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TAO Corba client crash

Hi,
I wrote a simple client/server based on the chat example in the tao/examples/simple/chat directory, using ACE-6.0.0 win32.
The client seems to run fine, but when main ends as it's running its destructors it crashes on an access violation at

Line 33 in leader_follower.cpp

  if ( this->orb_core_->gui_resource_factory () )
    this->orb_core_->gui_resource_factory ()->reclaim_reactor (this->reactor_);

I'm not sure if its relevant but my client access is done through a secondary class that's instantiated from a dll. So the orb init code resides in the dll too.
This is my basic initialization code in the dll:

        int argc;
        ACE_TCHAR** argv = CommandLineToArgvA(GetCommandLine(), &argc);
       
        orb_ = CORBA::ORB_init (argc, argv);
       
        // Open the file for reading.
        ACE_HANDLE f_handle = ACE_OS::open (ior_filename, 0);

        if (f_handle != ACE_INVALID_HANDLE) {

            ACE_Read_Buffer ior_buffer (f_handle);
            char *data = ior_buffer.read ();

            if (data != 0) {
                CORBA::Object_var server_object =
                    orb_->string_to_object (data);
                __symbols = Symbols::_narrow (server_object.in ());
                if (!CORBA::is_nil (__symbols.in ())) __order_sync_init_successful=true;
            }
            ior_buffer.alloc ()->free (data);
            ACE_OS::close (f_handle);
        }
       
and this is the final code:
        orb_ ->shutdown();
Avatar of trinitrotoluene
trinitrotoluene
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this shouldn't be too difficult to isolate since its in the destructor it most definitely is because something has already been released or invalidated or maybe not even initialized.

if you have access to a debugger place a breakpoint before the place where it is crashing and check which pointer is going NULL


otherwise do the following. check my code snippet below. I'm just checking for NULL so that you can isolate the problem further




[i] if ( this->orb_core_->gui_resource_factory () )
    this->orb_core_->gui_resource_factory ()->reclaim_reactor (this->reactor_);
[/i]

//modify your code as below to check for null

if(this){
if(this->core!=NULL){
if(this->orb_core_->gui_resource_factory () != NULL){
this->orb_core_->gui_resource_factory ()->reclaim_reactor (this->reactor_);
}
}
}

    
[/i]

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ofcourse if you don't have a debugger then insert a few log statements to help you with the flow and the crash location
ASKER CERTIFIED SOLUTION
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ASKER

I figured it out myself and that was the reason.