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Re: PR 2488 status and some unwinder questions

From: Jan Kratochvil <jan dot kratochvil at redhat dot com>
To: Paul Pluzhnikov <ppluzhnikov at google dot com>
Cc: Phil Muldoon <pmuldoon at redhat dot com>, archer at sourceware dot org
Date: Fri, 21 Nov 2008 19:24:18 +0100
Subject: Re: PR 2488 status and some unwinder questions
References: <49269DF3.8080408@redhat.com> <8ac60eac0811211018k134be1cbgb2c1162dc3ea006d@mail.gmail.com>

On Fri, 21 Nov 2008 19:18:02 +0100, Paul Pluzhnikov wrote:
> $ nm /usr/lib64/libgcc_s.so | grep uw_install
> 00000000000087b0 t uw_install_context_1
...
> If you mean "visible to GDB via symbol table", then it already is.

This is distro specific.  Fedora (10) has libgcc_s stripped:
$ nm /lib64/libgcc_s.so.1 
nm: /lib64/libgcc_s.so.1: no symbols
$ l /usr/lib/gcc/x86_64-redhat-linux/4.3.2/libgcc_s.so
lrwxrwxrwx 1 root root 20 2008-11-06 23:41 /usr/lib/gcc/x86_64-redhat-linux/4.3.2/libgcc_s.so -> /lib64/libgcc_s.so.1*

> GDB on Linux already requires libpthread.so to not be stripped, or thread
> debugging doesn't work.

Yes, there is a possibility for a stripping exception (for Fedora) also for
libgcc_s.so as currently already happens for libpthread.so.

Regards,
Jan

References:
- PR 2488 status and some unwinder questions
  - From: Phil Muldoon
- Re: PR 2488 status and some unwinder questions
  - From: Paul Pluzhnikov

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