Copying GC support for EXIVAR

Instance variables held in gen_ivtbl are marked with rb_gc_mark.  It
prevents the referenced objects from moving, which is bad for copying
garbage collectors.

This commit allows those instance variables to be updated during
gc_update_object_references.

1 files changed, 5 insertions, 1 deletions

diff --git a/gc.c b/gc.c
index 82590b9234..269d46daef 100644
--- a/gc.c
+++ b/gc.c
@@ -7232,7 +7232,7 @@ gc_mark_children(rb_objspace_t *objspace, VALUE obj)
     gc_mark_set_parent(objspace, obj);
 
     if (FL_TEST(obj, FL_EXIVAR)) {
-        rb_mark_generic_ivar(obj);
+        rb_mark_and_update_generic_ivar(obj);
     }
 
     switch (BUILTIN_TYPE(obj)) {
@@ -10560,6 +10560,10 @@ gc_update_object_references(rb_objspace_t *objspace, VALUE obj)
 
     gc_report(4, objspace, "update-refs: %p ->\n", (void *)obj);
 
+    if (FL_TEST(obj, FL_EXIVAR)) {
+        rb_mark_and_update_generic_ivar(obj);
+    }
+
     switch (BUILTIN_TYPE(obj)) {
       case T_CLASS:
       case T_MODULE: