Re: [Cppcms-users] Segmentaion fault occurs to booster::aio::io_service running in booster::thread

[Marcel H. <ke...@co...>]

I'm not entirely sure, but don't you need something like '-pthread' to
use threads in a unix environment. Try that out.



On 05/08/2016 04:04 PM, CN wrote:
> File "t.cpp":
> 
> #include <booster/aio/io_service.h>
> #include <cppcms/service.h>
> #include <boost/bind.hpp>
> #include <booster/shared_ptr.h>
> #include <booster/log.h>
> #include <signal.h>
> booster::shared_ptr<cppcms::service> this_cppcms_service;
> static int caught_signal=-1;
> 
> void signal_handler(int signal_number)
> {
> 	BOOSTER_DEBUG("begin handler");
> 	caught_signal=signal_number;
> 	this_cppcms_service->shutdown();
> 	BOOSTER_DEBUG("end handler");
> }
> 
> class my_class {
> private:
> 	booster::aio::io_service io_service;
> public:
> 	void start(){
> 		io_service.run();
> 	}
> 	void stop(){
> 		io_service.stop();
> 	}
> };
> 
> 
> int main(int argc,char ** argv)
> {
> 	while(true){
> 		try{
> 			this_cppcms_service.reset(new
> 			cppcms::service(argc,argv));
> 			//Install signals catchers.
> 			struct sigaction actions;
> 			memset(&actions,0,sizeof(actions));
> 			actions.sa_handler=signal_handler;
> 			int result;
> 			if(
> 				(result=sigaction(SIGTERM,&actions,NULL))
> 				!= 0
> 				||
> 				(result=sigaction(SIGHUP,&actions,NULL))
> 				!= 0
> 			){
> 				BOOSTER_ERROR("") << "sigaction()
> 				failed";
> 				exit(EXIT_FAILURE);
> 			}
> 			my_class mc;
> 			booster::thread
> 			mc_thread(boost::bind(&my_class::start,&mc));
> 
> BOOSTER_DEBUG("==1==");
> 			this_cppcms_service->run();
> BOOSTER_DEBUG("==2==");
> 			mc.stop(); mc_thread.join();
> BOOSTER_DEBUG("==3==");
> 			if(caught_signal == SIGTERM)
> 				return 0;
> BOOSTER_DEBUG("==4==");
> 			//SIGHUP to reload configurations
> 		}
> 		catch(std::exception const &e){
> 			BOOSTER_ERROR("") << e.what();
> 			return 1;
> 		}
> 	}
> 	return 0;
> }
> 
> ----------
> 
> File "t.js":
> 
> {
> 	"service" : {
> 		"api" : "fastcgi",
> 		"socket" : "/tmp/t.sock",
> 		"disable_global_exit_handling":true
> 	},
> 	"daemon":{
> 		"enable":true,
> 		"lock":"/tmp/t.pid"
> 	},
> 	"logging" : {
> 		"level" : "debug",
> 		"stderr" : false,
> 		"syslog" : {
> 			"enable":true,
> 			"id" : "t"
> 		}
> 	}
> }
> 
> --------
> 
> Commands issued:
> 
> cd /tmp
> g++ -lbooster -lcppcms -lboost_system t.cpp
> ./a.out -c t.js
> kill -TERM `cat t.pid`
> 
> --------
> 
> File "/var/log/syslog":
> 
> May  8 21:36:13 host t: ==1==:  (t.cpp:51)
> May  8 21:36:36 host t: begin handler:  (t.cpp:12)
> May  8 21:36:36 host t: end handler:  (t.cpp:15)
> May  8 21:36:36 host t: ==2==:  (t.cpp:53)
> May  8 21:36:36 host kernel: a.out[5146]: segfault at b5b5dba8 ip
> b715205e sp bfad0620 error 4 in libpthread-2.19.so[b714a000+18000]
> 
> 
> With this simple code, I get segfault at "mc.stop(); mc_thread.join();"
> after issuing command "kill -TERM <pid>". Would someone please enlighten
> me why?
> 
> Best regards,
> CN
>