htl: Add clock variants

* htl/pt-join.c (__pthread_join): Move implementation to...
(__pthread_join_common): ... new function. Add try, timed and clock support.
(__pthread_join): Reimplement on top of __pthread_join_common.
(__pthread_tryjoin_np, __pthread_timedjoin_np, __pthread_clockjoin_np):
Implement on top of __pthread_join_common.
(pthread_tryjoin_np, pthread_timedjoin_np, pthread_clockjoin_np): New
aliases.

* hurd/hurdlock.c (__lll_abstimed_wait, __lll_abstimed_xwait,
__lll_abstimed_lock): Check for supported clock.

* sysdeps/htl/pt-cond-timedwait.c (__pthread_cond_timedwait_internal):
Add clockid parameter and support it.
(__pthread_cond_timedwait): Pass -1 as clockid.
(__pthread_cond_clockwait): New function.
(pthread_cond_clockwait): New alias.
* sysdeps/htl/pt-cond-wait.c (__pthread_cond_timedwait_internal): Update
prototype.
(__pthread_cond_wait): Pass -1 as clockid.

* sysdeps/htl/pt-rwlock-timedrdlock.c
(__pthread_rwlock_timedrdlock_internal): Add clockid parameter, and
support id.
(__pthread_rwlock_clockrdlock): New function.
(pthread_rwlock_clockrdlock): New alias.
* sysdeps/htl/pt-rwlock-rdlock.c (__pthread_rwlock_timedrdlock_internal): Update
prototype.
(__pthread_rwlock_rdlock): Pass -1 as clockid.

* sysdeps/htl/pt-rwlock-timedwrlock.c
(__pthread_rwlock_timedwrlock_internal): Add clockid parameter, and
support id.
(__pthread_rwlock_clockwrlock): New function.
(pthread_rwlock_clockwrlock): New alias.
* sysdeps/htl/pt-rwlock-wrlock.c (__pthread_rwlock_timedwrlock_internal): Update
prototype.
(__pthread_rwlock_wrlock): Pass -1 as clockid.

* sysdeps/mach/hurd/htl/pt-mutex-timedlock.c (__pthread_mutex_timedlock): Move implementation to
(__pthread_mutex_clocklock): New function with additional clockid
parameter and support it.
(pthread_mutex_clocklock): New alias.
(__pthread_mutex_timedlock): Reimplement on top of __pthread_mutex_clocklock.

* sysdeps/htl/pthread.h (pthread_tryjoin_np, pthread_timedjoin_np,
pthread_clockjoin_np, pthread_mutex_clocklock, pthread_cond_clockwait,
pthread_rwlock_clockrdlock, pthread_rwlock_clockwrlock): New prototypes.
* sysdeps/htl/pthreadP.h (__pthread_cond_clockwait): New prototype.

* htl/Versions (GLIBC_2.32): Add pthread_cond_clockwait,
pthread_mutex_clocklock, pthread_rwlock_clockrdlock, pthread_rwlock_clockwrlock,
pthread_tryjoin_np, pthread_timedjoin_np, pthread_clockjoin_np.
* sysdeps/mach/hurd/i386/libpthread.abilist (pthread_clockjoin_np,
pthread_cond_clockwait, pthread_mutex_clocklock, pthread_rwlock_clockrdlock,
pthread_rwlock_clockwrlock, pthread_timedjoin_np, pthread_tryjoin_np):
New functions.

* nptl/tst-abstime.c, nptl/tst-join10.c, nptl/tst-join11.c, nptl/tst-join12.c,
nptl/tst-join13.c, nptl/tst-join14.c, nptl/tst-join2.c, nptl/tst-join3.c,
nptl/tst-join8.c, nptl/tst-join9.c, nptl/tst-mutex-errorcheck.c,
nptl/tst-pthread-mutexattr.c, nptl/tst-mutex11.c, nptl/tst-mutex5.c,
nptl/tst-mutex7.c, nptl/tst-mutex7robus.c, nptl/tst-mutex9.c,
nptl/tst-rwlock12.c, nptl/tst-rwlock14.c: Move to sysdeps/pthread.
* sysdeps/pthread/tst-mutex8.c: Move back to nptl.
* nptl/Makefile (tests): Move tst-mutex5, tst-mutex7, tst-mutex7robust,
tst-mutex9, tst-mutex11, tst-rwlock12, tst-rwlock14, tst-join2, tst-join3,
tst-join8, tst-join9 tst-join10, tst-join11, tst-join12, tst-join13, tst-join14,
tst-abstime, tst-mutex-errorcheck, tst-pthread-mutexattr to ...
* sysdeps/pthread/Makefile (tests): ... here.

31 files changed, 1569 insertions, 456 deletions

diff --git a/sysdeps/htl/pt-cond-timedwait.c b/sysdeps/htl/pt-cond-timedwait.c
index d27f7ba8d6..a0ced9a074 100644
--- a/sysdeps/htl/pt-cond-timedwait.c
+++ b/sysdeps/htl/pt-cond-timedwait.c
@@ -24,6 +24,7 @@
 
 extern int __pthread_cond_timedwait_internal (pthread_cond_t *cond,
 					      pthread_mutex_t *mutex,
+					      clockid_t clockid,
 					      const struct timespec *abstime);
 
 int
@@ -31,11 +32,22 @@ __pthread_cond_timedwait (pthread_cond_t *cond,
 			  pthread_mutex_t *mutex,
 			  const struct timespec *abstime)
 {
-  return __pthread_cond_timedwait_internal (cond, mutex, abstime);
+  return __pthread_cond_timedwait_internal (cond, mutex, -1, abstime);
 }
 
 weak_alias (__pthread_cond_timedwait, pthread_cond_timedwait);
 
+int
+__pthread_cond_clockwait (pthread_cond_t *cond,
+			  pthread_mutex_t *mutex,
+			  clockid_t clockid,
+			  const struct timespec *abstime)
+{
+  return __pthread_cond_timedwait_internal (cond, mutex, clockid, abstime);
+}
+
+weak_alias (__pthread_cond_clockwait, pthread_cond_clockwait);
+
 struct cancel_ctx
 {
   struct __pthread *wakeup;
@@ -69,11 +81,17 @@ cancel_hook (void *arg)
 int
 __pthread_cond_timedwait_internal (pthread_cond_t *cond,
 				   pthread_mutex_t *mutex,
+				   clockid_t clockid,
 				   const struct timespec *abstime)
 {
   error_t err;
   int cancelled, oldtype, drain;
-  clockid_t clock_id = __pthread_default_condattr.__clock;
+  clockid_t clock_id;
+
+  if (clockid != -1)
+    clock_id = clockid;
+  else
+    clock_id = __pthread_default_condattr.__clock;
 
   if (abstime && ! valid_nanoseconds (abstime->tv_nsec))
     return EINVAL;
@@ -114,7 +132,7 @@ __pthread_cond_timedwait_internal (pthread_cond_t *cond,
          already unblocked, progressing on the return path.  */
       __pthread_spin_wait (&cond->__lock);
       __pthread_enqueue (&cond->__queue, self);
-      if (cond->__attr != NULL)
+      if (cond->__attr != NULL && clockid == -1)
 	clock_id = cond->__attr->__clock;
       __pthread_spin_unlock (&cond->__lock);
     }
diff --git a/sysdeps/htl/pt-cond-wait.c b/sysdeps/htl/pt-cond-wait.c
index 2e87db0ca6..00a6922659 100644
--- a/sysdeps/htl/pt-cond-wait.c
+++ b/sysdeps/htl/pt-cond-wait.c
@@ -23,6 +23,7 @@
 /* Implemented in pt-cond-timedwait.c.  */
 extern int __pthread_cond_timedwait_internal (pthread_cond_t *cond,
 					      pthread_mutex_t *mutex,
+					      clockid_t clockid,
 					      const struct timespec *abstime);
 
 
@@ -32,7 +33,7 @@ extern int __pthread_cond_timedwait_internal (pthread_cond_t *cond,
 int
 __pthread_cond_wait (pthread_cond_t *cond, pthread_mutex_t *mutex)
 {
-  return __pthread_cond_timedwait_internal (cond, mutex, 0);
+  return __pthread_cond_timedwait_internal (cond, mutex, -1, 0);
 }
 
 weak_alias (__pthread_cond_wait, pthread_cond_wait);
diff --git a/sysdeps/htl/pt-rwlock-rdlock.c b/sysdeps/htl/pt-rwlock-rdlock.c
index 07aa119cbc..6588f01f80 100644
--- a/sysdeps/htl/pt-rwlock-rdlock.c
+++ b/sysdeps/htl/pt-rwlock-rdlock.c
@@ -22,6 +22,7 @@
 /* Implemented in pt-rwlock-timedrdlock.c.  */
 extern int __pthread_rwlock_timedrdlock_internal (struct __pthread_rwlock
 						  *rwlock,
+						  clockid_t clockid,
 						  const struct timespec
 						  *abstime);
 
@@ -29,6 +30,6 @@ extern int __pthread_rwlock_timedrdlock_internal (struct __pthread_rwlock
 int
 __pthread_rwlock_rdlock (struct __pthread_rwlock *rwlock)
 {
-  return __pthread_rwlock_timedrdlock_internal (rwlock, 0);
+  return __pthread_rwlock_timedrdlock_internal (rwlock, -1, 0);
 }
 weak_alias (__pthread_rwlock_rdlock, pthread_rwlock_rdlock);
diff --git a/sysdeps/htl/pt-rwlock-timedrdlock.c b/sysdeps/htl/pt-rwlock-timedrdlock.c
index c2827662fd..7019085489 100644
--- a/sysdeps/htl/pt-rwlock-timedrdlock.c
+++ b/sysdeps/htl/pt-rwlock-timedrdlock.c
@@ -27,6 +27,7 @@
    wait forever.  */
 int
 __pthread_rwlock_timedrdlock_internal (struct __pthread_rwlock *rwlock,
+				       clockid_t clockid,
 				       const struct timespec *abstime)
 {
   error_t err;
@@ -62,7 +63,10 @@ __pthread_rwlock_timedrdlock_internal (struct __pthread_rwlock *rwlock,
   assert (rwlock->__readers == 0);
 
   if (abstime != NULL && ! valid_nanoseconds (abstime->tv_nsec))
-    return EINVAL;
+    {
+      __pthread_spin_unlock (&rwlock->__lock);
+      return EINVAL;
+    }
 
   self = _pthread_self ();
 
