Re: All games maded with Unity engine in steam catalog crashes on AMD GPU, but worked on Intel GPU on same machine.

From: mikhail <mikhail.v.gavrilov-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
To: "Marek Olšák" <maraeo-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Cc: "amd-gfx-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org"
	<amd-gfx-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org>
Subject: Re: All games maded with Unity engine in steam catalog crashes on AMD GPU, but worked on Intel GPU on same machine.
Date: Thu, 01 Feb 2018 21:27:34 +0500	[thread overview]
Message-ID: <1517502454.21706.3.camel@gmail.com> (raw)
In-Reply-To: <CAAxE2A4vOw-uK1rNFPWCpE933B7mJwYt3V-vq4hpxeuGwzQV2w-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>

On Tue, 2018-01-30 at 22:38 +0100, Marek Olšák wrote:
> On Tue, Jan 30, 2018 at 10:36 PM, Marek Olšák <maraeo@gmail.com>
> wrote:
> > On Tue, Jan 30, 2018 at 10:04 PM, mikhail <mikhail.v.gavrilov@gmail
> > .com> wrote:
> > > On Tue, 2018-01-30 at 20:12 +0100, Marek Olšák wrote:
> > > > Can you record an apitrace on a driver that is not radeonsi?
> > > 
> > > All traces from five listed games was recorded on Intel GPU (not
> > > radeonsi).
> > > I also understood why for some games traces was not recorded
> > > yesterday.
> > > It happens because such games are 32 bit and for correct working
> > > apitrace was needed apitrace-libs-7.1-7.fc27.i686 package, but
> > > only
> > > apitrace-libs-7.1-7.fc27.x86_64 was installed.
> > > 
> > > > If yes, can you correctly replay the apitrace on a driver that
> > > > is not
> > > > radeonsi?
> > > 
> > > All traces was correctly replayed on Intel GPU (not radeonsi).
> > > 
> > > > If yes, can you reproduce the crash if you replay the apitrace
> > > > on
> > > > radeonsi?
> > > 
> > > All traces also was correctly replayed on AMD Vega 56 GPU
> > > (radeonsi)
> > > without crashes.
> > > 
> > > What does this give us?
> > > 
> > > Anyway launching listed games under AMD Vega 56 GPU lead to new
> > > crases.
> > 
> > Thanks. It's possible that Unity contains its own version of LLVM
> > or
> > its own version of some standard libraries that LLVM uses, and
> > radeonsi doesn't like when games replace its dependencies.
> 
> It's also possible that some symbols exported by Unity clash with
> those exported by LLVM.
> 
> Marek
> 

I am created thread in Unity forum with describeb issue and link to
this thread:
https://forum.unity.com/threads/all-games-maded-with-unity-engine-crash
es-on-amd-gpu-but-worked-on-intel-gpu-on-same-machine.515193/#post-3376
548

And got answer from Tak:
This looks like a driver crash in free/delete after
mesa_glsl_link_shader.
I don't believe that Unity is duplicating these symbols (as concluded
in the freedesktop thread) - as far as I can tell, this is all in the
radeonsi driver.
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