Mercurial > hg > graal-jvmci-8
comparison 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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22974:c2ce24504334 | 22975:cc5c3ef1f03a |
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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 /testlibrary/whitebox | |
28 * @build 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 } |