@@ -72,7 +76,7 @@ __pthread_rwlock_timedrdlock_internal (struct __pthread_rwlock *rwlock,
 
   /* Block the thread.  */
   if (abstime != NULL)
-    err = __pthread_timedblock (self, abstime, CLOCK_REALTIME);
+    err = __pthread_timedblock (self, abstime, clockid);
   else
     {
       err = 0;
@@ -116,6 +120,15 @@ int
 __pthread_rwlock_timedrdlock (struct __pthread_rwlock *rwlock,
 			      const struct timespec *abstime)
 {
-  return __pthread_rwlock_timedrdlock_internal (rwlock, abstime);
+  return __pthread_rwlock_timedrdlock_internal (rwlock, CLOCK_REALTIME, abstime);
 }
 weak_alias (__pthread_rwlock_timedrdlock, pthread_rwlock_timedrdlock)
+
+int
+__pthread_rwlock_clockrdlock (struct __pthread_rwlock *rwlock,
+			      clockid_t clockid,
+			      const struct timespec *abstime)
+{
+  return __pthread_rwlock_timedrdlock_internal (rwlock, clockid, abstime);
+}
+weak_alias (__pthread_rwlock_clockrdlock, pthread_rwlock_clockrdlock)
diff --git a/sysdeps/htl/pt-rwlock-timedwrlock.c b/sysdeps/htl/pt-rwlock-timedwrlock.c
index d0293c1e96..e9f8da07db 100644
--- a/sysdeps/htl/pt-rwlock-timedwrlock.c
+++ b/sysdeps/htl/pt-rwlock-timedwrlock.c
@@ -27,6 +27,7 @@
    shall not time out.  */
 int
 __pthread_rwlock_timedwrlock_internal (struct __pthread_rwlock *rwlock,
+				       clockid_t clockid,
 				       const struct timespec *abstime)
 {
   error_t err;
@@ -48,7 +49,10 @@ __pthread_rwlock_timedwrlock_internal (struct __pthread_rwlock *rwlock,
   /* The lock is busy.  */
 
   if (abstime != NULL && ! valid_nanoseconds (abstime->tv_nsec))
-    return EINVAL;
+    {
+      __pthread_spin_unlock (&rwlock->__lock);
+      return EINVAL;
+    }
 
   self = _pthread_self ();
 
@@ -58,7 +62,7 @@ __pthread_rwlock_timedwrlock_internal (struct __pthread_rwlock *rwlock,
 
   /* Block the thread.  */
   if (abstime != NULL)
-    err = __pthread_timedblock (self, abstime, CLOCK_REALTIME);
+    err = __pthread_timedblock (self, abstime, clockid);
   else
     {
       err = 0;
@@ -99,6 +103,15 @@ int
 __pthread_rwlock_timedwrlock (struct __pthread_rwlock *rwlock,
 			      const struct timespec *abstime)
 {
-  return __pthread_rwlock_timedwrlock_internal (rwlock, abstime);
+  return __pthread_rwlock_timedwrlock_internal (rwlock, CLOCK_REALTIME, abstime);
 }
 weak_alias (__pthread_rwlock_timedwrlock, pthread_rwlock_timedwrlock)
+
+int
+__pthread_rwlock_clockwrlock (struct __pthread_rwlock *rwlock,
+			      clockid_t clockid,
+			      const struct timespec *abstime)
+{
+  return __pthread_rwlock_timedwrlock_internal (rwlock, clockid, abstime);
+}
+weak_alias (__pthread_rwlock_clockwrlock, pthread_rwlock_clockwrlock)
diff --git a/sysdeps/htl/pt-rwlock-wrlock.c b/sysdeps/htl/pt-rwlock-wrlock.c
index dcf09d98c7..c3e9c64051 100644
--- a/sysdeps/htl/pt-rwlock-wrlock.c
+++ b/sysdeps/htl/pt-rwlock-wrlock.c
@@ -24,6 +24,7 @@
 /* Implemented in pt-rwlock-timedwrlock.c.  */
 extern int __pthread_rwlock_timedwrlock_internal (struct __pthread_rwlock
 						  *rwlock,
+						  clockid_t clockid,
 						  const struct timespec
 						  *abstime);
 
@@ -31,6 +32,6 @@ extern int __pthread_rwlock_timedwrlock_internal (struct __pthread_rwlock
 int
 __pthread_rwlock_wrlock (struct __pthread_rwlock *rwlock)
 {
-  return __pthread_rwlock_timedwrlock_internal (rwlock, 0);
+  return __pthread_rwlock_timedwrlock_internal (rwlock, -1, 0);
 }
 weak_alias (__pthread_rwlock_wrlock, pthread_rwlock_wrlock);
diff --git a/sysdeps/htl/pthread.h b/sysdeps/htl/pthread.h
index d639385eb3..c44f70b158 100644
--- a/sysdeps/htl/pthread.h
+++ b/sysdeps/htl/pthread.h
@@ -222,6 +222,32 @@ extern void pthread_exit (void *__status) __attribute__ ((__noreturn__));
    the exit status of the thread in *STATUS.  */
 extern int pthread_join (pthread_t __threadp, void **__status);
 
+#ifdef __USE_GNU
+/* Check whether thread TH has terminated.  If yes return the status of
+   the thread in *THREAD_RETURN, if THREAD_RETURN is not NULL.  */
+extern int pthread_tryjoin_np (pthread_t __th, void **__thread_return) __THROW;
+
+/* Make calling thread wait for termination of the thread TH, but only
+   until TIMEOUT.  The exit status of the thread is stored in
+   *THREAD_RETURN, if THREAD_RETURN is not NULL.
+
+   This function is a cancellation point and therefore not marked with
+   __THROW.  */
+extern int pthread_timedjoin_np (pthread_t __th, void **__thread_return,
+				 const struct timespec *__abstime);
+
+/* Make calling thread wait for termination of the thread TH, but only
+   until TIMEOUT measured against the clock specified by CLOCKID.  The
+   exit status of the thread is stored in *THREAD_RETURN, if
+   THREAD_RETURN is not NULL.
+
+   This function is a cancellation point and therefore not marked with
+   __THROW.  */
+extern int pthread_clockjoin_np (pthread_t __th, void **__thread_return,
+                                 clockid_t __clockid,
+				 const struct timespec *__abstime);
+#endif
+
 /* Indicate that the storage for THREAD can be reclaimed when it
    terminates.  */
 extern int pthread_detach (pthread_t __threadp);
@@ -401,6 +427,13 @@ extern int pthread_mutex_timedlock (struct __pthread_mutex *__restrict __mutex,
 	__THROWNL __nonnull ((1, 2));
 #endif
 
+#ifdef __USE_GNU
+extern int pthread_mutex_clocklock (pthread_mutex_t *__restrict __mutex,
+				    clockid_t __clockid,
+				    const struct timespec *__restrict
+				    __abstime) __THROWNL __nonnull ((1, 3));
+#endif
+
 /* Unlock MUTEX.  */
 extern int pthread_mutex_unlock (pthread_mutex_t *__mutex)
 	__THROWNL __nonnull ((1));
@@ -517,6 +550,21 @@ extern int pthread_cond_timedwait (pthread_cond_t *__restrict __cond,
 				   pthread_mutex_t *__restrict __mutex,
 				   __const struct timespec *__restrict __abstime)
 	 __nonnull ((1, 2, 3));
+
+# ifdef __USE_GNU
+/* Wait for condition variable COND to be signaled or broadcast until
+   ABSTIME measured by the specified clock. MUTEX is assumed to be
+   locked before. CLOCK is the clock to use. ABSTIME is an absolute
+   time specification against CLOCK's epoch.
+
+   This function is a cancellation point and therefore not marked with
+   __THROW. */
+extern int pthread_cond_clockwait (pthread_cond_t *__restrict __cond,
+				   pthread_mutex_t *__restrict __mutex,
+				   __clockid_t __clock_id,
+				   const struct timespec *__restrict __abstime)
+     __nonnull ((1, 2, 4));
+# endif
 
 
 /* Spin locks.  */
@@ -623,6 +671,13 @@ extern int pthread_rwlock_timedrdlock (struct __pthread_rwlock *__restrict __rwl
 	__THROWNL __nonnull ((1, 2));
 # endif
 
+# ifdef __USE_GNU
+extern int pthread_rwlock_clockrdlock (pthread_rwlock_t *__restrict __rwlock,
+				       clockid_t __clockid,
+				       const struct timespec *__restrict
+				       __abstime) __THROWNL __nonnull ((1, 3));
+# endif
+
 /* Acquire the rwlock *RWLOCK for writing.  */
 extern int pthread_rwlock_wrlock (pthread_rwlock_t *__rwlock)
 	__THROWNL __nonnull ((1));
@@ -639,6 +694,13 @@ extern int pthread_rwlock_timedwrlock (struct __pthread_rwlock *__restrict __rwl
 	__THROWNL __nonnull ((1, 2));
 # endif
 
