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Re: [PATCH, doc RFA] Remove support for "target m32rsdi" and "target mips/pmon/ddb/rockhopper/lsi"
- From: "Maciej W. Rozycki" <macro at imgtec dot com>
- To: Trevor Saunders <tbsaunde at tbsaunde dot org>
- Cc: Pedro Alves <palves at redhat dot com>, Trevor Saunders <tbsaunde+binutils at tbsaunde dot org>, Yao Qi <qiyaoltc at gmail dot com>, <gdb-patches at sourceware dot org>
- Date: Wed, 4 May 2016 02:02:56 +0100
- Subject: Re: [PATCH, doc RFA] Remove support for "target m32rsdi" and "target mips/pmon/ddb/rockhopper/lsi"
- Authentication-results: sourceware.org; auth=none
- References: <1458230389-28233-1-git-send-email-palves at redhat dot com> <8637rivld3 dot fsf at gmail dot com> <56F13269 dot 8020602 at redhat dot com> <alpine dot DEB dot 2 dot 00 dot 1603302303250 dot 9427 at tp dot orcam dot me dot uk> <56FD12FE dot 1030300 at redhat dot com> <alpine dot DEB dot 2 dot 00 dot 1604020049090 dot 21372 at tp dot orcam dot me dot uk> <a378644c-b0a4-50eb-2fe9-fe046b5af145 at redhat dot com> <alpine dot DEB dot 2 dot 00 dot 1605031545470 dot 21846 at tp dot orcam dot me dot uk> <70b62cd3-436b-2495-dd87-4bebf3de9e87 at redhat dot com> <20160503235813 dot GA4366 at tsaunders-iceball dot corp dot tor1 dot mozilla dot com>
On Wed, 4 May 2016, Trevor Saunders wrote:
> > > Especially the heuristic
> > > unwinder bits look highly suspicious to me, where the variable is updated
> > > as the analysis proceeds. It could be that these variables can indeed go,
> > > but perhaps something is missing that should be there.
>
> perhaps, my guess is that it was necessary at one time, but isn't
> anymore.
That can be tracked down rather easily now that we have GIT rather than
CVS driving our repository, but I'm more concerned they might be symptoms
of unfinished or buggy code. This is hairy stuff (by definition, actually
-- where there's no DWARF information available we should try PDR records
first, where available, before resorting, in desperation, to heuristics).
Maciej