diff -r 38569792a45a -r f52ed367b66d src/share/vm/runtime/sweeper.hpp
--- a/src/share/vm/runtime/sweeper.hpp	Mon May 16 14:21:16 2011 -0700
+++ b/src/share/vm/runtime/sweeper.hpp	Mon May 16 22:16:44 2011 -0700
@@ -57,6 +57,13 @@
  public:
   static long traversal_count() { return _traversals; }
 
+#ifdef ASSERT
+  // Keep track of sweeper activity in the ring buffer
+  static void record_sweep(nmethod* nm, int line);
+  static void report_events(int id, address entry);
+  static void report_events();
+#endif
+
   static void scan_stacks();      // Invoked at the end of each safepoint
   static void sweep_code_cache(); // Concurrent part of sweep job
   static void possibly_sweep();   // Compiler threads call this to sweep