Re: [bug fix] Produce a crash dump before main() on Windows

From: Craig Ringer <craig(at)2ndquadrant(dot)com>
To: Michael Paquier <michael(at)paquier(dot)xyz>
Cc: "Tsunakawa, Takayuki" <tsunakawa(dot)takay(at)jp(dot)fujitsu(dot)com>, Haribabu Kommi <kommi(dot)haribabu(at)gmail(dot)com>, Magnus Hagander <magnus(at)hagander(dot)net>, Pg Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: [bug fix] Produce a crash dump before main() on Windows
Date: 2018-07-18 07:17:24
Message-ID: CAMsr+YGW3Z_OOP3dBmMzp1AZNMSNWWBQr2u3HbomsR+FG6gxcA@mail.gmail.com
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On 18 July 2018 at 14:34, Michael Paquier <michael(at)paquier(dot)xyz> wrote:

> On Wed, Jul 18, 2018 at 06:09:57AM +0000, Tsunakawa, Takayuki wrote:
> > From: Haribabu Kommi [mailto:kommi(dot)haribabu(at)gmail(dot)com]
> >> I reviewed patch and it works as per the subject, but I am not able to
> verify
> >> the actual
> >> bug that is reported in the upthread. The moving of setErrorMode() call
> >> to the start
> >> of the main function can handle all the cases that can lead to a crash
> with
> >> no popup.
> >
> > Thank you for reviewing the patch. Yeah, I don't know reproduce the
> > problem too, because some bug of Symantec AntiVirus randomly caused
> > the crash before main()...
>
> A suggestion that I have here would be to patch manually the postmaster
> with any kind of code which would make it to crash before main() is
> called. Anything is fine as long as a core dump is produced, right?
>
>
When I was doing the original crashdump support I wrote a crashme
extension that deliberately dereferenced a null pointer.

You'd do something similar in the postmaster for the testing.

--
Craig Ringer http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services

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