<rdar://problem/15906684>

The way in which we were determining whether a python module had already been imported in the current session stopped working due to the IOHandler changes
As a result, importing in a new debug session a module which had been imported in a previous session did not work
This commit restores that functionality by checking for the module's presence in the session dictionary (which should be more correct anyway)

llvm-svn: 201623

lldb/source/Interpreter/ScriptInterpreterPython.cpp

@@ -2278,7 +2278,6 @@ ScriptInterpreterPython::LoadScriptingModule (const char* pathname,
         command_stream.Clear();
         command_stream.Printf("sys.modules.__contains__('%s')",basename.c_str());
         bool does_contain = false;
-        int refcount = 0;
         // this call will succeed if the module was ever imported in any Debugger in the lifetime of the process
         // in which this LLDB framework is living
         bool was_imported_globally = (ExecuteOneLineWithReturn(command_stream.GetData(),
@@ -2288,10 +2287,7 @@ ScriptInterpreterPython::LoadScriptingModule (const char* pathname,
         // this call will fail if the module was not imported in this Debugger before
         command_stream.Clear();
         command_stream.Printf("sys.getrefcount(%s)",basename.c_str());
-        bool was_imported_locally = (ExecuteOneLineWithReturn(command_stream.GetData(),
-                                                              ScriptInterpreterPython::eScriptReturnTypeInt,
-                                                              &refcount,
-                                                              ScriptInterpreter::ExecuteScriptOptions().SetEnableIO(false).SetSetLLDBGlobals(false)) && refcount > 0);
+        bool was_imported_locally = !(GetSessionDictionary().GetItemForKey(basename.c_str()).IsNULLOrNone());
         
         bool was_imported = (was_imported_globally || was_imported_locally);