pthread: Move robust mutex tests from nptl to sysdeps/pthread

tst-robust8.c prints some mutex internals for nptl debugging, this
needed to be made conditioned by getting built with nptl.

11 files changed, 1061 insertions, 0 deletions

diff --git a/sysdeps/pthread/Makefile b/sysdeps/pthread/Makefile
index 396f2b1..b6491d6 100644
--- a/sysdeps/pthread/Makefile
+++ b/sysdeps/pthread/Makefile
@@ -55,6 +55,8 @@ tests += tst-cnd-basic tst-mtx-trylock tst-cnd-broadcast \
 	 tst-key1 tst-key2 tst-key3 tst-key4 \
 	 tst-mutex1 tst-mutex2 tst-mutex3 tst-mutex4 tst-mutex6 tst-mutex10 \
 	 tst-once1 tst-once2 tst-once3 tst-once4 \
+	 tst-robust1 tst-robust2 tst-robust3 tst-robust4 tst-robust5 \
+	 tst-robust6 tst-robust7 tst-robust8 tst-robust9 tst-robust10 \
 	 tst-rwlock1 tst-rwlock4 tst-rwlock5 tst-rwlock13 tst-rwlock16 \
 	 tst-rwlock-tryrdlock-stall tst-rwlock-trywrlock-stall \
 	 tst-sem1 tst-sem2 tst-sem3 tst-sem4 tst-sem6 tst-sem7 \
diff --git a/sysdeps/pthread/tst-robust1.c b/sysdeps/pthread/tst-robust1.c
new file mode 100644
index 0000000..fc21b4f
--- /dev/null
+++ b/sysdeps/pthread/tst-robust1.c
@@ -0,0 +1,338 @@
+/* Copyright (C) 2005-2020 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@redhat.com>, 2005.
+
+   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>
+
+
+static pthread_mutex_t m1;
+static pthread_mutex_t m2;
+static pthread_barrier_t b;
+
+
+#ifndef LOCK
+# define LOCK(m) pthread_mutex_lock (m)
+#endif
+
+
+static void *
+tf (void *arg)
+{
+  long int round = (long int) arg;
+
+  if (pthread_setcancelstate (PTHREAD_CANCEL_ENABLE, NULL) != 0)
+    {
+      printf ("%ld: setcancelstate failed\n", round);
+      exit (1);
+    }
+
+  int e = LOCK (&m1);
+  if (e != 0)
+    {
+      printf ("%ld: child: mutex_lock m1 failed with error %d\n", round, e);
+      exit (1);
+    }
+
+  e = LOCK (&m2);
+  if (e != 0)
+    {
+      printf ("%ld: child: mutex_lock m2 failed with error %d\n", round, e);
+      exit (1);
+    }
+
+  e = pthread_barrier_wait (&b);
+  if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)
+    {
+      printf ("%ld: child: 1st barrier_wait failed\n", round);
+      exit (1);
+    }
+
+  e = pthread_barrier_wait (&b);
+  if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)
+    {
+      printf ("%ld: child: 2nd barrier_wait failed\n", round);
+      exit (1);
+    }
+
+  pthread_testcancel ();
+
+  printf ("%ld: testcancel returned\n", round);
+  exit (1);
+}
+
+
+static int
+do_test (void)
+{
+#ifdef PREPARE_TMO
+  PREPARE_TMO;
+#endif
+
+  pthread_mutexattr_t a;
+  if (pthread_mutexattr_init (&a) != 0)
+    {
+      puts ("mutexattr_init failed");
