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Date: Fri, 20 May 2011 16:15:00 -0000
Message-ID: <BANLkTikjXsU5yKT7hFipzn1JbwuCR05N2A@mail.gmail.com>
Subject: Re: [Patch, libfortran] PR 48931 Async-signal-safety of backtrace signal handler
From: Janne Blomqvist <blomqvist.janne@gmail.com>
To: GCC Patches <gcc-patches@gcc.gnu.org>, Fortran List <fortran@gcc.gnu.org>
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On Sun, May 15, 2011 at 14:12, Janne Blomqvist
<blomqvist.janne@gmail.com> wrote:
> Hi,
>
> so, here is take 3 (sigh). Compared to take 2, it no longer uses
> stdio, since opening a stdio FILE stream probably malloc()'s a buffer,
> which is not async-signal-safe.
>
> Regtested on x86_64-unknown-linux-gnu, Ok for trunk?
>
> 2011-05-15 =C2=A0Janne Blomqvist =C2=A0<jb@gcc.gnu.org>
>
> =C2=A0 =C2=A0 =C2=A0 =C2=A0PR libfortran/48931
> =C2=A0 =C2=A0 =C2=A0 =C2=A0* configure.ac: Check for backtrace_symbols_fd=
 instead of
> =C2=A0 =C2=A0 =C2=A0 =C2=A0backtrace_symbols, check for readlink.
> =C2=A0 =C2=A0 =C2=A0 =C2=A0* config.h.in: Regenerated.
> =C2=A0 =C2=A0 =C2=A0 =C2=A0* configure: Regenerated.
> =C2=A0 =C2=A0 =C2=A0 =C2=A0* runtime/backtrace.c (local_strcasestr): Remo=
ve.
> =C2=A0 =C2=A0 =C2=A0 =C2=A0(bt_header): New function.
> =C2=A0 =C2=A0 =C2=A0 =C2=A0(dump_glibc_backtrace): Remove.
> =C2=A0 =C2=A0 =C2=A0 =C2=A0(fd_gets): New function.
> =C2=A0 =C2=A0 =C2=A0 =C2=A0(show_backtrace): Rework to use backtrace_symb=
ols_fd and pipes,
> =C2=A0 =C2=A0 =C2=A0 =C2=A0reformat output.
> =C2=A0 =C2=A0 =C2=A0 =C2=A0* runtime/main.c (store_exe_path): Try to chec=
k /proc/self/exe
> =C2=A0 =C2=A0 =C2=A0 =C2=A0first.
>
>
>
> --
> Janne Blomqvist
>



--=20
Janne Blomqvist