77 lines
2.5 KiB
Java
77 lines
2.5 KiB
Java
/*
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* Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/**
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* @test
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* @bug 6478991
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* @summary C1 NullCheckEliminator yields incorrect exceptions
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*
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* @run main/othervm -Xcomp
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* -XX:CompileCommand=compileonly,compiler.c1.NullCheckTest::test
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* -XX:CompileCommand=compileonly,compiler.c1.NullCheckTest::inlined
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* compiler.c1.NullCheckTest
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*/
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package compiler.c1;
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public class NullCheckTest {
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static class A {
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int f;
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public final void inlined(A a) {
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// This cast is intended to fail.
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B b = ((B) a);
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}
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}
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static class B extends A {
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}
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private static void test(A a1, A a2) {
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// Inlined call must do a null check on a1.
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// However, the exlipcit NullCheck instruction is eliminated and
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// the null check is folded into the field load below, so the
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// exception in the inlined method is thrown before the null check
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// and the NullPointerException is not thrown.
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a1.inlined(a2);
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int x = a1.f;
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}
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public static void main(String[] args) {
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// load classes
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new B();
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try {
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test(null, new A());
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throw new InternalError("FAILURE: no exception");
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} catch (NullPointerException ex) {
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System.out.println("CORRECT: NullPointerException");
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} catch (ClassCastException ex) {
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System.out.println("FAILURE: ClassCastException");
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throw ex;
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}
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}
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}
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