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

[Programmingkid]

On May 9, 2015, at 6:00 PM, Peter Maydell wrote:

> On 9 May 2015 at 22:42, Programmingkid <address@hidden> wrote:
>> Where you able to see the new stack trace I sent? If so, any idea what could 
>> be wrong?
> 
> Did you see the mail I sent where I asked you to try sending
> the monitor somewhere other than the GUI?
> 
> thanks
> -- PMM

Ok, I sent the monitor to the stdio using this command:  -soundhw pcspk 
-monitor stdio

Here is the stack trace of QEMU after it has froze:

Program received signal SIGINT, Interrupt.
[Switching to process 4291 thread 0xa0f]
0x00007fff824e2dc2 in semaphore_wait_signal_trap ()
(gdb) thread apply all backtrace

Thread 8 (process 4291):
#0  0x00007fff824e2dda in semaphore_timedwait_signal_trap ()
#1  0x00007fff82521772 in _pthread_cond_wait ()
#2  0x00007fff8423468c in CAGuard::WaitFor ()
#3  0x00007fff84236c1b in CAGuard::WaitUntil ()
#4  0x00007fff84234d85 in HP_IOThread::WorkLoop ()
#5  0x00007fff84234827 in HP_IOThread::ThreadEntry ()
#6  0x00007fff84234755 in CAPThread::Entry ()
#7  0x00007fff8251bfd6 in _pthread_start ()
#8  0x00007fff8251be89 in thread_start ()

Thread 7 (process 4291):
#0  0x00000001160df83f in ?? ()

Thread 6 (process 4291):
#0  0x00007fff8254499e in __sigwait ()
#1  0x00007fff82544977 in sigwait ()
#2  0x000000010036e3d0 in sigwait_compat (opaque=0x101d735d0) at 
util/compatfd.c:36
#3  0x00007fff8251bfd6 in _pthread_start ()
#4  0x00007fff8251be89 in thread_start ()

Thread 3 (process 4291):
#0  0x00007fff824fbc0a in kevent ()
#1  0x00007fff824fdadd in _dispatch_mgr_invoke ()
#2  0x00007fff824fd7b4 in _dispatch_queue_invoke ()
#3  0x00007fff824fd2de in _dispatch_worker_thread2 ()
#4  0x00007fff824fcc08 in _pthread_wqthread ()
#5  0x00007fff824fcaa5 in start_wqthread ()

Thread 2 (process 4291):
#0  0x00007fff8251da6a in __semwait_signal ()
#1  0x00007fff82521881 in _pthread_cond_wait ()
#2  0x000000010036a8ea in futex_wait (ev=0x100a9e280, val=4294967295) at 
util/qemu-thread-posix.c:328
#3  0x000000010036aa64 in qemu_event_wait (ev=0x100a9e280) at 
util/qemu-thread-posix.c:408
#4  0x000000010037ee92 in call_rcu_thread (opaque=0x0) at util/rcu.c:233
#5  0x00007fff8251bfd6 in _pthread_start ()
#6  0x00007fff8251be89 in thread_start ()

Thread 1 (process 4291):
#0  0x00007fff824e2dc2 in semaphore_wait_signal_trap ()
#1  0x00007fff824e840d in pthread_mutex_lock ()
#2  0x000000010036a348 in qemu_mutex_lock (mutex=0x10067ed40) at 
util/qemu-thread-posix.c:82
#3  0x0000000100039c2e in qemu_mutex_lock_iothread () at 
/Users/user/Documents/Development/Projects/Qemu/qemu-git/cpus.c:1128
#4  0x00000001002d7e05 in os_host_main_loop_wait (timeout=6221000) at 
main-loop.c:242
#5  0x00000001002d7eca in main_loop_wait (nonblocking=0) at main-loop.c:494
#6  0x0000000100114909 in main_loop () at vl.c:1798
#7  0x000000010011c3c4 in qemu_main (argc=5, argv=0x7fff5fbff468, 
envp=0x7fff5fbff498) at vl.c:4362
#8  0x00000001002a4339 in -[QemuCocoaAppController 
startEmulationWithArgc:argv:] (self=0x101937740, _cmd=0x1003f095e, argc=5, 
argv=0x7fff5fbff468) at cocoa.m:897
#9  0x00000001002a4192 in -[QemuCocoaAppController 
applicationDidFinishLaunching:] (self=0x101937740, _cmd=0x7fff8064d906, 
note=0x101d3b250) at cocoa.m:875
#10 0x00007fff8a50dbc5 in _nsnote_callback ()
#11 0x00007fff83a7b000 in __CFXNotificationPost ()
#12 0x00007fff83a67578 in _CFXNotificationPostNotification ()
#13 0x00007fff8a504b26 in -[NSNotificationCenter 
postNotificationName:object:userInfo:] ()
#14 0x00007fff80a1c44a in -[NSApplication _postDidFinishNotification] ()
#15 0x00007fff80a1c37f in -[NSApplication _sendFinishLaunchingNotification] ()
#16 0x00007fff80ae735d in -[NSApplication(NSAppleEventHandling) _handleAEOpen:] 
()
#17 0x00007fff80ae6fd9 in -[NSApplication(NSAppleEventHandling) 
_handleCoreEvent:withReplyEvent:] ()
#18 0x00007fff8a53c1c6 in -[NSAppleEventManager 
dispatchRawAppleEvent:withRawReply:handlerRefCon:] ()
#19 0x00007fff8a53bff6 in _NSAppleEventManagerGenericHandler ()
#20 0x00007fff84a6f32b in aeDispatchAppleEvent ()
#21 0x00007fff84a6f224 in dispatchEventAndSendReply ()
#22 0x00007fff84a6f12b in aeProcessAppleEvent ()
#23 0x00007fff87300619 in AEProcessAppleEvent ()
#24 0x00007fff809ec095 in _DPSNextEvent ()
#25 0x00007fff809eb801 in -[NSApplication 
nextEventMatchingMask:untilDate:inMode:dequeue:] ()
#26 0x00007fff809b168f in -[NSApplication run] ()
#27 0x00000001002a50ea in main (argc=5, argv=0x7fff5fbff468) at cocoa.m:1034