Bug#554574: libstdc++6: apt segfaults on hppa

[Matthias Klose <doko@debian.org>]

On 05.11.2009 14:30, Domenico Andreoli wrote:
> Package: libstdc++6
> Version: 4.4.2-2
> Severity: grave
>
> Hi,
>
>    after this morning upgrade apt started to systematically segfault
> on my hppa box, not even an update was allowed. i reported this on the
> hppa porters list [0].
>
> of course suspect no. 1 is the NPTL switch but downgrading eglibc to
> 2.10.1-3 or even -2 did not improve the situation. i also tried with
> standard kernel 2.6.30-2-parisc-smp (at that moment i was running
> 2.6.32-rc5) but still nothing.
>
> then i tried to rebuild apt with the latest stuff, just in case NPTL
> switch introduced any compatibility issue but g++ died at least one
> time during usual autoconf g++ usability tests.
>
> finally i tried downgrading libstdc++6 to 4.4.2-1 and it looks like
> the problem is gone. indeed this package was upgraded this morning.
>
> in the meanwhile 2.6.32-rc6 had been built and booted nicely. i've
> then been able to use apt again and re-upgraded eglibc to 2.10.1-5 and
> everything still works.
>
> upgrading g++-4.4&  related stuff back to 4.4.2-2 not only reintroduces
> the problem but it does not even get past the whole process dying before
> the end. downgrading to 4.4.2-1 settles everything again.
>
> frankly i do not know what to do next, besides trying to rebuild gcc-4.4
> 4.4.2-1 with latest eglibc to see if it is the culprit

or rebuild against eglibc-2.9. could you do this as a test?

> or it is rather
> the svn merge between gcc 4.4.2-1 and -2.


test results for 4.4.2-1:
  http://gcc.gnu.org/ml/gcc-testresults/2009-10/msg01919.html
for 4.4.2-2:
  http://gcc.gnu.org/ml/gcc-testresults/2009-11/msg00351.html

there are some differences, which are not seen in Dave's build:
  http://gcc.gnu.org/ml/gcc-testresults/2009-11/msg00047.html

there are some parisc scpecific changes:

2009-10-23  John David Anglin  <dave.anglin@nrc-cnrc.gc.ca>

        Backport from mainline:
        2009-08-19  John David Anglin  <dave.anglin@nrc-cnrc.gc.ca>

        * pa.md (reload_inhi, reload_outhi, reload_inqi, reload_outqi): New
        patterns.
        * pa.c (emit_move_sequence): Check if address of operand1 is valid
        for mode mode of operand0 when doing secondary reload for SAR.

2009-10-20  John David Anglin  <dave.anglin@nrc-cnrc.gc.ca>

        Backport from mainline:
        2009-10-15  John David Anglin  <dave.anglin@nrc-cnrc.gc.ca>

        PR target/41702
        * pa.md (casesi): Use sign extended index in call to
        gen_casesi64p.
        (casesi64p): Update pattern to reflect above.

> thanks,
> Domenico
>
> [0] http://lists.debian.org/debian-hppa/2009/11/msg00005.html
>
>
> -- System Information:
> Debian Release: squeeze/sid
>    APT prefers unstable
>    APT policy: (990, 'unstable'), (1, 'experimental')
> Architecture: hppa (parisc)
>
> Kernel: Linux 2.6.32-rc6 (SMP w/2 CPU cores)
> Locale: LANG=C, LC_CTYPE=it_IT (charmap=ISO-8859-1)
> Shell: /bin/sh linked to /bin/bash
>
> Versions of packages libstdc++6 depends on:
> hi  gcc-4.4-base                  4.4.2-1    The GNU Compiler Collection (base
> ii  libc6                         2.10.1-5   GNU C Library: Shared libraries
> hi  libgcc4                       4.4.2-1    GCC support library