How to obtain the number of arguments along with their data types?

[xiejingwei]

The interface gum_invocation_context_get_nth_argument can be leveraged to obtain the argument only if we know the index and the data type of the parameter.

The problem is, how can I access the two things while the program is running?

If I attach lots of functions on a single listener, and assume I can't figure out the exact one within the _on_enter interface. How can I print all the arguments of the functions I attached within the _on_enter interface?

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Update: What if the target function is variadic? How to print all its arguments in a elegant way within the running program?