--- a/hotspot/src/share/vm/memory/heap.cpp	Tue Dec 28 17:34:02 2010 -0800
+++ b/hotspot/src/share/vm/memory/heap.cpp	Wed Dec 29 10:41:43 2010 -0800
@@ -315,6 +315,15 @@
   return l;
 }
 
+size_t CodeHeap::largest_free_block() const {
+  size_t len = 0;
+  for (FreeBlock* b = _freelist; b != NULL; b = b->link()) {
+    if (b->length() > len)
+      len = b->length();
+  }
+  return size(len);
+}
+
 // Free list management
 
 FreeBlock *CodeHeap::following_block(FreeBlock *b) {