| /* |
| * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved. |
| * Copyright (c) 2017 SAP SE. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /** |
| * @test |
| * @bug 8176518 |
| * @summary Invalid ImplicitNullChecks when heap base not protected |
| * |
| * @run main/othervm -XX:ObjectAlignmentInBytes=16 -XX:HeapBaseMinAddress=64g |
| * -XX:-TieredCompilation -Xbatch |
| * compiler.c2.TestNPEHeapBased |
| * @requires vm.bits == "64" |
| */ |
| |
| package compiler.c2; |
| public class TestNPEHeapBased { |
| |
| TestNPEHeapBased instance = null; |
| int i = 0; |
| |
| public void set_i(int value) { |
| instance.i = value; |
| } |
| |
| |
| static final int loop_cnt = 200000; |
| |
| public static void main(String args[]){ |
| TestNPEHeapBased xyz = new TestNPEHeapBased(); |
| xyz.instance = xyz; |
| for (int x = 0; x < loop_cnt; x++) xyz.set_i(x); |
| xyz.instance = null; |
| try { |
| xyz.set_i(0); |
| } catch (NullPointerException npe) { |
| System.out.println("Got expected NullPointerException:"); |
| npe.printStackTrace(); |
| return; |
| } |
| throw new InternalError("NullPointerException is missing!"); |
| } |
| |
| } |