Make these functions cancellation points like they should be:

poll(2), readv(2), select(2), wait4(2), writev(2).

PR:		bin/37658
Reviewed by:	deischen
MFC after:	1 week

1 files changed, 13 insertions, 1 deletions

diff --git a/lib/libpthread/thread/thr_writev.c b/lib/libpthread/thread/thr_writev.c
index c084cd0..ec77258 100644
--- a/lib/libpthread/thread/thr_writev.c
+++ b/lib/libpthread/thread/thr_writev.c
@@ -42,7 +42,7 @@
 #include <pthread.h>
 #include "pthread_private.h"
 
-__weak_reference(_writev, writev);
+__weak_reference(__writev, writev);
 
 ssize_t
 _writev(int fd, const struct iovec * iov, int iovcnt)
@@ -202,3 +202,15 @@ _writev(int fd, const struct iovec * iov, int iovcnt)
 
 	return (ret);
 }
+
+ssize_t
+__writev(int fd, const struct iovec *iov, int iovcnt)
+{
+	ssize_t ret;
+
+	_thread_enter_cancellation_point();
+	ret = _writev(fd, iov, iovcnt);
+	_thread_leave_cancellation_point();
+
+	return ret;
+}