Question about rr alternative design

Kyle Huey me at kylehuey.com
Tue Feb 20 20:23:40 UTC 2018


Pass `-w` to `rr record` to tell it to wait on the daemonized nginx process.

- Kyle

On Wed, Feb 21, 2018 at 9:17 AM, Octav Chipara <ochipara at gmail.com> wrote:
> Thank you for your replies.
>
> On an unrelated topic, I am trying to obtain a recording of nginx. However,
> if I start it from the command line, rr does not record any data (perhaps it
> is not following child processes). If this is not support, is it possible to
> attach rr to a running process?
>
> Thanks,
> — Octav
>
>
>
> On Feb 20, 2018, at 2:09 PM, Robert O'Callahan <robert at ocallahan.org> wrote:
>
> On Wed, Feb 21, 2018 at 8:30 AM, Nathan Froyd <nfroyd at mozilla.com> wrote:
>>
>> I don't know whether this alternative was considered
>
>
> Wrapping libc calls was considered. Section 3.1 of the extended technical
> report mentions it. As Nathan and Kyle said, it's simpler and more
> comprehensive to intercept system calls directly rather than wrap libc
> functions.
>
> Rob
> --
> Su ot deraeppa sah dna Rehtaf eht htiw saw hcihw, efil lanrete eht uoy ot
> mialcorp ew dna, ti ot yfitset dna ti nees evah ew; deraeppa efil eht. Efil
> fo Drow eht gninrecnoc mialcorp ew siht - dehcuot evah sdnah ruo dna ta
> dekool evah ew hcihw, seye ruo htiw nees evah ew hcihw, draeh evah ew hcihw,
> gninnigeb eht morf saw hcihw taht.
>
>
>
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