gc.c: promote long-lived NODE_CREF objects to oldgen

* include/ruby/ruby.h: add RGENGC_WB_PROTECTED_NODE_CREF setting
  In a large app, this reduces the size of
  remembered_shady_object_count by 80%. [Bug #9225] [ruby-core:58947]
* gc.c (rb_node_newnode): add FL_WB_PROTECTED flag to NODE_CREF
* class.c (rewrite_cref_stack): insert OBJ_WRITE for NODE_CREF
* iseq.c (set_relation): ditto
* iseq.c (rb_iseq_clone): ditto
* vm_eval.c (rb_yield_refine_block): ditto
* vm_insnhelper.c (vm_cref_push): ditto
* vm_insnhelper.h (COPY_CREF): ditto

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@44059 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 1 deletions

diff --git a/class.c b/class.c
index 7e036936b7..66495eb676 100644
--- a/class.c
+++ b/class.c
@@ -239,7 +239,7 @@ rewrite_cref_stack(NODE *node, VALUE old_klass, VALUE new_klass, NODE **new_cref
     while (node) {
 	if (node->nd_clss == old_klass) {
 	    new_node = NEW_CREF(new_klass);
-	    new_node->nd_next = node->nd_next;
+	    OBJ_WRITE(new_node, &new_node->nd_next, node->nd_next);
 	    *new_cref_ptr = new_node;
 	    return;
 	}