Re: GDB behaviour of step/next

[Kevin Buettner]

On Apr 20,  4:30pm, Hiroichi MAKIDA wrote:

> In "main.c" I expand a 'for-loop' in "org.c" and use '#line' to
> associate lines in "main.c" with "org.c"'s.
> 
> "main.c" is compiled with the following command(GCC version is
> 2.95.3). 
>          gcc -g main.c
> 
> -- "main.c" --
> #line 6 "org.c"
>   sum = 0;
> #line 7
>   i = 0;
> #line 7
> loop_top:
> #line 7
>   if (i > 10) {
> #line 7
>     goto next:
> #line 7
>   }
> #line 8
>   sum += i;
> #line 8
>   i++;
> #line 8
>   goto loop_top; 
> next:
> -----------------
> 
> -- "org.c" --
> 6:  sum = 0;
> 7:  for(i=0;i<=10;i++ {
> 8:    sum += i;
> 9:  }
> -------------
> 
> When execute position is line 8(sum += i;) and I execute either 'step'
> or 'next', GDB doesn't stop on line 7(for(i=0;i<10;i++)) but on line
> 8(sum += i;).
> 
> Is this right behaviour?

Yes.  If you wish to step by individual lines in main.c, you will
need to eliminate the #line directives.

Kevin