diff -r 4ebc2e2fb97c -r 71c04702a3d5 test/hotspot/jtreg/compiler/c2/TestNPEHeapBased.java --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/test/hotspot/jtreg/compiler/c2/TestNPEHeapBased.java Tue Sep 12 19:03:39 2017 +0200 @@ -0,0 +1,64 @@ +/* + * 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!"); + } + +}