8229437: assert(is_aligned(ref, HeapWordSize)) failed: invariant

Reviewed-by: egahlin

Author: Markus Grönlund

src/hotspot/share/jfr/leakprofiler/chains/bfsClosure.cpp

@@ -230,8 +230,6 @@ void BFSClosure::do_oop(narrowOop* ref) {
 
 void BFSClosure::do_root(const oop* ref) {
   assert(ref != NULL, "invariant");
-  assert(is_aligned(ref, HeapWordSize), "invariant");
-  assert(*ref != NULL, "invariant");
   if (!_edge_queue->is_full()) {
     _edge_queue->add(NULL, ref);
   }

src/hotspot/share/jfr/leakprofiler/chains/dfsClosure.cpp

@@ -178,8 +178,7 @@ void DFSClosure::do_oop(narrowOop* ref) {
 
 void DFSClosure::do_root(const oop* ref) {
   assert(ref != NULL, "invariant");
-  assert(is_aligned(ref, HeapWordSize), "invariant");
-  const oop pointee = *ref;
+  const oop pointee = UnifiedOop::dereference(ref);
   assert(pointee != NULL, "invariant");
   closure_impl(ref, pointee);
 }