Re: [PATCH] ftrace: distinguish kretprobe'd functions in trace logs

[Steven Rostedt]

On Wed, 28 May 2008, Abhishek Sagar wrote:
>
> But if irq_enter() has a kretprobe installed on it, the return value stored on the stack at each invocation is modified to divert the return to a kprobe trampoline function called kretprobe_trampoline(). So with this the trace would (currently) look like:
>
> <idle>-0     [00] 4154504455.781616: irq_enter <- kretprobe_trampoline
>
> Now this is quite misleading to the end user, as it suggests something that didn't actually happen. So just to avoid such misinterpretations, the inlined patch aims to output such a log as:
>
> <idle>-0     [00] 4154504455.781616: irq_enter <- [unknown/kretprobe'd]
>
>
> Signed-off-by: Abhishek Sagar <sagar.abhishek@xxxxxxxxx>

Thanks Abhishek,

Acked-by: Steven Rostedt <srostedt@xxxxxxxxxx>

-- Steve

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/