+# ifdef __USE_GNU
+extern int pthread_rwlock_clockwrlock (pthread_rwlock_t *__restrict __rwlock,
+				       clockid_t __clockid,
+				       const struct timespec *__restrict
+				       __abstime) __THROWNL __nonnull ((1, 3));
+# endif
+
 /* Release the lock held by the current thread on *RWLOCK.  */
 extern int pthread_rwlock_unlock (pthread_rwlock_t *__rwlock)
 	__THROWNL __nonnull ((1));
diff --git a/sysdeps/htl/pthreadP.h b/sysdeps/htl/pthreadP.h
index 1726ebb122..7486c9383e 100644
--- a/sysdeps/htl/pthreadP.h
+++ b/sysdeps/htl/pthreadP.h
@@ -50,6 +50,11 @@ extern int __pthread_cond_wait (pthread_cond_t *cond, pthread_mutex_t *mutex);
 extern int __pthread_cond_timedwait (pthread_cond_t *cond,
 				     pthread_mutex_t *mutex,
 				     const struct timespec *abstime);
+extern int __pthread_cond_clockwait (pthread_cond_t *cond,
+				     pthread_mutex_t *mutex,
+				     clockid_t clockid,
+				     const struct timespec *abstime)
+  __nonnull ((1, 2, 4));
 extern int __pthread_cond_destroy (pthread_cond_t *cond);
 
 typedef struct __cthread *__cthread_t;
diff --git a/sysdeps/mach/hurd/htl/pt-mutex-timedlock.c b/sysdeps/mach/hurd/htl/pt-mutex-timedlock.c
index b11bfc87c8..198b340429 100644
--- a/sysdeps/mach/hurd/htl/pt-mutex-timedlock.c
+++ b/sysdeps/mach/hurd/htl/pt-mutex-timedlock.c
@@ -24,7 +24,9 @@
 #include <hurdlock.h>
 
 int
-__pthread_mutex_timedlock (pthread_mutex_t *mtxp, const struct timespec *tsp)
+__pthread_mutex_clocklock (pthread_mutex_t *mtxp,
+			   clockid_t clockid,
+			   const struct timespec *tsp)
 {
   struct __pthread *self;
   int ret, flags = mtxp->__flags & GSYNC_SHARED;
@@ -32,7 +34,7 @@ __pthread_mutex_timedlock (pthread_mutex_t *mtxp, const struct timespec *tsp)
   switch (MTX_TYPE (mtxp))
     {
     case PT_MTX_NORMAL:
-      ret = lll_abstimed_lock (&mtxp->__lock, tsp, flags);
+      ret = lll_abstimed_lock (&mtxp->__lock, tsp, flags, clockid);
       break;
 
     case PT_MTX_RECURSIVE:
@@ -45,7 +47,7 @@ __pthread_mutex_timedlock (pthread_mutex_t *mtxp, const struct timespec *tsp)
 	  ++mtxp->__cnt;
 	  ret = 0;
 	}
-      else if ((ret = lll_abstimed_lock (&mtxp->__lock, tsp, flags)) == 0)
+      else if ((ret = lll_abstimed_lock (&mtxp->__lock, tsp, flags, clockid)) == 0)
 	{
 	  mtx_set_owner (mtxp, self, flags);
 	  mtxp->__cnt = 1;
@@ -57,7 +59,7 @@ __pthread_mutex_timedlock (pthread_mutex_t *mtxp, const struct timespec *tsp)
       self = _pthread_self ();
       if (mtx_owned_p (mtxp, self, flags))
 	ret = EDEADLK;
-      else if ((ret = lll_abstimed_lock (&mtxp->__lock, tsp, flags)) == 0)
+      else if ((ret = lll_abstimed_lock (&mtxp->__lock, tsp, flags, clockid)) == 0)
 	mtx_set_owner (mtxp, self, flags);
 
       break;
@@ -66,7 +68,7 @@ __pthread_mutex_timedlock (pthread_mutex_t *mtxp, const struct timespec *tsp)
     case PT_MTX_RECURSIVE | PTHREAD_MUTEX_ROBUST:
     case PT_MTX_ERRORCHECK | PTHREAD_MUTEX_ROBUST:
       self = _pthread_self ();
-      ROBUST_LOCK (self, mtxp, lll_robust_abstimed_lock, tsp, flags);
+      ROBUST_LOCK (self, mtxp, lll_robust_abstimed_lock, tsp, flags, clockid);
       break;
 
     default:
@@ -76,5 +78,13 @@ __pthread_mutex_timedlock (pthread_mutex_t *mtxp, const struct timespec *tsp)
 
   return ret;
 }
+weak_alias (__pthread_mutex_clocklock, pthread_mutex_clocklock)
+
+int
+__pthread_mutex_timedlock (pthread_mutex_t *mutex,
+			   const struct timespec *tsp)
+{
+  return __pthread_mutex_clocklock (mutex, CLOCK_REALTIME, tsp);
+}
 weak_alias (__pthread_mutex_timedlock, pthread_mutex_timedlock)
 hidden_def (__pthread_mutex_timedlock)
diff --git a/sysdeps/mach/hurd/i386/libpthread.abilist b/sysdeps/mach/hurd/i386/libpthread.abilist
index 6e75c90009..a1026f0d1e 100644
--- a/sysdeps/mach/hurd/i386/libpthread.abilist
+++ b/sysdeps/mach/hurd/i386/libpthread.abilist
@@ -155,12 +155,19 @@ GLIBC_2.32 mtx_lock F
 GLIBC_2.32 mtx_timedlock F
 GLIBC_2.32 mtx_trylock F
 GLIBC_2.32 mtx_unlock F
+GLIBC_2.32 pthread_clockjoin_np F
+GLIBC_2.32 pthread_cond_clockwait F
+GLIBC_2.32 pthread_mutex_clocklock F
 GLIBC_2.32 pthread_mutex_consistent F
 GLIBC_2.32 pthread_mutex_consistent_np F
 GLIBC_2.32 pthread_mutexattr_getrobust F
 GLIBC_2.32 pthread_mutexattr_getrobust_np F
 GLIBC_2.32 pthread_mutexattr_setrobust F
 GLIBC_2.32 pthread_mutexattr_setrobust_np F
+GLIBC_2.32 pthread_rwlock_clockrdlock F
+GLIBC_2.32 pthread_rwlock_clockwrlock F
+GLIBC_2.32 pthread_timedjoin_np F
+GLIBC_2.32 pthread_tryjoin_np F
 GLIBC_2.32 thrd_create F
 GLIBC_2.32 thrd_detach F
 GLIBC_2.32 thrd_exit F
diff --git a/sysdeps/pthread/Makefile b/sysdeps/pthread/Makefile
index 2f8aff35b2..b8dcadd2db 100644
--- a/sysdeps/pthread/Makefile
+++ b/sysdeps/pthread/Makefile
@@ -51,17 +51,23 @@ tests += tst-cnd-basic tst-mtx-trylock tst-cnd-broadcast \
 	 tst-cond14 tst-cond15 tst-cond16 tst-cond17 tst-cond18 tst-cond19 \
 	 tst-cond23 tst-cond24 tst-cond25 \
 	 tst-cond-except \
-	 tst-join1 tst-join4 tst-join5 tst-join6 tst-join7 \
+	 tst-join1 tst-join2 tst-join3 tst-join4 tst-join5 tst-join6 tst-join7 \
+	 tst-join8 tst-join9 tst-join10 tst-join11 tst-join12 tst-join13 \
+	 tst-join14 \
 	 tst-key1 tst-key2 tst-key3 tst-key4 \
-	 tst-mutex1 tst-mutex2 tst-mutex3 tst-mutex4 tst-mutex6 tst-mutex10 \
+	 tst-mutex-errorcheck tst-mutex1 tst-mutex2 tst-mutex3 tst-mutex4 \
+	 tst-mutex5 tst-mutex6 tst-mutex7 tst-mutex7robust tst-mutex9 \
+	 tst-mutex10 tst-mutex11 tst-pthread-mutexattr \
 	 tst-once1 tst-once2 tst-once3 tst-once4 \
 	 tst-robust1 tst-robust2 tst-robust3 tst-robust4 tst-robust5 \
 	 tst-robust6 tst-robust7 tst-robust9 tst-robust10 \
-	 tst-rwlock1 tst-rwlock4 tst-rwlock5 tst-rwlock13 tst-rwlock16 \
+	 tst-rwlock1 tst-rwlock4 tst-rwlock5 tst-rwlock12 \
+	 tst-rwlock13 tst-rwlock14 tst-rwlock16 \
 	 tst-rwlock-tryrdlock-stall tst-rwlock-trywrlock-stall \
 	 tst-sem1 tst-sem2 tst-sem3 tst-sem4 tst-sem6 tst-sem7 \
 	 tst-sem8 tst-sem9 tst-sem10 tst-sem14 tst-sem15 tst-sem16 \
-	 tst-spin1 tst-spin2 tst-spin3 tst-spin4
+	 tst-spin1 tst-spin2 tst-spin3 tst-spin4 \
+	 tst-abstime
 
