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Re: [XEN PATCH v2] automation/eclair_analysis: substitute deprecated service STD.emptrecd
- To: Nicola Vetrini <nicola.vetrini@xxxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Fri, 19 Apr 2024 16:26:26 +0200
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- Cc: sstabellini@xxxxxxxxxx, michal.orzel@xxxxxxx, xenia.ragiadakou@xxxxxxx, ayan.kumar.halder@xxxxxxx, consulting@xxxxxxxxxxx, bertrand.marquis@xxxxxxx, julien@xxxxxxx, Simone Ballarin <simone.ballarin@xxxxxxxxxxx>, Doug Goldstein <cardoe@xxxxxxxxxx>, Julien Grall <jgrall@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Fri, 19 Apr 2024 14:26:33 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 19.04.2024 15:01, Nicola Vetrini wrote:
> On 2024-04-19 11:21, Jan Beulich wrote:
>> On 19.04.2024 09:49, Nicola Vetrini wrote:
>>> On 2024-04-19 09:35, Jan Beulich wrote:
>>>> On 19.04.2024 09:16, Nicola Vetrini wrote:
>>>>> The ECLAIR service STD.emptrecd is being deprecated; hence, as a
>>>>> preventive
>>>>> measure, STD.anonstct is used here, which for Xen's purposes has
>>>>> equivalent
>>>>> functionality.
>>>>
>>>> I'm sorry, but no, this still does not clarify things enough. It is
>>>> still
>>>> entirely unclear how "empty record" can reasonably be substituted by
>>>> "anonymous struct". Even the expansion of the respective
>>>> abbreviations
>>>> continues to be just a guess.
>>>
>>> anonstct checks for structs with no named members,
>>
>> So "anonstct" != "anonymous structures". As indicated, part of the
>> description wants to be de-ciphering of these acronyms, so they can
>> make sense to readers.
>>
>> Jan
>>
>>> hence also empty
>>> structs, but only the former is an undefined behaviour for C99.
>>>
>
> Would this be a sufficiently clear explanation for you?
>
> "The ECLAIR service STD.emptrecd (which checks for empty structures) is
> being deprecated; hence, as a preventive measure, STD.anonstct (which
> checks for structures with no named members, an UB in C99) is used here;
> the latter being a more general case than the previous one, this change
> does not affect the analysis. This new service is already supported by
> the current version of ECLAIR."
Yes, this is much better. Thanks.
Jan
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