[lttng-dev] how to get the sockaddr struct from its pointer in kernel tracing

[Mathieu Desnoyers]

* Rui Han (r.han at umiami.edu) wrote:
> Hi,
> 
> In the sys_connect and sys_bind kernel tracing, a pointer to the socdaddr
> struct has been dumped. (i.e. the second argument in sys_bind: { cpu_id = 0
> }, { fd = 39, umyaddr = 0x7FE18E3D0B80, addrlen = 0xC }). What if I want to
> access the struct for the IP and port number related to the socket? Is
> there an easy way to do this? Please give me some hints. Thank you very
> much.

current, none.

A "quick" way to do this might be to add a tracepoint into these system
calls.

Eventually, we might look into supporting writing complex data
structures into lttng-modules, but this would require close integration
with the Linux kernel sources.

Thanks,

Mathieu

> 
> Regards,
> Rui

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-- 
Mathieu Desnoyers
Operating System Efficiency R&D Consultant
EfficiOS Inc.
http://www.efficios.com