Add a general mechanism to wait on the debugger for Broadcasters of a given class/event bit set.

Use this to allow the lldb Driver to emit notifications for breakpoint modifications.
<rdar://problem/10619974>

llvm-svn: 150665

lldb/source/API/SBEvent.cpp

@@ -109,6 +109,16 @@ SBEvent::GetBroadcaster () const
     return broadcaster;
 }
 
+const char *
+SBEvent::GetBroadcasterClass () const
+{
+    const Event *lldb_event = get();
+    if (lldb_event)
+        return lldb_event->GetBroadcaster()->GetBroadcasterClass().AsCString();
+    else
+        return "unknown class";
+}
+
 bool
 SBEvent::BroadcasterMatchesPtr (const SBBroadcaster *broadcaster)
 {