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Subject: Re: PHP 7.0.14 crashing with minimal set of extensions
References: <1762469321 DOT 20161213210612 AT yandex DOT ru> <a0b430f2-bcd3-2c78-f402-9d0812181453 AT cygwin DOT com> <641869745 DOT 20161214140428 AT yandex DOT ru> <c19592da-bb4f-9b5d-7be0-0ff9852bd205 AT SystematicSw DOT ab DOT ca> <919263915 DOT 20161218214043 AT yandex DOT ru>
To: cygwin AT cygwin DOT com
Reply-To: Brian DOT Inglis AT SystematicSw DOT ab DOT ca
From: Brian Inglis <Brian DOT Inglis AT SystematicSw DOT ab DOT ca>
Message-ID: <c74f035f-09fe-3a7e-302a-eed7fdb0d922@SystematicSw.ab.ca>
Date: Sun, 18 Dec 2016 12:46:58 -0700
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On 2016-12-18 11:40, Andrey Repin wrote:
> Greetings, Brian Inglis!
>> On 2016-12-14 04:04, Andrey Repin wrote:
>>> Greetings, Yaakov Selkowitz!
>>>> On 2016-12-13 12:06, Andrey Repin wrote:
>>>>> Here's strace and stackdump from latest crash with Cygwin 
>>>>> 2.6.1-2 project.rootdir.org/.offload/crash-php-7.14.tar.xz
>>>> Are you 100% sure that your code is compatible with PHP 7?
>>>> The only segfaults I have seen so far is with old code.
>>> It's Composer. It runs with native PHP7 of the same version just
>>> fine.
>> Possibly JIT/DEP conflict see 
>> https://cygwin.com/ml/cygwin/2016-11/msg00336.html
> Gah… confirmed. Setting pcre.jit = Off let it run.

Does the native app use JIT and have no problems with Windows DEP?
Does PHP need some Cygwin specific patches to re-mmap JIT code as rx, 
or Cygwin patches so Windows sees mmap rx regions as executable code, 
or otherwise "blesses" JIT code so it is not crashed by DEP?
There should at least be some way to indicate there is a DEP issue 
rather than just crashing with a segv!

-- 
Take care. Thanks, Brian Inglis, Calgary, Alberta, Canada

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