diff 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
date Wed, 26 Nov 2014 10:32:21 -0800
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/runtime/memory/ReadVMPageSize.java	Wed Nov 26 10:32:21 2014 -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);
+    }
+  }
+}