src/share/vm/runtime/arguments.cpp

@@ -1657,10 +1657,14 @@
   assert(is_power_of_2(ObjectAlignmentInBytes), "ObjectAlignmentInBytes must be power of 2");
   MinObjAlignmentInBytes     = ObjectAlignmentInBytes;
   assert(MinObjAlignmentInBytes >= HeapWordsPerLong * HeapWordSize, "ObjectAlignmentInBytes value is too small");
   MinObjAlignment            = MinObjAlignmentInBytes / HeapWordSize;
   assert(MinObjAlignmentInBytes == MinObjAlignment * HeapWordSize, "ObjectAlignmentInBytes value is incorrect");
+
+  assert (is_power_of_2(MinObjAlignment), "extra sanity");
+  assert (is_power_of_2(MinObjAlignmentInBytes), "extra sanity");
+  MinObjAlignmentMask        = MinObjAlignment - 1;
   MinObjAlignmentInBytesMask = MinObjAlignmentInBytes - 1;
 
   LogMinObjAlignmentInBytes  = exact_log2(ObjectAlignmentInBytes);
   LogMinObjAlignment         = LogMinObjAlignmentInBytes - LogHeapWordSize;