--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.truffle.api/src/com/oracle/truffle/api/debug/DebugSupportProvider.java	Tue Jun 09 15:20:30 2015 -0700
@@ -0,0 +1,70 @@
+/*
+ * Copyright (c) 2015, 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.debug;
+
+import com.oracle.truffle.api.frame.*;
+import com.oracle.truffle.api.instrument.*;
+import com.oracle.truffle.api.nodes.*;
+import com.oracle.truffle.api.source.*;
+
+/**
+ * Access to language-specific information and execution services to enable debugging.
+ */
+public interface DebugSupportProvider extends ToolSupportProvider {
+
+    /**
+     * Runs source code.
+     *
+     * @param source code
+     * @throws DebugSupportException if unable to run successfully
+     */
+    void run(Source source) throws DebugSupportException;
+
+    /**
+     * Runs source code in a halted execution context, or at top level.
+     *
+     * @param source the code to run
+     * @param node node where execution halted, {@code null} if no execution context
+     * @param mFrame frame where execution halted, {@code null} if no execution context
+     * @return result of running the code in the context, or at top level if no execution context.
+     * @throws DebugSupportException if the evaluation cannot be performed
+     */
+    Object evalInContext(Source source, Node node, MaterializedFrame mFrame) throws DebugSupportException;
+
+    /**
+     * Creates a language-specific factory to produce instances of {@link AdvancedInstrumentRoot}
+     * that, when executed, computes the result of a textual expression in the language; used to
+     * create an
+     * {@linkplain Instrument#create(AdvancedInstrumentResultListener, AdvancedInstrumentRootFactory, Class, String)
+     * Advanced Instrument}.
+     *
+     * @param expr a guest language expression
+     * @param resultListener optional listener for the result of each evaluation.
+     * @return a new factory
+     * @throws DebugSupportException if the factory cannot be created, for example if the expression
+     *             is badly formed.
+     */
+    AdvancedInstrumentRootFactory createAdvancedInstrumentRootFactory(String expr, AdvancedInstrumentResultListener resultListener) throws DebugSupportException;
+}