Re: [XEN PATCH v3] automation/eclair: add deviation for MISRA C Rule 17.7

[Oleksii <oleksii.kurochko@xxxxxxxxx>]

On Fri, 2024-06-21 at 15:24 -0700, Stefano Stabellini wrote:
> On Wed, 19 Jun 2024, Stefano Stabellini wrote:
> > On Fri, 14 Jun 2024, Federico Serafini wrote:
> > > Update ECLAIR configuration to deviate some cases where not using
> > > the return value of a function is not dangerous.
> > > 
> > > Signed-off-by: Federico Serafini <federico.serafini@xxxxxxxxxxx>
> > 
> > Acked-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>
>  
> I would like to request a release ack, as this patch only affects the
> ECLAIR analysis for R17.7, which is non-blocking anyway (meaning: it
> cannot cause a gitlab-ci failure, it is only informative).
Release-Acked-by: Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>

~ Oleksii
> 
> 
> 
> > > ---
> > > Changes in v3:
> > > - removed unwanted underscores;
> > > - grammar fixed;
> > > - do not constraint to the first actual argument.
> > > Changes in v2:
> > > - do not deviate strlcpy and strlcat.
> > > ---
> > >  automation/eclair_analysis/ECLAIR/deviations.ecl | 4 ++++
> > >  docs/misra/deviations.rst                        | 9 +++++++++
> > >  2 files changed, 13 insertions(+)
> > > 
> > > diff --git a/automation/eclair_analysis/ECLAIR/deviations.ecl
> > > b/automation/eclair_analysis/ECLAIR/deviations.ecl
> > > index 447c1e6661..97281082a8 100644
> > > --- a/automation/eclair_analysis/ECLAIR/deviations.ecl
> > > +++ b/automation/eclair_analysis/ECLAIR/deviations.ecl
> > > @@ -413,6 +413,10 @@ explicit comment indicating the fallthrough
> > > intention is present."
> > >  -config=MC3R1.R17.1,macros+={hide , "^va_(arg|start|copy|end)$"}
> > >  -doc_end
> > >  
> > > +-doc_begin="Not using the return value of a function does not
> > > endanger safety if it coincides with an actual argument."
> > > +-config=MC3R1.R17.7,calls+={safe, "any()",
> > > "decl(name(__builtin_memcpy||__builtin_memmove||__builtin_memset|
> > > |cpumask_check))"}
> > > +-doc_end
> > > +
> > >  #
> > >  # Series 18.
> > >  #
> > > diff --git a/docs/misra/deviations.rst
> > > b/docs/misra/deviations.rst
> > > index 36959aa44a..f3abe31eb5 100644
> > > --- a/docs/misra/deviations.rst
> > > +++ b/docs/misra/deviations.rst
> > > @@ -364,6 +364,15 @@ Deviations related to MISRA C:2012 Rules:
> > >         by `stdarg.h`.
> > >       - Tagged as `deliberate` for ECLAIR.
> > >  
> > > +   * - R17.7
> > > +     - Not using the return value of a function does not
> > > endanger safety if it
> > > +       coincides with an actual argument.
> > > +     - Tagged as `safe` for ECLAIR. Such functions are:
> > > +         - __builtin_memcpy()
> > > +         - __builtin_memmove()
> > > +         - __builtin_memset()
> > > +         - cpumask_check()
> > > +
> > >     * - R20.4
> > >       - The override of the keyword \"inline\" in xen/compiler.h
> > > is present so
> > >         that section contents checks pass when the compiler
> > > chooses not to
> > > -- 
> > > 2.34.1
> > > 
> >