Re: [Boost-users] Exception handling inside a dll

Subject: Re: [Boost-users] Exception handling inside a dll
From: Roland Bock (rbock_at_[hidden])
Date: 2008-10-06 14:26:20

Hi Matthew,

just to be thorough: Visibility issues can also occur with MS Visual 
C++. It is not a "speciality" of gcc, although the command line flags 
might be different, of course (I wouldn't know about that).

If you're compiling with visibility=hidden (or the MS equivalent), then 
I would expect the problem you described (not being able to catch an 
exception is exactly what happened to me).

Not running into exceptions is also a good solution, though :-)

Regards,

Roland

Matthew LaCrosse wrote:
> Thank you Roland. I haven't tried compiling with gcc yet. I'm using MS 
> Visual C++ 9.0.
> 
> What I ended up doing was just writing a filter to block the invalid 
> expression that was causing the crash.
> 
> On Mon, Oct 6, 2008 at 2:16 AM, Roland Bock <rbock_at_[hidden] 
> <mailto:rbock_at_[hidden]>> wrote:
> 
>     Hi,
> 
>     I had a similar problem a few weeks ago with catching an exception
>     from boost::threads. It had to do with symbol visibility (I am using
>     the gcc compiler flag -fvisibility=hidden), see
> 
>     http://lists.boost.org/boost-users/2008/09/40268.php (problem
>     solved/circumvented)
>     http://lists.boost.org/boost-users/2008/09/40270.php (additional
>     insight)
> 
>     I have also seen a trac ticket regarding this issue for many parts
>     of boost, including regex:
>     http://svn.boost.org/trac/boost/ticket/2114
> 
> 
>     Regards,
> 
>     Roland
> 
> 
> 
>     Matthew LaCrosse wrote:
> 
>         Yes, I tried that.
> 
> 
>         On Sun, Oct 5, 2008 at 6:32 AM, Boris <boriss_at_[hidden]
>         <mailto:boriss_at_[hidden]> <mailto:boriss_at_[hidden]
>         <mailto:boriss_at_[hidden]>>> wrote:
> 
>            On Sun, 05 Oct 2008 01:45:11 +0200, Matthew LaCrosse
>            <mlacrosse3_at_[hidden] <mailto:mlacrosse3_at_[hidden]>
>         <mailto:mlacrosse3_at_[hidden] <mailto:mlacrosse3_at_[hidden]>>> wrote:
> 
>                It's not catching the exception in the C++ code. Could
>         this just
>                having
>                something do with using the std::string class for the
>         regex inputs?
> 
> 
>            I've no idea why a C++ exception shouldn't be caught in C++ code.
>            Did you try catch(...) to test if this works at least?
> 
> 
>            Boris
> 
>                [...]
> 
> 
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