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Re: [XEN PATCH] automation/eclair_analysis: fix MISRA Rule 20.7 regression in self-tests.h
- To: Nicola Vetrini <nicola.vetrini@xxxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Mon, 9 Sep 2024 11:54:40 +0200
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- Cc: sstabellini@xxxxxxxxxx, michal.orzel@xxxxxxx, xenia.ragiadakou@xxxxxxx, ayan.kumar.halder@xxxxxxx, consulting@xxxxxxxxxxx, Simone Ballarin <simone.ballarin@xxxxxxxxxxx>, Doug Goldstein <cardoe@xxxxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Mon, 09 Sep 2024 09:54:44 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 08.09.2024 15:27, Nicola Vetrini wrote:
> --- a/docs/misra/deviations.rst
> +++ b/docs/misra/deviations.rst
> @@ -533,6 +533,14 @@ Deviations related to MISRA C:2012 Rules:
> to incur in the risk of being misused or lead to developer confusion,
> and
> refactoring it to add parentheses breaks its functionality.
> - Tagged as `safe` for ECLAIR.
> +
> + * - R20.7
> + - The macros `{COMPILE,RUNTIME}_CHECK` defined in
> + `xen/include/xen/self-tests.h` are allowed not to parenthesize their
> + arguments, to allow function-like macros to be tested as well as
> + functions. Given the specialized use of these macros and their limited
> + usage scope, omitting parentheses is deemed unlikely to cause issues.
> + - Tagged as `deliberate` for ECLAIR.
As on earlier occasions my take here again is that this is going too far:
Beside the "fn" parameter, all other parameter uses should be properly
parenthesized. I have no idea whether this can be expressed for Eclair,
but at least the verbal deviation description should imo be no more lax
than necessary.
Jan
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