+      return 1;
+    }
+  if (pthread_mutexattr_setrobust_np (&a, PTHREAD_MUTEX_ROBUST_NP) != 0)
+    {
+      puts ("mutexattr_setrobust failed");
+      return 1;
+    }
+
+#ifdef ENABLE_PI
+  if (pthread_mutexattr_setprotocol (&a, PTHREAD_PRIO_INHERIT) != 0)
+    {
+      puts ("pthread_mutexattr_setprotocol failed");
+      return 1;
+    }
+  else
+    {
+      int e = pthread_mutex_init (&m1, &a);
+      if (e == ENOTSUP)
+	{
+	  puts ("PI robust mutexes not supported");
+	  return 0;
+	}
+      else if (e != 0)
+	{
+	  puts ("mutex_init m1 failed");
+	  return 1;
+	}
+      pthread_mutex_destroy (&m1);
+    }
+#endif
+
+#ifndef NOT_CONSISTENT
+  if (pthread_mutex_init (&m1, &a) != 0)
+    {
+      puts ("mutex_init m1 failed");
+      return 1;
+    }
+
+  if (pthread_mutex_init (&m2, &a) != 0)
+    {
+      puts ("mutex_init m2 failed");
+      return 1;
+    }
+#endif
+
+  if (pthread_barrier_init (&b, NULL, 2) != 0)
+    {
+      puts ("barrier_init failed");
+      return 1;
+    }
+
+  for (long int round = 1; round < 5; ++round)
+    {
+#ifdef NOT_CONSISTENT
+      if (pthread_mutex_init (&m1 , &a) != 0)
+	{
+	  puts ("mutex_init m1 failed");
+	  return 1;
+	}
+      if (pthread_mutex_init (&m2 , &a) != 0)
+	{
+	  puts ("mutex_init m2 failed");
+	  return 1;
+	}
+#endif
+
+      pthread_t th;
+      if (pthread_create (&th, NULL, tf, (void *) round) != 0)
+	{
+	  printf ("%ld: create failed\n", round);
+	  return 1;
+	}
+
+      int e = pthread_barrier_wait (&b);
+      if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)
+	{
+	  printf ("%ld: parent: 1st barrier_wait failed\n", round);
+	  return 1;
+	}
+
+      if (pthread_cancel (th) != 0)
+	{
+	  printf ("%ld: cancel failed\n", round);
+	  return 1;
+	}
+
+      e = pthread_barrier_wait (&b);
+      if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)
+	{
+	  printf ("%ld: parent: 2nd barrier_wait failed\n", round);
+	  return 1;
+	}
+
+#ifndef AFTER_JOIN
+      if (round & 1)
+#endif
+	{
+	  void *res;
+	  if (pthread_join (th, &res) != 0)
+	    {
+	      printf ("%ld: join failed\n", round);
+	      return 1;
+	    }
+	  if (res != PTHREAD_CANCELED)
+	    {
+	      printf ("%ld: thread not canceled\n", round);
+	      return 1;
+	    }
+	}
+
+      e = LOCK (&m1);
+      if (e == 0)
+	{
+	  printf ("%ld: parent: mutex_lock m1 succeeded\n", round);
+	  return 1;
+	}
+      if (e != EOWNERDEAD)
+	{
+	  printf ("%ld: parent: mutex_lock m1 returned wrong code\n", round);
+	  return 1;
+	}
+
+      e = LOCK (&m2);
+      if (e == 0)
+	{
+	  printf ("%ld: parent: mutex_lock m2 succeeded\n", round);
+	  return 1;
+	}
+      if (e != EOWNERDEAD)
+	{
+	  printf ("%ld: parent: mutex_lock m2 returned wrong code\n", round);
+	  return 1;
+	}
+
+#ifndef AFTER_JOIN
+      if ((round & 1) == 0)
+	{
+	  void *res;
+	  if (pthread_join (th, &res) != 0)
+	    {
+	      printf ("%ld: join failed\n", round);
+	      return 1;
+	    }
+	  if (res != PTHREAD_CANCELED)
+	    {
+	      printf ("%ld: thread not canceled\n", round);
+	      return 1;
+	    }
+	}
+#endif
+
+#ifndef NOT_CONSISTENT
+      e = pthread_mutex_consistent_np (&m1);
+      if (e != 0)
+	{
+	  printf ("%ld: mutex_consistent m1 failed with error %d\n", round, e);
+	  return 1;
+	}
+
+      e = pthread_mutex_consistent_np (&m2);
+      if (e != 0)
+	{
+	  printf ("%ld: mutex_consistent m2 failed with error %d\n", round, e);
+	  return 1;
+	}
+#endif
+
+      e = pthread_mutex_unlock (&m1);
+      if (e != 0)
+	{
+	  printf ("%ld: mutex_unlock m1 failed with %d\n", round, e);
+	  return 1;
+	}
+
+      e = pthread_mutex_unlock (&m2);
+      if (e != 0)
+	{
+	  printf ("%ld: mutex_unlock m2 failed with %d\n", round, e);
+	  return 1;
+	}
+
+#ifdef NOT_CONSISTENT
+      e = LOCK (&m1);
+      if (e == 0)
+	{
+	  printf ("%ld: locking inconsistent mutex m1 succeeded\n", round);
+	  return 1;
+	}
+      if (e != ENOTRECOVERABLE)
+	{
+	  printf ("%ld: locking inconsistent mutex m1 failed with error %d\n",
+		  round, e);
+	  return 1;
+	}
+
+      if (pthread_mutex_destroy (&m1) != 0)
+	{
+	  puts ("mutex_destroy m1 failed");
+	  return 1;
+	}
+
+      e = LOCK (&m2);
+      if (e == 0)
+	{
+	  printf ("%ld: locking inconsistent mutex m2 succeeded\n", round);
+	  return 1;
+	}
+      if (e != ENOTRECOVERABLE)
+	{
+	  printf ("%ld: locking inconsistent mutex m2 failed with error %d\n",
+		  round, e);
+	  return 1;
+	}
+
+      if (pthread_mutex_destroy (&m2) != 0)
+	{
+	  puts ("mutex_destroy m2 failed");
+	  return 1;
+	}
+#endif
+    }
+
+#ifndef NOT_CONSISTENT
+  if (pthread_mutex_destroy (&m1) != 0)
+    {
+      puts ("mutex_destroy m1 failed");
+      return 1;
+    }
+
+  if (pthread_mutex_destroy (&m2) != 0)
+    {
+      puts ("mutex_destroy m2 failed");
+      return 1;
+    }
+#endif
+
+  if (pthread_mutexattr_destroy (&a) != 0)
+    {
+      puts ("mutexattr_destroy failed");
+      return 1;
+    }
+
+  return 0;
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"
diff --git a/sysdeps/pthread/tst-robust10.c b/sysdeps/pthread/tst-robust10.c
new file mode 100644
index 0000000..db8b7e3
--- /dev/null
+++ b/sysdeps/pthread/tst-robust10.c
@@ -0,0 +1,110 @@
+/* Test that pthread_mutex_timedlock properly times out.
