Thread 28 (Thread 0x7fb180dbf700 (LWP 19616)): #0 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 #1 0x00007fb188a2bde8 in rtSemEventWait (fAutoResume=true, cMillies=, hEventSem=0x7fb17403fb10) at /home/user/VirtualBox-4.3.20/src/VBox/Runtime/r3/linux/../posix/semevent-posix.cpp:382 #2 RTSemEventWait (hEventSem=0x7fb17403fb10, cMillies=) at /home/user/VirtualBox-4.3.20/src/VBox/Runtime/r3/linux/../posix/semevent-posix.cpp:495 #3 0x00007fb1889f9675 in rtCritSectRwEnterExcl (pThis=0x7fb17403fac0, 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=0x7fb180dbe820) at /home/user/VirtualBox-4.3.20/src/VBox/Main/glue/AutoLock.cpp:441 #5 0x0000000000621e2a in util::AutoLockBase::acquire (this=this@entry=0x7fb180dbe820) at /home/user/VirtualBox-4.3.20/src/VBox/Main/glue/AutoLock.cpp:486 #6 0x000000000044df68 in util::AutoWriteLock::AutoWriteLock (this=0x7fb180dbe820, aLockable=) at /home/user/VirtualBox-4.3.20/include/VBox/com/AutoLock.h:512 #7 0x00000000005154a4 in Medium::removeRegistry (this=0x7fb174040a70, id=..., fRecurse=fRecurse@entry=true) at /home/user/VirtualBox-4.3.20/src/VBox/Main/src-server/MediumImpl.cpp:3392 #8 0x0000000000515591 in Medium::removeRegistry (this=, id=..., fRecurse=fRecurse@entry=true) at /home/user/VirtualBox-4.3.20/src/VBox/Main/src-server/MediumImpl.cpp:3419 #9 0x000000000057b7d0 in VirtualBox::unregisterMachine (this=0x7fb174000cd0, pMachine=pMachine@entry=0x7fb134000fe0, id=...) at /home/user/VirtualBox-4.3.20/src/VBox/Main/src-server/VirtualBoxImpl.cpp:4671 #10 0x00000000004d60f2 in Machine::Unregister (this=0x7fb134000fe0, cleanupMode=, aMediaSize=0x7fb12c001b88, aMedia=0x7fb12c001ba0) at /home/user/VirtualBox-4.3.20/src/VBox/Main/src-server/MachineImpl.cpp:5559 #11 0x00007fb18843dff4 in VBoxNsxpXPTC_InvokeByIndex (that=0x7fb134001030, methodIndex=185, paramCount=, params=) at /home/user/VirtualBox-4.3.20/src/libs/xpcom18a4/xpcom/reflect/xptcall/src/md/unix/xptcinvoke_x86_64_linux.cpp:209 #12 0x00007fb18183e27d in ipcDConnectService::OnInvoke (this=0x137c5d0, peer=20, invoke=0x138ae90, opLen=) at /home/user/VirtualBox-4.3.20/src/libs/xpcom18a4/ipc/ipcd/extensions/dconnect/src/ipcDConnectService.cpp:4079 #13 0x00007fb18183ec45 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 #14 0x00007fb18183ed81 in DConnectWorker::Run (this=0x138ca30) at /home/user/VirtualBox-4.3.20/src/libs/xpcom18a4/ipc/ipcd/extensions/dconnect/src/ipcDConnectService.cpp:2979 #15 0x00007fb188431757 in nsThread::Main (arg=0x138d6b0) at /home/user/VirtualBox-4.3.20/src/libs/xpcom18a4/xpcom/threads/nsThread.cpp:118 #16 0x00007fb188441264 in _pt_root (arg=0x138d7a0) at /home/user/VirtualBox-4.3.20/src/libs/xpcom18a4/nsprpub/pr/src/pthreads/ptthread.c:224 #17 _pt_iprt_root (Thread=, pvUser=0x138d7a0) at /home/user/VirtualBox-4.3.20/src/libs/xpcom18a4/nsprpub/pr/src/pthreads/ptthread.c:272 #18 0x00007fb1889b1ec4 in rtThreadMain (pThread=0x138d910, NativeThread=140400347838208, pszThreadName=) at /home/user/VirtualBox-4.3.20/src/VBox/Runtime/common/misc/thread.cpp:712 #19 0x00007fb188a28fec in rtThreadNativeMain (pvArgs=0x138d910) at /home/user/VirtualBox-4.3.20/src/VBox/Runtime/r3/posix/thread-posix.cpp:324 #20 0x00007fb188d03182 in start_thread (arg=0x7fb180dbf700) at pthread_create.c:312 #21 0x00007fb187993efd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111 Thread 23 (Thread 0x7fb180d1a700 (LWP 19631)): #0 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185 #1 0x00007fb188a2c305 in rtSemEventMultiPosixWaitIndefinite (pThis=0x7fb17418e300, pSrcPos=, fFlags=) at /home/user/VirtualBox-4.3.20/src/VBox/Runtime/r3/linux/../posix/semeventmulti-posix.cpp:432 #2 0x00007fb188a2c998 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=0x7fb17418e300) at /home/user/VirtualBox-4.3.20/src/VBox/Runtime/r3/linux/../posix/semeventmulti-posix.cpp:606 #4 RTSemEventMultiWaitEx (hEventMultiSem=0x7fb17418e300, fFlags=80, uTimeout=) at /home/user/VirtualBox-4.3.20/src/VBox/Runtime/r3/linux/../posix/semeventmulti-posix.cpp:614 #5 0x00007fb1889f937e in rtCritSectRwEnterShared (pThis=0x7fb1740c9540, 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=0x7fb180d19870) at /home/user/VirtualBox-4.3.20/src/VBox/Main/glue/AutoLock.cpp:441 #7 0x0000000000621e2a in util::AutoLockBase::acquire (this=this@entry=0x7fb180d19870) at /home/user/VirtualBox-4.3.20/src/VBox/Main/glue/AutoLock.cpp:486 #8 0x000000000043cbd8 in util::AutoReadLock::AutoReadLock (this=0x7fb180d19870, aLockable=) at /home/user/VirtualBox-4.3.20/include/VBox/com/AutoLock.h:379 #9 0x00000000004c34db in Machine::detachAllMedia (this=0x7fb1744d6a90, writeLock=..., pSnapshot=pSnapshot@entry=0x7fb1744e9340, cleanupMode=cleanupMode@entry=3, llMedia=...) at /home/user/VirtualBox-4.3.20/src/VBox/Main/src-server/MachineImpl.cpp:11800 #10 0x0000000000547909 in Snapshot::uninitRecursively (this=this@entry=0x7fb1744e9340, writeLock=..., cleanupMode=cleanupMode@entry=3, llMedia=..., llFilenames=...) at /home/user/VirtualBox-4.3.20/src/VBox/Main/src-server/SnapshotImpl.cpp:914 #11 0x00000000004d5f27 in Machine::Unregister (this=0x7fb17449c200, cleanupMode=3, aMediaSize=0x7fb1200011e8, aMedia=0x7fb120001200) at /home/user/VirtualBox-4.3.20/src/VBox/Main/src-server/MachineImpl.cpp:5536 #12 0x00007fb18843dff4 in VBoxNsxpXPTC_InvokeByIndex (that=0x7fb17449c250, methodIndex=185, paramCount=, params=) at /home/user/VirtualBox-4.3.20/src/libs/xpcom18a4/xpcom/reflect/xptcall/src/md/unix/xptcinvoke_x86_64_linux.cpp:209 #13 0x00007fb18183e27d in ipcDConnectService::OnInvoke (this=0x137c5d0, peer=22, invoke=0x139e590, opLen=) at /home/user/VirtualBox-4.3.20/src/libs/xpcom18a4/ipc/ipcd/extensions/dconnect/src/ipcDConnectService.cpp:4079 #14 0x00007fb18183ec45 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 #15 0x00007fb18183ed81 in DConnectWorker::Run (this=0x1390d00) at /home/user/VirtualBox-4.3.20/src/libs/xpcom18a4/ipc/ipcd/extensions/dconnect/src/ipcDConnectService.cpp:2979 #16 0x00007fb188431757 in nsThread::Main (arg=0x1390d30) at /home/user/VirtualBox-4.3.20/src/libs/xpcom18a4/xpcom/threads/nsThread.cpp:118 #17 0x00007fb188441264 in _pt_root (arg=0x1391b20) at /home/user/VirtualBox-4.3.20/src/libs/xpcom18a4/nsprpub/pr/src/pthreads/ptthread.c:224 #18 _pt_iprt_root (Thread=, pvUser=0x1391b20) at /home/user/VirtualBox-4.3.20/src/libs/xpcom18a4/nsprpub/pr/src/pthreads/ptthread.c:272 #19 0x00007fb1889b1ec4 in rtThreadMain (pThread=0x1391c90, NativeThread=140400347162368, pszThreadName=) at /home/user/VirtualBox-4.3.20/src/VBox/Runtime/common/misc/thread.cpp:712 #20 0x00007fb188a28fec in rtThreadNativeMain (pvArgs=0x1391c90) at /home/user/VirtualBox-4.3.20/src/VBox/Runtime/r3/posix/thread-posix.cpp:324 #21 0x00007fb188d03182 in start_thread (arg=0x7fb180d1a700) at pthread_create.c:312 #22 0x00007fb187993efd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111