demangling.cpp

std::string demangle_typeid_name(const std::string & mangled_name) {

#ifdef V8TOOLKIT_DEMANGLE_NAMES
//    printf("Starting name demangling\n");
    std::string result;
    int status;
    auto demangled_name_needs_to_be_freed = abi::__cxa_demangle(mangled_name.c_str(), nullptr, 0, &status);
    result = demangled_name_needs_to_be_freed;

    if (demangled_name_needs_to_be_freed == nullptr) {
	return mangled_name;
    }
    
    if (status == 0) {
        result = demangled_name_needs_to_be_freed;
    } else {
        // https://gcc.gnu.org/onlinedocs/libstdc++/libstdc++-html-USERS-4.3/a01696.html
        //-1: A memory allocation failiure occurred.
        //-2: mangled_name is not a valid name under the C++ ABI mangling rules.
        //-3: One of the arguments is invalid.
        result = mangled_name;
    }
    if (demangled_name_needs_to_be_freed) {
        free(demangled_name_needs_to_be_freed);
    }
    return result;

#else
    return mangled_name;
#endif
}