Re: segmentation fault when cassert enabled

From: Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>
To: Jehan-Guillaume de Rorthais <jgdr(at)dalibo(dot)com>
Cc: Peter Eisentraut <peter(dot)eisentraut(at)2ndquadrant(dot)com>, vignesh C <vignesh21(at)gmail(dot)com>, Petr Jelinek <petr(dot)jelinek(at)2ndquadrant(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>, Peter Geoghegan <pg(at)bowt(dot)ie>
Subject: Re: segmentation fault when cassert enabled
Date: 2019-12-17 04:39:43
Message-ID: CAA4eK1LdJ0wdouSk3fHXJrsQuEjw6KSR9xxFWrzAFyLJV8VU1Q@mail.gmail.com
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On Mon, Dec 16, 2019 at 9:16 PM Jehan-Guillaume de Rorthais
<jgdr(at)dalibo(dot)com> wrote:
>
> On Mon, 16 Dec 2019 13:27:43 +0100
> Peter Eisentraut <peter(dot)eisentraut(at)2ndquadrant(dot)com> wrote:
>
> > On 2019-12-16 11:11, Amit Kapila wrote:
> > > I agree that this is a timing issue. I also don't see a way to write
> > > a reproducible test for this. However, I could reproduce it via
> > > debugger consistently by following the below steps. I have updated a
> > > few comments and commit messages in the attached patch.
> > >
> > > Peter E., Petr J or anyone else, do you have comments or objections on
> > > this patch? If none, then I am planning to commit (and backpatch)
> > > this patch in a few days time.
> >
> > The patch seems fine to me. Writing a test seems hard. Let's skip it.
> >

Okay.

> > The commit message has a duplicate "building"/"built" in the first sentence.
>
> I think the sentence is quite long. I had to re-read it to get it.
>
> What about:
>
> This patch allows building the local relmap cache for a subscribed relation
> after processing pending invalidation messages and potential relcache
> updates.
>

Attached patch with updated commit message based on suggestions. I am
planning to commit this tomorrow unless there are more comments.

--
With Regards,
Amit Kapila.
EnterpriseDB: http://www.enterprisedb.com

Attachment Content-Type Size
0001-Fix-subscriber-invalid-memory-access-on-DDL.amit.2.patch application/octet-stream 3.2 KB

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