Re: [Qemu-devel] [PATCH v2 0/3] Fix strncpy() warnings for GCC8 new -Wstringop-truncation

[Michael S. Tsirkin]

On Tue, Dec 18, 2018 at 03:45:08PM +0100, Paolo Bonzini wrote:
> On 18/12/18 15:31, Michael S. Tsirkin wrote:
> > Do you happen to know why does it build fine with
> > Gcc 8.2.1?
> > 
> > Reading the GCC manual it seems that
> > there is a "nostring" attribute that means
> > "might not be 0 terminated".
> > I think we should switch to that which fixes the warning
> > but also warns if someone tries to misuse these
> > as C-strings.
> > 
> > Seems to be a better option, does it not?
> > 
> > 
> 
> Using strpadcpy is clever and self-documenting, though.  We have it
> already, so why not use it.
> 
> Paolo

The advantage of nonstring is that it will catch attempts to
use these fields with functions that expect a 0 terminated string.

strpadcpy will instead just silence the warning.


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MST