--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/c1x4hotspotsrc/HotSpotVM/src/com/sun/hotspot/c1x/HotSpotProxy.java	Mon Aug 16 18:59:36 2010 -0700
@@ -0,0 +1,86 @@
+/*
+ * Copyright (c) 2010 Sun Microsystems, Inc. All rights reserved.
+ *
+ * Sun Microsystems, Inc. has intellectual property rights relating to technology embodied in the product that is
+ * described in this document. In particular, and without limitation, these intellectual property rights may include one
+ * or more of the U.S. patents listed at http://www.sun.com/patents and one or more additional patents or pending patent
+ * applications in the U.S. and in other countries.
+ *
+ * U.S. Government Rights - Commercial software. Government users are subject to the Sun Microsystems, Inc. standard
+ * license agreement and applicable provisions of the FAR and its supplements.
+ *
+ * Use is subject to license terms. Sun, Sun Microsystems, the Sun logo, Java and Solaris are trademarks or registered
+ * trademarks of Sun Microsystems, Inc. in the U.S. and other countries. All SPARC trademarks are used under license and
+ * are trademarks or registered trademarks of SPARC International, Inc. in the U.S. and other countries.
+ *
+ * UNIX is a registered trademark in the U.S. and other countries, exclusively licensed through X/Open Company, Ltd.
+ */
+package com.sun.hotspot.c1x;
+
+/**
+ * Provides methods to classify the HotSpot-internal identifiers.
+ *
+ * @author Lukas Stadler
+ */
+public class HotSpotProxy {
+
+    private HotSpotProxy() {
+    }
+
+    private enum CompilerObjectType {
+        // this enum needs to have the same values as the one in c1x_Compiler.hpp
+        STUB(0x100000000000000l),
+        METHOD(0x200000000000000l),
+        CLASS(0x300000000000000l),
+        SYMBOL(0x400000000000000l),
+        CONSTANT_POOL(0x500000000000000l),
+        CONSTANT(0x600000000000000l),
+        TYPE_MASK(0xf00000000000000l);
+
+        public final long bits;
+
+        CompilerObjectType(long bits) {
+            this.bits = bits;
+        }
+    }
+
+    private static boolean isType(long id, CompilerObjectType type) {
+        return (id & CompilerObjectType.TYPE_MASK.bits) == type.bits;
+    }
+
+    public static boolean isStub(long id) {
+        return isType(id, CompilerObjectType.STUB);
+    }
+
+    public static boolean isMethod(long id) {
+        return isType(id, CompilerObjectType.METHOD);
+    }
+
+    public static boolean isClass(long id) {
+        return isType(id, CompilerObjectType.CLASS);
+    }
+
+    public static boolean isSymbol(long id) {
+        return isType(id, CompilerObjectType.SYMBOL);
+    }
+
+    public static boolean isConstantPool(long id) {
+        return isType(id, CompilerObjectType.CONSTANT_POOL);
+    }
+
+    public static boolean isConstant(long id) {
+        return isType(id, CompilerObjectType.CONSTANT_POOL);
+    }
+
+    public static String toString(long id) {
+        CompilerObjectType type = null;
+        for (CompilerObjectType t : CompilerObjectType.values()) {
+            if ((id & CompilerObjectType.TYPE_MASK.bits) == t.bits) {
+                type = t;
+            }
+        }
+        long num = id & ~CompilerObjectType.TYPE_MASK.bits;
+        return type + " " + num;
+    }
+
+}