diff -r 5d855d021755 -r 0982ec23da03 src/share/vm/utilities/ostream.cpp
--- a/src/share/vm/utilities/ostream.cpp	Wed Jun 25 15:51:15 2014 -0700
+++ b/src/share/vm/utilities/ostream.cpp	Thu Jun 19 13:31:14 2014 +0200
@@ -24,6 +24,7 @@
 
 #include "precompiled.hpp"
 #include "compiler/compileLog.hpp"
+#include "gc_implementation/shared/gcId.hpp"
 #include "oops/oop.inline.hpp"
 #include "runtime/arguments.hpp"
 #include "utilities/defaultStream.hpp"
@@ -240,6 +241,14 @@
   return;
 }
 
+void outputStream::gclog_stamp(const GCId& gc_id) {
+  date_stamp(PrintGCDateStamps);
+  stamp(PrintGCTimeStamps);
+  if (PrintGCID) {
+    print("#%u: ", gc_id.id());
+  }
+}
+
 outputStream& outputStream::indent() {
   while (_position < _indentation) sp();
   return *this;