[src/trunk]: src/lib/libpthread Reinit TSD mutex in the child to avoid issues...

[joerg <joerg%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/8d8de3318b6a
branches:  trunk
changeset: 1009300:8d8de3318b6a
user:      joerg <joerg%NetBSD.org@localhost>
date:      Sun Apr 19 20:46:04 2020 +0000

description:
Reinit TSD mutex in the child to avoid issues with former waiters

diffstat:

 lib/libpthread/pthread_tsd.c |  12 +++++++++---
 1 files changed, 9 insertions(+), 3 deletions(-)

diffs (40 lines):

diff -r 6a82fe0ae75e -r 8d8de3318b6a lib/libpthread/pthread_tsd.c
--- a/lib/libpthread/pthread_tsd.c      Sun Apr 19 20:41:30 2020 +0000
+++ b/lib/libpthread/pthread_tsd.c      Sun Apr 19 20:46:04 2020 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: pthread_tsd.c,v 1.20 2020/02/16 17:45:11 kamil Exp $   */
+/*     $NetBSD: pthread_tsd.c,v 1.21 2020/04/19 20:46:04 joerg Exp $   */
 
 /*-
  * Copyright (c) 2001, 2007 The NetBSD Foundation, Inc.
@@ -30,7 +30,7 @@
  */
 
 #include <sys/cdefs.h>
-__RCSID("$NetBSD: pthread_tsd.c,v 1.20 2020/02/16 17:45:11 kamil Exp $");
+__RCSID("$NetBSD: pthread_tsd.c,v 1.21 2020/04/19 20:46:04 joerg Exp $");
 
 /* Functions and structures dealing with thread-specific data */
 #include <errno.h>
@@ -73,6 +73,12 @@
        pthread_mutex_unlock(&tsd_mutex);
 }
 
+static void
+pthread_tsd_postfork_child(void)
+{
+       pthread_mutex_init(&tsd_mutex, NULL);
+}
+
 void *
 pthread_tsd_init(size_t *tlen)
 {
@@ -80,7 +86,7 @@
        size_t alen;
        char *arena;
 
-       pthread_atfork(pthread_tsd_prefork, pthread_tsd_postfork, pthread_tsd_postfork);
+       pthread_atfork(pthread_tsd_prefork, pthread_tsd_postfork, pthread_tsd_postfork_child);
 
        if ((pkm = pthread__getenv("PTHREAD_KEYS_MAX")) != NULL) {
                pthread_keys_max = (int)strtol(pkm, NULL, 0);