Fix a race condition in pthread_join(). All of the following must occur

atomically:

1) Search _thread_list for the thread to join.
2) Search _dead_list for the thread to join.
3) Set the running thread as the joiner.

While we're at it, fix a race in the case where multiple threads try to
join on the same thread.  POSIX says that the behavior of multiple joiners
is undefined, but the fix is cheap as a result of the other fix.

1 files changed, 0 insertions, 1 deletions

diff --git a/lib/libc_r/uthread/pthread_private.h b/lib/libc_r/uthread/pthread_private.h
index 3bfb7c0..6528c13 100644
--- a/lib/libc_r/uthread/pthread_private.h
+++ b/lib/libc_r/uthread/pthread_private.h
@@ -1207,7 +1207,6 @@ char    *__ttyname_r_basic(int, char *, size_t);
 char    *ttyname_r(int, char *, size_t);
 void	_cond_wait_backout(pthread_t);
 void	_fd_lock_backout(pthread_t);
-int     _find_dead_thread(pthread_t);
 int     _find_thread(pthread_t);
 struct pthread *_get_curthread(void);
 void	_set_curthread(struct pthread *);