 tests-internal += tst-robust8
 
diff --git a/sysdeps/pthread/tst-abstime.c b/sysdeps/pthread/tst-abstime.c
new file mode 100644
index 0000000000..90ed9194e3
--- /dev/null
+++ b/sysdeps/pthread/tst-abstime.c
@@ -0,0 +1,73 @@
+/* Copyright (C) 2010-2020 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Andreas Schwab <schwab@redhat.com>, 2010.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#include <errno.h>
+#include <pthread.h>
+#include <semaphore.h>
+#include <stdio.h>
+#include <support/check.h>
+#include <support/xthread.h>
+
+static pthread_cond_t c = PTHREAD_COND_INITIALIZER;
+static pthread_mutex_t m1 = PTHREAD_MUTEX_INITIALIZER;
+static pthread_mutex_t m2 = PTHREAD_MUTEX_INITIALIZER;
+static pthread_rwlock_t rw1 = PTHREAD_RWLOCK_INITIALIZER;
+static pthread_rwlock_t rw2 = PTHREAD_RWLOCK_INITIALIZER;
+static sem_t sem;
+
+static void *
+th (void *arg)
+{
+  struct timespec t = { -2, 0 };
+
+  TEST_COMPARE (pthread_mutex_timedlock (&m1, &t), ETIMEDOUT);
+  TEST_COMPARE (pthread_mutex_clocklock (&m1, CLOCK_REALTIME, &t), ETIMEDOUT);
+  TEST_COMPARE (pthread_mutex_clocklock (&m1, CLOCK_MONOTONIC, &t), ETIMEDOUT);
+  TEST_COMPARE (pthread_rwlock_timedrdlock (&rw1, &t), ETIMEDOUT);
+  TEST_COMPARE (pthread_rwlock_timedwrlock (&rw2, &t), ETIMEDOUT);
+  TEST_COMPARE (pthread_rwlock_clockrdlock (&rw1, CLOCK_REALTIME, &t),
+                ETIMEDOUT);
+  TEST_COMPARE (pthread_rwlock_clockwrlock (&rw2, CLOCK_REALTIME, &t),
+                ETIMEDOUT);
+  TEST_COMPARE (pthread_rwlock_clockrdlock (&rw1, CLOCK_MONOTONIC, &t),
+                ETIMEDOUT);
+  TEST_COMPARE (pthread_rwlock_clockwrlock (&rw2, CLOCK_MONOTONIC, &t),
+                ETIMEDOUT);
+  return NULL;
+}
+
+static int
+do_test (void)
+{
+  struct timespec t = { -2, 0 };
+
+  sem_init (&sem, 0, 0);
+  TEST_COMPARE (sem_timedwait (&sem, &t), -1);
+  TEST_COMPARE (errno, ETIMEDOUT);
+
+  xpthread_mutex_lock (&m1);
+  xpthread_rwlock_wrlock (&rw1);
+  xpthread_rwlock_rdlock (&rw2);
+  xpthread_mutex_lock (&m2);
+  pthread_t pth = xpthread_create (0, th, 0);
+  TEST_COMPARE (pthread_cond_timedwait (&c, &m2, &t), ETIMEDOUT);
+  xpthread_join (pth);
+  return 0;
+}
+
+#include <support/test-driver.c>
diff --git a/sysdeps/pthread/tst-join10.c b/sysdeps/pthread/tst-join10.c
new file mode 100644
index 0000000000..6e94c00f75
--- /dev/null
+++ b/sysdeps/pthread/tst-join10.c
@@ -0,0 +1,20 @@
+/* Check if pthread_clockjoin_np is a cancellation entrypoint.
+   Copyright (C) 2019-2020 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#define USE_PTHREAD_CLOCKJOIN_NP_REALTIME 1
+#include <sysdeps/pthread/tst-join5.c>
diff --git a/sysdeps/pthread/tst-join11.c b/sysdeps/pthread/tst-join11.c
new file mode 100644
index 0000000000..ed8312bc6b
--- /dev/null
+++ b/sysdeps/pthread/tst-join11.c
@@ -0,0 +1,21 @@
+/* Check if pthread_clockjoin_np is a cancellation entrypoint.
+   Copyright (C) 2019-2020 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#define USE_PTHREAD_CLOCKJOIN_NP_REALTIME 1
+#define WAIT_IN_CHILD 1
+#include <sysdeps/pthread/tst-join5.c>
diff --git a/sysdeps/pthread/tst-join12.c b/sysdeps/pthread/tst-join12.c
new file mode 100644
index 0000000000..57d713c82d
--- /dev/null
+++ b/sysdeps/pthread/tst-join12.c
@@ -0,0 +1,20 @@
+/* Check if pthread_clockjoin_np is a cancellation entrypoint.
+   Copyright (C) 2019-2020 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#define USE_PTHREAD_CLOCKJOIN_NP_MONOTONIC 1
+#include <sysdeps/pthread/tst-join5.c>
diff --git a/sysdeps/pthread/tst-join13.c b/sysdeps/pthread/tst-join13.c
new file mode 100644
index 0000000000..61a9106ebf
--- /dev/null
+++ b/sysdeps/pthread/tst-join13.c
@@ -0,0 +1,21 @@
+/* Check if pthread_clockjoin_np is a cancellation entrypoint.
+   Copyright (C) 2019-2020 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#define USE_PTHREAD_CLOCKJOIN_NP_MONOTONIC 1
+#define WAIT_IN_CHILD 1
+#include <sysdeps/pthread/tst-join5.c>
diff --git a/sysdeps/pthread/tst-join14.c b/sysdeps/pthread/tst-join14.c
new file mode 100644
index 0000000000..0109324453
--- /dev/null
+++ b/sysdeps/pthread/tst-join14.c
@@ -0,0 +1,74 @@
+/* pthread_timedjoin_np, pthread_clockjoin_np NULL timeout test.
+   Copyright (C) 2019-2020 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#include <errno.h>
+#include <pthread.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/time.h>
+#include <support/check.h>
+#include <support/timespec.h>
+#include <support/xthread.h>
+#include <support/xtime.h>
+
+
+#define CLOCK_USE_TIMEDJOIN (-1)
+
+
+static void *
+tf (void *arg)
+{
+  struct timespec ts = make_timespec(0, 100000);
+  nanosleep(&ts, NULL);
+
+  return (void *) 42l;
+}
+
+
+/* Check that pthread_timedjoin_np and pthread_clockjoin_np wait "forever" if
+ * passed a timeout parameter of NULL. We can't actually wait forever, but we
+ * can be sure that we did at least wait for some time by checking the exit
+ * status of the thread. */
+static int
+do_test_clock (clockid_t clockid)
+{
+  pthread_t th = xpthread_create (NULL, tf, NULL);
+
+  void *status;
+  int val = (clockid == CLOCK_USE_TIMEDJOIN)
+    ? pthread_timedjoin_np (th, &status, NULL)
+    : pthread_clockjoin_np (th, &status, clockid, NULL);
+  TEST_COMPARE (val, 0);
+
+  if (status != (void *) 42l)
+    FAIL_EXIT1 ("return value %p, expected %p\n", status, (void *) 42l);
+
+  return 0;
+}
+
+static int
+do_test (void)
+{
+  do_test_clock (CLOCK_USE_TIMEDJOIN);
+  do_test_clock (CLOCK_REALTIME);
+  do_test_clock (CLOCK_MONOTONIC);
+  return 0;
+}
+
+#include <support/test-driver.c>
diff --git a/sysdeps/pthread/tst-join2.c b/sysdeps/pthread/tst-join2.c
new file mode 100644
index 0000000000..22dfd11b82
--- /dev/null
+++ b/sysdeps/pthread/tst-join2.c
@@ -0,0 +1,103 @@
+/* Copyright (C) 2002-2020 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#include <errno.h>
+#include <pthread.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+
+
+static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
+
+
+static void *
+tf (void *arg)
+{
+  if (pthread_mutex_lock (&lock) != 0)
+    {
+      puts ("child: mutex_lock failed");
+      return NULL;
+    }
+
+  return (void *) 42l;
+}
+
+
+static int
+do_test (void)
+{
+  pthread_t th;
+
+  if (pthread_mutex_lock (&lock) != 0)
+    {
+      puts ("mutex_lock failed");
+      exit (1);
+    }
+
+  if (pthread_create (&th, NULL, tf, NULL) != 0)
+    {
+      puts ("mutex_create failed");
+      exit (1);
+    }
+
+  void *status;
+  int val = pthread_tryjoin_np (th, &status);
+  if (val == 0)
+    {
+      puts ("1st tryjoin succeeded");
+      exit (1);
+    }
+  else if (val != EBUSY)
+    {
+      puts ("1st tryjoin didn't return EBUSY");
+      exit (1);
+    }
+
+  if (pthread_mutex_unlock (&lock) != 0)
+    {
+      puts ("mutex_unlock failed");
+      exit (1);
+    }
+
+  while ((val = pthread_tryjoin_np (th, &status)) != 0)
+    {
+      if (val != EBUSY)
+	{
+	  printf ("tryjoin returned %s (%d), expected only 0 or EBUSY\n",
+		  strerror (val), val);
+	  exit (1);
+	}
+
+      /* Delay minimally.  */
+      struct timespec ts = { .tv_sec = 0, .tv_nsec = 10000000 };
+      nanosleep (&ts, NULL);
+    }
+
+  if (status != (void *) 42l)
+    {
+      printf ("return value %p, expected %p\n", status, (void *) 42l);
+      exit (1);
+    }
+
+  return 0;
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"
diff --git a/sysdeps/pthread/tst-join3.c b/sysdeps/pthread/tst-join3.c
new file mode 100644
index 0000000000..ffebcf586f
--- /dev/null
+++ b/sysdeps/pthread/tst-join3.c
@@ -0,0 +1,99 @@
+/* Copyright (C) 2002-2020 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#include <errno.h>
+#include <pthread.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/time.h>
+#include <support/check.h>
+#include <support/timespec.h>
+#include <support/xthread.h>
+#include <support/xtime.h>
+
+
+#define CLOCK_USE_TIMEDJOIN (-1)
+
+static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
+
+
+static void *
+tf (void *arg)
+{
+  xpthread_mutex_lock (&lock);
+  xpthread_mutex_unlock (&lock);
+
+  return (void *) 42l;
+}
+
+
+static int
+do_test_clock (clockid_t clockid)
+{
+  const clockid_t clockid_for_get =
+    (clockid == CLOCK_USE_TIMEDJOIN) ? CLOCK_REALTIME : clockid;
+
+  xpthread_mutex_lock (&lock);
+  pthread_t th = xpthread_create (NULL, tf, NULL);
+
+  void *status;
+  struct timespec timeout = timespec_add (xclock_now (clockid_for_get),
+                                          make_timespec (0, 200000000));
+
+  int val;
