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From: Pedro Alves <palves@redhat.com>
To: John Baldwin <jhb@freebsd.org>, gdb-patches@sourceware.org
Subject: Re: [PATCH] Fetch all registers before writing the core register notes.
Date: Mon, 16 Mar 2015 12:09:00 -0000	[thread overview]
Message-ID: <5506C7F2.5040605@redhat.com> (raw)
In-Reply-To: <2653052.Cuv9hkMi4i@ralph.baldwin.cx>

On 03/14/2015 10:02 PM, John Baldwin wrote:
> Without this, not all registers were present in the core generated by gcore.
> For example, running 'gcore' on a program without examining the vector 
> registers (SSE or AVX) would store all the vector registers as zeros because
> they were not pulled into the regcache.  Running 'info vector' before 'gcore'
> would store the correct values in the core since it populated the regcache.
> For Linux processes, a similar operation is achieved somewhat by having the
> thread iterator callback invoke target_fetch_registers on each thread before
> its corresponding register notes are dumped.
> 
> (I don't plan on including that level of detail in the commit log, just as
> a way to explain the bug this change fixes.)

I think it's good to have the detail in the log.  If you felt the need to
explain it for review, then a future archaeologist looking at git log/blame
would likely appreciate the same info.

> gdb/ChangeLog:
> 
> 	* fbsd-tdep.c (fbsd_make_corefile_notes): Fetch all target registers
> 	before writing core register notes.

Looks fine to me.

Thanks,
Pedro Alves


  reply	other threads:[~2015-03-16 12:09 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-03-14 22:02 John Baldwin
2015-03-16 12:09 ` Pedro Alves [this message]
2015-03-16 14:55   ` John Baldwin

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