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Subject: Re: [alpine-aports] phantonjs question
From: Nathan Johnson <nathan@nathanjohnson.org>
In-Reply-To: <20160408083604.1e65c454@ncopa-desktop.alpinelinux.org>
Date: Sun, 10 Apr 2016 09:42:49 -0500
Cc: alpine-aports@lists.alpinelinux.org
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Message-Id: <C3137206-0F76-4D2D-A6B0-B6D2E154BC41@nathanjohnson.org>
References: <7BCBCAF4-ED74-4EE4-9CB4-D5C79F7A52C3@nathanjohnson.org> <20160408083604.1e65c454@ncopa-desktop.alpinelinux.org>
To: Natanael Copa <ncopa@alpinelinux.org>

First off, thank you for the reply.  Second, sorry it took so long
to get back to you.

I=E2=80=99ve compiled PhantomJS in several different ways, and I keep
getting a hangup on even trivial examples.  I=E2=80=99ve opened a bug =
here:

https://github.com/ariya/phantomjs/issues/14186

I was able to reproduce the same hangup in an image built from your
Dockerfile.  So far I=E2=80=99m not seeing anything interesting in =
strace,
for now I seem to be stuck.  I=E2=80=99ll keep digging, but curious if =
you can
reproduce this.

Thanks,
Nathan

> On Apr 8, 2016, at 1:36 AM, Natanael Copa <ncopa@alpinelinux.org> =
wrote:
>=20
> On Thu, 7 Apr 2016 21:50:43 -0500
> Nathan Johnson <nathan@nathanjohnson.org> wrote:
>=20
>> I*m playing with a phantomjs port, and it looks like Natanael Copa
>> already made two PRs to some deps to make it compile (Thanks =
Natanael!).
>>=20
>> https://github.com/Vitallium/qtbase/pull/4
>>=20
>> https://github.com/Vitallium/qtwebkit/pull/9
>>=20
>> I can*t help but think he*s already started down this path.
>>=20
>> The bad news is, the test harness seems to bomb.  If I run this under
>> the grsec kernel, it signal 11*s all over the place.  If I run under
>> vanilla, no segfaults, but it does time out when phantomjs tries to
>> connect to the python httpd process.  For what it*s worth, I also get
>> similar timeouts when doing a wget to localhost on the same port, so
>> I am inclined to believe it might be an issue with the python script.
>=20
>=20
> phantomjs uses JIT which does not work with the memory protections in
> grsec kernel. You have to disable those for the phantomjs binary:
>=20
>  paxctl -cm bin/phantomjs
>=20
>> If I don*t hear anything back, I*ll continue into the rabbit hole.
>> Just wanted to make sure I wasn't duplicating effort.
>=20
> I published the Dockerfile I used to build phantomjs:
>=20
> =
https://github.com/ncopa/docker-phantomjs-alpine/blob/master/Dockerfile
>=20
> -nc
>=20
>=20
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>=20



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