+   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 <pthread.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+
+pthread_mutex_t mutex;
+
+static void *
+thr (void *arg)
+{
+  struct timespec abstime;
+  clock_gettime (CLOCK_REALTIME, &abstime);
+  abstime.tv_sec += 1;
+  int ret = pthread_mutex_timedlock (&mutex, &abstime);
+  if (ret == 0)
+    {
+      puts ("mutex_timedlock didn't fail");
+      exit (1);
+    }
+  if (ret != ETIMEDOUT)
+    {
+      printf ("mutex_timedlock failed: %s\n", strerror (ret));
+      exit (1);
+    }
+
+  return 0;
+}
+
+static int
+do_test (void)
+{
+  pthread_t pt;
+  pthread_mutexattr_t ma;
+
+  if (pthread_mutexattr_init (&ma) != 0)
+    {
+      puts ("mutexattr_init failed");
+      return 0;
+    }
+  if (pthread_mutexattr_setrobust_np (&ma, PTHREAD_MUTEX_ROBUST_NP) != 0)
+    {
+      puts ("mutexattr_setrobust failed");
+      return 1;
+    }
+  if (pthread_mutex_init (&mutex, &ma))
+    {
+      puts ("mutex_init failed");
+      return 1;
+    }
+
+  if (pthread_mutexattr_destroy (&ma))
+    {
+      puts ("mutexattr_destroy failed");
+      return 1;
+    }
+
+  if (pthread_mutex_lock (&mutex))
+    {
+      puts ("mutex_lock failed");
+      return 1;
+    }
+
+  if (pthread_create (&pt, NULL, thr, NULL))
+    {
+      puts ("pthread_create failed");
+      return 1;
+    }
+
+  if (pthread_join (pt, NULL))
+    {
+      puts ("pthread_join failed");
+      return 1;
+    }
+
+  if (pthread_mutex_unlock (&mutex))
+    {
+      puts ("mutex_unlock failed");
+      return 1;
+    }
+
+  if (pthread_mutex_destroy (&mutex))
+    {
+      puts ("mutex_destroy failed");
+      return 1;
+    }
+
+  return 0;
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"
diff --git a/sysdeps/pthread/tst-robust2.c b/sysdeps/pthread/tst-robust2.c
new file mode 100644
index 0000000..cf603fe
--- /dev/null
+++ b/sysdeps/pthread/tst-robust2.c
@@ -0,0 +1,3 @@
+#define AFTER_JOIN 1
+#define LOCK(m) pthread_mutex_trylock (m)
+#include "tst-robust1.c"
diff --git a/sysdeps/pthread/tst-robust3.c b/sysdeps/pthread/tst-robust3.c
new file mode 100644
index 0000000..e56f276
--- /dev/null
+++ b/sysdeps/pthread/tst-robust3.c
@@ -0,0 +1,20 @@
+#include <time.h>
+#include <sys/time.h>
+
+
+static struct timespec tmo;
+
+
+#define PREPARE_TMO \
+  do {									      \
+    struct timeval tv;							      \
+    gettimeofday (&tv, NULL);						      \
+									      \
+    /* Define the timeout as one hour in the future.  */		      \
+    tmo.tv_sec = tv.tv_sec + 3600;					      \
+    tmo.tv_nsec = 0;							      \
+  } while (0)
+
+
+#define LOCK(m) pthread_mutex_timedlock (m, &tmo)
+#include "tst-robust1.c"
diff --git a/sysdeps/pthread/tst-robust4.c b/sysdeps/pthread/tst-robust4.c
new file mode 100644
index 0000000..b9c42b8
--- /dev/null
+++ b/sysdeps/pthread/tst-robust4.c
@@ -0,0 +1,2 @@
+#define NOT_CONSISTENT 1
+#include "tst-robust1.c"
diff --git a/sysdeps/pthread/tst-robust5.c b/sysdeps/pthread/tst-robust5.c
new file mode 100644
index 0000000..b83d3d6
--- /dev/null
+++ b/sysdeps/pthread/tst-robust5.c
@@ -0,0 +1,2 @@
+#define NOT_CONSISTENT 1
+#include "tst-robust2.c"
diff --git a/sysdeps/pthread/tst-robust6.c b/sysdeps/pthread/tst-robust6.c
new file mode 100644
index 0000000..6713396
--- /dev/null
+++ b/sysdeps/pthread/tst-robust6.c
@@ -0,0 +1,2 @@
+#define NOT_CONSISTENT 1
+#include "tst-robust3.c"
diff --git a/sysdeps/pthread/tst-robust7.c b/sysdeps/pthread/tst-robust7.c
new file mode 100644
index 0000000..be8e749
--- /dev/null
+++ b/sysdeps/pthread/tst-robust7.c
@@ -0,0 +1,212 @@
+/* Copyright (C) 2005-2020 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@redhat.com>, 2005.
