65 lines
2.1 KiB
Java
65 lines
2.1 KiB
Java
/*
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* Copyright (c) 2016, 2018, Red Hat, Inc. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/**
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* @test TestNullCheck
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* @summary implicit null check on brooks pointer must not cause crash
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* @key gc
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* @requires vm.gc.Shenandoah & !vm.graal.enabled & (vm.bits == "64")
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* @run main/othervm -XX:-BackgroundCompilation -XX:-UseOnStackReplacement -XX:-TieredCompilation
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* -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC
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* -Xmx4G -XX:HeapBaseMinAddress=0x800000000 TestNullCheck
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*/
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// HeapBaseMinAddress above forces compressed oops with a base
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public class TestNullCheck {
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int f;
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static int test1(TestNullCheck o) {
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return o.f;
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}
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static TestNullCheck static_obj = new TestNullCheck();
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static int test2() {
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return static_obj.f;
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}
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static public void main(String[] args) {
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TestNullCheck o = new TestNullCheck();
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for (int i = 0; i < 20000; i++) {
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test1(o);
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test2();
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}
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try {
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test1(null);
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} catch (NullPointerException npe) {}
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static_obj = null;
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try {
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test2();
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} catch (NullPointerException npe) {}
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}
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}
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