Received: from malur.postgresql.org ([217.196.149.56])
	by arkaria.postgresql.org with esmtp (Exim 4.84_2)
	(envelope-from
 <pgsql-bugs-owner+M49417=pgsql+2Dbugs=arkaria.postgresql.org@postgresql.org>)
	id 1eDZT4-00037g-FQ
	for pgsql-bugs@arkaria.postgresql.org; Sat, 11 Nov 2017 17:21:18 +0000
Received: from localhost ([127.0.0.1] helo=postgresql.org)
	by malur.postgresql.org with smtp (Exim 4.84_2)
	(envelope-from
 <pgsql-bugs-owner+M49417=pgsql+2Dbugs=arkaria.postgresql.org@postgresql.org>)
	id 1eDZT4-00019E-1t
	for pgsql-bugs@arkaria.postgresql.org; Sat, 11 Nov 2017 17:21:18 +0000
Received: from makus.postgresql.org ([2001:4800:1501:1::229])
	by malur.postgresql.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA384:256)
	(Exim 4.84_2)
	(envelope-from <tgl@sss.pgh.pa.us>)
	id 1eDZT2-0000zE-Ob
	for pgsql-bugs@postgresql.org; Sat, 11 Nov 2017 17:21:16 +0000
Received: from sss.pgh.pa.us ([66.207.139.130])
	by makus.postgresql.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA384:256)
	(Exim 4.89)
	(envelope-from <tgl@sss.pgh.pa.us>)
	id 1eDZT0-0007RW-GG
	for pgsql-bugs@postgresql.org; Sat, 11 Nov 2017 17:21:15 +0000
Received: from sss1.sss.pgh.pa.us (localhost [127.0.0.1])
	by sss.pgh.pa.us (8.14.4/8.14.4) with ESMTP id vABHLDGK002881;
	Sat, 11 Nov 2017 12:21:13 -0500
From: Tom Lane <tgl@sss.pgh.pa.us>
To: Dmitry Dolgov <9erthalion6@gmail.com>
cc: Michael Paquier <michael.paquier@gmail.com>,
        Vincent Lachenal <vincent.lachenal@gmail.com>,
        PostgreSQL mailing lists <pgsql-bugs@postgresql.org>
Subject: Re: BUG #14897: Segfault on statitics SQL request
In-reply-to: 
 <CA+q6zcWwjTNgA6JiqQ5L-oAFF5X9ONtKSAvznte63A7Zb7zaww@mail.gmail.com>
References: <20171110185747.31519.28038@wrigleys.postgresql.org>
 <1415.1510340891@sss.pgh.pa.us>
 <CAA2tJ7o-VK+ghsxifDAszFN5fikmG6U3sWHCEvc9nAVOypfjAw@mail.gmail.com>
 <5652.1510344738@sss.pgh.pa.us>
 <CAA2tJ7qsopt0hHbsm397H62LMsaE4hjRwaUu3FQdNgo5AYAGXA@mail.gmail.com>
 <7710.1510346813@sss.pgh.pa.us>
 <CAA2tJ7odG4KB=wvu_+5FfssxckbLTnEuR9C_TXRyeU_35z+CSA@mail.gmail.com>
 <10197.1510349123@sss.pgh.pa.us>
 <CAA2tJ7p72wbuHEzOA_g2V4YcmeDPHYKggenTR4dXG=kSpCiO8Q@mail.gmail.com>
 <14075.1510352167@sss.pgh.pa.us>
 <CA+q6zcXe9aV5NV88u9Y=vMp+=fP7QOXgTyFQhzuvmCvTBvb_kQ@mail.gmail.com>
 <17617.1510355215@sss.pgh.pa.us>
 <CAB7nPqR7mWvtnALZF93oez_v03NFCJ8dXP9CNicaUDv3KjDbYw@mail.gmail.com>
 <CA+q6zcVE2FQ9irhENEy=2WjRWgV2hyzfYyOXFs36w=hsk4faBw@mail.gmail.com>
 <644.1510418216@sss.pgh.pa.us>
 <CA+q6zcWwjTNgA6JiqQ5L-oAFF5X9ONtKSAvznte63A7Zb7zaww@mail.gmail.com>
Comments: In-reply-to Dmitry Dolgov <9erthalion6@gmail.com>
	message dated "Sat, 11 Nov 2017 17:52:34 +0100"
MIME-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-ID: <2879.1510420873.1@sss.pgh.pa.us>
Date: Sat, 11 Nov 2017 12:21:13 -0500
Message-ID: <2880.1510420873@sss.pgh.pa.us>
List-Archive: <http://archives.postgresql.org/pgsql-bugs>
List-Help: <mailto:majordomo@postgresql.org?body=help>
List-ID: <pgsql-bugs.postgresql.org>
List-Owner: <mailto:pgsql-bugs-owner@postgresql.org>
List-Post: <mailto:pgsql-bugs@postgresql.org>
List-Subscribe: <mailto:majordomo@postgresql.org?body=sub%20pgsql-bugs>
List-Unsubscribe: <mailto:majordomo@postgresql.org?body=unsub%20pgsql-bugs>
X-Mailing-List: pgsql-bugs
Precedence: bulk
Sender: pgsql-bugs-owner@postgresql.org

Dmitry Dolgov <9erthalion6@gmail.com> writes:
>> On 11 November 2017 at 17:36, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>> Would you guys who are seeing the problem note whether the address of
>> the int128 field is 16-aligned, or only 8-aligned?

> __alignof__(__int128) returns 16 on my machine.

The question was about the actual value of the pointer being used at
the time of the crash --- %rax in the example below.

> Here is the disassembly section I've got in my case:

>     0x00000000007fc47d numericvar_to_int128+467 movdqa -0x60(%rbp),%xmm0
> --> 0x00000000007fc482 numericvar_to_int128+472 movaps %xmm0,(%rax)

suspicious ...

			regards, tom lane


-- 
Sent via pgsql-bugs mailing list (pgsql-bugs@postgresql.org)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-bugs