--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.truffle.ruby.nodes/src/com/oracle/truffle/ruby/nodes/debug/RubyProbe.java	Mon Feb 10 03:39:21 2014 +0000
@@ -0,0 +1,41 @@
+/*
+ * 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.nodes.instrument.*;
+import com.oracle.truffle.ruby.runtime.*;
+
+/**
+ * A "probe node" implemented specifically for the Ruby implementation; subclasses need only
+ * override those members of {@link InstrumentationProbeEvents} for which some action is needed.
+ */
+public abstract class RubyProbe extends InstrumentationProbeNode.DefaultProbeNode {
+
+    protected final boolean oneShot;
+
+    protected final RubyContext context;
+
+    /**
+     * OneShot is this a one-shot (self-removing) probe?
+     */
+    public RubyProbe(RubyContext context, boolean oneShot) {
+        super(context);
+        this.oneShot = oneShot;
+        this.context = context;
+    }
+
+    /**
+     * Is this a one-shot (self-removing) probe? If so, it will remove itself the first time
+     * activated.
+     */
+    public boolean isOneShot() {
+        return oneShot;
+    }
+}