$ gdb /usr/lib/virtualbox/VBoxSVC GNU gdb (Gentoo 7.2 p1) 7.2 Copyright (C) 2010 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "i686-pc-linux-gnu". For bug reporting instructions, please see: ... Reading symbols from /usr/lib/virtualbox/VBoxSVC...done. (gdb) r Starting program: /usr/lib/virtualbox/VBoxSVC [Thread debugging using libthread_db enabled] [New Thread 0xb749eb70 (LWP 17936)] [Thread 0xb749eb70 (LWP 17936) exited] [New Thread 0xb749eb70 (LWP 17940)] [New Thread 0xb740db70 (LWP 17941)] [New Thread 0xb7110b70 (LWP 17942)] ****************************************************** Oracle VM VirtualBox XPCOM Server Version 4.0.8-Gentoo (C) 2008-2011 Oracle Corporation All rights reserved. Starting event loop.... [press Ctrl-C to quit] [New Thread 0xb708eb70 (LWP 17972)] VBoxNetAdpCtl: ioctl failed for /dev/vboxnetctl: Invalid argument [New Thread 0xb700bb70 (LWP 17977)] [New Thread 0xb6f8ab70 (LWP 17978)] Informational: VirtualBox object created (rc=NS_OK). [New Thread 0xb6f09b70 (LWP 17980)] [New Thread 0xb6ee8b70 (LWP 17983)] [New Thread 0xb6ec7b70 (LWP 17996)] [Thread 0xb6ec7b70 (LWP 17996) exited] [New Thread 0xb6ec7b70 (LWP 18021)] [Thread 0xb6ec7b70 (LWP 18021) exited] [New Thread 0xb6ec7b70 (LWP 18033)] [Thread 0xb6ec7b70 (LWP 18033) exited] [New Thread 0xb6e46b70 (LWP 18061)] [New Thread 0xb6ec7b70 (LWP 18063)] [Thread 0xb6ec7b70 (LWP 18063) exited] [New Thread 0xb6ec7b70 (LWP 18075)] [Thread 0xb6ec7b70 (LWP 18075) exited] [New Thread 0xb6ec7b70 (LWP 18118)] [Thread 0xb6ec7b70 (LWP 18118) exited] [New Thread 0xb6ec7b70 (LWP 18130)] [Thread 0xb6ec7b70 (LWP 18130) exited] [New Thread 0xb6ec7b70 (LWP 18154)] [Thread 0xb6ec7b70 (LWP 18154) exited] [New Thread 0xb6ec7b70 (LWP 18166)] [Thread 0xb6ec7b70 (LWP 18166) exited] [New Thread 0xb6ec7b70 (LWP 18212)] [Thread 0xb6ec7b70 (LWP 18212) exited] [New Thread 0xb6ec7b70 (LWP 18236)] Program received signal SIGSEGV, Segmentation fault. [Switching to Thread 0xb6ec7b70 (LWP 18236)] 0x08137bc2 in std::list, std::allocator > >::remove(ComObjPtr const&) () (gdb) bt #0 0x08137bc2 in std::list, std::allocator > >::remove(ComObjPtr const&) () #1 0x08133103 in SessionMachine::restoreSnapshotHandler (this=0x83cbb50, aTask=...) at /var/tmp/portage/app-emulation/virtualbox-4.0.8/work/VirtualBox-4.0.8_OSE/src/VBox/Main/src-server/SnapshotImpl.cpp:1980 #2 0x08138cf8 in SessionMachine::RestoreSnapshotTask::handler() () #3 0x0812cdc6 in SessionMachine::taskHandler (pvUser=0x829e8f0) at /var/tmp/portage/app-emulation/virtualbox-4.0.8/work/VirtualBox-4.0.8_OSE/src/VBox/Main/src-server/SnapshotImpl.cpp:1301 #4 0xb7ebb73e in rtThreadMain (pThread=0x83cc5c8, NativeThread=3068951408, pszThreadName=0x83ccb54 "RestoreSnap") at /var/tmp/portage/app-emulation/virtualbox-4.0.8/work/VirtualBox-4.0.8_OSE/src/VBox/Runtime/common/misc/thread.cpp:680 #5 0xb7f05a72 in rtThreadNativeMain (pvArgs=0x83cc5c8) at /var/tmp/portage/app-emulation/virtualbox-4.0.8/work/VirtualBox-4.0.8_OSE/src/VBox/Runtime/r3/posix/thread-posix.cpp:258 #6 0xb7f66c43 in start_thread () from /lib/libpthread.so.0 #7 0xb7b937fe in clone () from /lib/libc.so.6 (gdb) c Continuing. [Thread 0xb6ec7b70 (LWP 18236) exited] [Thread 0xb6e46b70 (LWP 18061) exited] [Thread 0xb6ee8b70 (LWP 17983) exited] [Thread 0xb6f09b70 (LWP 17980) exited] [Thread 0xb6f8ab70 (LWP 17978) exited] [Thread 0xb700bb70 (LWP 17977) exited] [Thread 0xb708eb70 (LWP 17972) exited] [Thread 0xb7110b70 (LWP 17942) exited] [Thread 0xb740db70 (LWP 17941) exited] [Thread 0xb749eb70 (LWP 17940) exited] Program terminated with signal SIGSEGV, Segmentation fault. The program no longer exists. (gdb) q $