Re: [Qemu-devel] qemu 1.6.1

[Stefan Weil <sw@weilnetz.de>]

Am 24.10.2013 12:38, schrieb Paolo Bonzini:
> Il 23/10/2013 21:26, Stefan Weil ha scritto:
>> Am 23.10.2013 11:00, schrieb Paolo Bonzini:
>>> Il 23/10/2013 08:39, Michael W. Bombardieri ha scritto:
>>>> Hi,
>>>>
>>>> My newly built qemu/win32 binary (v1.6.1) crashes in qemu-system-i386 and qemu-system-x86_64 when
>>>> booting from an install CD.
>>>>
>>>> 	C:\Program Files\qemu>qemu-system-x86_64 -boot d -vnc 0.0.0.0:20 -cdrom NetBSD-6.1.2-amd64.iso
>>>> 	Assertion failed: qemu_in_coroutine(), file qemu-coroutine-lock.c, line 99
>>>>
>>>> 	This application has requested the Runtime to terminate it in an unusual way.
>>>> 	Please contact the application's support team for more information.
>>>>
>>>> I noticed that qemu-system-sparc still booted OpenBSD/sparc 5.3 install CD correctly.
>>>> No further info at this stage.
>>>> Any ideas?
>>> It's a known problem that not everyone can reproduce.  Please compile
>>> with --disable-coroutine-pool on the configure command line.
>>>
>>> Paolo
>> This patch also helps (at least for me, tested native and on Linux / Wine):
>> http://repo.or.cz/w/qemu/ar7.git/commit/c777d5d62a729fd8b19847aaa0aad3d7a1f73f47
>>
>> It looks like a compiler problem related to thread local storage
>> (variable "current").
> Ugh.
>
>> I recently got several bug reports from a Windows user and included
>> patches to fix them in
>> my personal tree http://repo.or.cz/w/qemu/ar7.git. The binaries on
>> qemu.weilnetz.de
>> are based on that tree.
> Does something like
>
>      CoroutineWin32 *from = DO_UPCAST(CoroutineWin32, base, current);
>
> also work?  Then we can just remove from_.
>
> Paolo

Yes, that works, too. It also fixes the problem with the assertion
(tested with Wine).

No, we cannot remove from_, because the same interface is also used
for Linux and other hosts which don't have a 'current' variable.
Or we would have to call qemu_coroutine_self() to get the current
coroutine.

Stefan