function::print_usyms — Print out user stack from string
String with list of hexadecimal (user) addresses
This function performs a symbolic lookup of the addresses in the given string, which are assumed to be the result of prior calls to
ucallers, and similar functions.
Prints one line per address, including the address, the name of the function containing the address, and an estimate of its position within that function, as obtained by
usymdata. Returns nothing.