Re: [Qemu-devel] Compiling QEMU x86_64 for windows 64 bit

[Vikas Desai]

Thanks Stefan. Appreciate the quick response.

I tried recompiling with --enable-debug but the binaries still die without any error message. I am using mingw64 + MSYS and SDL. I would probably take the easy route and wait for you to publish the new builds :)

Cheers,

Vikas

> Date: Thu, 26 Sep 2013 23:13:58 +0200
> From: address@hidden
> To: address@hidden
> CC: address@hidden; address@hidden
> Subject: Re: [Qemu-devel] Compiling QEMU x86_64 for windows 64 bit
>
> Am 26.09.2013 21:05, schrieb Stefan Weil:
> > Am 26.09.2013 13:23, schrieb Vikas Desai:
> >> Hi,
> >>
> >> After some further testing I found that even the 32 bit binaries from
> >> Stefan fail with the same error. I tried the 32 bit binaries from by
> >> Eric Lassauge for version 1.6 and they work well. I have tried both 32
> >> and 64 bit binaries from Stefan on 2 different environments, both
> >> failing with same errors.
> >>
> >> When I just run the binaries with no disk image or any other options,
> >> I get a proper window with the BIOS going through all drives looking
> >> for a bootable device. Only when I have a valid executable image I get
> >> the error. Also, in case of the test linux binary I get a kernel panic
> >> on linux but qemu does not crash.
> >>
> >> What should I do further to debug this?
> >>
> >> Hi Stefan,
> >>
> >> Could you share what tools you use for the build? Any hints on what
> >> more could I try?
> >>
> >> Thanks,
> >> Vikas
> > Hi Vikas,
> >
> > I also get the corouting assertion when I start my precompiled QEMU
> > binary with an ISO image (Debian i386 netinstall).
> > The error can be reproduced with Wine on Linux, too.
> >
> > There is no error when QEMU was configured with --enable-debug (which
> > disables optimisation),
> > nor is there an error when I just run the BIOS code (no disk, no cdrom).
> > This explains why I did not
> > notice the regression for Windows earlier.
> >
> > So we have to find the first version which shows that regression, either
> > by testing older installers
> > or by running git bisect.
> >
> > Cheers,
> > Stefan
>
> Summary:
>
> Latest qemu-system-i386 for Windows fails with an assertion
> (qemu-coroutine-lock.c:99)
> if something more complex than the BIOS is executed. It works when it is
> configured with
> --enable-debug. This behaviour is identical for 32 bit and 64 bit
> executables and can also
> be reproduced using Wine. Older versions also fail, but with SIGSEGV
> instead of an assertion.
>
> This is the result of git bisect:
>
> 402397843e20e35d6cb7c80837c7cfdb19ede591 is the first bad commit
> commit 402397843e20e35d6cb7c80837c7cfdb19ede591
> Author: Paolo Bonzini <address@hidden>
> Date: Tue Feb 19 11:59:09 2013 +0100
>
> coroutine: move pooling to common code
>
> The coroutine pool code is duplicated between the ucontext and
> sigaltstack backends, and absent from the win32 backend. But the
> code can be shared easily by moving it to qemu-coroutine.c.
>
> Signed-off-by: Paolo Bonzini <address@hidden>
> Reviewed-by: Stefan Hajnoczi <address@hidden>
> Signed-off-by: Kevin Wolf <address@hidden>
>
> When I configure latest QEMU with --disable-coroutine-pool, it works!
>
> I'll build new installers with this option until there is a bug fix
> available.
>
> Thanks for your bug report.
>
> Stefan
>