Re: [Xen-devel] [PATCH] x86: slightly improve stack trace on debug builds

[Keir Fraser <keir@xxxxxxx>]

On 25/09/2012 17:20, "Jan Beulich" <JBeulich@xxxxxxxx> wrote:

>> Lol, how does your brain work this way? It took me 15 minutes to decode this
>> to something like (also I added range checks on ESP_BEFORE_EXCEPTION(regs),
>> what do you think?):
> 
> Sorry for this - just wanted to avoid having the condition evaluated
> (and spelled out) twice (and it took me a minute at most to find this
> iterate-at-most-twice solution).

It's the kind of code that is definitely easier to write than to read. ;-)



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