VirtualBox is a general-purpose full virtualizer for x86 hardware. Targeted at server, desktop and embedded use, it is now the only professional-quality virtualization solution that is also Open Source Software.
Some of the features of VirtualBox are:
- Modularity. VirtualBox has an extremely modular design with well-defined internal programming interfaces and a client/server design. This makes it easy to control it from several interfaces at once: for example, you can start a virtual machine in a typical virtual machine GUI and then control that machine from the command line, or possibly remotely. VirtualBox also comes with a full Software Development Kit: even though it is Open Source Software, you don't have to hack the source to write a new interface for VirtualBox.
- Virtual machine descriptions in XML. The configuration settings of virtual machines are stored entirely in XML and are independent of the local machines. Virtual machine definitions can therefore easily be ported to other computers.
# The following items were fixed and/or added:
- VMM: fixed VERR_NOT_SUPPORTED and VERR_RAW_MODE_INVALID_SMP guru meditation due to an invalid reschedule to raw mode
- VMM: fixed PDMCritSectLeave guru meditation under rare circumstances with SMP guests
- VMM: proper Math Fault handling with certain legacy guests
- NAT: fixed a socket leak under certain conditions
- Storage: better sanity check against reading beyond end-of-file
- Audio: fixed a crash in the NUL audio backend (4.1.10 regression)
- HGCM: fixed a crash during savestate under rare circumstances
- Metrics: fixed an occasional crash during VM shutdown if host RAM/VMM metrics are enabled
- VBoxSVC: several locking fixes
- VBoxManage: return the correct error code if controlvm savestate failed
- Guest Additions: VBoxService should not crash on exit (4.1.10 regression)
- Windows Additions: set the correct time stamp when a file is closed
- Windows Additions: better help if the DirectX backups are not properly installed
- Linux Additions: Linux 3.4-rc1 compile fixes