1 /* 2 * Copyright (c) 2015, 2018, 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 8074306 8073432 8074501 27 * @summary NULLCHK is emitted as Object.getClass 28 * @compile -source 7 -target 7 TestSyntheticNullChecks.java 29 * @run main TestSyntheticNullChecks 7 30 * @clean TestSyntheticNullChecks* 31 * @compile TestSyntheticNullChecks.java 32 * @run main TestSyntheticNullChecks 9 33 */ 34 public class TestSyntheticNullChecks { 35 36 class Inner { } 37 38 static void generateSyntheticNPE(TestSyntheticNullChecks outer) { 39 outer.new Inner(); //javac will generate a synthetic NPE check for 'outer' 40 } 41 42 public static void main(String[] args) { 43 int version = Integer.valueOf(args[0]); 44 boolean useObjects = version >= 7; 45 try { 46 generateSyntheticNPE(null); 47 } catch (NullPointerException npe) { 48 boolean hasRequireNotNull = false; 49 for (StackTraceElement e : npe.getStackTrace()) { 50 if (e.getClassName().equals("java.util.Objects") && 51 e.getMethodName().equals("requireNonNull")) { 52 hasRequireNotNull = true; 53 break; 54 } 55 } 56 if (hasRequireNotNull != useObjects) { 57 throw new AssertionError(); 58 } 59 } 60 } 61 }