1 files changed, 8 insertions, 0 deletions
diff --git a/vm.c b/vm.c
index 3e775f8a5f..a30ba9c046 100644
--- a/vm.c
+++ b/vm.c
@@ -995,6 +995,7 @@ collect_outer_variable_names(ID id, VALUE val, void *ptr)
 }
 
 VALUE rb_ractor_make_shareable(VALUE obj);
+VALUE rb_ractor_ensure_shareable(VALUE obj, VALUE name);
 
 static const rb_env_t *
 env_copy(const VALUE *src_ep, VALUE read_only_variables)
@@ -3181,6 +3182,12 @@ m_core_make_shareable(VALUE recv, VALUE obj)
 }
 
 static VALUE
+m_core_ensure_shareable(VALUE recv, VALUE obj, VALUE name)
+{
+    return rb_ractor_ensure_shareable(obj, name);
+}
+
+static VALUE
 core_hash_merge_kwd(VALUE hash, VALUE kw)
 {
     rb_hash_foreach(rb_to_hash_type(kw), kwmerge_i, hash);
@@ -3345,6 +3352,7 @@ Init_VM(void)
     rb_define_method_id(klass, idProc, f_proc, 0);
     rb_define_method_id(klass, idLambda, f_lambda, 0);
     rb_define_method(klass, "make_shareable", m_core_make_shareable, 1);
+    rb_define_method(klass, "ensure_shareable", m_core_ensure_shareable, 2);
     rb_obj_freeze(fcore);
     RBASIC_CLEAR_CLASS(klass);
     rb_obj_freeze(klass);