1/* 2 * Copyright (c) 2014, 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 * @test 26 * @bug 8039043 27 * @summary Null check is placed in a wrong place when storing a null to an object field on x64 with compressed oops off 28 * 29 * @run main/othervm -Xbatch -XX:+IgnoreUnrecognizedVMOptions 30 * -XX:+TieredCompilation -XX:TieredStopAtLevel=1 -XX:-UseCompressedOops 31 * -XX:CompileCommand=compileonly,compiler.codegen.C1NullCheckOfNullStore::test 32 * compiler.codegen.C1NullCheckOfNullStore 33 */ 34 35package compiler.codegen; 36 37public class C1NullCheckOfNullStore { 38 private static class Foo { 39 Object bar; 40 } 41 42 static private void test(Foo x) { 43 x.bar = null; 44 } 45 46 static public void main(String args[]) { 47 Foo x = new Foo(); 48 for (int i = 0; i < 10000; i++) { 49 test(x); 50 } 51 boolean gotNPE = false; 52 try { 53 for (int i = 0; i < 10000; i++) { 54 test(null); 55 } 56 } catch (NullPointerException e) { 57 gotNPE = true; 58 } 59 if (!gotNPE) { 60 throw new Error("Expecting a NullPointerException"); 61 } 62 } 63} 64