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Date:      Thu, 5 Nov 2020 13:20:37 +0100
From:      Paul Floyd <pjfloyd@wanadoo.fr>
To:        freebsd-hackers@freebsd.org
Subject:   Re: Extra memory mapping seen on freebsd-12 which was not seen in freebsd-11
Message-ID:  <88f9ce22-2c31-9e17-9aa8-60347816800f@wanadoo.fr>
In-Reply-To: <CAB6rxaSYv8Y7n5q-DrNR4x=d613k%2BibNOQ0NgnGCsyWdC0=u4g@mail.gmail.com>
References:  <CAB6rxaSNSoCywTy6tx6w%2B%2B-aJhQHb3FJiHoRL0vXs2CJAHe1OA@mail.gmail.com> <9CCF59F6-06F2-4352-94E5-C508E165D0C2@wanadoo.fr> <CAB6rxaRMOpx9eotjuNuUX_Ua3UZ-0KCbFdTSdEwXptjbG1%2BGUA@mail.gmail.com> <C50BCC03-832E-4CB7-8078-0E304705E757@wanadoo.fr> <CAB6rxaSYv8Y7n5q-DrNR4x=d613k%2BibNOQ0NgnGCsyWdC0=u4g@mail.gmail.com>

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On 10/17/20 6:29 AM, karnajit wangkhem wrote:
> Hi Paul,
>
> The mappings of these applications existed prior to the guard change, which
> was fine as no mapping existed on the memory range. With migration to
> stable 12, I was doubting that these mappings are no longer correct. But at
> the same time, does valgrind have to own this segment, which only came post
> certain freebsd releases?

Hi

I'm not sure if Valgrind needs to own the guest stack in order to be 
able to grow it.

Could you open a bugzilla item for this (on valgrind-devel)? That way 
I'll be sure not to forget about it.


A+

Paul




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