--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/snippets/ObjectSubstitutions.java	Sat Jan 12 21:43:12 2013 +0100
@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2012, 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.
+ */
+package com.oracle.graal.hotspot.snippets;
+
+import static com.oracle.graal.hotspot.snippets.HotSpotSnippetUtils.*;
+import static com.oracle.graal.nodes.extended.UnsafeCastNode.*;
+
+import com.oracle.graal.hotspot.nodes.*;
+import com.oracle.graal.snippets.*;
+import com.oracle.graal.snippets.ClassSubstitution.MethodSubstitution;
+import com.oracle.graal.word.*;
+
+/**
+ * Substitutions for {@link java.lang.Object} methods.
+ */
+@ClassSubstitution(java.lang.Object.class)
+public class ObjectSubstitutions {
+    @MethodSubstitution(isStatic = false)
+    public static Class<?> getClass(final Object thisObj) {
+        Word hub = loadHub(thisObj);
+        return unsafeCast(hub.readFinalObject(Word.signed(classMirrorOffset())), Class.class, true, true);
+    }
+
+    @MethodSubstitution(isStatic = false)
+    public static int hashCode(final Object thisObj) {
+        Word mark = loadWordFromObject(thisObj, markOffset());
+
+        // this code is independent from biased locking (although it does not look that way)
+        final Word biasedLock = mark.and(biasedLockMaskInPlace());
+        if (biasedLock == Word.unsigned(unlockedMask())) {
+            int hash = (int) mark.unsignedShiftRight(identityHashCodeShift()).rawValue();
+            if (hash != uninitializedIdentityHashCodeValue()) {
+                return hash;
+            }
+        }
+
+        return IdentityHashCodeStubCall.call(thisObj);
+    }
+}