+
+   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 <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+
+static pthread_barrier_t b;
+static pthread_cond_t c = PTHREAD_COND_INITIALIZER;
+static pthread_mutex_t m;
+static bool first = true;
+
+
+static void *
+tf (void *arg)
+{
+  long int n = (long int) arg;
+
+  if (pthread_mutex_lock (&m) != 0)
+    {
+      printf ("thread %ld: mutex_lock failed\n", n + 1);
+      exit (1);
+    }
+
+  int e = pthread_barrier_wait (&b);
+  if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)
+    {
+      printf ("thread %ld: barrier_wait failed\n", n + 1);
+      exit (1);
+    }
+
+  e = pthread_cond_wait (&c, &m);
+  if (first)
+    {
+      if (e != 0)
+	{
+	  printf ("thread %ld: cond_wait failed\n", n + 1);
+	  exit (1);
+	}
+      first = false;
+    }
+  else
+    {
+      if (e != EOWNERDEAD)
+	{
+	  printf ("thread %ld: cond_wait did not return EOWNERDEAD\n", n + 1);
+	  exit (1);
+	}
+    }
+
+  if (pthread_cancel (pthread_self ()) != 0)
+    {
+      printf ("thread %ld: cancel failed\n", n + 1);
+      exit (1);
+    }
+
+  pthread_testcancel ();
+
+  printf ("thread %ld: testcancel returned\n", n + 1);
+  exit (1);
+}
+
+
+static int
+do_test (void)
+{
+  pthread_mutexattr_t a;
+  if (pthread_mutexattr_init (&a) != 0)
+    {
+      puts ("mutexattr_init failed");
+      return 1;
+    }
+
+  if (pthread_mutexattr_setrobust_np (&a, PTHREAD_MUTEX_ROBUST_NP) != 0)
+    {
+      puts ("mutexattr_setrobust failed");
+      return 1;
+    }
+
+#ifdef ENABLE_PI
+  if (pthread_mutexattr_setprotocol (&a, PTHREAD_PRIO_INHERIT) != 0)
+    {
+      puts ("pthread_mutexattr_setprotocol failed");
+      return 1;
+    }
+#endif
+
+  int e;
+  e = pthread_mutex_init (&m, &a);
+  if (e != 0)
+    {
+#ifdef ENABLE_PI
+      if (e == ENOTSUP)
+	{
+	  puts ("PI robust mutexes not supported");
+	  return 0;
+	}
+#endif
+      puts ("mutex_init failed");
+      return 1;
+    }
+
+  if (pthread_mutexattr_destroy (&a) != 0)
+    {
+      puts ("mutexattr_destroy failed");
+      return 1;
+    }
+
+  if (pthread_barrier_init (&b, NULL, 2) != 0)
+    {
+      puts ("barrier_init failed");
+      return 1;
+    }
+
+#define N 5
+  pthread_t th[N];
+  for (long int n = 0; n < N; ++n)
+    {
+      if (pthread_create (&th[n], NULL, tf, (void *) n) != 0)
+	{
+	  printf ("pthread_create loop %ld failed\n", n + 1);
+	  return 1;
+	}
+
+      e = pthread_barrier_wait (&b);
+      if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)
+	{
+	  printf ("parent: barrier_wait failed in round %ld\n", n + 1);
+	  return 1;
+	}
+    }
+
+  if (pthread_mutex_lock (&m) != 0)
+    {
+      puts ("parent: mutex_lock failed");
+      return 1;
+    }
+
+  if (pthread_mutex_unlock (&m) != 0)
+    {
+      puts ("parent: mutex_unlock failed");
+      return 1;
+    }
+
+  if (pthread_cond_broadcast (&c) != 0)
+    {
+      puts ("cond_broadcast failed");
+      return 1;
+    }
+
+  for (int n = 0; n < N; ++n)
+    {
+      void *res;
+      if (pthread_join (th[n], &res) != 0)
+	{
+	  printf ("join round %d failed\n", n + 1);
+	  return 1;
+	}
+      if (res != PTHREAD_CANCELED)
