Re: [Qemu-devel] [RFC 1/8] ui/vnc-enc-tight: add abort() for unexpected default

["Alex Bennée" <alex.bennee@linaro.org>]

Paolo Bonzini <pbonzini@redhat.com> writes:

> On 20/09/2016 10:02, Marc-André Lureau wrote:
>> Hi
>>
>> On Mon, Sep 19, 2016 at 7:58 PM Alex Bennée <alex.bennee@linaro.org
>> <mailto:alex.bennee@linaro.org>> wrote:
>>
>>     When enabling the sanitizer build it will complain about control
>>     reaching a non-void function. Normally the compiler should detect that
>>     there is only one possible exit given a static VNC_SERVER_FB_BYTES.
>>
>>     As we should never get here I added an abort() rather than a default
>>     return value.
>>
>>     Signed-off-by: Alex Bennée <alex.bennee@linaro.org
>>     <mailto:alex.bennee@linaro.org>>
>>     ---
>>      ui/vnc-enc-tight.c | 2 ++
>>      1 file changed, 2 insertions(+)
>>
>>     diff --git a/ui/vnc-enc-tight.c b/ui/vnc-enc-tight.c
>>     index 49df85e..9e4d254 100644
>>     --- a/ui/vnc-enc-tight.c
>>     +++ b/ui/vnc-enc-tight.c
>>     @@ -710,6 +710,8 @@ static bool check_solid_tile(VncState *vs, int
>>     x, int y, int w, int h,
>>          switch (VNC_SERVER_FB_BYTES) {
>>          case 4:
>>              return check_solid_tile32(vs, x, y, w, h, color, samecolor);
>>     +    default:
>>     +        abort();
>>          }
>>      }
>>
>>
>>
>> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com
>> <mailto:marcandre.lureau@redhat.com>>
>>
>> Looks fine. Would it make sense to use a
>> G_STATIC_ASSERT(VNC_SERVER_FB_BYTES == 4) above instead?
>
> Or QEMU_BUILD_BUG_ON(VNC_SERVER_FB_BYTES != 4) :)

I'll do that!

>
> Paolo
>
>> --
>> Marc-André Lureau


--
Alex Bennée