src/share/vm/memory/allocation.hpp

*** 35,44 ****
--- 35,49 ----
  #include "opto/c2_globals.hpp"
  #endif
  
  #include <new>
  
+ // The byte alignment to be used by Arena::Amalloc.  See bugid 4169348.
+ // Note: this value must be a power of 2
+ 
+ #define ARENA_AMALLOC_ALIGNMENT (2*BytesPerWord)
+ 
  #define ARENA_ALIGN_M1 (((size_t)(ARENA_AMALLOC_ALIGNMENT)) - 1)
  #define ARENA_ALIGN_MASK (~((size_t)ARENA_ALIGN_M1))
  #define ARENA_ALIGN(x) ((((size_t)(x)) + ARENA_ALIGN_M1) & ARENA_ALIGN_MASK)
  
  class AllocFailStrategy {