Is there a way to know the exact instruction count of a probe?

[yzhao1012]

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Our BCC C code runs on 4.14 kernels or newer, whose probes still have the limit of 4096 instructions.

Is there a way to check the instruction count of the probe before attaching them? So that we could report failure to userspace before trying to attaching the probes?

[chenhengqi]

Maybe you can use bpf_function_size:

https://github.com/iovisor/bcc/blob/5f44839aecabe57f5146a457e5dec763ccb068e3/src/python/bcc/init.py#L515