Re: How to debug a segmentation fault?
| From: | Bishop Bettini | Date: | Wed, 29 Jan 2020 17:19:16 +0000 |
| Subject: | Re: How to debug a segmentation fault? | ||
| References: | 1 | Groups: | php.internals |
| Request: | Send a blank email to internals+get-108321@lists.php.net to get a copy of this message | ||
On Tue, Jan 28, 2020 at 11:28 AM Benjamin Morel <benjamin.morel@gmail.com>
wrote:
> I'm encountering a SIGSEGV in PHP-FPM on PHP 7.4.2 in a Symfony app. The
> bug seems to happen during the rendering of a Twig template; this makes it
> hard for me to pinpoint the code that triggers the segfault.
>
> Could you please tell me what the procedure to collect information is, so
> that I can file a useful bug report?
>
Great advice so far. I would add, since you're using PHP-FPM, that the pool
configuration needs to have:
process.dumpable = 1
to get core dumps out of workers. Without this you might not get core
dumps, even when you have other core dump settings configured (ulimit -c
unlimited, chmod +r phpfpm, etc.).