[lldb] Remove extern "C" from lldb-swig-lua interface

This is the lua equivalent of 9a14ade.

Author: labath

lldb/bindings/lua/lua-wrapper.swig

@@ -4,26 +4,9 @@ template <typename T>
 void
 PushSBClass(lua_State* L, T* obj);
 
-%}
-
-%runtime %{
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-void LLDBSwigLuaCallLuaLogOutputCallback(const char *str, void *baton);
-int LLDBSwigLuaCloseFileHandle(lua_State *L);
-
-#ifdef __cplusplus
-}
-#endif
-%}
-
-%wrapper %{
-
 // This function is called from Lua::CallBreakpointCallback
-SWIGEXPORT llvm::Expected<bool>
-LLDBSwigLuaBreakpointCallbackFunction
+llvm::Expected<bool>
+lldb_private::LLDBSwigLuaBreakpointCallbackFunction
 (
    lua_State *L,
    lldb::StackFrameSP stop_frame_sp,
@@ -67,8 +50,8 @@ LLDBSwigLuaBreakpointCallbackFunction
 }
 
 // This function is called from Lua::CallWatchpointCallback
-SWIGEXPORT llvm::Expected<bool>
-LLDBSwigLuaWatchpointCallbackFunction
+llvm::Expected<bool>
+lldb_private::LLDBSwigLuaWatchpointCallbackFunction
 (
    lua_State *L,
    lldb::StackFrameSP stop_frame_sp,
@@ -101,7 +84,7 @@ LLDBSwigLuaWatchpointCallbackFunction
    return stop;
 }
 
-SWIGEXPORT void
+static void
 LLDBSwigLuaCallLuaLogOutputCallback(const char *str, void *baton) {
    lua_State *L = (lua_State *)baton;
 
@@ -113,7 +96,7 @@ LLDBSwigLuaCallLuaLogOutputCallback(const char *str, void *baton) {
    lua_pcall(L, 1, 0, 0);
 }
 
-int LLDBSwigLuaCloseFileHandle(lua_State *L) {
+static int LLDBSwigLuaCloseFileHandle(lua_State *L) {
    return luaL_error(L, "You cannot close a file handle used by lldb.");
 }
 

lldb/bindings/lua/lua.swig

@@ -17,6 +17,7 @@
 #include "llvm/Support/Error.h"
 #include "llvm/Support/FormatVariadic.h"
 #include "../bindings/lua/lua-swigsafecast.swig"
+#include "../source/Plugins/ScriptInterpreter/Lua/SWIGLuaBridge.h"
 
 // required headers for typemaps
 #include "lldb/Host/File.h"

lldb/source/Plugins/ScriptInterpreter/Lua/Lua.cpp

@@ -7,6 +7,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "Lua.h"
+#include "SWIGLuaBridge.h"
 #include "lldb/Host/FileSystem.h"
 #include "lldb/Utility/FileSpec.h"
 #include "llvm/Support/Error.h"
@@ -15,30 +16,6 @@
 using namespace lldb_private;
 using namespace lldb;
 
-#pragma clang diagnostic push
-#pragma clang diagnostic ignored "-Wreturn-type-c-linkage"
-
-// Disable warning C4190: 'LLDBSwigPythonBreakpointCallbackFunction' has
-// C-linkage specified, but returns UDT 'llvm::Expected<bool>' which is
-// incompatible with C
-#if _MSC_VER
-#pragma warning (push)
-#pragma warning (disable : 4190)
-#endif
-
-extern "C" llvm::Expected<bool> LLDBSwigLuaBreakpointCallbackFunction(
-    lua_State *L, lldb::StackFrameSP stop_frame_sp,
-    lldb::BreakpointLocationSP bp_loc_sp, StructuredDataImpl *extra_args_impl);
-
-extern "C" llvm::Expected<bool> LLDBSwigLuaWatchpointCallbackFunction(
-    lua_State *L, lldb::StackFrameSP stop_frame_sp, lldb::WatchpointSP wp_sp);
-
-#if _MSC_VER
-#pragma warning (pop)
-#endif
-
-#pragma clang diagnostic pop
-
 static int lldb_print(lua_State *L) {
   int n = lua_gettop(L);
   lua_getglobal(L, "io");

lldb/unittests/ScriptInterpreter/Lua/LuaTests.cpp

@@ -7,40 +7,24 @@
 //===----------------------------------------------------------------------===//
 
 #include "Plugins/ScriptInterpreter/Lua/Lua.h"
+#include "Plugins/ScriptInterpreter/Lua/SWIGLuaBridge.h"
 #include "gtest/gtest.h"
 
 using namespace lldb_private;
 
 extern "C" int luaopen_lldb(lua_State *L) { return 0; }
 
-#pragma clang diagnostic push
-#pragma clang diagnostic ignored "-Wreturn-type-c-linkage"
-
-// Disable warning C4190: 'LLDBSwigPythonBreakpointCallbackFunction' has
-// C-linkage specified, but returns UDT 'llvm::Expected<bool>' which is
-// incompatible with C
-#if _MSC_VER
-#pragma warning (push)
-#pragma warning (disable : 4190)
-#endif
-
-extern "C" llvm::Expected<bool> LLDBSwigLuaBreakpointCallbackFunction(
+llvm::Expected<bool> lldb_private::LLDBSwigLuaBreakpointCallbackFunction(
     lua_State *L, lldb::StackFrameSP stop_frame_sp,
     lldb::BreakpointLocationSP bp_loc_sp, StructuredDataImpl *extra_args_impl) {
   return false;
 }
 
-extern "C" llvm::Expected<bool> LLDBSwigLuaWatchpointCallbackFunction(
+llvm::Expected<bool> lldb_private::LLDBSwigLuaWatchpointCallbackFunction(
     lua_State *L, lldb::StackFrameSP stop_frame_sp, lldb::WatchpointSP wp_sp) {
   return false;
 }
 
-#if _MSC_VER
-#pragma warning (pop)
-#endif
-
-#pragma clang diagnostic pop
-
 TEST(LuaTest, RunValid) {
   Lua lua;
   llvm::Error error = lua.Run("foo = 1");