1 /* 2 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /* 25 * @test 26 * @summary Using WhiteBox to get VM page size 27 * @library /testlibrary /../../test/lib 28 * @build com.oracle.java.testlibrary.* ReadVMPageSize 29 * @run main ClassFileInstaller sun.hotspot.WhiteBox 30 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI ReadVMPageSize 31 */ 32 33 import com.oracle.java.testlibrary.*; 34 import sun.hotspot.WhiteBox; 35 36 public class ReadVMPageSize { 37 public static void main(String args[]) throws Exception { 38 WhiteBox wb = WhiteBox.getWhiteBox(); 39 int pageSize = wb.getVMPageSize(); 40 if (pageSize < 0) { 41 throw new Exception("pageSize < 0"); 42 } else { 43 System.out.println("Page size = " + pageSize); 44 } 45 } 46 }