jdk-24/test/hotspot/jtreg/gc/epsilon/TestEpsilonEnabled.java
2021-08-24 10:08:18 +00:00

56 lines
1.9 KiB
Java

/*
* Copyright (c) 2017, 2018, 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.
*/
package gc.epsilon;
/**
* @test TestAlwaysPretouch
* @requires vm.gc.Epsilon
* @summary Basic sanity test for Epsilon
* @library /test/lib
*
* @run main/othervm -Xmx256m
* -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC
* gc.epsilon.TestEpsilonEnabled
*/
import java.lang.management.GarbageCollectorMXBean;
import java.lang.management.ManagementFactory;
public class TestEpsilonEnabled {
public static void main(String[] args) throws Exception {
if (!isEpsilonEnabled()) {
throw new IllegalStateException("Debug builds should have Epsilon enabled");
}
}
public static boolean isEpsilonEnabled() {
for (GarbageCollectorMXBean bean : ManagementFactory.getGarbageCollectorMXBeans()) {
if (bean.getName().contains("Epsilon")) {
return true;
}
}
return false;
}
}