Re: [Qemu-devel] Problems with QEMU sdcard while using glib 2.33.8

[Taimoor Mirza]

Hi Stefan,

Thanks for your reply. Below are answers

$ grep CONFIG_COROUTINE_BACKEND config-host.mak
CONFIG_COROUTINE_BACKEND=win32

(gdb) r
Starting program: C:\tools\qemu\qemu-system-arm.exe
-M realview-eb -m 256 -kernel Debug\\\\KD2.out -sd fat:16:rw:C:\\testCard
[New Thread 3836.0x404]
[New Thread 3836.0x87c]
[New Thread 3836.0xd14]
[New Thread 3836.0xc58]
[Inferior 1 (process 3836) exited with code 03]
(gdb) bt
No stack.
(gdb)

When I open stderr in QEMU binary directory, it contains:
vvfat C:\\testCard chs 1024,16,63
Co-routine is yielding to no one

This application has requested the Runtime to terminate it in an unusual way.
Please contact the application's support team for more information.


Another important point to note is that it happens when I add -DNDEBUG
in my QEMU's cflags. If I don't add this then I get following error:

vvfat C:\\testCard chs 1024,16,63 Assertion failed:
qemu_in_coroutine(), file qemu-coroutine-lock.c, line 148 This
application has requested the Runtime to terminate it in an unusual
way. Please contact the application's support team for more
information.

It looks to me that it is an issue with the QEMU block driver
following the coroutine protection.

Thanks,
Taimoor


On Wed, Aug 28, 2013 at 1:11 PM, Stefan Hajnoczi <address@hidden> wrote:
> On Wed, Aug 28, 2013 at 10:14:04AM +0500, Taimoor Mirza wrote:
>> I am building QEMU on Windows using MinGW + Msys. If I build QEMU with
>> Glib 2.28, qemu binary works fine for sdcard. I noticed that QEMU
>> binary has dependency on libgthread-2.0-0.dll in this case.
>> But when I build QEMU with Glib 2.33.8 version, its sdcard option
>> throw error at run time. Also generated QEMU binary has no dependency
>> on gthread DLL.
>> Below is the error thrown while using -sd:
>>
>> vvfat C:\qemu_arm_win32\sdcard\files chs 1024,16,63
>> Co-routine is yielding to no one
>
> What is the output of:
> $ grep CONFIG_COROUTINE_BACKEND config-host.mak
>
> On Windows it should be "win32".
>
> Can you capture a backtrace using gdb?
>
> $ gdb --args qemu-system-arm.exe ...
> (gdb) r
> Co-routine is yielding to no one
> (gdb) bt
>
> Stefan