Previously using HostThread::GetNativeThread() required an ugly
cast to most-derived type. This solves the issue by simply returning
the derived type directly.
llvm-svn: 222185
This creates a TargetThreadWindows class and updates the thread
list of the Process with the main thread. Additionally, we
fill out a few more overrides of Process base class methods. We
do not yet update the thread list as threads are created and/or
destroyed, and we do not yet propagate stop reasons to threads as
their states change.
llvm-svn: 222148