
| // However, the exlipcit NullCheck instruction is eliminated and |
| // the null check is folded into the field load below, so the |
| // exception in the inlined method is thrown before the null check |
| // and the NullPointerException is not thrown. |
| a1.inlined(a2); |
| |
| int x = a1.f; |
| } |
| |
| public static void main(String[] args) { |
| // load classes |
| new B(); |
| try { |
| test(null, new A()); |
| |
| throw new InternalError("FAILURE: no exception"); |
| } catch (NullPointerException ex) { |
| System.out.println("CORRECT: NullPointerException"); |
| } catch (ClassCastException ex) { |
| System.out.println("FAILURE: ClassCastException"); |
| throw ex; |
| } |
| } |
| } |