help to undecorate function name

[silk (sent by Nabble.com)]

i have an gcc logfile and i ned to undecorate function name like this: 
_ZNSt13basic_filebufIcSt11char_traitsIcEEC1Ev@@GLIBCPP_3.2 
i want to know it's real name (name of function that was in the source file).
where can i get a specification or smthng like?
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http://www.nabble.com/help-to-undecorate-function-name-t617798.html#a1648755