Program crash after trying to update label in ptlabel

dunno98 · April 5, 2008, 3:50pm

my program crash with the following
Process 626702 (brakeNiNo_NB1207405500342) terminated SIGSEGV code=1 fltno=11 ip=0117e154 mapaddr=00101154. ref=00000014

while a try to change the labe contain.
I am a noob with QNX and this is my first try. Had been look at these error for a long time… hope some one can help me out here.

Thanks!!

The code are:


/* Y o u r   D e s c r i p t i o n                       */
/*                            AppBuilder Photon Code Lib */
/*                                         Version 2.03  */

/* Standard headers */
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <pthread.h>
#include <sys/wait.h>

/* Local headers */
#include "ablibs.h"
#include "abimport.h"
#include "proto.h"


#define action1 "Brake - Moderate Braking."
#define action2 "Brake - Fully Engage."
#define action3 "Brake - No Braking"
#define action4 "Accelerator - Disable."
#define action5 "Accelerator - User Control."
#define action6 "System error!!!."

extern int thread_ID;

double d[22];// = {2.0,1.9,1.8,1.7,1.6,1.5,1.4;
double s[22];
char cd[10];
char cs[10];
char note[40];
char uc;
char rm;
int i,p,j;

void* function( void* arg )
{
//printf( "This is thread %d\n", pthread_self() );
		d[0] = 2.0;
        s[0] = 12.0;
       
        d[1] = 1.9;
        s[1] = 11.0;
       
        d[2] = 1.8;
        s[2] = 10.5;
       
        d[3] = 1.7;
        s[3] = 10.0;
       
        d[4] = 1.6;
        s[4] = 9.9;
       
        d[5] = 1.5;
        s[5] = 9.8;
       
        d[6] = 0.8;
        s[6] = 9.7;
       
        d[7] = 0.5;
        s[7] = 8.9;
       
        d[8] = 0.5;
        s[8] = 8.8;
       
        d[9] = 0.5;
        s[9] = 8.8;
       
        d[10] = 0.6;
        s[10] = 8.7;
       
        d[11] = 0.6;;
        s[11] = 8.6;;
       
        d[12] = 0.5;
        s[12] = 8.5;
       
        d[13] = 0.5;
        s[13] = 8.4;
       
        d[14] = 0.4;
        s[14] = 9.2;
       
        d[15] = 0.3;
        s[15] = 8.0;
       
        d[16] = 0.3;
        s[16] = 8.0;
       
        d[17] = 0.3;
        s[17] = 7.0;
       
        d[18] = 0.2;
        s[18] = 6.0;
       
        d[19] = 0.1;
        s[19] = 5.0;
        
        d[20] = 0.0;
        s[20] = 0.0;
        
        d[21] = 0.0;
        s[21] = 0.0;
        

        	for (i=0;i<20;i++){
        	sprintf(cs, "%2.1f",s[i]);
			sprintf(cd, "%2.1f",d[i]);

	       	///PtSetResource( ABW_Ptlbl_Speed, Pt_ARG_TEXT_STRING,cs, 0);
	       	//PtSetResource( ABW_Ptlbl_Dist, Pt_ARG_TEXT_STRING,cd, 0);
	       	if (d[i]>=1.0 && s[i]>=10.0)
                {
                		
