dwarf information missing. how to rescue?

Shiyao Ma i@introo.me
Sat Apr 1 08:47:00 GMT 2017


Hi,

sudo stap -L 'kernel.function("tcp_cong_control")'
gives this mere output:
kernel.function("tcp_cong_control@./net/ipv4/tcp_input.c:3336")

No params, locals are included.

Should I recompile the kernel?  if so, with what flags?

I'd like all this functions be probe-able.


Best.



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