general fault exception

**chintugavali** · 04-25-2008

hi, i have one dll in which i have written following function. I am calling this DLL from some othere code. tool runs fine but while updating , it gives error as general fault exception. Can anyone please tell me what is the problem?

Code:

extern DllExport int GetStationCurveData( UF_KF_value_t *in, int num, UF_KF_value_t *out )
{
	void getvalue( SPOT spot, char *spot_str, char *instance, float *val );

	char	*GDSVolumeName = NULL;	
	char	*regionName = NULL;
	char	*geomName = NULL;
	char	 geomLocation[ GDS_LOCATION_SIZE ] = "";
	char     msg[256]="";
	
    float STAN_val[256];
	

	int	retVal = 0;
	int i,x;
	int n=0;
	int	maxNbr = 0;
	int no=0;
	int	maxNbr_R = 0;
	int	maxNbr_Z= 0;
	//int	nbr = 0;
	int arraysize;
	int	numPoints = 0;
	//int	mode = -1;
	int numPoints_R =0;
	int numPoints_Z =0;	



   ////////////////////////////////////////////////////////////////////////////////////////////////////
   //          strcture for storing "R" & "Z" values for corrusponding stations                      //
   //                                                              :Rajesh Gavali					 //
   ////////////////////////////////////////////////////////////////////////////////////////////////////

	struct StaData
	{
		float RVAL[256];
		float ZVAL[256];
	};
	
	struct StaData ST1[256];
	
	SPOT	iSPOT = NULL;

	/////////////////////////////////////////////////////
	//	KF DATA										   //
	/////////////////////////////////////////////////////

	UF_KF_value_p_t  ST_kf_value;
	UF_KF_value_p_t  R_kf_value;
	UF_KF_value_p_t  Z_kf_value;
	UF_KF_value_p_t  nos_kf_value;
	UF_KF_value_p_t  noZ_kf_value;	


	UF_KF_value_p_t  Station_List_value;
	UF_KF_value_p_t	point = NULL;
	UF_KF_value_p_t	listValue = NULL;

	UF_KF_list_p_t list = NULL;


	UF_KF_list_p_t Station_Name_list = NULL;
	UF_KF_list_p_t R_Val_list = NULL;	
	UF_KF_list_p_t Z_Val_list = NULL;	
//////////////////////////////////////////////////////////
	if(num==1)
	{
		PrintToInfoWindow( "\nInputs are correct!\n");	
	}
	else 
	{
		PrintToInfoWindow( "\nInputs are incorrect!\n");
	}
	
	retVal = UF_initialize();

	if( retVal )
	{
		PrintToInfoWindow("Failed\n");
		sprintf( infoMsg, "UF_initialize() failed\n" );
		ReturnBadList( out );
		return -1;
	}	
	
	UF_KF_ask_string( in[0], &GDSVolumeName );	
	
	retVal = OpenGDS( GDSVolumeName );

	if( retVal )
	{
		PrintToInfoWindow("Failed\n");
		sprintf( infoMsg, "to open GDS Volume\n" );
		ReturnBadList( out );
		UF_terminate();
		return -1;
	}
	if( GDSSpot == NULL )
	{
		PrintToInfoWindow("Failed\n");
		sprintf( infoMsg, "SPOT is not set to GDS Volume\n" );
		PrintToInfoWindow( infoMsg );
		ReturnBadList( out );
		UF_terminate();
		return -1;
	}
	iSPOT = GDSSpot;	

	sprintf( geomLocation, "Cafmix.Cafd.Rec1" );

    retVal = idsspot_set( &iSPOT, geomLocation, strlen( geomLocation ) );

	if(retVal)
	{
		PrintToInfoWindow("cant set spot to Cafmix.Cafd.Rec1");
	}

	numPoints = ids_getnbr( &iSPOT, "STAN", strlen("STAN "));

	if( numPoints <= 0 )
	{
		PrintToInfoWindow("Failed\n");
		PrintToInfoWindow("Failed to get No. of Control points\n");
		ReturnBadList( out );
		UF_terminate();
		return -1;
	}
	
	maxNbr = numPoints;	

