--- a/graal/com.oracle.truffle.sl/src/com/oracle/truffle/sl/runtime/SLContext.java	Thu Jul 24 12:22:54 2014 -0700
+++ b/graal/com.oracle.truffle.sl/src/com/oracle/truffle/sl/runtime/SLContext.java	Thu Jul 24 16:14:44 2014 -0700
@@ -29,8 +29,11 @@
 import com.oracle.truffle.api.frame.*;
 import com.oracle.truffle.api.instrument.*;
 import com.oracle.truffle.api.nodes.*;
+import com.oracle.truffle.api.source.*;
+import com.oracle.truffle.sl.*;
 import com.oracle.truffle.sl.builtins.*;
 import com.oracle.truffle.sl.nodes.*;
+import com.oracle.truffle.sl.nodes.instrument.*;
 import com.oracle.truffle.sl.nodes.local.*;
 import com.oracle.truffle.sl.parser.*;
 
@@ -49,6 +52,7 @@
     private final PrintStream output;
     private final SLFunctionRegistry functionRegistry;
     private SourceCallback sourceCallback = null;
+    private SLASTProber astProber;
 
     public SLContext(BufferedReader input, PrintStream output) {
         this.input = input;
@@ -133,4 +137,28 @@
         /* Register the builtin function in our function registry. */
         getFunctionRegistry().register(name, rootNode);
     }
+
+    public void executeMain(Source source) {
+
+        if (sourceCallback != null) {
+            sourceCallback.startLoading(source);
+        }
+
+        Parser.parseSL(this, source, astProber);
+
+        if (sourceCallback != null) {
+            sourceCallback.endLoading(source);
+        }
+
+        SLFunction main = getFunctionRegistry().lookup("main");
+        if (main.getCallTarget() == null) {
+            throw new SLException("No function main() defined in SL source file.");
+        }
+        main.getCallTarget().call();
+    }
+
+    public void setASTNodeProber(SLASTProber astProber) {
+        // TODO Auto-generated method stub
+        this.astProber = astProber;
+    }
 }