src/share/vm/oops/valueKlass.cpp

*** 40,56 ****
    }
    return NULL;
  }
  
  int ValueKlass::first_field_offset() {
!   // Really inefficient, should be cached somewhere
    instanceKlassHandle k(this);
    int first_offset = INT_MAX;
    for (JavaFieldStream fs(k()); !fs.done(); fs.next()) {
      if (fs.offset() < first_offset) first_offset= fs.offset();
    }
!   return first_offset;
  }
  
  bool ValueKlass::is_atomic() {
    return (nonstatic_field_size() * heapOopSize) <= longSize;
  }
--- 40,61 ----
    }
    return NULL;
  }
  
  int ValueKlass::first_field_offset() {
! #ifdef ASSERT
    instanceKlassHandle k(this);
    int first_offset = INT_MAX;
    for (JavaFieldStream fs(k()); !fs.done(); fs.next()) {
      if (fs.offset() < first_offset) first_offset= fs.offset();
    }
! #endif
!   int base_offset = instanceOopDesc::base_offset_in_bytes();
!   // The first field of value types is aligned on a long boundary
!   base_offset = align_size_up(base_offset, BytesPerLong);
!   assert(base_offset = first_offset, "inconsistent offsets");
!   return base_offset;
  }
  
  bool ValueKlass::is_atomic() {
    return (nonstatic_field_size() * heapOopSize) <= longSize;
  }