Re: [Boost-users] Catching boost::thread_interrupted

Subject: Re: [Boost-users] Catching boost::thread_interrupted
From: Roman Perepelitsa (roman.perepelitsa_at_[hidden])
Date: 2008-09-08 15:04:07

2008/9/8 Dr. Roland Bock <rbock_at_[hidden]>

> Peter,
>
> a) virtual destructor: did not change anything
> b) using static libraries: works fine!
>
> Hm. I have not had such a problem before and I we are using quite a few
> shared objects that throw exception which are caught elsewhere.
>
> Maybe this is related to nm not seeing any symbols?
>
> $ nm lib/libboost_thread-gcc42-mt-1_36.so.1.36.0
> nm: lib/libboost_thread-gcc42-mt-1_36.so.1.36.0: no symbols
>
> We are using the gcc option -fvisibility=hidden for our own projects and we
> require to specify classes or functions which we explicitly want to be
> exported by shared objects by putting DSOEXPORT in front of the classname.
> It is defined in the following way:
>
> #ifdef _MSC_VER
>   #ifdef BUILDING_DSO
>      #define DSOEXPORT __declspec(dllexport)
>   #else
>      #define DSOEXPORT __declspec(dllimport)
>   #endif
>   #define DSOLOCAL
> #else
>   #define DSOEXPORT __attribute__ ((visibility("default")))
>   #define DSOLOCAL __attribute__ ((visibility("hidden")))
> #endif
>
> Exceptions declared and thrown in shared objects have to use DSOEXPORT in
> order to be catched elsewhere.
>

Boost does not use __attribute__ ((visibility("default"))), therefore
typeinfo for exceptions is not exported and you can't catch exceptions
thrown by boost.

Roman.

>
> Regards,
>
> Roland
>
>
>
>
> Peter Dimov wrote:
>
>> $ ./src/BoostThreads
>>> Thread 0x60b050 caught something else
>>> Thread 0x60b3e0 caught something else
>>>
>>
>> ...
>>
>>         libboost_thread-gcc42-mt-1_36.so.1.36.0 =>
>>>
>>
>> Can you try the same test with the static Boost.Threads library? Maybe
>> your configuration doesn't support catching non-polymorphic exceptions
>> thrown across .so boundaries. You could also try adding a virtual destructor
>> to thread_interrupted.
>> _______________________________________________
>> Boost-users mailing list
>> Boost-users_at_[hidden]
>> http://lists.boost.org/mailman/listinfo.cgi/boost-users
>>
>
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