API for getting symbol for a given addr

Does anybody know a method/API to retrieve the symbol from a u64 address?
...
Kernel symbols are in /boot/System.map , /proc/kallsyms, and user symbols usually in perf.map, but looking up these files will be quite slow for resolving a single addr

As an alternative, I am using stack_traces.get_stackid, translate stack_id to a vector of stack symbols, and get the top frame, but it still a rather slow method IMO, isn't it?
I am looking for a method to translate a given addr to symbol directly
Thanks for any advice.

Start with the stack_traces.get_stackid approach and the symbol sources named in the issue: /boot/System.map, /proc/kallsyms, and perf.map. Determine whether BCC has an existing entry point for translating an address directly to a symbol; done requires a defined API scope and an agreed way to verify the lookup behavior.

Written by the indexing model from the issue text.