From 1096be5ac6540c204047c7c9e6d58bfcef90e167 Mon Sep 17 00:00:00 2001
From: shyouhei <shyouhei@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Fri, 4 May 2018 15:18:42 +0000
Subject: [PATCH] passing rb_thread_sleep to rb_protect is IMHO dangerous

rb_thread_sleep's argument is int, while rb_protect expects the function
to take VALUE. Depending on ABI this could be a problem.

We should wrap rb_thread_sleep here.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@63339 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 process.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/process.c b/process.c
index b6a0245163..a1154bda8e 100644
--- a/process.c
+++ b/process.c
@@ -3270,6 +3270,13 @@ pipe_nocrash(int filedes[2], VALUE fds)
 #define O_BINARY 0
 #endif
 
+static VALUE
+rb_thread_sleep_that_takes_VALUE_as_sole_argument(VALUE n)
+{
+    rb_thread_sleep(NUM2INT(n));
+    return Qundef;
+}
+
 static int
 handle_fork_error(int err, int *status, int *ep, volatile int *try_gc_p)
 {
@@ -3291,7 +3298,7 @@ handle_fork_error(int err, int *status, int *ep, volatile int *try_gc_p)
             return 0;
         }
         else {
-            rb_protect((VALUE (*)())rb_thread_sleep, 1, &state);
+            rb_protect(rb_thread_sleep_that_takes_VALUE_as_sole_argument, 1, &state);
             if (status) *status = state;
             if (!state) return 0;
         }