<rdar://problem/13749871>

Improvements to the std::map data formatter to recognize when invalid memory is being explored and bail out instead of looping for a potentially very long time



git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@181044 91177308-0d34-0410-b5e6-96231b3b80d8
Harden against potential empty nodes in the map

git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@181045 91177308-0d34-0410-b5e6-96231b3b80d8
Fix logic error in ProcessInfo::SetArg0

git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@181049 91177308-0d34-0410-b5e6-96231b3b80d8