Mercurial > hg > graal-jvmci-8
view test/runtime/memory/ReadVMPageSize.java @ 22975:cc5c3ef1f03a
8053995: Add method to WhiteBox to get vm pagesize.
Summary: Unsafe is not recommended and may deprecated in future. Added a WhiteBox API to get VM page size.
Reviewed-by: dholmes, ccheung, mseledtsov
Contributed-by: yumin.qi@oracle.com
author | minqi |
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date | Wed, 26 Nov 2014 10:32:21 -0800 |
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/* * Copyright (c) 2014, 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 * @summary Using WhiteBox to get VM page size * @library /testlibrary /testlibrary/whitebox * @build ReadVMPageSize * @run main ClassFileInstaller sun.hotspot.WhiteBox * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI ReadVMPageSize */ import com.oracle.java.testlibrary.*; import sun.hotspot.WhiteBox; public class ReadVMPageSize { public static void main(String args[]) throws Exception { WhiteBox wb = WhiteBox.getWhiteBox(); int pageSize = wb.getVMPageSize(); if (pageSize < 0) { throw new Exception("pageSize < 0"); } else { System.out.println("Page size = " + pageSize); } } }