--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.truffle.ruby.runtime/src/com/oracle/truffle/ruby/runtime/debug/RubyBreakBeforeProbe.java	Mon Jan 06 17:12:09 2014 +0000
@@ -0,0 +1,30 @@
+/*
+ * Copyright (c) 2013 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.runtime.debug;
+
+import com.oracle.truffle.api.frame.*;
+import com.oracle.truffle.api.nodes.*;
+import com.oracle.truffle.ruby.runtime.*;
+
+/**
+ * A probe for invoking a breakpoint shell before a child execution method.
+ */
+public final class RubyBreakBeforeProbe extends RubyProbe {
+
+    public RubyBreakBeforeProbe(RubyContext context) {
+        super(context);
+    }
+
+    @Override
+    public void enter(Node astNode, VirtualFrame frame) {
+        context.getDebugManager().haltedAt(astNode, frame.materialize());
+    }
+
+}