Mercurial > jdk8-mips64-public > hotspot / annotate
test/runtime/memory/ReadVMPageSize.java@cc5c3ef1f03a (annotated)
test/runtime/memory/ReadVMPageSize.java
Wed, 26 Nov 2014 10:32:21 -0800
- author
- minqi
- date
- Wed, 26 Nov 2014 10:32:21 -0800
- changeset 7779
- cc5c3ef1f03a
- permissions
- -rw-r--r--
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
| minqi@7779 | 1 | /* |
| minqi@7779 | 2 | * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. |
| minqi@7779 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| minqi@7779 | 4 | * |
| minqi@7779 | 5 | * This code is free software; you can redistribute it and/or modify it |
| minqi@7779 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| minqi@7779 | 7 | * published by the Free Software Foundation. |
| minqi@7779 | 8 | * |
| minqi@7779 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| minqi@7779 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| minqi@7779 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| minqi@7779 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| minqi@7779 | 13 | * accompanied this code). |
| minqi@7779 | 14 | * |
| minqi@7779 | 15 | * You should have received a copy of the GNU General Public License version |
| minqi@7779 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| minqi@7779 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| minqi@7779 | 18 | * |
| minqi@7779 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| minqi@7779 | 20 | * or visit www.oracle.com if you need additional information or have any |
| minqi@7779 | 21 | * questions. |
| minqi@7779 | 22 | */ |
| minqi@7779 | 23 | |
| minqi@7779 | 24 | /* |
| minqi@7779 | 25 | * @test |
| minqi@7779 | 26 | * @summary Using WhiteBox to get VM page size |
| minqi@7779 | 27 | * @library /testlibrary /testlibrary/whitebox |
| minqi@7779 | 28 | * @build ReadVMPageSize |
| minqi@7779 | 29 | * @run main ClassFileInstaller sun.hotspot.WhiteBox |
| minqi@7779 | 30 | * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI ReadVMPageSize |
| minqi@7779 | 31 | */ |
| minqi@7779 | 32 | |
| minqi@7779 | 33 | import com.oracle.java.testlibrary.*; |
| minqi@7779 | 34 | import sun.hotspot.WhiteBox; |
| minqi@7779 | 35 | |
| minqi@7779 | 36 | public class ReadVMPageSize { |
| minqi@7779 | 37 | public static void main(String args[]) throws Exception { |
| minqi@7779 | 38 | WhiteBox wb = WhiteBox.getWhiteBox(); |
| minqi@7779 | 39 | int pageSize = wb.getVMPageSize(); |
| minqi@7779 | 40 | if (pageSize < 0) { |
| minqi@7779 | 41 | throw new Exception("pageSize < 0"); |
| minqi@7779 | 42 | } else { |
| minqi@7779 | 43 | System.out.println("Page size = " + pageSize); |
| minqi@7779 | 44 | } |
| minqi@7779 | 45 | } |
| minqi@7779 | 46 | } |
