Re: [Qemu-devel] [PATCH] Permit zero-sized qemu_malloc() & friends

[Glauber Costa]

On Tue, Dec 01, 2009 at 12:57:27PM +0000, Paul Brook wrote:
> > You might want to have a 'static uint8_t zero_length_malloc[0]' and
> > return that instead of the magic cookie '1'.  Makes the code more
> > readable IMHO and you'll also have symbol in gdb when debugging qemu.
> 
> Having multiple malloc return the same pointer sounds like a really bad idea.
And why's that?

Keep in mind that *any* dereference over that address is a bug.

Actually, I very much like Gerd's idea to unmap that address, so the bug
won't hide from us in any circumnstances.