Thread 27 (Thread 0x7f08414fd700 (LWP 21469)): #0 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 #1 0x00007f084b5a7de8 in rtSemEventWait (fAutoResume=true, cMillies=, hEventSem=0x7f083418e300) at /home/user/VirtualBox-4.3.20/src/VBox/Runtime/r3/linux/../posix/semevent-posix.cpp:382 #2 RTSemEventWait (hEventSem=0x7f083418e300, cMillies=) at /home/user/VirtualBox-4.3.20/src/VBox/Runtime/r3/linux/../posix/semevent-posix.cpp:495 #3 0x00007f084b575675 in rtCritSectRwEnterExcl (pThis=0x7f08340c9380, fTryOnly=, pSrcPos=) at /home/user/VirtualBox-4.3.20/src/VBox/Runtime/generic/critsectrw-generic.cpp:591 #4 0x0000000000621d82 in util::AutoLockBase::callLockOnAllHandles (this=this@entry=0x7f08414fc600) at /home/user/VirtualBox-4.3.20/src/VBox/Main/glue/AutoLock.cpp:441 #5 0x0000000000621e2a in util::AutoLockBase::acquire (this=this@entry=0x7f08414fc600) at /home/user/VirtualBox-4.3.20/src/VBox/Main/glue/AutoLock.cpp:486 #6 0x00000000005080ef in AutoWriteLock (aLockable=, this=) at /home/user/VirtualBox-4.3.20/include/VBox/com/AutoLock.h:512 #7 Medium::unlockRead (this=0x7f0834023a30, aState=aState@entry=0x0) at /home/user/VirtualBox-4.3.20/src/VBox/Main/src-server/MediumImpl.cpp:2190 #8 0x000000000055b8bd in MediumLockToken::uninit (this=0x7f06c400a0a0) at /home/user/VirtualBox-4.3.20/src/VBox/Main/src-server/TokenImpl.cpp:184 #9 0x000000000055b853 in MediumLockToken::abandon (this=0x7f06c400a0a0, aAutoCaller=...) at /home/user/VirtualBox-4.3.20/src/VBox/Main/src-server/TokenImpl.cpp:200 #10 0x000000000060d0c6 in TokenWrap::Abandon (this=0x7f06c400a0a0) at /home/user/VirtualBox-4.3.20/out/linux.amd64/release/obj/VBoxAPIWrap/TokenWrap.cpp:52 #11 0x00000000005262ef in MediumLock::Unlock (this=this@entry=0x7f06c4003700) at /home/user/VirtualBox-4.3.20/src/VBox/Main/src-server/MediumLock.cpp:141 #12 0x00000000005263e9 in MediumLockList::Unlock (this=0x7f06c4001140) at /home/user/VirtualBox-4.3.20/src/VBox/Main/src-server/MediumLock.cpp:254 #13 0x000000000052679c in Unlock (this=) at /home/user/VirtualBox-4.3.20/src/VBox/Main/src-server/MediumLock.cpp:247 #14 MediumLockListMap::Unlock (this=0x7f07c8108d58) at /home/user/VirtualBox-4.3.20/src/VBox/Main/src-server/MediumLock.cpp:376 #15 0x00000000004be2ad in Machine::commitMedia (this=this@entry=0x7f0800052320, aOnline=true) at /home/user/VirtualBox-4.3.20/src/VBox/Main/src-server/MachineImpl.cpp:11899 #16 0x00000000004ddff4 in Machine::commit (this=this@entry=0x7f0800052320) at /home/user/VirtualBox-4.3.20/src/VBox/Main/src-server/MachineImpl.cpp:12306 #17 0x00000000004e18d9 in Machine::saveSettings (this=this@entry=0x7f0800052320, pfNeedsGlobalSaveSettings=pfNeedsGlobalSaveSettings@entry=0x0, aFlags=4, aFlags@entry=1267214342) at /home/user/VirtualBox-4.3.20/src/VBox/Main/src-server/MachineImpl.cpp:10432 #18 0x0000000000546d91 in SessionMachine::EndTakingSnapshot (this=0x7f0800052320, aSuccess=1) at /home/user/VirtualBox-4.3.20/src/VBox/Main/src-server/SnapshotImpl.cpp:1669 #19 0x00007f084afb9ff4 in VBoxNsxpXPTC_InvokeByIndex (that=0x7f08000524d0, methodIndex=19, paramCount=, params=) at /home/user/VirtualBox-4.3.20/src/libs/xpcom18a4/xpcom/reflect/xptcall/src/md/unix/xptcinvoke_x86_64_linux.cpp:209 #20 0x00007f08443ba27d in ipcDConnectService::OnInvoke (this=0x1e8f5d0, peer=120, invoke=0x7f0760046110, opLen=) at /home/user/VirtualBox-4.3.20/src/libs/xpcom18a4/ipc/ipcd/extensions/dconnect/src/ipcDConnectService.cpp:4079 #21 0x00007f08443bac45 in ipcDConnectService::OnIncomingRequest (this=, peer=, op=, opLen=) at /home/user/VirtualBox-4.3.20/src/libs/xpcom18a4/ipc/ipcd/extensions/dconnect/src/ipcDConnectService.cpp:3706 #22 0x00007f08443bad81 in DConnectWorker::Run (this=0x7f078c0de8e0) at /home/user/VirtualBox-4.3.20/src/libs/xpcom18a4/ipc/ipcd/extensions/dconnect/src/ipcDConnectService.cpp:2979 #23 0x00007f084afad757 in nsThread::Main (arg=0x7f078c035a20) at /home/user/VirtualBox-4.3.20/src/libs/xpcom18a4/xpcom/threads/nsThread.cpp:118 #24 0x00007f084afbd264 in _pt_root (arg=0x7f078c0fcf40) at /home/user/VirtualBox-4.3.20/src/libs/xpcom18a4/nsprpub/pr/src/pthreads/ptthread.c:224 #25 _pt_iprt_root (Thread=, pvUser=0x7f078c0fcf40) at /home/user/VirtualBox-4.3.20/src/libs/xpcom18a4/nsprpub/pr/src/pthreads/ptthread.c:272 #26 0x00007f084b52dec4 in rtThreadMain (pThread=0x7f078c00a730, NativeThread=139673432217344, pszThreadName=) at /home/user/VirtualBox-4.3.20/src/VBox/Runtime/common/misc/thread.cpp:712 #27 0x00007f084b5a4fec in rtThreadNativeMain (pvArgs=0x7f078c00a730) at /home/user/VirtualBox-4.3.20/src/VBox/Runtime/r3/posix/thread-posix.cpp:324 #28 0x00007f084b87f182 in start_thread (arg=0x7f08414fd700) at pthread_create.c:312 #29 0x00007f084a50fefd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111 Thread 3 (Thread 0x7f08411e5700 (LWP 31013)): #0 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 #1 0x00007f084b5a8305 in rtSemEventMultiPosixWaitIndefinite (pThis=0x7f06ec004d90, pSrcPos=, fFlags=) at /home/user/VirtualBox-4.3.20/src/VBox/Runtime/r3/linux/../posix/semeventmulti-posix.cpp:432 #2 0x00007f084b5a8998 in rtSemEventMultiPosixWaitTimed (pSrcPos=, uTimeout=, fFlags=, pThis=) at /home/user/VirtualBox-4.3.20/src/VBox/Runtime/r3/linux/../posix/semeventmulti-posix.cpp:466 #3 rtSemEventMultiPosixWait (pSrcPos=0x0, uTimeout=, fFlags=, hEventMultiSem=0x7f06ec004d90) at /home/user/VirtualBox-4.3.20/src/VBox/Runtime/r3/linux/../posix/semeventmulti-posix.cpp:606 #4 RTSemEventMultiWaitEx (hEventMultiSem=0x7f06ec004d90, fFlags=80, uTimeout=) at /home/user/VirtualBox-4.3.20/src/VBox/Runtime/r3/linux/../posix/semeventmulti-posix.cpp:614 #5 0x00007f084b57537e in rtCritSectRwEnterShared (pThis=0x7f06ec004d40, fTryOnly=, pSrcPos=) at /home/user/VirtualBox-4.3.20/src/VBox/Runtime/generic/critsectrw-generic.cpp:264 #6 0x0000000000621d82 in util::AutoLockBase::callLockOnAllHandles (this=this@entry=0x7f08411e4130) at /home/user/VirtualBox-4.3.20/src/VBox/Main/glue/AutoLock.cpp:441 #7 0x0000000000621e2a in util::AutoLockBase::acquire (this=this@entry=0x7f08411e4130) at /home/user/VirtualBox-4.3.20/src/VBox/Main/glue/AutoLock.cpp:486 #8 0x000000000043cbd8 in util::AutoReadLock::AutoReadLock (this=0x7f08411e4130, aLockable=) at /home/user/VirtualBox-4.3.20/include/VBox/com/AutoLock.h:379 #9 0x00000000005228e7 in Medium::saveSettings (this=0x7f06ec004680, data=..., strHardDiskFolder=...) at /home/user/VirtualBox-4.3.20/src/VBox/Main/src-server/MediumImpl.cpp:3908 #10 0x0000000000522c16 in Medium::saveSettings (this=0x7f0770000aa0, data=..., strHardDiskFolder=...) at /home/user/VirtualBox-4.3.20/src/VBox/Main/src-server/MediumImpl.cpp:3974 #11 0x0000000000522c16 in Medium::saveSettings (this=this@entry=0x7f0834023a30, data=..., strHardDiskFolder=...) at /home/user/VirtualBox-4.3.20/src/VBox/Main/src-server/MediumImpl.cpp:3974 #12 0x0000000000579283 in VirtualBox::saveMediaRegistry (this=, mediaRegistry=..., uuidRegistry=..., strMachineFolder=...) at /home/user/VirtualBox-4.3.20/src/VBox/Main/src-server/VirtualBoxImpl.cpp:4209 #13 0x00000000004e14e2 in Machine::copyMachineDataToSettings (this=this@entry=0x7f083401ad10, config=...) at /home/user/VirtualBox-4.3.20/src/VBox/Main/src-server/MachineImpl.cpp:10566 #14 0x00000000004e1867 in Machine::saveSettings (this=0x7f083401ad10, pfNeedsGlobalSaveSettings=pfNeedsGlobalSaveSettings@entry=0x7f08411e495b, aFlags=aFlags@entry=4) at /home/user/VirtualBox-4.3.20/src/VBox/Main/src-server/MachineImpl.cpp:10393 #15 0x000000000057b58f in VirtualBox::saveModifiedRegistries (this=0x7f0834000cd0) at /home/user/VirtualBox-4.3.20/src/VBox/Main/src-server/VirtualBoxImpl.cpp:4769 #16 0x0000000000546cbe in SessionMachine::EndTakingSnapshot (this=0x7f081c011d90, aSuccess=1) at /home/user/VirtualBox-4.3.20/src/VBox/Main/src-server/SnapshotImpl.cpp:1713 #17 0x00007f084afb9ff4 in VBoxNsxpXPTC_InvokeByIndex (that=0x7f081c011f40, methodIndex=19, paramCount=, params=) at /home/user/VirtualBox-4.3.20/src/libs/xpcom18a4/xpcom/reflect/xptcall/src/md/unix/xptcinvoke_x86_64_linux.cpp:209 #18 0x00007f08443ba27d in ipcDConnectService::OnInvoke (this=0x1e8f5d0, peer=110, invoke=0x7f081c050dc0, opLen=) at /home/user/VirtualBox-4.3.20/src/libs/xpcom18a4/ipc/ipcd/extensions/dconnect/src/ipcDConnectService.cpp:4079 #19 0x00007f08443bac45 in ipcDConnectService::OnIncomingRequest (this=, peer=, op=, opLen=) at /home/user/VirtualBox-4.3.20/src/libs/xpcom18a4/ipc/ipcd/extensions/dconnect/src/ipcDConnectService.cpp:3706 #20 0x00007f08443bad81 in DConnectWorker::Run (this=0x7f06e00341d0) at /home/user/VirtualBox-4.3.20/src/libs/xpcom18a4/ipc/ipcd/extensions/dconnect/src/ipcDConnectService.cpp:2979 #21 0x00007f084afad757 in nsThread::Main (arg=0x7f06e0034a70) at /home/user/VirtualBox-4.3.20/src/libs/xpcom18a4/xpcom/threads/nsThread.cpp:118 #22 0x00007f084afbd264 in _pt_root (arg=0x7f06e0015270) at /home/user/VirtualBox-4.3.20/src/libs/xpcom18a4/nsprpub/pr/src/pthreads/ptthread.c:224 #23 _pt_iprt_root (Thread=, pvUser=0x7f06e0015270) at /home/user/VirtualBox-4.3.20/src/libs/xpcom18a4/nsprpub/pr/src/pthreads/ptthread.c:272 #24 0x00007f084b52dec4 in rtThreadMain (pThread=0x7f06e0034c00, NativeThread=139673428973312, pszThreadName=) at /home/user/VirtualBox-4.3.20/src/VBox/Runtime/common/misc/thread.cpp:712 #25 0x00007f084b5a4fec in rtThreadNativeMain (pvArgs=0x7f06e0034c00) at /home/user/VirtualBox-4.3.20/src/VBox/Runtime/r3/posix/thread-posix.cpp:324 #26 0x00007f084b87f182 in start_thread (arg=0x7f08411e5700) at pthread_create.c:312 #27 0x00007f084a50fefd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111