Re: [PATCH 1/1] tracing: Introduce "pseudo registers" for FETCH_MTD_reg

[Masami Hiramatsu]

(2013/11/24 5:16), Oleg Nesterov wrote:
> The probe can dump the registers or memory, but it is not possible
> to dump, say, current->pid. This patch adds the pseudo regs table,
> currently it has only two methods to get current/smp_processor_id
> but it can be trivially extended.

Good catch! :)

> This syntax is %%pseudo-reg-name, I agree in advance with any other
> naming.

For this kind of use, kprobe-tracer already provides '$' prefix :)
e.g. $stack, $retval etc. Please see parse_probe_vars in trace_probe.c.

So, $current and $cpu is better for me.

Thank you,

-- 
Masami HIRAMATSU
IT Management Research Dept. Linux Technology Center
Hitachi, Ltd., Yokohama Research Laboratory
E-mail: masami.hiramatsu.pt@xxxxxxxxxxx


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