| From: | Andres Freund <andres(at)anarazel(dot)de> |
|---|---|
| To: | Peter Eisentraut <peter(dot)eisentraut(at)2ndquadrant(dot)com> |
| Cc: | pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: GCC 7 warnings |
| Date: | 2017-04-10 16:16:27 |
| Message-ID: | 20170410161627.qzijmrd2l22pfbwc@alap3.anarazel.de |
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| Lists: | pgsql-hackers |
On 2017-04-10 09:10:07 -0700, Andres Freund wrote:
> Hi,
>
> On 2017-04-10 11:03:23 -0400, Peter Eisentraut wrote:
> > The release of GCC 7 is approaching [0], and the number of warnings in
> > PostgreSQL has gone up since we last looked [1]. Output attached. (My
> > version is 7.0.1 20170408.)
> >
> > Most of the issues have to do with concatenating two or more strings of
> > potential size MAXPGPATH into another buffer of size MAXPGPATH, which
> > could lead to truncation.
>
> Hm, interesting - I don't see this with
> gcc-7 (Debian 7-20170407-1) 7.0.1 20170407 (experimental) [trunk revision 246759]
> although I do recall having seen them at some point. Not sure what's up
> there.
Hm. That's with -Wformat-truncation=1 (which is what's added by -Wextra
afaics), I see a good chunk more with -Wformat-truncation=2 - but that's
not enabled by -Wall/extra, so I don't really see a problem right now?
- Andres
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