+  if (clockid == CLOCK_USE_TIMEDJOIN)
+    val = pthread_timedjoin_np (th, &status, &timeout);
+  else
+    val = pthread_clockjoin_np (th, &status, clockid, &timeout);
+
+  TEST_COMPARE (val, ETIMEDOUT);
+
+  xpthread_mutex_unlock (&lock);
+
+  while (1)
+    {
+      timeout = timespec_add (xclock_now (clockid_for_get),
+                              make_timespec (0, 200000000));
+
+      if (clockid == CLOCK_USE_TIMEDJOIN)
+        val = pthread_timedjoin_np (th, &status, &timeout);
+      else
+        val = pthread_clockjoin_np (th, &status, clockid, &timeout);
+      if (val == 0)
+	break;
+
+      TEST_COMPARE (val, ETIMEDOUT);
+    }
+
+  if (status != (void *) 42l)
+    FAIL_EXIT1 ("return value %p, expected %p\n", status, (void *) 42l);
+
+  return 0;
+}
+
+static int
+do_test (void)
+{
+  do_test_clock (CLOCK_USE_TIMEDJOIN);
+  do_test_clock (CLOCK_REALTIME);
+  do_test_clock (CLOCK_MONOTONIC);
+  return 0;
+}
+
+#include <support/test-driver.c>
diff --git a/sysdeps/pthread/tst-join8.c b/sysdeps/pthread/tst-join8.c
new file mode 100644
index 0000000000..3eddabab6f
--- /dev/null
+++ b/sysdeps/pthread/tst-join8.c
@@ -0,0 +1,20 @@
+/* Check if pthread_timedjoin_np is a cancellation entrypoint.
+   Copyright (C) 2019-2020 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#define USE_PTHREAD_TIMEDJOIN_NP 1
+#include <sysdeps/pthread/tst-join5.c>
diff --git a/sysdeps/pthread/tst-join9.c b/sysdeps/pthread/tst-join9.c
new file mode 100644
index 0000000000..e9d0f26146
--- /dev/null
+++ b/sysdeps/pthread/tst-join9.c
@@ -0,0 +1,21 @@
+/* Check if pthread_timedjoin_np is a cancellation entrypoint.
+   Copyright (C) 2019-2020 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#define USE_PTHREAD_TIMEDJOIN_NP 1
+#define WAIT_IN_CHILD 1
+#include <sysdeps/pthread/tst-join5.c>
diff --git a/sysdeps/pthread/tst-mutex-errorcheck.c b/sysdeps/pthread/tst-mutex-errorcheck.c
new file mode 100644
index 0000000000..cb140f94a0
--- /dev/null
+++ b/sysdeps/pthread/tst-mutex-errorcheck.c
@@ -0,0 +1,52 @@
+/* Check that error checking mutexes are not subject to lock elision.
+   Copyright (C) 2016-2020 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#include <stdio.h>
+#include <errno.h>
+#include <time.h>
+#include <pthread.h>
+#include <support/check.h>
+
+static int
+do_test (void)
+{
+  struct timespec tms = { 0 };
+  pthread_mutex_t mutex;
+  pthread_mutexattr_t mutexattr;
+  int ret = 0;
+
+  TEST_COMPARE (pthread_mutexattr_init (&mutexattr), 0);
+  TEST_COMPARE (pthread_mutexattr_settype (&mutexattr,
+                                           PTHREAD_MUTEX_ERRORCHECK), 0);
+
+  TEST_COMPARE (pthread_mutex_init (&mutex, &mutexattr), 0);
+  TEST_COMPARE (pthread_mutexattr_destroy (&mutexattr), 0);
+
+  /* The call to pthread_mutex_timedlock erroneously enabled lock elision
+     on the mutex, which then triggered an assertion failure in
+     pthread_mutex_unlock.  It would also defeat the error checking nature
+     of the mutex.  */
+  TEST_COMPARE (pthread_mutex_timedlock (&mutex, &tms), 0);
+  TEST_COMPARE (pthread_mutex_timedlock (&mutex, &tms), EDEADLK);
+
+  TEST_COMPARE (pthread_mutex_unlock (&mutex), 0);
+
+  return ret;
+}
+
+#include <support/test-driver.c>
diff --git a/sysdeps/pthread/tst-mutex11.c b/sysdeps/pthread/tst-mutex11.c
new file mode 100644
index 0000000000..2685f9e8bc
--- /dev/null
+++ b/sysdeps/pthread/tst-mutex11.c
@@ -0,0 +1,69 @@
+/* Test unsupported/bad clocks passed to pthread_mutex_clocklock.
+
+   Copyright (C) 2019-2020 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#include <errno.h>
+#include <pthread.h>
+#include <stdio.h>
+#include <time.h>
+#include <unistd.h>
+#include <support/check.h>
+
+static pthread_mutex_t mut = PTHREAD_MUTEX_INITIALIZER;
+
+static void test_bad_clockid (clockid_t clockid)
+{
+  const struct timespec ts = {0,0};
+  TEST_COMPARE (pthread_mutex_clocklock (&mut, clockid, &ts), EINVAL);
+}
+
+#define NOT_A_VALID_CLOCK 123456
+
+static int
+do_test (void)
+{
+  /* These clocks are meaningless to pthread_mutex_clocklock.  */
+#if defined(CLOCK_PROCESS_CPUTIME_ID)
+  test_bad_clockid (CLOCK_PROCESS_CPUTIME_ID);
+#endif
+#if defined(CLOCK_THREAD_CPUTIME_ID)
+  test_bad_clockid (CLOCK_PROCESS_CPUTIME_ID);
+#endif
+
+  /* These clocks might be meaningful, but are currently unsupported by
+     pthread_mutex_clocklock.  */
+#if defined(CLOCK_REALTIME_COARSE)
+  test_bad_clockid (CLOCK_REALTIME_COARSE);
+#endif
+#if defined(CLOCK_MONOTONIC_RAW)
+  test_bad_clockid (CLOCK_MONOTONIC_RAW);
+#endif
+#if defined(CLOCK_MONOTONIC_COARSE)
+  test_bad_clockid (CLOCK_MONOTONIC_COARSE);
+#endif
+#if defined(CLOCK_BOOTTIME)
+  test_bad_clockid (CLOCK_BOOTTIME);
+#endif
+
+  /* This is a completely invalid clock.  */
+  test_bad_clockid (NOT_A_VALID_CLOCK);
+
+  return 0;
+}
+
+#include <support/test-driver.c>
diff --git a/sysdeps/pthread/tst-mutex5.c b/sysdeps/pthread/tst-mutex5.c
new file mode 100644
index 0000000000..14490768c3
--- /dev/null
+++ b/sysdeps/pthread/tst-mutex5.c
@@ -0,0 +1,119 @@
+/* Copyright (C) 2002-2020 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#include <errno.h>
+#include <pthread.h>
+#include <stdio.h>
+#include <time.h>
+#include <unistd.h>
+#include <sys/time.h>
+#include <stdint.h>
+#include <config.h>
+#include <support/check.h>
+#include <support/timespec.h>
+
+
+#ifndef TYPE
+# define TYPE PTHREAD_MUTEX_NORMAL
+#endif
+
+/* A bogus clock value that tells run_test to use
+   pthread_mutex_timedlock rather than pthread_mutex_clocklock.  */
+#define CLOCK_USE_TIMEDLOCK (-1)
+
+static int
+do_test_clock (clockid_t clockid, const char *fnname)
+{
+  pthread_mutex_t m;
+  pthread_mutexattr_t a;
+  const clockid_t clockid_for_get =
+    (clockid == CLOCK_USE_TIMEDLOCK) ? CLOCK_REALTIME : clockid;
+
+  TEST_COMPARE (pthread_mutexattr_init (&a), 0);
+  TEST_COMPARE (pthread_mutexattr_settype (&a, TYPE), 0);
+
+#ifdef ENABLE_PI
+  TEST_COMPARE (pthread_mutexattr_setprotocol (&a, PTHREAD_PRIO_INHERIT), 0);
+#endif
+
+  int err = pthread_mutex_init (&m, &a);
+  if (err != 0)
+    {
+#ifdef ENABLE_PI
+      if (err == ENOTSUP)
+        FAIL_UNSUPPORTED ("PI mutexes unsupported");
+#endif
+      FAIL_EXIT1 ("mutex_init failed");
+    }
+
+  TEST_COMPARE (pthread_mutexattr_destroy (&a), 0);
+  TEST_COMPARE (pthread_mutex_lock (&m), 0);
+  if (pthread_mutex_trylock (&m) == 0)
+    FAIL_EXIT1 ("mutex_trylock succeeded");
+
+  /* Wait 2 seconds.  */
+  struct timespec ts_timeout = timespec_add (xclock_now (clockid_for_get),
+                                             make_timespec (2, 0));
+
+  if (clockid == CLOCK_USE_TIMEDLOCK)
+    TEST_COMPARE (pthread_mutex_timedlock (&m, &ts_timeout), ETIMEDOUT);
+  else
+    TEST_COMPARE (pthread_mutex_clocklock (&m, clockid, &ts_timeout),
+		  ETIMEDOUT);
+  TEST_TIMESPEC_BEFORE_NOW (ts_timeout, clockid_for_get);
+
+  /* The following makes the ts value invalid.  */
+  ts_timeout.tv_nsec += 1000000000;
+
+  if (clockid == CLOCK_USE_TIMEDLOCK)
+    TEST_COMPARE (pthread_mutex_timedlock (&m, &ts_timeout), EINVAL);
+  else
+    TEST_COMPARE (pthread_mutex_clocklock (&m, clockid, &ts_timeout), EINVAL);
+  TEST_COMPARE (pthread_mutex_unlock (&m), 0);
+
+  const struct timespec ts_start = xclock_now (CLOCK_REALTIME);
+
+  /* Wait 2 seconds.  */
+  ts_timeout = timespec_add (ts_start, make_timespec (2, 0));
+
+  if (clockid == CLOCK_USE_TIMEDLOCK)
+    TEST_COMPARE (pthread_mutex_timedlock (&m, &ts_timeout), 0);
+  else
+    TEST_COMPARE (pthread_mutex_clocklock (&m, clockid, &ts_timeout), 0);
+
+  const struct timespec ts_end = xclock_now (clockid_for_get);
+
+  /* Check that timedlock didn't delay.  We use a limit of 0.1 secs.  */
+  TEST_TIMESPEC_BEFORE (ts_end,
+                        timespec_add (ts_start, make_timespec (0, 100000000)));
+
+  TEST_COMPARE (pthread_mutex_unlock (&m), 0);
+  TEST_COMPARE (pthread_mutex_destroy (&m), 0);
+
+  return 0;
+}
+
+static int do_test (void)
+{
+  do_test_clock (CLOCK_USE_TIMEDLOCK, "timedlock");
+  do_test_clock (CLOCK_REALTIME, "clocklock(realtime)");
+  do_test_clock (CLOCK_MONOTONIC, "clocklock(monotonic)");
+  return 0;
+}
+
+#include <support/test-driver.c>
diff --git a/sysdeps/pthread/tst-mutex7.c b/sysdeps/pthread/tst-mutex7.c
new file mode 100644
index 0000000000..3938670b54
--- /dev/null
+++ b/sysdeps/pthread/tst-mutex7.c
@@ -0,0 +1,189 @@
+/* Copyright (C) 2002-2020 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#include <errno.h>
+#include <pthread.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+
