src/hotspot/share/memory/universe.cpp

rev 64188 : Rework xxx::verify() functions

*** 146,155 ****
--- 146,156 ----
  
  OopStorage*     Universe::_vm_weak = NULL;
  OopStorage*     Universe::_vm_global = NULL;
  
  CollectedHeap*  Universe::_collectedHeap = NULL;
+ intptr_t        Universe::_non_heap_offset = 0;
  
  objArrayOop Universe::the_empty_class_array ()  {
    return (objArrayOop)_the_empty_class_array.resolve();
  }
  
*** 851,860 ****
--- 852,868 ----
        CompressedOops::initialize(total_rs);
      }
  
      Universe::calculate_verify_data((HeapWord*)total_rs.base(), (HeapWord*)total_rs.end());
  
+     // Make sure oop + offset is past the Java heap, plus some random positive offset.
+     // The offset should not hide the real alignment up to object alignment or cache line size.
+     intptr_t non_heap_offset = (intptr_t) total_rs.size() + abs(os::random());
+     non_heap_offset = align_up(non_heap_offset, MinObjAlignmentInBytes);
+     non_heap_offset = align_up(non_heap_offset, VM_Version::L1_data_cache_line_size());
+     Universe::_non_heap_offset = non_heap_offset;
+ 
      return total_rs;
    }
  
    vm_exit_during_initialization(
      err_msg("Could not reserve enough space for " SIZE_FORMAT "KB object heap",