test/hotspot/jtreg/runtime/Unsafe/GetUncompressedObject.java
changeset 47216 71c04702a3d5
parent 41092 c388d897472d
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/jtreg/runtime/Unsafe/GetUncompressedObject.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,55 @@
+/*
+ * Copyright (c) 2015, 2016, 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
+ * @bug 8022853
+ * @library /test/lib
+ * @modules java.base/jdk.internal.misc
+ * @run main GetUncompressedObject
+ */
+
+import static jdk.test.lib.Asserts.*;
+
+import jdk.internal.misc.Unsafe;
+
+public class GetUncompressedObject {
+
+    public static void main(String args[]) throws Exception {
+        Unsafe unsafe = Unsafe.getUnsafe();
+
+        // Allocate some memory and fill it with non-zero values.
+        final int size = 32;
+        final long address = unsafe.allocateMemory(size);
+        unsafe.setMemory(address, size, (byte) 0x23);
+
+        // The only thing we can do is check for null-ness.
+        // So, store a null somewhere.
+        unsafe.putAddress(address + 16, 0);
+
+        Object nullObj = unsafe.getUncompressedObject(address + 16);
+        if (nullObj != null) {
+            throw new InternalError("should be null");
+        }
+    }
+
+}