function::print_ustack — Print out stack for the current task from string.
print_ustack(stk:string)
Perform a symbolic lookup of the addresses in the given string,
which is assumed to be the result of a prior call to
ubacktrace
for the current task.
Print one line per address, including the address, the name of the function containing the address, and an estimate of its position within that function. Return nothing.