--- a/src/hotspot/share/classfile/vmSymbols.hpp	Mon Nov 27 20:35:56 2017 -0500
+++ b/src/hotspot/share/classfile/vmSymbols.hpp	Mon Nov 27 20:21:34 2017 -0800
@@ -26,7 +26,6 @@
 #define SHARE_VM_CLASSFILE_VMSYMBOLS_HPP
 
 #include "classfile/moduleEntry.hpp"
-#include "classfile/vmSymbols_ext.hpp"
 #include "oops/symbol.hpp"
 #include "memory/iterator.hpp"
 #include "trace/traceMacros.hpp"
@@ -673,8 +672,12 @@
   /* trace signatures */                                                                                          \
   TRACE_TEMPLATES(template)                                                                                       \
                                                                                                                   \
-  /* extensions */                                                                                                \
-  VM_SYMBOLS_DO_EXT(template, do_alias)                                                                           \
+  /* cds */                                                                                                       \
+  template(jdk_internal_loader_ClassLoaders,       "jdk/internal/loader/ClassLoaders")                            \
+  template(jdk_vm_cds_SharedClassInfo,             "jdk/vm/cds/SharedClassInfo")                                  \
+  template(url_void_signature,                     "(Ljava/net/URL;)V")                                           \
+  template(toFileURL_name,                         "toFileURL")                                                   \
+  template(toFileURL_signature,                    "(Ljava/lang/String;)Ljava/net/URL;")                          \
                                                                                                                   \
   /*end*/