   ////////////////////////////////////////////////////////////////////////////////////////////////////
   //          we are getting corresponding "STATION NUMBERS" from this function                     //
   //                                                               :Rajesh Gavali					 //
   ////////////////////////////////////////////////////////////////////////////////////////////////////

    x=ids_getreal(&iSPOT,"STAN",&nbr,STAN_val,&maxNbr,strlen("STAN" ));

    if(x)
	{
	  PrintToInfoWindow( "not getting array data" );
	}
	sprintf( infoMsg, "\nstation numbers are :\n");
	PrintToInfoWindow( infoMsg );

	for(arraysize=0;arraysize<maxNbr;arraysize++)
	{
		sprintf( infoMsg, " \n%d]%f\n",arraysize,STAN_val[arraysize]);
		PrintToInfoWindow( infoMsg );
	}

   ////////////////////////////////////////////////////////////////////////////////////////////////////
   //        From this loop we are getting corresponding "R" values for each station curves          //
   //                                                                         :Rajesh Gavali		 //
   ////////////////////////////////////////////////////////////////////////////////////////////////////

   sprintf(geomLocation,":Cafmix.Cafd.Sta<%f>",STAN_val[0]);

   retVal = idsspot_set( &iSPOT, geomLocation, strlen( geomLocation ) );

	if(retVal)
	{
		PrintToInfoWindow("cant set spot to Cafmix.Cafd.Rec1");
	}

   maxNbr_R  = ids_getnbr(&iSPOT, "R", strlen("R "));

	if(  maxNbr_R <= 0 )
	{
		PrintToInfoWindow("Failed\n");
		PrintToInfoWindow("Failed to get No. of Control points\n");
		ReturnBadList( out );
		UF_terminate();
		return -1;
	}else
	{
		sprintf(geomLocation,"\nNO. OF R VALUES=%d\n",maxNbr_R);
		PrintToInfoWindow(geomLocation);	
	}

    sprintf( infoMsg, "\nR values  are :\n");
	PrintToInfoWindow( infoMsg );

	for(arraysize=0;arraysize<maxNbr;arraysize++)
	{
	   sprintf(geomLocation,":Cafmix.Cafd.Sta<%f>.R",STAN_val[arraysize]);
	   PrintToInfoWindow(geomLocation);	   
	   
	   retVal = ids_getreal(&iSPOT ,geomLocation,&nbr,ST1[arraysize].RVAL,&maxNbr_R,strlen( geomLocation ));
	   
	   for( i=0;i< maxNbr_R;i++)
	   {
		   sprintf( infoMsg, "\n%d]%f\n",i,ST1[arraysize].RVAL[i]);
		   PrintToInfoWindow( infoMsg );
	   }
   }   
   ////////////////////////////////////////////////////////////////////////////////////////////////////
   //        From this loop we are getting corresponding "Z" values for each station curves          //
   //                                                                         :Rajesh Gavali		 //
   ////////////////////////////////////////////////////////////////////////////////////////////////////

   sprintf(geomLocation,":Cafmix.Cafd.Sta<%f>",STAN_val[0]);

   retVal = idsspot_set( &iSPOT, geomLocation, strlen( geomLocation ) );

   if(retVal)
	{
		PrintToInfoWindow("cant set spot to Cafmix.Cafd.Rec1");
	}
	
	maxNbr_Z  = ids_getnbr(&iSPOT, "Z", strlen("Z"));

	if(  maxNbr_Z <= 0 )
	{
		PrintToInfoWindow("Failed\n");
		PrintToInfoWindow("Failed to get No. of Control points\n");
		ReturnBadList( out );
		UF_terminate();
		return -1;
	}else
	{
		sprintf(geomLocation,"\nNO. OF Z VALUES=%d\n",maxNbr_Z);
		PrintToInfoWindow(geomLocation);	
	}

    sprintf( infoMsg, "\nZ values  are :\n");
	PrintToInfoWindow( infoMsg );

