--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.truffle.ruby.nodes/src/com/oracle/truffle/ruby/nodes/debug/InactiveLeaveDebugProbe.java	Mon Feb 10 03:39:21 2014 +0000
@@ -0,0 +1,39 @@
+/*
+ * Copyright (c) 2013, 2014 Oracle and/or its affiliates. All rights reserved. This
+ * code is released under a tri EPL/GPL/LGPL license. You can use it,
+ * redistribute it and/or modify it under the terms of the:
+ *
+ * Eclipse Public License version 1.0
+ * GNU General Public License version 2
+ * GNU Lesser General Public License version 2.1
+ */
+package com.oracle.truffle.ruby.nodes.debug;
+
+import com.oracle.truffle.api.*;
+import com.oracle.truffle.api.frame.*;
+import com.oracle.truffle.api.nodes.*;
+import com.oracle.truffle.ruby.runtime.*;
+
+public abstract class InactiveLeaveDebugProbe extends RubyProbe {
+
+    private final Assumption inactiveAssumption;
+
+    public InactiveLeaveDebugProbe(RubyContext context, Assumption inactiveAssumption) {
+        super(context, false);
+        this.inactiveAssumption = inactiveAssumption;
+    }
+
+    @Override
+    public void leave(Node astNode, VirtualFrame frame, Object result) {
+        try {
+            inactiveAssumption.check();
+        } catch (InvalidAssumptionException e) {
+            final ActiveLeaveDebugProbe activeNode = createActive();
+            replace(activeNode);
+            activeNode.leave(astNode, frame, result);
+        }
+    }
+
+    protected abstract ActiveLeaveDebugProbe createActive();
+
+}