linux-kernel - Re: Extending coredump note section to contain filenames

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Message-ID: <4F5E99C4.7060305@zytor.com>
Date:	Mon, 12 Mar 2012 17:50:12 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Jan Kratochvil <jan.kratochvil@...hat.com>
CC:	Denys Vlasenko <dvlasenk@...hat.com>,
	Roland McGrath <roland@...k.frob.com>,
	linux-kernel@...r.kernel.org, Oleg Nesterov <oleg@...hat.com>,
	Kushal Das <kdas@...hat.com>
Subject: Re: Extending coredump note section to contain filenames

On 03/12/2012 05:46 PM, Jan Kratochvil wrote:
> On Tue, 13 Mar 2012 01:42:18 +0100, H. Peter Anvin wrote:
>> There is no 100% reliable solution possible -- you have no guarantee of
>> any kind that the library executable still exists.
> 
> I have guarantee that the library binary mapped in memory identified by
> build-id can be found out there in the could.  There is no other guarantee.
> And this guarantee fails with other solutions.
> 
> If you say that it is _additional_ info to build-id then yes, one can always
> use build-id if everything else fails.  But then the non-build-id information
> is redundant and it can just lead to wrong toolchain solutions - which has
> already happened (Apport).

You're thinking of a particular use case which isn't necessarily the
only one that matters.  It might be the only one that matters to *you*,
but that's very different to what matters to a developer, for example.

And yes of course the build-id should be included.

	-hpa

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

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