Re: [RFC] Implementing RLIMIT_AS

[Diego Nieto Cid]

Hi,

I've been testing RLIMIT_DATA...

On Thu, Dec 19, 2024 at 10:36:49PM +0100, Luca wrote:
> 
> I see that some limits (e.g. RLIMIT_DATA) are managed in glibc instead of
> gnumach, maybe this could be a simpler way to add some minimal support? I
> guess that one might overcome these limits by using directly the mach rpc or
> hijacking glibc, but it could be enough for some use cases.
> 

I failed to make it do anything. The only place where RLIMIT_DATA is read is
in the Mach/Hurd specific `__hurd_set_brk` function.

    glibc-2.40/sysdeps/mach/hurd/brk.c:  rlimit = 
_hurd_rlimits[RLIMIT_DATA].rlim_cur;  
    [line 92]

Which is called from __sbrk, and at that point I'm lost.

Also, I cannot make it to fail with the attached test program.

malloc.c
Description: Text Data