1 /* 2 * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved. 3 * Copyright (c) 2017 SAP SE. All rights reserved. 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 5 * 6 * This code is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License version 2 only, as 8 * published by the Free Software Foundation. 9 * 10 * This code is distributed in the hope that it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 * version 2 for more details (a copy is included in the LICENSE file that 14 * accompanied this code). 15 * 16 * You should have received a copy of the GNU General Public License version 17 * 2 along with this work; if not, write to the Free Software Foundation, 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 * 20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21 * or visit www.oracle.com if you need additional information or have any 22 * questions. 23 */ 24 25 /** 26 * @test 27 * @bug 8176518 28 * @summary Invalid ImplicitNullChecks when heap base not protected 29 * 30 * @run main/othervm -XX:ObjectAlignmentInBytes=16 -XX:HeapBaseMinAddress=64g 31 * -XX:-TieredCompilation -Xbatch 32 * compiler.c2.TestNPEHeapBased 33 * @requires vm.bits == "64" 34 */ 35 36 package compiler.c2; 37 public class TestNPEHeapBased { 38 39 TestNPEHeapBased instance = null; 40 int i = 0; 41 set_i(int value)42 public void set_i(int value) { 43 instance.i = value; 44 } 45 46 47 static final int loop_cnt = 200000; 48 main(String args[])49 public static void main(String args[]){ 50 TestNPEHeapBased xyz = new TestNPEHeapBased(); 51 xyz.instance = xyz; 52 for (int x = 0; x < loop_cnt; x++) xyz.set_i(x); 53 xyz.instance = null; 54 try { 55 xyz.set_i(0); 56 } catch (NullPointerException npe) { 57 System.out.println("Got expected NullPointerException:"); 58 npe.printStackTrace(); 59 return; 60 } 61 throw new InternalError("NullPointerException is missing!"); 62 } 63 64 } 65