                		PtSetResource( ABW_Ptlbl_Speed, Pt_ARG_TEXT_STRING,cs, 0);
				        PtSetResource( ABW_Ptlbl_Dist, Pt_ARG_TEXT_STRING,cd, 0);
				        PtSetResource( ABW_Ptlbl_N1, Pt_ARG_TEXT_STRING,action1, 0);
				        PtSetResource( ABW_Ptlbl_N2, Pt_ARG_TEXT_STRING,action4, 0);
                }
                else if(d[i]>1.0 && s[i]<10.0)
                {
                		PtSetResource( ABW_Ptlbl_Speed, Pt_ARG_TEXT_STRING,cs, 0);
				        PtSetResource( ABW_Ptlbl_Dist, Pt_ARG_TEXT_STRING,cd, 0);
				        PtSetResource( ABW_Ptlbl_N1, Pt_ARG_TEXT_STRING,action3, 0);
				        PtSetResource( ABW_Ptlbl_N2, Pt_ARG_TEXT_STRING,action5, 0);
                }      
                else if(d[i]>= 0.5 &&  d[i]<= 1.0)
                {
                		PtSetResource( ABW_Ptlbl_Speed, Pt_ARG_TEXT_STRING,cs, 0);
				        PtSetResource( ABW_Ptlbl_Dist, Pt_ARG_TEXT_STRING,cd, 0);
				        PtSetResource( ABW_Ptlbl_N1, Pt_ARG_TEXT_STRING,action1, 0);
				        PtSetResource( ABW_Ptlbl_N2, Pt_ARG_TEXT_STRING,action4, 0);
                }
                else if(d[i] > 0.2 && d[i]< 0.5)
                {
                		PtSetResource( ABW_Ptlbl_Speed, Pt_ARG_TEXT_STRING,cs, 0);
				        PtSetResource( ABW_Ptlbl_Dist, Pt_ARG_TEXT_STRING,cd, 0);
				        PtSetResource( ABW_Ptlbl_N1, Pt_ARG_TEXT_STRING,action2, 0);
				        PtSetResource( ABW_Ptlbl_N2, Pt_ARG_TEXT_STRING,action4, 0);

                }
                else if(d[i] < 0.2)
                {
                		PtSetResource( ABW_Ptlbl_Speed, Pt_ARG_TEXT_STRING,cs, 0);
				        PtSetResource( ABW_Ptlbl_Dist, Pt_ARG_TEXT_STRING,cd, 0);
				        PtSetResource( ABW_Ptlbl_N1, Pt_ARG_TEXT_STRING,action2, 0);
				        PtSetResource( ABW_Ptlbl_N2, Pt_ARG_TEXT_STRING,action4, 0);
                }
                else
                {
                		PtSetResource( ABW_Ptlbl_Speed, Pt_ARG_TEXT_STRING,cs, 0);
				        PtSetResource( ABW_Ptlbl_Dist, Pt_ARG_TEXT_STRING,cd, 0);
				        PtSetResource( ABW_Ptlbl_N1, Pt_ARG_TEXT_STRING,action6, 0);
				        PtSetResource( ABW_Ptlbl_N2, Pt_ARG_TEXT_STRING,action6, 0);
                }*/
                //delay(20);
                //for ( p=0; p<200000; p++){
                	//for( j=0; j<200; j++){}
                //}
                //sleep(1);
                //for ( p=0; p<1000; p++){}
                /*for (j=0; p<10; p++){
                	cs[i] = NULL;
                	cd[i]=NULL;
           
                }
	       	//cs="";
	       	//cd="";
	       
        	}
        	while(1){}
	       	
return( 0 );
}
int
toggle( PtWidget_t *widget, ApInfo_t *apinfo, PtCallbackInfo_t *cbinfo )
{

	/* eliminate 'unreferenced' warnings */
	widget = widget, apinfo = apinfo, cbinfo = cbinfo;
	
	////printf("This is a test msg \n");
	//PtSetResource( ABW_PtLabel1, Pt_ARG_TEXT_STRING,"1.00", 0);
	pthread_create(&thread_ID, NULL, &function, NULL); 
	//while(1);
	return( Pt_CONTINUE );
	
	}

maschoen · April 5, 2008, 6:01pm

Since the code cannot compile, it would be premature to say what is wrong. Often such errors are based on simple mistakes. Having someone look over your shoulder is a good idea, but if you don’t show them the actual code that is failing, it is pointless.

dunno98 · April 5, 2008, 6:08pm

the code can be compile and running on my board
just that after i init the thread the program will crash
i wasn’t sure it is ok to use thread in this way.
but it seem a delay in the thread had cause the program to crash

dunno98 · April 5, 2008, 6:50pm

I had solve the problem.
It seem that I need to Flush the display using PtFlush as the display does not update itself.

Thanks for viewing

maschoen · April 5, 2008, 9:13pm

Of course it can’t. Take a close look. You have an unmatched comment close */ after the last PtSetResource().

In addition, if PtFlush solves the problem, then you are in bigger trouble than you know. There is no predictable reason why this should fix a crash, nor why it’s lack should cause one.

You don’t seem to know why your loop doesn’t make any sense, so you probably need to understand how the widget library works a little better. Just trying to be helpful.