On 09 Jan 2011, at 17:56, Joost van der Sluis wrote: > I've done some more tests with -gw2. 'p classinstance' gives you the > address of the class-instance and not the values within the class. > That's a big issue to me. To show the class, you have to use 'p > classinstance^', which is nonsense in a Pascal-way of view. > > And if the classinstance is nil it shows '0x0' and not 'nil'. 'p > @classinstance' will give you rubbish.
It presumably gives you the address of the class instance pointer. It's the same in a plain Pascal program: @classinstance gives you the address in memory where the class instance pointer is located, and classinstance is the pointer (not the fields). > Otoh, with gw3, this all works. The patch to show 'nil' when a class is > not assigned for gdb is two lines. And to be honest, I think the 'p > classinstance1=classinstance2' case is a real corner-case. I think that giving the class instance pointer for "p @classinstance" is quite counterintuitive. And at least I use class instance pointers a lot during debugging the compiler (for conditional breakpoints during reruns). Jonas_______________________________________________ fpc-devel maillist - fpc-devel@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-devel
