--- old/src/share/vm/memory/allocation.inline.hpp	Fri Feb  4 08:47:24 2011
+++ new/src/share/vm/memory/allocation.inline.hpp	Fri Feb  4 08:47:24 2011
@@ -32,6 +32,12 @@
 void trace_heap_malloc(size_t size, const char* name, void *p);
 void trace_heap_free(void *p);
 
+inline void inc_stat_counter(volatile julong* dest, julong add_value) {
+  // Increments unsigned long value (not atomic on MP).
+  julong value = Atomic::load((volatile jlong*)dest);
+  value += add_value;
+  Atomic::store((jlong)value, (volatile jlong*)dest);
+}
 
 // allocate using malloc; will fail if no memory available
 inline char* AllocateHeap(size_t size, const char* name = NULL) {