The Itanium C++ ABI plugin provides a custom demangler, an analysis that decodes mangled names and updates function signatures, and an analysis that decodes RTTI and vtables and discovers new procedures based on virtual function pointers.
The custom demangler converts the mangled names into abstract syntax trees, allowing to extract more type information than the built-in one. For example, it differentiates between complete and base class constructors and destructors.
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Note that the decoding is necessarily heuristic as some information is lost, e.g. class members and standalone functions in a namespace have an exactly identical mangling. It is possible that the this argument (or worse) would be missing--consult the full decoded name of the function (current_function.symbol.full_name) to see the result of decoding, and apply your expertise.
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