Re: [Qemu-devel] [PATCH] fix qemu_malloc() error check for size==0

[Jamie Lokier]

Eduardo Habkost wrote:
> I really hope you are not proposing to make qemu_realloc(p, 0) work but
> qemu_malloc(0) fail, because you would be breaking lots of
> realloc()/malloc() equivalency assumptions.

Careful.

realloc(p, 0) *always* frees p (or does nothing if p == NULL), on all
systems complying with ISO C, and always returns NULL.

malloc(0) on the other hand does not guarantee this,
so malloc(0) is *not* a substitute for realloc(NULL, 0).

-- Jamie