Re: [PATCH 5/5] hw: Remove mentions of NDEBUG

["Michael S. Tsirkin" <mst@redhat.com>]

On Wed, Feb 22, 2023 at 05:11:36PM +0100, Philippe Mathieu-Daudé wrote:
> On 22/2/23 13:05, Michael S. Tsirkin wrote:
> > On Wed, Feb 22, 2023 at 12:25:20AM +0100, Philippe Mathieu-Daudé wrote:
> > > Since commit 262a69f428 ("osdep.h: Prohibit disabling
> > > assert() in supported builds") 'NDEBUG' can not be defined.
> > > 
> > > Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
> > 
> > this exactly says NDEBUG is not allowed. why are you removing this?
> 
> The project can not be built with NDEBUG. There is no point in
> mentioning it in each individual function.

the reason we mention it is because there are security implications
if we don't.

> > > ---
> > >   hw/scsi/mptsas.c   | 2 --
> > >   hw/virtio/virtio.c | 2 --
> > >   2 files changed, 4 deletions(-)
> > > 
> > > diff --git a/hw/scsi/mptsas.c b/hw/scsi/mptsas.c
> > > index c485da792c..5b373d3ed6 100644
> > > --- a/hw/scsi/mptsas.c
> > > +++ b/hw/scsi/mptsas.c
> > > @@ -1240,8 +1240,6 @@ static void *mptsas_load_request(QEMUFile *f, SCSIRequest *sreq)
> > >       n = qemu_get_be32(f);
> > >       /* TODO: add a way for SCSIBusInfo's load_request to fail,
> > >        * and fail migration instead of asserting here.
> > > -     * This is just one thing (there are probably more) that must be
> > > -     * fixed before we can allow NDEBUG compilation.
> > >        */
> > >       assert(n >= 0);
> > > 
> > > diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c
> > > index f35178f5fc..c6b3e3fb08 100644
> > > --- a/hw/virtio/virtio.c
> > > +++ b/hw/virtio/virtio.c
> > > @@ -1898,8 +1898,6 @@ void *qemu_get_virtqueue_element(VirtIODevice *vdev, QEMUFile *f, size_t sz)
> > >       /* TODO: teach all callers that this can fail, and return failure instead
> > >        * of asserting here.
> > > -     * This is just one thing (there are probably more) that must be
> > > -     * fixed before we can allow NDEBUG compilation.
> > >        */
> > >       assert(ARRAY_SIZE(data.in_addr) >= data.in_num);
> > >       assert(ARRAY_SIZE(data.out_addr) >= data.out_num);
> > > -- 
> > > 2.38.1
> >