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Date: Thu, 25 Apr 2024 18:17:56 +0300
Message-Id: <86frv91nff.fsf@gnu.org>
From: Eli Zaretskii <eliz@gnu.org>
To: Luis Machado <luis.machado@arm.com>
Cc: gdb@sourceware.org, tom@tromey.com, nd@arm.com
In-Reply-To: <1575098d-c3de-4a87-9868-7ff5e5994312@arm.com> (message from Luis
	Machado on Thu, 25 Apr 2024 11:13:29 +0100)
Subject: Re: Debugging with GDB and ASLR
References: <86v8452237.fsf@gnu.org> <1575098d-c3de-4a87-9868-7ff5e5994312@arm.com>
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> Date: Thu, 25 Apr 2024 11:13:29 +0100
> Cc: nd <nd@arm.com>
> From: Luis Machado <luis.machado@arm.com>
> 
> On 4/25/24 11:01, Eli Zaretskii via Gdb wrote:
> > Hi,
> > 
> > It is well known that ASLR can get in the way of debugging some
> > problems because the addresses of data change between runs, and so
> > what you have learned from one debugging session cannot always be
> > safely used in another session, when ASLR is in effect.
> > 
> > I'm told that GDB disables ASLR, at least on GNU/Linux, for that
> > reason.  If that is true, could someone please point me to the code
> > which achieves that?  Also, is this done on other systems as well, and
> > specifically on MS-Windows when debugging native Windows programs?
> > 
> > TIA
> 
> On Linux, it does so through the personality function in gdb/nat/linux-personality.c.
> 
> I heard there were issues with disabling ASLR for Windows, but we seem to try to do
> it in gdb/nat/windows-nat.c:create_process_wrapper. Maybe the call to UpdateProcThreadAttribute
> attempts to do it?

Right, thanks.