From 7727b22eb1dd2aab3127a0b4fdb6ee52aedf358e Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Mon, 30 Apr 2018 02:17:03 +0000
Subject: io.c: workaround for EPROTOTYPE

* io.c (internal_write_func, internal_writev_func): retry at
  unexpected EPROTOTYPE on macOS, to get rid of a kernel bug.
  [ruby-core:86690] [Bug #14713]

* ext/socket/init.c (rsock_{sendto,send,write}_blocking): ditto.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@63304 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 ext/socket/init.c | 26 ++++++++++++++++++++++----
 1 file changed, 22 insertions(+), 4 deletions(-)

(limited to 'ext/socket')

diff --git a/ext/socket/init.c b/ext/socket/init.c
index 3b22c1308b..c26ab135ab 100644
--- a/ext/socket/init.c
+++ b/ext/socket/init.c
@@ -68,6 +68,12 @@ is_socket(int fd)
 }
 #endif
 
+#if defined __APPLE__
+# define do_write_retry(code) do {ret = code;} while (ret == -1 && errno == EPROTOTYPE)
+#else
+# define do_write_retry(code) ret = code
+#endif
+
 VALUE
 rsock_init_sock(VALUE sock, int fd)
 {
@@ -95,8 +101,10 @@ rsock_sendto_blocking(void *data)
 {
     struct rsock_send_arg *arg = data;
     VALUE mesg = arg->mesg;
-    return (VALUE)sendto(arg->fd, RSTRING_PTR(mesg), RSTRING_LEN(mesg),
-                         arg->flags, arg->to, arg->tolen);
+    ssize_t ret;
+    do_write_retry(sendto(arg->fd, RSTRING_PTR(mesg), RSTRING_LEN(mesg),
+			  arg->flags, arg->to, arg->tolen));
+    return (VALUE)ret;
 }
 
 VALUE
@@ -104,8 +112,10 @@ rsock_send_blocking(void *data)
 {
     struct rsock_send_arg *arg = data;
     VALUE mesg = arg->mesg;
-    return (VALUE)send(arg->fd, RSTRING_PTR(mesg), RSTRING_LEN(mesg),
-                       arg->flags);
+    ssize_t ret;
+    do_write_retry(send(arg->fd, RSTRING_PTR(mesg), RSTRING_LEN(mesg),
+			arg->flags));
+    return (VALUE)ret;
 }
 
 struct recvfrom_arg {
@@ -378,10 +388,18 @@ rsock_write_nonblock(VALUE sock, VALUE str, VALUE ex)
 	rb_io_flush(sock);
     }
 
+#ifdef __APPLE__
+  again:
+#endif
     n = (long)send(fptr->fd, RSTRING_PTR(str), RSTRING_LEN(str), MSG_DONTWAIT);
     if (n < 0) {
 	int e = errno;
 
+#ifdef __APPLE__
+	if (e == EPROTOTYPE) {
+	    goto again;
+	}
+#endif
 	if (e == EWOULDBLOCK || e == EAGAIN) {
 	    if (ex == Qfalse) return sym_wait_writable;
 	    rb_readwrite_syserr_fail(RB_IO_WAIT_WRITABLE, e,
-- 
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