Re: Socket PDU (TCP Server) crashes

[Marcus Müller]

Hi Moses,

if it's a bug in the source code of GNU Radio, you'll have to update
that piece of GNU Radio, right?
So, "can't update GNU Radio" isn't a very promising point to start from.
So, what exactly can you and can you not do to your GNU Radio installation?

Does the same code (or even better, a Minimum Reproducible Example) work
on a different machine with GNU Radio 3.7.14.0?

Cheers,
Marcus

On 24.03.20 10:47, Moses Browne Mwakyanjala wrote:
> Hello everyone,
> I'm running a GNU Radio program in standalone C++ application. I
> experience something strange with the Socket PDU block. 
> In a header file, the Socket PDU object is declared as follows:
> 
> gr::blocks::socket_pdu::sptrm_TCPServer;
> 
> and in the implementation file, the object is initialized like this:
> 
> m_TCPServer=gr::blocks::socket_pdu::make("TCP_SERVER","127.0.0.1","2001");
> 
> Tracing the debugger output, the SIGSEGV signal is triggered by the 
> reactive_socket_service_base::destroy(...) function. In particular, the 
> debugger points to the
> 
> reactor_.deregistor_descriptor(..) function.
> 
> 
> All help is warmly welcomed.
> 
> 
> DISCLAIMER: The program is run on a machine with an old version of GNU
> Radio (3.7.11.1), which can't be updated (for security reasons).
> 
> 
> Regards,
> 
> Moses. 
> 
> voidreactive_socket_service_base::destroy( 
> reactive_socket_service_base::base_implementation_type&impl)
> 
> {
> 
> if(impl.socket_!=invalid_socket)
> 
> 
> {
> 
> BOOST_ASIO_HANDLER_OPERATION(("socket",&impl,"close"));
> 
> reactor_.deregister_descriptor(impl.socket_,impl.reactor_data_,=====>
> Debugger points to this line
> 
> (impl.state_&socket_ops::possible_dup)==0);
> 
> boost::system::error_codeignored_ec;
> 
> socket_ops::close(impl.socket_,impl.state_,true,ignored_ec);
> 
> }
> 
> }
> 
> 
> DEBUGGER OUTPUT
> 
> ---------------
> 
> 1   boost::asio::detail::reactive_socket_service_base::destroy                
>                                                                               
>         reactive_socket_service_base.ipp 87   0x7ffff64c9baf 
> 2   boost::asio::socket_acceptor_service<boost::asio::ip::tcp>::destroy       
>                                                                               
>         socket_acceptor_service.hpp      137  0x7ffff64c9e8a 
> 3   
> boost::asio::basic_io_object<boost::asio::socket_acceptor_service<boost::asio::ip::tcp>>::~basic_io_object
>                                                       basic_io_object.hpp     
>          124  0x7ffff64c9e8a 
> 4   boost::asio::basic_socket_acceptor<boost::asio::ip::tcp, 
> boost::asio::socket_acceptor_service<boost::asio::ip::tcp>>::~basic_socket_acceptor
>                     basic_socket_acceptor.hpp        55   0x7ffff64c9e8a 
> 5   
> boost::checked_delete<boost::asio::basic_socket_acceptor<boost::asio::ip::tcp,
>  boost::asio::socket_acceptor_service<boost::asio::ip::tcp>>>                 
>     checked_delete.hpp               34   0x7ffff64c9e8a 
> 6   
> boost::detail::sp_counted_impl_p<boost::asio::basic_socket_acceptor<boost::asio::ip::tcp,
>  boost::asio::socket_acceptor_service<boost::asio::ip::tcp>>>::dispose 
> sp_counted_impl.hpp              78   0x7ffff64c9e8a 
> 7   boost::detail::sp_counted_base::release                                   
>                                                                               
>         sp_counted_base_gcc_x86.hpp      146  0x7ffff64c203a 
> 8   boost::detail::sp_counted_base::release                                   
>                                                                               
>         sp_counted_base_gcc_x86.hpp      144  0x7ffff64c5cfd 
> 9   boost::detail::shared_count::~shared_count                                
>                                                                               
>         shared_count.hpp                 443  0x7ffff64c5cfd 
> 10  
> boost::shared_ptr<boost::asio::basic_socket_acceptor<boost::asio::ip::tcp, 
> boost::asio::socket_acceptor_service<boost::asio::ip::tcp>>>::~shared_ptr     
>        shared_ptr.hpp                   323  0x7ffff64c5cfd 
> 11  gr::blocks::socket_pdu_impl::socket_pdu_impl                              
>                                                                               
>         socket_pdu_impl.cc               45   0x7ffff64c5cfd 
> 12  gr::blocks::socket_pdu::make                                              
>                                                                               
>         socket_pdu_impl.cc               38   0x7ffff64c6132 
> 13  StandardTTC::createFlowgraph                                              
>                                                                               
>         standardttc.cpp                  1006 0x427807       
> 14  StandardTTC::startDevice                                                  
>                                                                               
>         standardttc.cpp                  405  0x421510       
> 15  StandardTTC::qt_static_metacall                                           
>                                                                               
>         moc_standardttc.cpp              63   0x49df41       
> 16  QMetaObject::activate(QObject *, QMetaObject const *, int, void * *)      
>                                                                               
>                                               0x7ffff3fc2f80 
> 17  QAbstractButton::toggled(bool)                                            
>                                                                               
>                                               0x7ffff4b803e2 
> 18  QAbstractButton::setChecked(bool)                                         
>                                                                               
>                                               0x7ffff48b712d 
> 19  ??                                                                        
>                                                                               
>                                               0x7ffff48b6cd3 
> 20  QAbstractButton::mouseReleaseEvent(QMouseEvent *)                         
>                                                                               
>                                               0x7ffff48b6e24 
> ... <More>                                                                    
>                                                                               
>                                                              
> 
>