A brutal approach to V8 script liveedit

src/liveedit.h

 // Copyright 2010 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
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 // in order to analyze, whether the function changed its outer scope
 // expectations (or number of parameters). If it didn't, function's code is
 // patched with a newly compiled code. If it did change, enclosing function
 // gets patched. All inner functions are left untouched, whatever happened
 // to them in a new script version. However, new version of code will
 // instantiate newly compiled functions.
 
 
 #include "compiler.h"
 
+#ifdef ENABLE_DEBUGGER_SUPPORT
+
 namespace v8 {
 namespace internal {
 
+void ChangeScriptLive(Handle<Script> original_script,
+                      Handle<String> original_source,
+                      Handle<String> new_source,
+                      Handle<FixedArray> function_shared_info,
+                      int function_shared_info_len,
+                      int pos, int len_old, int len_new);
+
+
+class FunctionInfoListener;
+
 // This class collects some specific information on structure of functions
 // in a particular script. It gets called from compiler all the time, but
 // actually records any data only when liveedit operation is in process;
 // in any other time this class is very cheap.
 //
 // The primary interest of the Tracker is to record function scope structures
 // in order to analyze whether function code maybe safely patched (with new
 // code successfully reading existing data from function scopes). The Tracker
 // also collects compiled function codes.
 class LiveEditFunctionTracker {
  public:
   LiveEditFunctionTracker(FunctionLiteral* fun);
   ~LiveEditFunctionTracker();
   void RecordFunctionCode(Handle<Code> code);
   void RecordFunctionScope(Scope* scope);
 
   static bool IsActive();
 };
 
 } }  // namespace v8::internal
 
+#endif  // ENABLE_DEBUGGER_SUPPORT
+
 #endif /* V*_LIVEEDIT_H_ */