%X => %_X, %_X => %__X

src/runtime.cc

Index: src/runtime.cc
diff --git a/src/runtime.cc b/src/runtime.cc
index e8003b6731cc77740ed36596a90a59fcfe957027..8c9979bcdb5e07c751b12ebabc3aec73a8fe47cc 100644
--- a/src/runtime.cc
+++ b/src/runtime.cc
@@ -13270,10 +13270,10 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_ListNatives) {
     /* Inline runtime functions have an underscore in front of the name. */  \
     if (inline_runtime_functions) {                                          \
       name = factory->NewStringFromAscii(                                    \
-          Vector<const char>("_" #Name, StrLength("_" #Name)));              \
+          Vector<const char>("__" #Name, StrLength("__" #Name)));            \
     } else {                                                                 \
       name = factory->NewStringFromAscii(                                    \
-          Vector<const char>(#Name, StrLength(#Name)));                      \
+          Vector<const char>("_" #Name, StrLength("_" #Name)));              \
     }                                                                        \
     Handle<FixedArray> pair_elements = factory->NewFixedArray(2);            \
     pair_elements->set(0, *name);                                            \
@@ -13442,13 +13442,13 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_ObjectHashTableSet) {
 // Implementation of Runtime
 
 #define F(name, number_of_args, result_size)                             \
-  { Runtime::k##name, Runtime::RUNTIME, #name,   \
+  { Runtime::k##name, Runtime::RUNTIME, "_" #name,   \
     FUNCTION_ADDR(Runtime_##name), number_of_args, result_size },
 
 
 #define I(name, number_of_args, result_size)                             \
   { Runtime::kInline##name, Runtime::INLINE,     \
-    "_" #name, NULL, number_of_args, result_size },
+    "__" #name, NULL, number_of_args, result_size },
 
 static const Runtime::Function kIntrinsicFunctions[] = {
   RUNTIME_FUNCTION_LIST(F)