+/* This test is a template for other tests to use.  Other tests define
+   the following macros to change the behaviour of the template test.
+   The test is very simple, it configures N threads given the parameters
+   below and then proceeds to go through mutex lock and unlock
+   operations in each thread as described before for the thread
+   function.  */
+#ifndef TYPE
+# define TYPE PTHREAD_MUTEX_DEFAULT
+#endif
+#ifndef ROBUST
+# define ROBUST PTHREAD_MUTEX_STALLED
+#endif
+#ifndef DELAY_NSEC
+# define DELAY_NSEC 11000
+#endif
+#ifndef ROUNDS
+# define ROUNDS 1000
+#endif
+#ifndef N
+# define N 100
+#endif
+
+static pthread_mutex_t lock;
+
+/* Each thread locks and the subsequently unlocks the lock, yielding
+   the smallest critical section possible.  After the unlock the thread
+   waits DELAY_NSEC nanoseconds before doing the lock and unlock again.
+   Every thread does this ROUNDS times.  The lock and unlock are
+   checked for errors.  */
+static void *
+tf (void *arg)
+{
+  int nr = (long int) arg;
+  int cnt;
+  struct timespec ts = { .tv_sec = 0, .tv_nsec = DELAY_NSEC };
+
+  for (cnt = 0; cnt < ROUNDS; ++cnt)
+    {
+      if (pthread_mutex_lock (&lock) != 0)
+	{
+	  printf ("thread %d: failed to get the lock\n", nr);
+	  return (void *) 1l;
+	}
+
+      if (pthread_mutex_unlock (&lock) != 0)
+	{
+	  printf ("thread %d: failed to release the lock\n", nr);
+	  return (void *) 1l;
+	}
+
+      if ((ts.tv_sec > 0) || (ts.tv_nsec > 0))
+	nanosleep (&ts, NULL);
+    }
+
+  return NULL;
+}
+
+/* Setup and run N threads, where each thread does as described
+   in the above thread function.  The threads are given a minimal 1MiB
+   stack since they don't do anything between the lock and unlock.  */
+static int
+do_test (void)
+{
+  pthread_mutexattr_t a;
+
+  if (pthread_mutexattr_init (&a) != 0)
+    {
+      puts ("mutexattr_init failed");
+      exit (1);
+    }
+
+  if (pthread_mutexattr_settype (&a, TYPE) != 0)
+    {
+      puts ("mutexattr_settype failed");
+      exit (1);
+    }
+
+  if (pthread_mutexattr_setrobust (&a, ROBUST) != 0)
+    {
+      puts ("mutexattr_setrobust failed");
+      exit (1);
+    }
+
+#ifdef ENABLE_PI
+  if (pthread_mutexattr_setprotocol (&a, PTHREAD_PRIO_INHERIT) != 0)
+    {
+      puts ("pthread_mutexattr_setprotocol failed");
+      return 1;
+    }
+#endif
+
+  int e = pthread_mutex_init (&lock, &a);
+  if (e != 0)
+    {
+#ifdef ENABLE_PI
+      if (e == ENOTSUP)
+	{
+	  puts ("PI mutexes unsupported");
+	  return 0;
+	}
+#endif
+      puts ("mutex_init failed");
+      return 1;
+    }
+
+  if (pthread_mutexattr_destroy (&a) != 0)
+    {
+      puts ("mutexattr_destroy failed");
+      return 1;
+    }
+
+  pthread_attr_t at;
+  pthread_t th[N];
+  int cnt;
+
+  if (pthread_attr_init (&at) != 0)
+    {
+      puts ("attr_init failed");
+      return 1;
+    }
+
+  if (pthread_attr_setstacksize (&at, 1 * 1024 * 1024) != 0)
+    {
+      puts ("attr_setstacksize failed");
+      return 1;
+    }
+
+  if (pthread_mutex_lock (&lock) != 0)
+    {
+      puts ("locking in parent failed");
+      return 1;
+    }
+
+  for (cnt = 0; cnt < N; ++cnt)
+    if (pthread_create (&th[cnt], &at, tf, (void *) (long int) cnt) != 0)
+      {
+	printf ("creating thread %d failed\n", cnt);
+	return 1;
+      }
+
+  if (pthread_attr_destroy (&at) != 0)
+    {
+      puts ("attr_destroy failed");
+      return 1;
+    }
+
+  if (pthread_mutex_unlock (&lock) != 0)
+    {
+      puts ("unlocking in parent failed");
+      return 1;
+    }
+
+  for (cnt = 0; cnt < N; ++cnt)
+    if (pthread_join (th[cnt], NULL) != 0)
+      {
+	printf ("joining thread %d failed\n", cnt);
+	return 1;
+      }
+
+  return 0;
+}
+
+#define TIMEOUT 60
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"
diff --git a/sysdeps/pthread/tst-mutex7robust.c b/sysdeps/pthread/tst-mutex7robust.c
new file mode 100644
index 0000000000..8221a61d29
--- /dev/null
+++ b/sysdeps/pthread/tst-mutex7robust.c
@@ -0,0 +1,7 @@
+/* Bug 21778: Fix oversight in robust mutex lock acquisition.  */
+#define TYPE PTHREAD_MUTEX_NORMAL
+#define ROBUST PTHREAD_MUTEX_ROBUST
+#define DELAY_NSEC 0
+#define ROUNDS 1000
+#define N 32
+#include "tst-mutex7.c"
diff --git a/sysdeps/pthread/tst-mutex8.c b/sysdeps/pthread/tst-mutex8.c
deleted file mode 100644
index 8e56ea5a3a..0000000000
--- a/sysdeps/pthread/tst-mutex8.c
+++ /dev/null
@@ -1,435 +0,0 @@
-/* Copyright (C) 2003-2020 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-   Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
-
-   The GNU C Library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Lesser General Public
-   License as published by the Free Software Foundation; either
-   version 2.1 of the License, or (at your option) any later version.
-
-   The GNU C Library is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public
-   License along with the GNU C Library; if not, see
-   <https://www.gnu.org/licenses/>.  */
-
-/* This test checks behavior not required by POSIX.  */
-#include <errno.h>
-#include <pthread.h>
-#include <stdbool.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <elf/dl-tunables.h>
-
-static pthread_mutex_t *m;
-static pthread_barrier_t b;
-static pthread_cond_t c;
-static bool done;
-
-
-static void
-cl (void *arg)
-{
-  if (pthread_mutex_unlock (m) != 0)
-    {
-      puts ("cl: mutex_unlocked failed");
-      exit (1);
-    }
-}
-
-
-static void *
-tf (void *arg)
-{
-  if (pthread_mutex_lock (m) != 0)
-    {
-      puts ("tf: mutex_lock failed");
-      return (void *) 1l;
-    }
-
-  int e = pthread_barrier_wait (&b);
-  if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)
-    {
-      puts ("barrier_wait failed");
-      return (void *) 1l;
-    }
-
-  if (arg == NULL)
-    do
-      if (pthread_cond_wait (&c, m) != 0)
-	{
-	  puts ("tf: cond_wait failed");
-	  return (void *) 1l;
-	}
-    while (! done);
-  else
-    do
-      {
-	pthread_cleanup_push (cl, NULL);
-
-	if (pthread_cond_wait (&c, m) != 0)
-	  {
-	    puts ("tf: cond_wait failed");
-	    return (void *) 1l;
-	  }
-
-	pthread_cleanup_pop (0);
-      }
-    while (! done);
-
-  if (pthread_mutex_unlock (m) != 0)
-    {
-      puts ("tf: mutex_unlock failed");
-      return (void *) 1l;
-    }
-
-  return NULL;
-}
-
-
-static int
-check_type (const char *mas, pthread_mutexattr_t *ma)
-{
-  int e;
-
-  /* Check if a mutex will be elided.  Lock elision can only be activated via
-     the tunables framework.  By default, lock elision is disabled.  */
-  bool assume_elided_mutex = false;
-#if HAVE_TUNABLES
-  int ma_type = PTHREAD_MUTEX_TIMED_NP;
-  if (ma != NULL)
-    {
-      e = pthread_mutexattr_gettype (ma, &ma_type);
-      if (e != 0)
-	{
-	  printf ("pthread_mutexattr_gettype failed with %d (%m)\n", e);
-	  return 1;
-	}
-    }
-  if (ma_type == PTHREAD_MUTEX_TIMED_NP)
-    {
-      /* This type of mutex can be elided if elision is enabled via the tunables
-	 framework.  Some tests below are failing if the mutex is elided.
-	 Thus we only run those if we assume that the mutex won't be elided.  */
-      if (TUNABLE_GET_FULL (glibc, elision, enable, int32_t, NULL) == 1)
-	assume_elided_mutex = true;
-    }
-#endif
-
-  e = pthread_mutex_init (m, ma);
-  if (e != 0)
-    {
-#ifdef ENABLE_PI
-      if (e == ENOTSUP)
-	{
-	  puts ("PI mutexes unsupported");
-	  return 0;
-	}
-#endif
-      printf ("1st mutex_init failed for %s\n", mas);
-      return 1;
-    }
-
-  if (pthread_mutex_destroy (m) != 0)
-    {
-      printf ("immediate mutex_destroy failed for %s\n", mas);
-      return 1;
-    }
-
-  if (pthread_mutex_init (m, ma) != 0)
-    {
-      printf ("2nd mutex_init failed for %s\n", mas);
-      return 1;
-    }
-
-  if (pthread_mutex_lock (m) != 0)
-    {
-      printf ("1st mutex_lock failed for %s\n", mas);
-      return 1;
-    }
-
-  /* Elided mutexes don't fail destroy, thus only test this if we don't assume
-     elision.  */
-  if (assume_elided_mutex == false)
-    {
-      e = pthread_mutex_destroy (m);
-      if (e == 0)
-	{
-	  printf ("mutex_destroy of self-locked mutex succeeded for %s\n", mas);
-	  return 1;
-	}
-      if (e != EBUSY)
-	{
-	  printf ("\
-mutex_destroy of self-locked mutex did not return EBUSY %s\n",
-		  mas);
-	  return 1;
-	}
-    }
-
-  if (pthread_mutex_unlock (m) != 0)
-    {
-      printf ("1st mutex_unlock failed for %s\n", mas);
-      return 1;
-    }
-
-  if (pthread_mutex_trylock (m) != 0)
-    {
