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Re: [BZ#17090/17620/17621]: fix DTV race, assert, and DTV_SURPLUS Static TLS limit
- From: Alan Modra <amodra at gmail dot com>
- To: Alexandre Oliva <aoliva at redhat dot com>
- Cc: Roland McGrath <roland at hack dot frob dot com>, codonell at redhat dot com, libc-alpha at sourceware dot org
- Date: Wed, 4 Mar 2015 15:35:29 +1030
- Subject: Re: [BZ#17090/17620/17621]: fix DTV race, assert, and DTV_SURPLUS Static TLS limit
- Authentication-results: sourceware.org; auth=none
- References: <20141118203338 dot ECA5F2C3B25 at topped-with-meat dot com> <ord28kkvpq dot fsf at free dot home> <20141118224048 dot 600312C3B23 at topped-with-meat dot com> <orppcjotfm dot fsf at free dot home> <20141120021703 dot 86F032C3B18 at topped-with-meat dot com> <or8uj6qse8 dot fsf at free dot home> <oroas0mzri dot fsf at free dot home> <orlhmgyall dot fsf at free dot home> <orlhlgdb8d dot fsf at livre dot home> <ormw411b25 dot fsf at livre dot home>
On Thu, Feb 26, 2015 at 02:44:34AM -0300, Alexandre Oliva wrote:
> On Jan 5, 2015, Alexandre Oliva <aoliva@redhat.com> wrote:
>
> > On Dec 9, 2014, Alexandre Oliva <aoliva@redhat.com> wrote:
> >> On Nov 21, 2014, Alexandre Oliva <aoliva@redhat.com> wrote:
> >>> No regressions on x86_64-linux-gnu. Ok to install?
>
> >> Ping?
> >> https://sourceware.org/ml/libc-alpha/2014-11/msg00590.html
>
> > Ping?
>
> Ping?
Thanks for looking into this. I applied your patch on top of a
revised version of my "tlsdesc" patch for powerpc,
https://sourceware.org/ml/libc-alpha/2010-02/msg00025.html minus the
elf/dlopen.c bits. My patch alone regresses elf/tst-tls7,
elf/tst-tls8 and nptl/tst-stack4 on powerpc-linux and powerpc64-linux.
With your patch added the first two regressions disappear.
nptl/tst-stack4 fails with segfaults with or without your patch. :-(
As does nptl/tst-stack4 on x86_64 if tst-stack4mod.so is built with
-mtls-dialect=gnu2.
--
Alan Modra
Australia Development Lab, IBM