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/* |
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* Copyright (c) 2004, 2020, Oracle and/or its affiliates. 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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/* |
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* @test |
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* @bug 4992443 4994819 |
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* @modules java.base/java.util.concurrent.atomic:open |
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* @run main VMSupportsCS8 |
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* @summary Checks that the value of VMSupportsCS8 matches system properties. |
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*/ |
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|
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import java.lang.reflect.Field; |
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|
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public class VMSupportsCS8 { |
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public static void main(String[] args) throws Exception { |
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String isalist = System.getProperty("sun.cpu.isalist"); |
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if (isalist != null && isalist.matches |
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(".*\\b(pentium_pro|ia64|amd64).*") |
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|| |
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System.getProperty("os.arch").matches |
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(".*\\b(ia64|amd64).*")) { |
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|
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System.out.println("This system is known to have hardware CS8"); |
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|
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Class klass = Class.forName("java.util.concurrent.atomic.AtomicLong"); |
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Field field = klass.getDeclaredField("VM_SUPPORTS_LONG_CAS"); |
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field.setAccessible(true); |
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boolean VMSupportsCS8 = field.getBoolean(null); |
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if (! VMSupportsCS8) |
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throw new Exception("Unexpected value for VMSupportsCS8"); |
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} |
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} |
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} |
