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From: Tristan Partin <[email protected]>
To: Tom Lane <[email protected]>
Cc: pgsql-hackers <[email protected]>
Subject: Re: Add malloc attribute to memory allocation functions
Date: Mon, 06 Jul 2026 16:34:58 +0000
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>
	<[email protected]>

On Mon Jul 6, 2026 at 4:26 AM UTC, Tom Lane wrote:
> "Tristan Partin" <[email protected]> writes:
>> Given that we now have a tree that compiles fine against 
>> -Werror=mismatched-dealloc, we need to make sure that we don't regress. 
>> By adding the malloc attribute[0], we can protect against regressions, 
>> enable more accurate code coverage with -fanalyzer, and allow the 
>> compiler to do some optimizations.
>
> I'm skeptical that this is going to lead to anything but grief.
> In particular, since gcc has never heard of memory contexts,
> I don't see how we are not going to get buried in bogus
> -Wanalyzer-malloc-leak warnings.  It doesn't really help
> to add compiler annotations that only sort-of match our semantics.
>
> (This opinion is based on years of dismissing useless Coverity
> warnings of this kind.)

This is a fair criticism. On master, the number of 
-Wanalyzer-malloc-leak warnings is 62. With this patch applied, it 
balloons to 598.

-- 
Tristan Partin
PostgreSQL Contributors Team
AWS (https://aws.amazon.com)

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