Re: [RFC PATCH v6 1/5] Thread-local ABI system call: cache CPU number of running thread

[Florian Weimer]

On 04/07/2016 12:31 PM, Peter Zijlstra wrote:
> On Thu, Apr 07, 2016 at 11:01:25AM +0200, Florian Weimer wrote:
>>> Because ideally this structure would be part of the initial (glibc) TCB
>>> with fixed offset etc.
>>
>> This is not possible because we have layering violations and code
>> assumes it knows the precise of the glibc TCB.  I think Address
>> Sanitizer is in this category.  This means we cannot adjust the TCB size
>> based on the kernel headers used to compile glibc, and there will have
>> to be some indirection.
> 
> So with the proposed fixed sized object it would work, right?

I didn't see a proposal for a fixed size buffer, in the sense that the
size of struct sockaddr_in is fixed.

Florian