    for(arraysize=0;arraysize<maxNbr;arraysize++)
   {
	   sprintf(geomLocation,":Cafmix.Cafd.Sta<%f>.Z",STAN_val[arraysize]);
	   PrintToInfoWindow(geomLocation);

	   
	   retVal = ids_getreal(&iSPOT ,geomLocation,&nbr,ST1[arraysize].ZVAL,&maxNbr_Z,strlen( geomLocation ));
	   
	   for( i=0;i<maxNbr_Z ;i++)
	   {
		   sprintf( infoMsg, "\n%d]%f\n",i,ST1[arraysize].ZVAL[i]);
		   PrintToInfoWindow( infoMsg );
	   }
   }
   for(arraysize=0;arraysize<maxNbr;arraysize++)
	{		
	   UF_KF_make_number (STAN_val[arraysize],&ST_kf_value );
	   UF_KF_list_push(list ,ST_kf_value, &list );
	}	
	for(arraysize=0;arraysize<maxNbr;arraysize++)
	{
		for( i=0;i<maxNbr_R ;i++)
		{
			UF_KF_make_number (ST1[arraysize].RVAL[i],& R_kf_value);
			UF_KF_list_push( list  , R_kf_value, &list );
		}
		for( i=0;i<maxNbr_Z;i++)
		{
			UF_KF_make_number (ST1[arraysize].ZVAL[i],& Z_kf_value);
			UF_KF_list_push(list,Z_kf_value,&list);
		}
	} 
	UF_KF_make_number (maxNbr,& nos_kf_value); 
	UF_KF_list_push(list, nos_kf_value,&list);
    UF_KF_make_number (maxNbr_Z,&noZ_kf_value);
	UF_KF_list_push(list,noZ_kf_value,&list);

    UF_KF_make_list(list,out); 

CloseGDS();

//free();
return 0;
}

**brewbuck** · 04-25-2008

Originally Posted by chintugavali

hi, i have one dll in which i have written following function. I am calling this DLL from some othere code. tool runs fine but while updating , it gives error as general fault exception. Can anyone please tell me what is the problem?

What LINE is causing the error? A debugger will tell you this information.

**chintugavali** · 04-25-2008

problem is i cant debug because i am calling it from one tool, & only place i can check is in the tool ouptitself

**brewbuck** · 04-25-2008

Originally Posted by chintugavali

problem is i cant debug because i am calling it from one tool, & only place i can check is in the tool ouptitself

Try adding print statements to see generally what area is crashing -- once you know the general area, add more detailed print statements in that area to narrow it down further, etc.

**chintugavali** · 04-25-2008

i am getting error while run time.... how can i debug any error from printf in this case?

**brewbuck** · 04-25-2008

Originally Posted by chintugavali

i am getting error while run time.... how can i debug any error from printf in this case?

If you have something like this:

Code:

printf("1\n");
a();
printf("2\n");
b();
printf("3\n");
c();
printf("4\n");
d();

And you run the program and see:

Code:

1
2
3
<crash>

Then obviously it crashed somewhere between printf("3\n") and printf("4\n"), right?

**matsp** · 04-25-2008

Originally Posted by chintugavali

i am getting error while run time.... how can i debug any error from printf in this case?

it's a method called "printlining". Say we have this code:

Code:

int main()
{
   int x = 0; 
   int y = 3;
   int z;

... bunch of other code ... 

   z = x / y;
   return 0;

We can then debug the "division by zero error" by adding printfs to the code:

Code:

int main()
{
   int x = 0; 
   int y = 3;
   int z;

    printf("At point A\n"); 

... bunch of other code ... 
    printf("At point K\n"); 
    
   z = x / y;
    printf("At point L\n"); 

   return 0;

You will then see output:

Code:

At point A
...
At point K
Division by zero error...

So you know that the problem is between K and L.

If you have no console to print to, you can write to a text-file. As long as it's something that doesn't disappear when your application crashes.

--
Mats

**medievalelks** · 04-26-2008

The time spent debugging would be better spent rewriting with std::string, std::vector, and std:

stringstream instead of char *, arrays, and sprintf. I think 99% of C++'s bad reputation comes from people using it like C.

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