[PATCH] libstdc++: Add error handler for <stacktrace>

[Jonathan Wakely]

On Wed, 30 Nov 2022 at 11:54, Jonathan Wakely <jwakely@redhat.com> wrote:

>
>
> On Wed, 30 Nov 2022 at 06:04, François Dumont via Libstdc++ <
> libstdc++@gcc.gnu.org> wrote:
>
>> Good catch, then we also need this patch.
>>
>
> Is it worth printing an error? If we can't show the backtrace because of
> an error, we can just print nothing there.
>
> We also need to pass an error handler to the
> __glibcxx_backtrace_create_state call in formatter.h.
>
> Now that I look at this code again, why do we need the _M_backtrace_full
> member? It's always set to the same thing, why can't we just call that
> function directly?
>

Oh right, I remember now ... because otherwise the libstdc++.so library
needs the definition of __glibcxx_backtrace_full.



> And I think we should use threaded=1 for the
> __glibcxx_backtrace_create_state call.
>
> So like the attached patch.
>
>
>