hotspot/test/runtime/Unsafe/GetPutAddress.java
changeset 28732 d4b650e48a8f
child 29678 dd2f3932c21e
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/runtime/Unsafe/GetPutAddress.java	Fri Jan 23 11:44:21 2015 -0800
@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2015, 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
+ * Verify behaviour of Unsafe.get/putAddress and Unsafe.addressSize
+ * @library /testlibrary
+ * @run main GetPutAddress
+ */
+
+import com.oracle.java.testlibrary.*;
+import sun.misc.Unsafe;
+import static com.oracle.java.testlibrary.Asserts.*;
+
+public class GetPutAddress {
+    public static void main(String args[]) throws Exception {
+        Unsafe unsafe = Utils.getUnsafe();
+        int addressSize = unsafe.addressSize();
+        // Ensure the size returned from Unsafe.addressSize is correct
+        assertEquals(unsafe.addressSize(), Platform.is32bit() ? 4 : 8);
+
+        // Write the address, read it back and make sure it's the same value
+        long address = unsafe.allocateMemory(addressSize);
+        unsafe.putAddress(address, address);
+        long readAddress = unsafe.getAddress(address);
+        if (addressSize == 4) {
+          readAddress &= 0x00000000FFFFFFFFL;
+        }
+        assertEquals(address, readAddress);
+        unsafe.freeMemory(address);
+    }
+}