61 lines
1.9 KiB
Java
61 lines
1.9 KiB
Java
/*
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* Copyright (c) 2017, 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
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* @bug 8173147
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* @summary Loads generated at uncommon trap from eliminated arraycopy have incorrect memory state
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* @run main/othervm -XX:CompileOnly=TestArrayCopyUNCBadMem::test -Xcomp TestArrayCopyUNCBadMem
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*
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*/
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public class TestArrayCopyUNCBadMem {
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volatile static int field;
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static class unloaded {
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static int dummy;
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}
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static int test(int[] input) {
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int[] alloc = new int[10];
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System.arraycopy(input, 0, alloc, 0, 10);
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// membars to have anti-dependence edges and make scheduling
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// fail
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field = 0x42;
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// uncommon trap
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unloaded.dummy = 0x42;
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return alloc[0] + alloc[1];
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}
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public static void main(String[] args) {
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int[] array = new int[10];
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System.arraycopy(array, 0, array, 0, 0); // load System class
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test(array);
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}
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}
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