Add inspection of function for optimized frames

test/mjsunit/debug-evaluate-locals-optimized.js

 // Copyright 2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 31 matching lines @@
       for (var i = 0; i < exec_state.frameCount(); i++) {
         var frame = exec_state.frame(i);
         // All frames except the bottom one has normal variables a and b.
         if (i < exec_state.frameCount() - 1) {
           assertEquals('a', frame.localName(0));
           assertEquals('b', frame.localName(1));
           assertEquals(i * 2 + 1, frame.localValue(0).value());
           assertEquals(i * 2 + 2, frame.localValue(1).value());
         }
 
+        // Check the frame function.
+        switch (i) {
+          case 0: assertEquals(h, frame.func().value()); break;
+          case 1: assertEquals(g3, frame.func().value()); break;
+          case 2: assertEquals(g2, frame.func().value()); break;
+          case 3: assertEquals(g1, frame.func().value()); break;
+          case 4: assertEquals(f, frame.func().value()); break;
+          case 5: break;
+          default: assertUnreachable();
+        }
+
         // When function f is optimized (2 means YES, see runtime.cc) we
         // expect an optimized frame for f with g1, g2 and g3 inlined.
         if (%GetOptimizationStatus(f) == 2) {
           if (i == 1 || i == 2 || i == 3) {
             assertTrue(frame.isOptimizedFrame());
             assertTrue(frame.isInlinedFrame());
           } else if (i == 4) {
             assertTrue(frame.isOptimizedFrame());
             assertFalse(frame.isInlinedFrame());
           } else {
@@ skipping 48 matching lines @@
   g1(a, b);
 };
 
 f(11, 12);
 
 // Make sure that the debug event listener vas invoked.
 assertFalse(exception, "exception in listener " + exception)
 assertTrue(listenerComplete);
 
 Debug.setListener(null);