Re: [Qemu-devel] qemu-system-nios2 hangs when emulator is quit

[Marek Vasut]

On 10/10/2017 10:15 AM, Thomas Huth wrote:
> On 10.10.2017 09:57, Marek Vasut wrote:
>> On 10/10/2017 09:20 AM, Thomas Huth wrote:
>>>  Hi Chris, hi Marek,
>>
>> Hi,
>>
>>> I recently noticed that when I start qemu-system-nios2 (build from the
>>> very latest git master branch) and then type "quit" at the monitor (or
>>> simply try to close the GTK window), QEMU does not shut down right and
>>> hangs somewhere in pause_all_vcpus() forever.
>>> Do you have any idea what might be wrong here?
>>
>> Nope, can you debug it and ev. send patch ?
> 
> Backtrace looks like this:
> 
> #0  0x00007ffff7931945 in pthread_cond_wait@@GLIBC_2.3.2 () at 
> /lib64/libpthread.so.0
> #1  0x00005555557cf9c5 in qemu_cond_wait (address@hidden <qemu_pause_cond>, 
> address@hidden <qemu_global_mutex>) at util/qemu-thread-posix.c:161
> #2  0x0000555555606ee8 in pause_all_vcpus () at cpus.c:1620
> #3  0x00005555555cc43a in main (argc=<optimized out>, argv=<optimized out>, 
> envp=<optimized out>)
>     at vl.c:4906
> 
> Looks like the CPU does not get stopped right? Unfortunately, I've got no
> good clue how to debug that further right now...

I'd look at pause_all_vcpus() and check why it is stuck.
I'm a bit overloaded at the moment, so I don't have time to dig in it.

>> We're talking about git HEAD, right ?
> 
> Yes.
> 
>  Thomas
> 


-- 
Best regards,
Marek Vasut