src/share/vm/gc/g1/g1BlockOffsetTable.cpp

rev 12060 : imported patch block_start_acquire

@@ -225,11 +225,11 @@
   if (addr >= _space->top()) return _space->top();
   while (next_boundary < addr) {
     while (n <= next_boundary) {
       q = n;
       oop obj = oop(q);
-      if (obj->klass_or_null() == NULL) return q;
+      if (obj->klass_or_null_acquire() == NULL) return q;
       n += block_size(q);
     }
     assert(q <= next_boundary && n > next_boundary, "Consequence of loop");
     // [q, n) is the block that crosses the boundary.
     alloc_block_work(&next_boundary, &next_index, q, n);