Libbpf eBPF function bpf_usdt_arg_cnt
The bpf_usdt_arg_cnt function is used to get the number of USDT arguments available.
Definition
Return number of USDT arguments defined for currently traced USDT.
Usage
The bpf_usdt_arg_cnt function returns the number of arguments a tracepoint has.
This function uses specifiers that describe the arguments. These specifiers live in maps, defined in usdt.bpf.h which should be populated by the loader, in particular the bpf_program__attach_usdt function.
Example
Docs could be improved
This part of the docs is incomplete, contributions are very welcome