Re: [Qemu-devel] Help with deadlock when using sound

[Peter Maydell]

On 6 May 2015 at 17:40, Programmingkid <address@hidden> wrote:
> (gdb) bt
> #0  0x00007fff824e2db6 in semaphore_wait_trap ()
> #1  0x00007fff824e8417 in pthread_mutex_lock ()
> #2  0x0000000100267199 in qemu_mutex_lock (mutex=<value temporarily 
> unavailable, due to optimizations>) at util/qemu-thread-posix.c:73
> #3  0x003c44016e95153b in ?? ()
>
> My host is Mac OS 10.6.8. My guest isn't really anything. I have used Windows 
> XP before but it isn't necessary to reproduce the problem.
>
> The ?? is what appears to be the problem. I can't even print instructions at 
> that address. Any ideas as to what is calling the qemu_mutex_lock() function 
> could help.

Recompile with optimization disabled and try again. It would
also be helpful to provide the backtraces for all threads.

thanks
-- PMM