Re: segmentation fault when cassert enabled

Amit Kapila <amit.kapila16@gmail.com>

From: Amit Kapila <amit.kapila16@gmail.com>
To: Jehan-Guillaume de Rorthais <jgdr@dalibo.com>
Cc: Peter Eisentraut <peter.eisentraut@2ndquadrant.com>, vignesh C <vignesh21@gmail.com>, Petr Jelinek <petr.jelinek@2ndquadrant.com>, Tom Lane <tgl@sss.pgh.pa.us>, PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>, Peter Geoghegan <pg@bowt.ie>
Date: 2019-12-17T04:39:43Z
Lists: pgsql-hackers

Attachments

On Mon, Dec 16, 2019 at 9:16 PM Jehan-Guillaume de Rorthais
<jgdr@dalibo.com> wrote:
>
> On Mon, 16 Dec 2019 13:27:43 +0100
> Peter Eisentraut <peter.eisentraut@2ndquadrant.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

Commits

  1. Fix subscriber invalid memory access on DDL.

  2. Fix memory allocation mistake