68 lines
2.3 KiB
Java
68 lines
2.3 KiB
Java
/*
|
|
* Copyright (c) 2015, 2023, Oracle and/or its affiliates. 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 TestStableMemoryBarrier
|
|
* @bug 8139758
|
|
* @summary tests memory barrier correctly inserted for stable fields
|
|
* @modules java.base/jdk.internal.vm.annotation
|
|
*
|
|
* @run main/bootclasspath/othervm -Xcomp -XX:CompileOnly=*NotDominate::testCompile
|
|
* compiler.stable.TestStableMemoryBarrier
|
|
*
|
|
* @author hui.shi@linaro.org
|
|
*/
|
|
|
|
package compiler.stable;
|
|
|
|
import jdk.internal.vm.annotation.Stable;
|
|
|
|
public class TestStableMemoryBarrier {
|
|
public static void main(String[] args) throws Exception {
|
|
for (int i = 0; i < 1000000; i++) {
|
|
NotDominate.testCompile(i);
|
|
}
|
|
}
|
|
/* ====================================================
|
|
* Stable field initialized in method, but its allocation
|
|
* doesn't dominate MemBar Release at the end of method.
|
|
*/
|
|
private static class NotDominate {
|
|
public @Stable int v;
|
|
public static int[] array = new int[100];
|
|
|
|
public static NotDominate testCompile(int n) {
|
|
if ((n % 2) == 0) return null;
|
|
// add a loop here, trigger PhaseIdealLoop::verify_dominance
|
|
for (int i = 0; i < 100; i++) {
|
|
array[i] = n;
|
|
}
|
|
NotDominate nm = new NotDominate();
|
|
nm.v = n;
|
|
return nm;
|
|
}
|
|
|
|
|
|
}
|
|
}
|