70 lines
2.2 KiB
Java
70 lines
2.2 KiB
Java
/*
|
|
* Copyright (c) 2020, 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 8252292
|
|
* @summary 8240795 may cause anti-dependency to be missed
|
|
* @requires vm.gc.Parallel
|
|
*
|
|
* @run main/othervm -XX:-BackgroundCompilation -XX:+UseParallelGC TestMissingAntiDependency
|
|
*
|
|
*/
|
|
|
|
public class TestMissingAntiDependency {
|
|
public static void main(String[] args) {
|
|
int[] src = new int[10];
|
|
for (int i = 0; i < 20_000; i++) {
|
|
test(src, true, true, 10);
|
|
test(src, true, false, 10);
|
|
test(src, false, false, 10);
|
|
}
|
|
src[9] = 42;
|
|
final int v = test(src, true, true, 1);
|
|
if (v != 42) {
|
|
throw new RuntimeException("Incorrect return value " + v);
|
|
}
|
|
}
|
|
|
|
private static int test(int[] src, boolean flag1, boolean flag2, int stop) {
|
|
int v = 0;
|
|
int j = 1;
|
|
for (; j < 10; j++) {
|
|
for (int i = 0; i < 2; i++) {
|
|
|
|
}
|
|
}
|
|
int[] dst = new int[10];
|
|
for (int i = 0; i < stop; i ++) {
|
|
if (flag1) {
|
|
System.arraycopy(src, 0, dst, 0, j);
|
|
v = dst[9];
|
|
if (flag2) {
|
|
src[9] = 0x42;
|
|
}
|
|
}
|
|
}
|
|
return v;
|
|
}
|
|
}
|