From d099eabbb7c0d493dbf6c665aceaf4738fc68d0e Mon Sep 17 00:00:00 2001
From: tenderlove <tenderlove@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Tue, 9 Apr 2019 23:48:17 +0000
Subject: Set a write barrier between iseq and mark objects

ISeq pins references in the mark array during compile, so it manually
marks references in the mark_ary.  This was causing write barrier
misses, so we need to add a write barrier when pushing on the mark
array.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@67489 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 compile.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/compile.c b/compile.c
index 46b8217e7e..96aece6ecc 100644
--- a/compile.c
+++ b/compile.c
@@ -574,6 +574,7 @@ static int
 iseq_add_mark_object_compile_time(const rb_iseq_t *iseq, VALUE v)
 {
     if (!SPECIAL_CONST_P(v)) {
+        rb_gc_writebarrier(iseq, v);
 	rb_ary_push(ISEQ_COMPILE_DATA(iseq)->mark_ary, v);
     }
     return COMPILE_OK;
@@ -583,6 +584,7 @@ static inline VALUE
 freeze_literal(rb_iseq_t *iseq, VALUE lit)
 {
     lit = rb_fstring(lit);
+    rb_gc_writebarrier(iseq, lit);
     rb_ary_push(ISEQ_COMPILE_DATA(iseq)->mark_ary, lit);
     return lit;
 }
-- 
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