Re: GDB does not stop in breakpoint!

["A. Soare" <alinsoar@voila.fr>]

>     3       breakpoint     keep y   0x081fc176 in funcall_lambda at eval.c:3147
>         stop only if EQ(XCDR(XCAR(arg_vector[0])),Qx)
>         breakpoint already hit 411 times
> 
> 
>     It stops even if XCDR(XCAR(arg_vector[0])) != 'x
> 
> I did not know it was possible to use C macros in GDB.
> But if that does work now, I do not see why this condition would fail
> to work correctly.

The protocol of communication between the debugger and the executable is dwarf for C language. When one create the executable, it must be created following this protocol for gdb to be able to debug.

There is a flag to gcc to add options such that  gdb can render macros. 

> 
> But it is clear that that fails to verify whether arg_vector[0]
> is a cons cell.  So it will sometimes match objects that are the
> wrong type.
> 
> Therefore, it is certain that this
> 
>     cond 3 (CONSP(arg_vector[0]) && CONSP(XCAR(arg_vector[0])) &&
>     EQ(XCAR(XCAR(arg_vector[0])),Qx))
> 

yes, i am required to check.




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