1 files changed, 10 insertions, 2 deletions
diff --git a/ractor.c b/ractor.c
index 7996d1c275..bf19aa62d3 100644
--- a/ractor.c
+++ b/ractor.c
@@ -2368,7 +2368,11 @@ obj_traverse_i(VALUE obj, struct obj_traverse_data *data)
                 .stop = false,
                 .data = data,
             };
-            rb_objspace_reachable_objects_from(obj, obj_traverse_reachable_i, &d);
+            RB_VM_LOCK_ENTER_NO_BARRIER();
+            {
+                rb_objspace_reachable_objects_from(obj, obj_traverse_reachable_i, &d);
+            }
+            RB_VM_LOCK_LEAVE_NO_BARRIER();
             if (d.stop) return 1;
         }
         break;
@@ -2678,7 +2682,11 @@ static int
 obj_refer_only_shareables_p(VALUE obj)
 {
     int cnt = 0;
-    rb_objspace_reachable_objects_from(obj, obj_refer_only_shareables_p_i, &cnt);
+    RB_VM_LOCK_ENTER_NO_BARRIER();
+    {
+        rb_objspace_reachable_objects_from(obj, obj_refer_only_shareables_p_i, &cnt);
+    }
+    RB_VM_LOCK_LEAVE_NO_BARRIER();
     return cnt == 0;
 }