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Re: [Qemu-devel] OSX build issues

From: Tristan Gingold
Subject: Re: [Qemu-devel] OSX build issues
Date: Thu, 17 Mar 2011 12:09:00 +0100

On Mar 17, 2011, at 11:28 AM, François Revol wrote:

> Hi,
> Le 16 mars 2011 à 08:57, Tristan Gingold a écrit :
>>> It should fix the build issue.
>>> But QEMU is unreliable on OSX even when it gets built.
>>> I tried to bisect but lost some time trying to find a revision that 
>>> actually builds. I thought I updated more this month...
>>> 55f8d6ac3e03d2859393c281737f60c65dfc9ab3 definitely works ok.
>> J'utilise ce hack pour eviter ce probleme.
> Indeed this hack works (quite a hack for someone working on ada :p)...

That's why I send it to you via a private mail ;-)

Note that I also get failures on Linux iirc.

> From the content of the functions called it's either one of the added fds 
> which cause problem on select() (but why ?), or likely some signal masks 
> which interfere with some internal thread in the process.
> I sampled the process and took some screenshots without and with the #if 0 
> hack:
> http://revolf.free.fr/osx/shots/shot_qemu_init_main_loop_if0.png
> Things work but oddly what is supposed to be an internal dispatcher thread 
> ends up executing qemu code. The main thread includes lots of calls from 
> arbitrary addresses indicating it receives some signals.
> http://revolf.free.fr/osx/shots/shot_qemu_init_main_loop_if1.png
> Things stale, and there are 2 more threads that wait, and the main thread 
> seems quite stuck in select().

Yes, I have to investigate that...


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