Add stub FreeBSD ProcessMonitor::ReadThreadPointer

llvm-svn: 192994
diff --git a/lldb/source/Plugins/Process/FreeBSD/ProcessMonitor.h b/lldb/source/Plugins/Process/FreeBSD/ProcessMonitor.h
index 1f28f7d..4a9b483 100644
--- a/lldb/source/Plugins/Process/FreeBSD/ProcessMonitor.h
+++ b/lldb/source/Plugins/Process/FreeBSD/ProcessMonitor.h
@@ -160,6 +160,10 @@
     bool
     WriteRegisterSet(lldb::tid_t tid, void *buf, size_t buf_size, unsigned int regset);
 
+    /// Reads the value of the thread-specific pointer for a given thread ID.
+    bool
+    ReadThreadPointer(lldb::tid_t tid, lldb::addr_t &value);
+
     /// Writes a ptrace_lwpinfo structure corresponding to the given thread ID
     /// to the memory region pointed to by @p lwpinfo.
     bool