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Re: [plpython] Add missing volatile qualifier.

Nathan Bossart <nathandbossart@gmail.com>

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From: Nathan Bossart <nathandbossart@gmail.com>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Xing Guo <higuoxing@gmail.com>, pgsql-hackers <pgsql-hackers@postgresql.org>
Date: 2024-04-01T18:29:20Z
Lists: pgsql-hackers 
On Mon, Apr 01, 2024 at 11:57:07AM -0400, Tom Lane wrote:
> Xing Guo <higuoxing@gmail.com> writes:
>> I'm playing a toy static analysis checker with PostgreSQL and found a
>> variable is missing volatile qualifier.
> 
> Good catch!  It looks like the consequences of a failure would be
> pretty minimal --- AFAICS, no worse than a possible failure to remove
> a refcount on Py_None --- but that's still a bug.

Huh.  I seem to have dropped that "volatile" shortly before committing for
some reason [0].

> I don't care for your proposed fix though.  I think the real problem
> here is schizophrenia about when to set up pltargs, and we could
> fix it more nicely as attached.  (Perhaps the Asserts are overkill
> though.)

Your fix seems fine to me.

[0] https://postgr.es/m/20230504234235.GA2419591%40nathanxps13

-- 
Nathan Bossart
Amazon Web Services: https://aws.amazon.com

Commits

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  1. Avoid possible longjmp-induced logic error in PLy_trigger_build_args.