gc.c: flush all deferred finalizers

* gc.c (finalize_deferred): flush all deferred finalizers while other
  finalizers can get ready to run newly by lazy sweep.
  [ruby-core:58833] [Bug #9205]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43994 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 2 insertions, 3 deletions

diff --git a/gc.c b/gc.c
index a10c46f878..61812d051e 100644
--- a/gc.c
+++ b/gc.c
@@ -2055,10 +2055,9 @@ finalize_list(rb_objspace_t *objspace, RVALUE *p)
 static void
 finalize_deferred(rb_objspace_t *objspace)
 {
-    RVALUE *p = heap_pages_deferred_final;
-    heap_pages_deferred_final = 0;
+    RVALUE *p;
 
-    if (p) {
+    while ((p = ATOMIC_PTR_EXCHANGE(heap_pages_deferred_final, 0)) != 0) {
 	finalize_list(objspace, p);
     }
 }