Index: Lib/hotshot/__init__.py
===================================================================
--- Lib/hotshot/__init__.py	(revision 60900)
+++ Lib/hotshot/__init__.py	(working copy)
@@ -62,6 +62,7 @@
         The string is compiled before profiling begins.
         """
         code = compile(cmd, "<string>", "exec")
+        globals.setdefault('__builtins__', __builtins__)
         self._prof.runcode(code, globals, locals)
         return self
 
Index: Lib/test/test_hotshot.py
===================================================================
--- Lib/test/test_hotshot.py	(revision 60900)
+++ Lib/test/test_hotshot.py	(working copy)
@@ -123,6 +123,26 @@
             sys.path = orig_path
             if os.path.exists(test_support.TESTFN):
                 os.remove(test_support.TESTFN)
+    
+    def test_builtins_present_in_globals(self):
+        """__builtins__ is present in the runctx() context even if it is not 
+        present in the globals arg.
+        """
+        profiler = self.new_profiler()
+        try:
+            profiler.runctx('len', {}, {})
+        except NameError:
+            self.fail('runctx() globals should include builtins')
+    
+    def test_builtins_can_be_overriden(self):
+        """If __builtins__ is supplied in the runctx() globals arg, it 
+        replaces the default __builtins__.
+        """
+        profiler = self.new_profiler()
+        # The chances of hotshot ever containing a 'len' is rather small
+        myglobals = {'__builtins__': hotshot}
+        self.assertRaises(NameError, profiler.runctx, 'len', myglobals, {})
+    
 
 def test_main():
     test_support.run_unittest(HotShotTestCase)