-      printf ("mutex_trylock failed for %s\n", mas);
-      return 1;
-    }
-
-  /* Elided mutexes don't fail destroy.  */
-  if (assume_elided_mutex == false)
-    {
-      e = pthread_mutex_destroy (m);
-      if (e == 0)
-	{
-	  printf ("mutex_destroy of self-trylocked mutex succeeded for %s\n",
-		  mas);
-	  return 1;
-	}
-      if (e != EBUSY)
-	{
-	  printf ("\
-mutex_destroy of self-trylocked mutex did not return EBUSY %s\n",
-		  mas);
-	  return 1;
-	}
-    }
-
-  if (pthread_mutex_unlock (m) != 0)
-    {
-      printf ("2nd mutex_unlock failed for %s\n", mas);
-      return 1;
-    }
-
-  pthread_t th;
-  if (pthread_create (&th, NULL, tf, NULL) != 0)
-    {
-      puts ("1st create failed");
-      return 1;
-    }
-  done = false;
-
-  e = pthread_barrier_wait (&b);
-  if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)
-    {
-      puts ("1st barrier_wait failed");
-      return 1;
-    }
-
-  if (pthread_mutex_lock (m) != 0)
-    {
-      printf ("2nd mutex_lock failed for %s\n", mas);
-      return 1;
-    }
-
-  if (pthread_mutex_unlock (m) != 0)
-    {
-      printf ("3rd mutex_unlock failed for %s\n", mas);
-      return 1;
-    }
-
-  /* Elided mutexes don't fail destroy.  */
-  if (assume_elided_mutex == false)
-    {
-      e = pthread_mutex_destroy (m);
-      if (e == 0)
-	{
-	  printf ("mutex_destroy of condvar-used mutex succeeded for %s\n",
-		  mas);
-	  return 1;
-	}
-      if (e != EBUSY)
-	{
-	  printf ("\
-mutex_destroy of condvar-used mutex did not return EBUSY for %s\n", mas);
-	  return 1;
-	}
-    }
-
-  done = true;
-  if (pthread_cond_signal (&c) != 0)
-    {
-      puts ("cond_signal failed");
-      return 1;
-    }
-
-  void *r;
-  if (pthread_join (th, &r) != 0)
-    {
-      puts ("join failed");
-      return 1;
-    }
-  if (r != NULL)
-    {
-      puts ("thread didn't return NULL");
-      return 1;
-    }
-
-  if (pthread_mutex_destroy (m) != 0)
-    {
-      printf ("mutex_destroy after condvar-use failed for %s\n", mas);
-      return 1;
-    }
-
-  if (pthread_mutex_init (m, ma) != 0)
-    {
-      printf ("3rd mutex_init failed for %s\n", mas);
-      return 1;
-    }
-
-  if (pthread_create (&th, NULL, tf, (void *) 1) != 0)
-    {
-      puts ("2nd create failed");
-      return 1;
-    }
-  done = false;
-
-  e = pthread_barrier_wait (&b);
-  if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)
-    {
-      puts ("2nd barrier_wait failed");
-      return 1;
-    }
-
-  if (pthread_mutex_lock (m) != 0)
-    {
-      printf ("3rd mutex_lock failed for %s\n", mas);
-      return 1;
-    }
-
-  if (pthread_mutex_unlock (m) != 0)
-    {
-      printf ("4th mutex_unlock failed for %s\n", mas);
-      return 1;
-    }
-
-  /* Elided mutexes don't fail destroy.  */
-  if (assume_elided_mutex == false)
-    {
-      e = pthread_mutex_destroy (m);
-      if (e == 0)
-	{
-	  printf ("2nd mutex_destroy of condvar-used mutex succeeded for %s\n",
-		  mas);
-	  return 1;
-	}
-      if (e != EBUSY)
-	{
-	  printf ("\
-2nd mutex_destroy of condvar-used mutex did not return EBUSY for %s\n",
-		  mas);
-	  return 1;
-	}
-    }
-
-  if (pthread_cancel (th) != 0)
-    {
-      puts ("cond_cancel failed");
-      return 1;
-    }
-
-  if (pthread_join (th, &r) != 0)
-    {
-      puts ("join failed");
-      return 1;
-    }
-  if (r != PTHREAD_CANCELED)
-    {
-      puts ("thread not canceled");
-      return 1;
-    }
-
-  if (pthread_mutex_destroy (m) != 0)
-    {
-      printf ("mutex_destroy after condvar-canceled failed for %s\n", mas);
-      return 1;
-    }
-
-  return 0;
-}
-
-
-static int
-do_test (void)
-{
-  pthread_mutex_t mm;
-  m = &mm;
-
-  if (pthread_barrier_init (&b, NULL, 2) != 0)
-    {
-      puts ("barrier_init failed");
-      return 1;
-    }
-
-  if (pthread_cond_init (&c, NULL) != 0)
-    {
-      puts ("cond_init failed");
-      return 1;
-    }
-
-  puts ("check normal mutex");
-  int res = check_type ("normal", NULL);
-
-  pthread_mutexattr_t ma;
-  if (pthread_mutexattr_init (&ma) != 0)
-    {
-      puts ("1st mutexattr_init failed");
-      return 1;
-    }
-  if (pthread_mutexattr_settype (&ma, PTHREAD_MUTEX_RECURSIVE) != 0)
-    {
-      puts ("1st mutexattr_settype failed");
-      return 1;
-    }
-#ifdef ENABLE_PI
-  if (pthread_mutexattr_setprotocol (&ma, PTHREAD_PRIO_INHERIT))
-    {
-      puts ("1st pthread_mutexattr_setprotocol failed");
-      return 1;
-    }
-#endif
-  puts ("check recursive mutex");
-  res |= check_type ("recursive", &ma);
-  if (pthread_mutexattr_destroy (&ma) != 0)
-    {
-      puts ("1st mutexattr_destroy failed");
-      return 1;
-    }
-
-  if (pthread_mutexattr_init (&ma) != 0)
-    {
-      puts ("2nd mutexattr_init failed");
-      return 1;
-    }
-  if (pthread_mutexattr_settype (&ma, PTHREAD_MUTEX_ERRORCHECK) != 0)
-    {
-      puts ("2nd mutexattr_settype failed");
-      return 1;
-    }
-#ifdef ENABLE_PI
-  if (pthread_mutexattr_setprotocol (&ma, PTHREAD_PRIO_INHERIT))
-    {
-      puts ("2nd pthread_mutexattr_setprotocol failed");
-      return 1;
-    }
-#endif
-  puts ("check error-checking mutex");
-  res |= check_type ("error-checking", &ma);
-  if (pthread_mutexattr_destroy (&ma) != 0)
-    {
-      puts ("2nd mutexattr_destroy failed");
-      return 1;
-    }
-
-  return res;
-}
-
-#define TEST_FUNCTION do_test ()
-#include "../test-skeleton.c"
diff --git a/sysdeps/pthread/tst-mutex9.c b/sysdeps/pthread/tst-mutex9.c
new file mode 100644
index 0000000000..2d7927b7c2
--- /dev/null
+++ b/sysdeps/pthread/tst-mutex9.c
@@ -0,0 +1,140 @@
+/* Copyright (C) 2003-2020 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#include <errno.h>
+#include <pthread.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/mman.h>
+#include <sys/time.h>
+#include <sys/wait.h>
+#include <support/check.h>
+#include <support/timespec.h>
+#include <support/xunistd.h>
+
+
+/* A bogus clock value that tells run_test to use pthread_mutex_timedlock
+   rather than pthread_mutex_clocklock.  */
+#define CLOCK_USE_TIMEDLOCK (-1)
+
+static void
+do_test_clock (clockid_t clockid)
+{
+  const clockid_t clockid_for_get =
+    (clockid == CLOCK_USE_TIMEDLOCK) ? CLOCK_REALTIME : clockid;
+  size_t ps = sysconf (_SC_PAGESIZE);
+  char tmpfname[] = "/tmp/tst-mutex9.XXXXXX";
+  char data[ps];
+  void *mem;
+  int fd;
+  pthread_mutex_t *m;
+  pthread_mutexattr_t a;
+  pid_t pid;
+
+  fd = mkstemp (tmpfname);
+  if (fd == -1)
+      FAIL_EXIT1 ("cannot open temporary file: %m\n");
+
+  /* Make sure it is always removed.  */
+  unlink (tmpfname);
+
+  /* Create one page of data.  */
+  memset (data, '\0', ps);
+
+  /* Write the data to the file.  */
+  xwrite (fd, data, ps);
+
+  mem = xmmap (NULL, ps, PROT_READ | PROT_WRITE, MAP_SHARED, fd);
+
+  m = (pthread_mutex_t *) (((uintptr_t) mem + __alignof (pthread_mutex_t))
+			   & ~(__alignof (pthread_mutex_t) - 1));
+
+  TEST_COMPARE (pthread_mutexattr_init (&a), 0);
+
+  TEST_COMPARE (pthread_mutexattr_setpshared (&a, PTHREAD_PROCESS_SHARED), 0);
+
+  TEST_COMPARE (pthread_mutexattr_settype (&a, PTHREAD_MUTEX_RECURSIVE), 0);
+
+#ifdef ENABLE_PI
+  TEST_COMPARE (pthread_mutexattr_setprotocol (&a, PTHREAD_PRIO_INHERIT), 0);
+#endif
+
+  int e;
+  if ((e = pthread_mutex_init (m, &a)) != 0)
+    {
+#ifdef ENABLE_PI
+      if (e == ENOTSUP)
+        FAIL_UNSUPPORTED ("PI mutexes unsupported");
+#endif
+      FAIL_EXIT1 ("mutex_init failed");
+    }
+
+  TEST_COMPARE (pthread_mutex_lock (m), 0);
+
+  TEST_COMPARE (pthread_mutexattr_destroy (&a), 0);
+
+  puts ("going to fork now");
+  pid = xfork ();
+  if (pid == 0)
+    {
+      if (pthread_mutex_trylock (m) == 0)
+        FAIL_EXIT1 ("child: mutex_trylock succeeded");
+
+      if (pthread_mutex_unlock (m) == 0)
+        FAIL_EXIT1 ("child: mutex_unlock succeeded");
+
+      const struct timespec ts = timespec_add (xclock_now (clockid_for_get),
+                                               make_timespec (0, 500000000));
+
+      if (clockid == CLOCK_USE_TIMEDLOCK)
+        TEST_COMPARE (pthread_mutex_timedlock (m, &ts), ETIMEDOUT);
+      else
+        TEST_COMPARE (pthread_mutex_clocklock (m, clockid, &ts), ETIMEDOUT);
+
+      alarm (1);
+
+      pthread_mutex_lock (m);
+
+      puts ("child: mutex_lock returned");
+
+      exit (0);
+    }
+
+  sleep (2);
+
+  int status;
+  if (TEMP_FAILURE_RETRY (waitpid (pid, &status, 0)) != pid)
+    FAIL_EXIT1 ("waitpid failed");
+  if (! WIFSIGNALED (status))
+    FAIL_EXIT1 ("child not killed by signal");
