[vbox-dev] How to track the process of MainHGCMthread?

[Yao]

Hi,
 When I use the gbd to debug the VirtualBox, I can debug the process of VBoxSVC
 when the VirtualBox is produced, I can use the gdb to attach the process of VirtualBox which is the sub-thread of VBoxSVC.
But I cant' track the thread of MainHGCMthread which is the sub-thread of VirtualBox.
how can I track the process of MainHGCMthread by gdb? or better method?
Thanks
Yao
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