when it reaches end-of-file (stop=1) segmentation fault

[tvnaidu]

When I reach end-of-file, I gets segmentation fault with below prog, I just read from a file, then print the time stamp, when reaches end-of-file, sets "stop=1", but my program dumps core, any idea?.

TS: 18:58:57:291
TS: 18:58:57:385
TS: 18:58:57:494
TS: 18:58:57:588
TS: 18:58:57:682
TS: 18:58:57:791

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 1077195904 (LWP 6583)]
0x00000000 in ?? ()
(gdb) bt
#0 0x00000000 in ?? ()
(gdb)

int main(int argc, const char * argv[])
{
        time_stamp_t TS;
        DATA_T meta;
        int stop=0;
        int metagen_ptr;

        FileLoaderStart("Receiver.ini");

        while (1) {
                FileLoader(&TS, &meta, &stop,  &metagen_ptr);
                if (stop == 1){
                        return 0;
                }
                printf("TS: %d:%d:%d:%d\n", TS.hourofday, TS. minuteofhour, TS.secofminute, TS.millisec);

                //sleep(1);
        }

        return 0;
}

void FileLoaderStart(char*cfgfile)
{
   char metafilename[50];
   META_DATA_T meta;

        memset(metafilename,'\0',CFG_FILE_NAME_LENGTH);
        htGetParam(cfgfile,"metafilename",metafilename);

        fmetafile=fopen(metafilename,"r");
        if(fmetafile==NULL)return;

        memset(linebuffer,0,81920);

        if(fgets(linebuffer,MAX_LINE_SIZE,fmetafile)==NULL){
                fclose(fmetafile);
                fmetafile=NULL;
                return;
        }

         FileParseOneLine(linebuffer,&pre_TS,&pre_meta);

}



void FileLoader(time_stamp_t* time_stamp, DATA_T* blob_array,int*stop,int*metagen_ptr)
{


        time_stamp_t TS;
        DATA_T meta;
        int blob_index=0;
        DATA_T* blob_ptr=blob_array;

        memset(blob_array,0,sizeof(DATA_T)*MAX_BLOB_NUM);
        *stop=0;




        while(1){
                memset(linebuffer,0,81920);
                if(fgets(linebuffer,MAX_LINE_SIZE,fmetafile)==NULL){
                        fclose(fmetafile);
                        *stop=1;
                        return ;
                }

                MetaFileParseOneLine(linebuffer,&TS,&meta);
                if(pre_TS.year==TS.year &&pre_TS.month==TS.month&&pre_TS.dayofmonth==TS.dayofmonth
            &&pre_TS.hourofday==TS.hourofday&& pre_TS.minuteofhour==TS.minuteofhour&& pre_TS.secofminute==TS.secofminute
                &&pre_TS.millisec==TS.millisec&&blob_index<MAX_BLOB_NUM){



}

[tvnaidu]

I added more prints, segmentation fault coming from main function only, when I check stop == 1 then return, that return causing this violation, but when I reaches EOF, I want to exit the prog.

[tvnaidu]

GDB shows line 61 fgets, any command to view what causes violation?

TS: 18:58:57:791
***EOF ****

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 1077195904 (LWP 9254)]
0x402835aa in fgets () from /lib/tls/libc.so.6
(gdb) bt
#0 0x402835aa in fgets () from /lib/tls/libc.so.6
#

[weaknessforcats]

Ot ook like you are passing the address of:

DATA_T meta;

to your FileLoader function as the address of an array of DATA_T, which it's not.

[tvnaidu]

Thanks, I found it. now it works.