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test/compiler/6478991/NullCheckTest.java@5dcfeb396fed (annotated)

test/compiler/6478991/NullCheckTest.java

Thu, 11 Apr 2013 09:39:57 -0700

author

katleman

date

Thu, 11 Apr 2013 09:39:57 -0700

changeset 4883

5dcfeb396fed

parent 0

f90c822e73f8

permissions

-rw-r--r--

Added tag jdk8-b85 for changeset 42fe530cd478

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
aoqi@0	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0	4	*
aoqi@0	5	* This code is free software; you can redistribute it and/or modify it
aoqi@0	6	* under the terms of the GNU General Public License version 2 only, as
aoqi@0	7	* published by the Free Software Foundation.
aoqi@0	8	*
aoqi@0	9	* This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0	12	* version 2 for more details (a copy is included in the LICENSE file that
aoqi@0	13	* accompanied this code).
aoqi@0	14	*
aoqi@0	15	* You should have received a copy of the GNU General Public License version
aoqi@0	16	* 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0	18	*
aoqi@0	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0	20	* or visit www.oracle.com if you need additional information or have any
aoqi@0	21	* questions.
aoqi@0	22	*
aoqi@0	23	*/
aoqi@0	24
aoqi@0	25	/**
aoqi@0	26	* @test
aoqi@0	27	* @bug 6478991
aoqi@0	28	* @summary C1 NullCheckEliminator yields incorrect exceptions
aoqi@0	29	*
aoqi@0	30	* @run main/othervm -XX:CompileOnly=NullCheckTest.test,NullCheckTest.inlined -Xcomp NullCheckTest
aoqi@0	31	*/
aoqi@0	32
aoqi@0	33	public class NullCheckTest {
aoqi@0	34	static class A {
aoqi@0	35	int f;
aoqi@0	36
aoqi@0	37	public final void inlined(A a) {
aoqi@0	38	// This cast is intended to fail.
aoqi@0	39	B b = ((B) a);
aoqi@0	40	}
aoqi@0	41	}
aoqi@0	42
aoqi@0	43	static class B extends A {
aoqi@0	44	}
aoqi@0	45
aoqi@0	46
aoqi@0	47	private static void test(A a1, A a2) {
aoqi@0	48	// Inlined call must do a null check on a1.
aoqi@0	49	// However, the exlipcit NullCheck instruction is eliminated and
aoqi@0	50	// the null check is folded into the field load below, so the
aoqi@0	51	// exception in the inlined method is thrown before the null check
aoqi@0	52	// and the NullPointerException is not thrown.
aoqi@0	53	a1.inlined(a2);
aoqi@0	54
aoqi@0	55	int x = a1.f;
aoqi@0	56	}
aoqi@0	57
aoqi@0	58	public static void main(String[] args) {
aoqi@0	59	// load classes
aoqi@0	60	new B();
aoqi@0	61	try {
aoqi@0	62	test(null, new A());
aoqi@0	63
aoqi@0	64	throw new InternalError("FAILURE: no exception");
aoqi@0	65	} catch (NullPointerException ex) {
aoqi@0	66	System.out.println("CORRECT: NullPointerException");
aoqi@0	67	} catch (ClassCastException ex) {
aoqi@0	68	System.out.println("FAILURE: ClassCastException");
aoqi@0	69	throw ex;
aoqi@0	70	}
aoqi@0	71	}
aoqi@0	72	}