Re: [Cppcms-users] Segmentation fault

[Artyom <art...@ya...>]

I hadn't reproduced the crash bug, but there is other but that seems to be 
related,
I'm working on it that may cause the crash.

Also can you send me the backtrace of the crash?

You can do it with gdb this way:
Compile with "-g" switch and then in gdb

> r -c config.js
--- Observer Crash
> bt
..... this is trace


Artyom


----- Original Message ----
> From: Mario Palomo <mp...@us...>
> To: cpp...@li...
> Sent: Wed, October 20, 2010 7:30:07 PM
> Subject: [Cppcms-users] Segmentation fault
> 
> Hello,
> 
> I'm starting to use CppCMS ("cppcms-0.99.3.tar.bz2" downloaded  from 
> SourceForge), and noticed that when generating very long responses, the 
> executable ends with a segfault. I am using the built-in server, and I  reduced 
>
> the code to the  following:
> 
> ______________________________________________________________________________
> /*
>     bench.cpp
> */
> #include <cppcms/application.h>
> #include  <cppcms/applications_pool.h>
> #include  <cppcms/service.h>
> #include <cppcms/http_response.h>
> #include  <iostream>
> 
> class bench : public  cppcms::application
> {
> public:
>    bench(cppcms::service &srv) :  cppcms::application(srv) { }
> 
>    virtual void main(std::string  url)
>    {
>      for (int i=0; i < 100000; ++i)  {
>        response().out() << i << "\n";
>       }
>    }//main
> };//class bench
> 
> int main(int argc, char  *argv[])
> {
>    try {
>      cppcms::service srv(argc,  argv);
>       srv.applications_pool().mount(cppcms::applications_factory<bench>());
>       srv.run();
>    }
>    catch (const std::exception &e)  {
>      std::cerr << e.what() << std::endl;
>     }
> 
>    return  0;
> }//main
> ______________________________________________________________________________
> 
> ______________________________________________________________________________
> /*
>     config.js
> */
> {
>    "service": {
>      "api":  "http",
>      "port": 8080,
>    },
>    "http":  {
>      "script_names": [ "/bench" ],
>     },
> }
> ______________________________________________________________________________
> 
> 
> I  start the application:
> 
>    $ ./bench -c config.js
> 
> Then, I use  "curl" to make a request:
> 
>    $ curl  http://localhost:8080/bench
> 
> And the application ("bench") terminates with  a segmentation fault.
> 
> A backtrace shows that the last statement that is  executed is the line 476 of 

> file "cgi_api.cpp" ('write_some()' in function  'connection::write()'), but so 

> far I have not gotten more  information.
> 
> Can anyone else reproduce the problem? Can be solved if I  use the latest 
> version in SVN? (I'll try to test soon with the latest  version of the code).
> 
> Thank you for creating something as awesome as  CppCMS.  Regards,
> 
> Mario
> 
> 
> 
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