ad-retrieve-args-form is a compiled Lisp function in `advice.el'.

(ad-retrieve-args-form ARGLIST)

Generate a form which evaluates into names/values/types of ARGLIST.
When the form gets evaluated within a function with that argument list
it will result in a list with one entry for each argument, where the
first element of each entry is the name of the argument, the second
element is its actual current value, and the third element is either
`required', `optional' or `rest' depending on the type of the argument.