[src/trunk]: src/tests/lib/libpthread Add a test case for pthread_cond_timedw...

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

details:   https://anonhg.NetBSD.org/src/rev/38113cf80fb5
branches:  trunk
changeset: 763609:38113cf80fb5
user:      jruoho <jruoho%NetBSD.org@localhost>
date:      Sun Mar 27 16:45:15 2011 +0000

description:
Add a test case for pthread_cond_timedwait(3) failures reported by
Sad Clouds in PR lib/44756. This was discussed also in:

        http://mail-index.netbsd.org/tech-userlevel/2011/03/17/msg004689.html

diffstat:

 tests/lib/libpthread/t_cond.c |  65 +++++++++++++++++++++++++++++++++++++++++-
 1 files changed, 63 insertions(+), 2 deletions(-)

diffs (93 lines):

diff -r 18fc65fa13d1 -r 38113cf80fb5 tests/lib/libpthread/t_cond.c
--- a/tests/lib/libpthread/t_cond.c     Sun Mar 27 14:22:02 2011 +0000
+++ b/tests/lib/libpthread/t_cond.c     Sun Mar 27 16:45:15 2011 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: t_cond.c,v 1.2 2010/11/03 16:10:22 christos Exp $ */
+/* $NetBSD: t_cond.c,v 1.3 2011/03/27 16:45:15 jruoho Exp $ */
 
 /*
  * Copyright (c) 2008 The NetBSD Foundation, Inc.
@@ -29,7 +29,7 @@
 #include <sys/cdefs.h>
 __COPYRIGHT("@(#) Copyright (c) 2008\
  The NetBSD Foundation, inc. All rights reserved.");
-__RCSID("$NetBSD: t_cond.c,v 1.2 2010/11/03 16:10:22 christos Exp $");
+__RCSID("$NetBSD: t_cond.c,v 1.3 2011/03/27 16:45:15 jruoho Exp $");
 
 #include <sys/time.h>
 
@@ -306,6 +306,66 @@
 }
 
 static void *
+pthread_cond_timedwait_func(void *arg)
+{
+       struct timespec ts;
+       size_t i = 0;
+       int rv;
+
+       for (;;) {
+
+               if (i++ >= 10000)
+                       pthread_exit(NULL);
+
+               (void)memset(&ts, 0, sizeof(struct timespec));
+
+               ATF_REQUIRE(clock_gettime(CLOCK_REALTIME, &ts) == 0);
+
+               /*
+                * Set to one second in the past:
+                * pthread_cond_timedwait(3) should
+                * return ETIMEDOUT immediately.
+                */
+               ts.tv_sec = ts.tv_sec - 1;
+
+               PTHREAD_REQUIRE(pthread_mutex_lock(&static_mutex));
+               rv = pthread_cond_timedwait(&static_cond, &static_mutex, &ts);
+
+               /*
+                * Sometimes we catch ESRCH.
+                * This should never happen.
+                */
+               ATF_REQUIRE(rv == ETIMEDOUT);
+               PTHREAD_REQUIRE(pthread_mutex_unlock(&static_mutex));
+       }
+}
+
+ATF_TC(cond_timedwait_race);
+ATF_TC_HEAD(cond_timedwait_race, tc)
+{
+       atf_tc_set_md_var(tc, "descr", "Test pthread_cond_timedwait(3)");
+
+}
+ATF_TC_BODY(cond_timedwait_race, tc)
+{
+       pthread_t tid[64];
+       size_t i;
+
+       atf_tc_expect_fail("PR lib/44756");
+
+       for (i = 0; i < __arraycount(tid); i++) {
+
+               PTHREAD_REQUIRE(pthread_create(&tid[i], NULL,
+                       pthread_cond_timedwait_func, NULL));
+       }
+
+       for (i = 0; i < __arraycount(tid); i++) {
+
+               PTHREAD_REQUIRE(pthread_join(tid[i], NULL));
+       }
+}
+
+static void *
 broadcast_threadfunc(void *arg)
 {
        printf("2: Second thread.\n");
@@ -502,6 +562,7 @@
        ATF_TP_ADD_TC(tp, signal_before_unlock);
        ATF_TP_ADD_TC(tp, signal_before_unlock_static_init);
        ATF_TP_ADD_TC(tp, signal_wait_race);
+       ATF_TP_ADD_TC(tp, cond_timedwait_race);
        ATF_TP_ADD_TC(tp, broadcast);
        ATF_TP_ADD_TC(tp, bogus_timedwaits);
        ATF_TP_ADD_TC(tp, destroy_after_cancel);