Added a function to the Host that gets a dummy target
for it, so that people who want to use LLDB as a
calculator can run simple expressions without needing
a target or process.


git-svn-id: https://llvm.org/svn/llvm-project/llvdb/trunk@143147 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/source/Host/common/Host.cpp b/source/Host/common/Host.cpp
index f88c76b..ebb15cc 100644
--- a/source/Host/common/Host.cpp
+++ b/source/Host/common/Host.cpp
@@ -10,6 +10,7 @@
 #include "lldb/Host/Host.h"
 #include "lldb/Core/ArchSpec.h"
 #include "lldb/Core/ConstString.h"
+#include "lldb/Core/Debugger.h"
 #include "lldb/Core/Error.h"
 #include "lldb/Core/Log.h"
 #include "lldb/Core/StreamString.h"
@@ -18,6 +19,7 @@
 #include "lldb/Host/FileSpec.h"
 #include "lldb/Host/Mutex.h"
 #include "lldb/Target/Process.h"
+#include "lldb/Target/TargetList.h"
 
 #include "llvm/Support/Host.h"
 #include "llvm/Support/MachO.h"
@@ -1165,6 +1167,24 @@
 }
 #endif
 
+lldb::TargetSP
+Host::GetDummyTarget (lldb_private::Debugger &debugger)
+{
+    static TargetSP dummy_target;
+    
+    if (!dummy_target)
+    {
+        Error err = debugger.GetTargetList().CreateTarget(debugger, 
+                                                          FileSpec(), 
+                                                          Host::GetTargetTriple().AsCString(), 
+                                                          false, 
+                                                          NULL, 
+                                                          dummy_target);
+    }
+    
+    return dummy_target;
+}
+
 #if !defined (__APPLE__)
 bool
 Host::OpenFileInExternalEditor (const FileSpec &file_spec, uint32_t line_no)