--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.truffle.api/src/com/oracle/truffle/api/DebugManager.java	Tue Dec 17 20:22:45 2013 -0800
@@ -0,0 +1,67 @@
+/*
+ * Copyright (c) 2013, 2013, 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.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * 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.truffle.api;
+
+import com.oracle.truffle.api.source.*;
+
+/**
+ * Language-agnostic access to AST-based debugging support.
+ * <p>
+ * <strong>WARNING:</strong> this interface is under development and will change substantially.
+ */
+public interface DebugManager {
+
+    /**
+     * Sets a breakpoint at a line-based location.
+     */
+    LineBreakpoint setBreakpoint(SourceLineLocation lineLocation);
+
+    /**
+     * Sets a breakpoint at a line-based location with a boolean expression in the guest language to
+     * serve as a break condition.
+     */
+    LineBreakpoint setConditionalBreakpoint(SourceLineLocation lineLocation, String condition);
+
+    /**
+     * Gets a list of current breakpoints.
+     */
+    LineBreakpoint[] getBreakpoints();
+
+    /**
+     * Removes a breakpoint at a line-based location.
+     */
+    void removeBreakpoint(SourceLineLocation lineLocation);
+
+    /**
+     * Description of a line-based breakpoint.
+     */
+    interface LineBreakpoint {
+
+        SourceLineLocation getSourceLineLocation();
+
+        String getDebugStatus();
+    }
+
+}