hotspot/test/runtime/Unsafe/FieldOffset.java
changeset 28732 d4b650e48a8f
child 28951 a29d2048e16a
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/runtime/Unsafe/FieldOffset.java	Fri Jan 23 11:44:21 2015 -0800
@@ -0,0 +1,65 @@
+/*
+ * 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
+ * @summary Verifies the behaviour of Unsafe.fieldOffset
+ * @library /testlibrary
+ * @run main FieldOffset
+ */
+
+import java.lang.reflect.Field;
+import com.oracle.java.testlibrary.*;
+import sun.misc.Unsafe;
+import java.lang.reflect.*;
+import static com.oracle.java.testlibrary.Asserts.*;
+
+public class FieldOffset {
+    public static void main(String args[]) throws Exception {
+        Unsafe unsafe = Utils.getUnsafe();
+        Field fields[] = Test.class.getDeclaredFields();
+
+        for (int i = 0; i < fields.length; i++) {
+            int offset = unsafe.fieldOffset(fields[i]);
+            // Ensure we got a valid offset value back
+            assertNotEquals(offset, unsafe.INVALID_FIELD_OFFSET);
+
+            // Make sure the field offset is unique
+            for (int j = 0; j < i; j++) {
+                assertNotEquals(offset, unsafe.fieldOffset(fields[j]));
+            }
+        }
+    }
+
+    class Test {
+        boolean booleanField;
+        byte byteField;
+        char charField;
+        double doubleField;
+        float floatField;
+        int intField;
+        long longField;
+        Object objectField;
+        short shortField;
+    }
+}