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/*
* Copyright (c) 2025, Red Hat, Inc. 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 8356989
* @summary Unexpected null in C2 compiled code
* @run main/othervm -XX:-BackgroundCompilation TestArrayCopySameSrcDstInitializesNonEscapingArray
* @run main TestArrayCopySameSrcDstInitializesNonEscapingArray
*/
public class TestArrayCopySameSrcDstInitializesNonEscapingArray {
private static volatile int volatileField;
public static void main(String[] args) {
Object obj = new Object();
for (int i = 0; i < 20_000; i++) {
test1(obj);
}
}
private static void test1(Object obj) {
A a = new A();
Object[] array = new Object[2];
array[0] = obj;
a.field = array;
System.arraycopy(array, 0, array, 1, 1);
if (a.field[1] == null) {
throw new RuntimeException("Can't be null");
}
}
private static class A {
Object[] field;
public A() {
field = null;
}
}
}
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