RR_MAGIC_SAVE_DATA_FD

Kyle Huey me at kylehuey.com
Fri Sep 2 18:28:46 UTC 2016


Thanks for the explanation.

- Kyle

On Fri, Sep 2, 2016 at 11:16 AM, Chris Jones <jones.chris.g at gmail.com> wrote:
> RR_MAGIC_SAVE_DATA_FD is/was a debugging feature to cheaply verify blobs of
> memory across record/replay that checksumming either couldn't, or couldn't
> do efficiently.  I'd planned to use it for automatic syscallbuf param
> checking in https://github.com/mozilla/rr/issues/195 .  rr users can also
> (ab)use it to stash away data that they could cheaply correlate with the
> rest of the trace, like for example screenshots.  But this was never used
> AFAIK.
>
> Cheers,
> Chris
>
> On Fri, Sep 2, 2016 at 9:38 AM, Kyle Huey <me at kylehuey.com> wrote:
>>
>> Is this actually used for anything?  It doesn't appear to be.
>>
>> - Kyle
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>
>


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