+  TEST_COMPARE (WTERMSIG (status), SIGALRM);
+}
+
+static int
+do_test (void)
+{
+  do_test_clock (CLOCK_USE_TIMEDLOCK);
+  do_test_clock (CLOCK_REALTIME);
+  do_test_clock (CLOCK_MONOTONIC);
+  return 0;
+}
+
+#include <support/test-driver.c>
diff --git a/sysdeps/pthread/tst-pthread-mutexattr.c b/sysdeps/pthread/tst-pthread-mutexattr.c
new file mode 100644
index 0000000000..d0615bfcf8
--- /dev/null
+++ b/sysdeps/pthread/tst-pthread-mutexattr.c
@@ -0,0 +1,60 @@
+/* Make sure that pthread_mutexattr_gettype returns a valid kind.
+
+   Copyright (C) 2015-2020 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#include <stdio.h>
+#include <string.h>
+#include <pthread.h>
+
+static int
+do_test (void)
+{
+  pthread_mutexattr_t attr;
+  int kind;
+  int error;
+
+  error = pthread_mutexattr_init (&attr);
+  if (error)
+    {
+      printf ("pthread_mutexattr_init: %s\n", strerror (error));
+      return 1;
+    }
+  error = pthread_mutexattr_settype (&attr, PTHREAD_MUTEX_DEFAULT);
+  if (error)
+    {
+      printf ("pthread_mutexattr_settype (1): %s\n", strerror (error));
+      return 1;
+    }
+  error = pthread_mutexattr_gettype (&attr, &kind);
+  if (error)
+    {
+      printf ("pthread_mutexattr_gettype: %s\n", strerror (error));
+      return 1;
+    }
+  error = pthread_mutexattr_settype (&attr, kind);
+  if (error)
+    {
+      printf ("pthread_mutexattr_settype (2): %s\n", strerror (error));
+      return 1;
+    }
+  return 0;
+}
+
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"
diff --git a/sysdeps/pthread/tst-rwlock12.c b/sysdeps/pthread/tst-rwlock12.c
new file mode 100644
index 0000000000..73937fe5d6
--- /dev/null
+++ b/sysdeps/pthread/tst-rwlock12.c
@@ -0,0 +1,207 @@
+/* Copyright (C) 2002-2020 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#include <errno.h>
+#include <pthread.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/mman.h>
+#include <sys/wait.h>
+
+
+static int
+do_test (void)
+{
+  size_t ps = sysconf (_SC_PAGESIZE);
+  char tmpfname[] = "/tmp/tst-rwlock12.XXXXXX";
+  char data[ps];
+  void *mem;
+  int fd;
+  pthread_mutex_t *m;
+  pthread_mutexattr_t ma;
+  pthread_rwlock_t *r;
+  pthread_rwlockattr_t ra;
+  pid_t pid;
+  int status = 0;
+
+  fd = mkstemp (tmpfname);
+  if (fd == -1)
+    {
+      printf ("cannot open temporary file: %m\n");
+      return 1;
+    }
+
+  /* Make sure it is always removed.  */
+  unlink (tmpfname);
+
+  /* Create one page of data.  */
+  memset (data, '\0', ps);
+
+  /* Write the data to the file.  */
+  if (write (fd, data, ps) != (ssize_t) ps)
+    {
+      puts ("short write");
+      return 1;
+    }
+
+  mem = mmap (NULL, ps, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
+  if (mem == MAP_FAILED)
+    {
+      printf ("mmap failed: %m\n");
+      return 1;
+    }
+
+  r = (pthread_rwlock_t *) (((uintptr_t) mem + __alignof (pthread_rwlock_t))
+			    & ~(__alignof (pthread_rwlock_t) - 1));
+  /* The following assumes alignment for a mutex is at least as high
+     as that for a rwlock.  Which is true in our case.  */
+  m = (pthread_mutex_t *) (r + 1);
+
+  if (pthread_rwlockattr_init (&ra) != 0)
+    {
+      puts ("rwlockattr_init failed");
+      return 1;
+    }
+
+  if (pthread_rwlockattr_setpshared (&ra, PTHREAD_PROCESS_SHARED) != 0)
+    {
+      puts ("rwlockattr_setpshared failed");
+      return 1;
+    }
+
+  if (pthread_rwlock_init (r, &ra) != 0)
+    {
+      puts ("rwlock_init failed");
+      return 1;
+    }
+
+  if (pthread_mutexattr_init (&ma) != 0)
+    {
+      puts ("rwlockattr_init failed");
+      return 1;
+    }
+
+  if (pthread_mutexattr_setpshared (&ma, PTHREAD_PROCESS_SHARED) != 0)
+    {
+      puts ("mutexattr_setpshared failed");
+      return 1;
+    }
+
+  if (pthread_mutex_init (m, &ma) != 0)
+    {
+      puts ("mutex_init failed");
+      return 1;
+    }
+
+  /* Lock the mutex.  */
+  if (pthread_mutex_lock (m) != 0)
+    {
+      puts ("mutex_lock failed");
+      return 1;
+    }
+
+  puts ("going to fork now");
+  pid = fork ();
+  if (pid == -1)
+    {
+      puts ("fork failed");
+      return 1;
+    }
+  else if (pid == 0)
+    {
+      /* Lock the mutex.  */
+      if (pthread_mutex_lock (m) != 0)
+	{
+	  puts ("child: mutex_lock failed");
+	  return 1;
+	}
+
+      /* Try to get the rwlock.  */
+      if (pthread_rwlock_trywrlock (r) == 0)
+	{
+	  puts ("rwlock_trywrlock succeeded");
+	  return 1;
+	}
+
+      /* Try again.  */
+      struct timespec ts = { .tv_sec = 0, .tv_nsec = 500000000 };
+      int e = pthread_rwlock_timedwrlock (r, &ts);
+      if (e == 0)
+	{
+	  puts ("rwlock_timedwrlock succeeded");
+	  return 1;
+	}
+      if (e != ETIMEDOUT)
+	{
+	  puts ("rwlock_timedwrlock didn't return ETIMEDOUT");
+	  status = 1;
+	}
+
+      if (pthread_rwlock_tryrdlock (r) == 0)
+	{
+	  puts ("rwlock_tryrdlock succeeded");
+	  return 1;
+	}
+
+      e = pthread_rwlock_timedrdlock (r, &ts);
+      if (e == 0)
+	{
+	  puts ("rwlock_timedrdlock succeeded");
+	  return 1;
+	}
+      if (e != ETIMEDOUT)
+	{
+	  puts ("rwlock_timedrdlock didn't return ETIMEDOUT");
+	  status = 1;
+	}
+    }
+  else
+    {
+      /* Lock the rwlock for writing.  */
+      if (pthread_rwlock_wrlock (r) != 0)
+	{
+	  puts ("rwlock_wrlock failed");
+	  kill (pid, SIGTERM);
+	  return 1;
+	}
+
+      /* Allow the child to run.  */
+      if (pthread_mutex_unlock (m) != 0)
+	{
+	  puts ("mutex_unlock failed");
+	  kill (pid, SIGTERM);
+	  return 1;
+	}
+
+      /* Just wait for the child.  */
+      if (TEMP_FAILURE_RETRY (waitpid (pid, &status, 0)) != pid)
+	{
+	  puts ("waitpid failed");
+	  kill (pid, SIGTERM);
+	  return 1;
+	}
+    }
+
+  return status;
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"
diff --git a/sysdeps/pthread/tst-rwlock14.c b/sysdeps/pthread/tst-rwlock14.c
new file mode 100644
index 0000000000..3583b19e3c
--- /dev/null
+++ b/sysdeps/pthread/tst-rwlock14.c
@@ -0,0 +1,96 @@
+/* Copyright (C) 2004-2020 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@redhat.com>, 2004.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#include <errno.h>
+#include <pthread.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <support/check.h>
+#include <support/xthread.h>
+#include <support/xtime.h>
+
+
+static pthread_barrier_t b;
+static pthread_rwlock_t r = PTHREAD_RWLOCK_INITIALIZER;
+
+
+static void *
+tf (void *arg)
+{
+  /* Lock the read-write lock.  */
+  TEST_COMPARE (pthread_rwlock_wrlock (&r), 0);
+
+  pthread_t mt = *(pthread_t *) arg;
+
+  xpthread_barrier_wait (&b);
+
+  /* This call will never return.  */
+  xpthread_join (mt);
+
+  return NULL;
+}
+
+
+static int
+do_test (void)
+{
+  struct timespec ts;
+
+  xclock_gettime (CLOCK_REALTIME, &ts);
+  xpthread_barrier_init (&b, NULL, 2);
+
+  pthread_t me = pthread_self ();
+  xpthread_create (NULL, tf, &me);
+
+  /* Wait until the rwlock is locked.  */
+  xpthread_barrier_wait (&b);
+
+  ts.tv_nsec = -1;
+
+  TEST_COMPARE (pthread_rwlock_timedrdlock (&r, &ts), EINVAL);
+  TEST_COMPARE (pthread_rwlock_clockrdlock (&r, CLOCK_REALTIME, &ts), EINVAL);
+  TEST_COMPARE (pthread_rwlock_clockrdlock (&r, CLOCK_MONOTONIC, &ts), EINVAL);
+  TEST_COMPARE (pthread_rwlock_timedwrlock (&r, &ts), EINVAL);
+  TEST_COMPARE (pthread_rwlock_clockwrlock (&r, CLOCK_REALTIME, &ts), EINVAL);
+  TEST_COMPARE (pthread_rwlock_clockwrlock (&r, CLOCK_MONOTONIC, &ts), EINVAL);
+
+  ts.tv_nsec = 1000000000;
+
+  TEST_COMPARE (pthread_rwlock_timedrdlock (&r, &ts), EINVAL);
+  TEST_COMPARE (pthread_rwlock_clockrdlock (&r, CLOCK_REALTIME, &ts), EINVAL);
+  TEST_COMPARE (pthread_rwlock_clockrdlock (&r, CLOCK_MONOTONIC, &ts), EINVAL);
+  TEST_COMPARE (pthread_rwlock_timedwrlock (&r, &ts), EINVAL);
+  TEST_COMPARE (pthread_rwlock_clockwrlock (&r, CLOCK_REALTIME, &ts), EINVAL);
+  TEST_COMPARE (pthread_rwlock_clockwrlock (&r, CLOCK_MONOTONIC, &ts), EINVAL);
+
+  ts.tv_nsec = (__typeof (ts.tv_nsec)) 0x100001000LL;
+  if ((__typeof (ts.tv_nsec)) 0x100001000LL != 0x100001000LL)
+    ts.tv_nsec = 2000000000;
+
+  TEST_COMPARE (pthread_rwlock_timedrdlock (&r, &ts), EINVAL);
+  TEST_COMPARE (pthread_rwlock_clockrdlock (&r, CLOCK_REALTIME, &ts), EINVAL);
+  TEST_COMPARE (pthread_rwlock_clockrdlock (&r, CLOCK_MONOTONIC, &ts), EINVAL);
+  TEST_COMPARE (pthread_rwlock_timedwrlock (&r, &ts), EINVAL);
+  TEST_COMPARE (pthread_rwlock_clockwrlock (&r, CLOCK_REALTIME, &ts), EINVAL);
+  TEST_COMPARE (pthread_rwlock_clockwrlock (&r, CLOCK_MONOTONIC, &ts), EINVAL);
+
+  return 0;
+}
+
+#include <support/test-driver.c>