On Tue, Mar 24, 2009 at 10:18:08PM +0000, Greg Stark wrote: > On Tue, Mar 24, 2009 at 10:12 PM, Martijn van Oosterhout > <klep...@svana.org> wrote: > > Not really a GCC extension, but you could have the macro check that it > > can take the address of the arguments, which amounts to almost the same > > thing. It only doesn't work on constants. > > No, there are all kinds of complex expressions which are lvalues -- > anything ending in a pointer dereference for example, which is > precisely the most likely kind of expression to introduce seg fault if > something is unexpectedly null
Sorry, I meant to say that the compiler could determine the address at compile time, something like: __builtin_constant_p( !&(__x)) ) Have a nice day, -- Martijn van Oosterhout <klep...@svana.org> http://svana.org/kleptog/ > Please line up in a tree and maintain the heap invariant while > boarding. Thank you for flying nlogn airlines.
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