+	{
+	  printf ("thread %d not canceled\n", n + 1);
+	  return 1;
+	}
+    }
+
+  e = pthread_mutex_lock (&m);
+  if (e == 0)
+    {
+      puts ("parent: 2nd mutex_lock succeeded");
+      return 1;
+    }
+  if (e != EOWNERDEAD)
+    {
+      puts ("parent: mutex_lock did not return EOWNERDEAD");
+      return 1;
+    }
+
+  if (pthread_mutex_unlock (&m) != 0)
+    {
+      puts ("parent: 2nd mutex_unlock failed");
+      return 1;
+    }
+
+  if (pthread_mutex_destroy (&m) != 0)
+    {
+      puts ("mutex_destroy failed");
+      return 1;
+    }
+
+  return 0;
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"
diff --git a/sysdeps/pthread/tst-robust8.c b/sysdeps/pthread/tst-robust8.c
new file mode 100644
index 0000000..27dd53d
--- /dev/null
+++ b/sysdeps/pthread/tst-robust8.c
@@ -0,0 +1,277 @@
+#include <pthread.h>
+#include <signal.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/mman.h>
+#include <sys/wait.h>
+
+#include <pthreadP.h>
+
+
+
+static void prepare (void);
+#define PREPARE(argc, argv) prepare ()
+static int do_test (void);
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"
+
+
+static int fd;
+#define N 100
+
+static void
+prepare (void)
+{
+  fd = create_temp_file ("tst-robust8", NULL);
+  if (fd == -1)
+    exit (1);
+}
+
+
+#define THESIGNAL SIGKILL
+#define ROUNDS 5
+#define THREADS 9
+
+
+static const struct timespec before = { 0, 0 };
+
+
+static pthread_mutex_t *map;
+
+
+static void *
+tf (void *arg)
+{
+  long int nr = (long int) arg;
+  int fct = nr % 3;
+
+  uint8_t state[N];
+  memset (state, '\0', sizeof (state));
+
+  while (1)
+    {
+      int r = random () % N;
+      if (state[r] == 0)
+	{
+	  int e;
+
+	  switch (fct)
+	    {
+	    case 0:
+	      e = pthread_mutex_lock (&map[r]);
+	      if (e != 0)
+		{
+		  printf ("mutex_lock of %d in thread %ld failed with %d\n",
+			  r, nr, e);
+		  exit (1);
+		}
+	      state[r] = 1;
+	      break;
+	    case 1:
+	      e = pthread_mutex_timedlock (&map[r], &before);
+	      if (e != 0 && e != ETIMEDOUT)
+		{
+		  printf ("\
+mutex_timedlock of %d in thread %ld failed with %d\n",
+			  r, nr, e);
+		  exit (1);
+		}
+	      break;
+	    default:
+	      e = pthread_mutex_trylock (&map[r]);
+	      if (e != 0 && e != EBUSY)
+		{
+		  printf ("mutex_trylock of %d in thread %ld failed with %d\n",
+			  r, nr, e);
+		  exit (1);
+		}
+	      break;
+	    }
+
+	  if (e == EOWNERDEAD)
+	    pthread_mutex_consistent_np (&map[r]);
+
+	  if (e == 0 || e == EOWNERDEAD)
+	    state[r] = 1;
+	}
+      else
+	{
+	  int e = pthread_mutex_unlock (&map[r]);
+	  if (e != 0)
+	    {
+	      printf ("mutex_unlock of %d in thread %ld failed with %d\n",
+		      r, nr, e);
+	      exit (1);
+	    }
+
+	  state[r] = 0;
+	}
+    }
+}
+
+
+static void
+child (int round)
+{
+  for (int thread = 1; thread <= THREADS; ++thread)
+    {
+      pthread_t th;
+      if (pthread_create (&th, NULL, tf, (void *) (long int) thread) != 0)
+	{
+	  printf ("cannot create thread %d in round %d\n", thread, round);
+	  exit (1);
+	}
+    }
+
+  struct timespec ts;
+  ts.tv_sec = 0;
+  ts.tv_nsec = 1000000000 / ROUNDS;
+  while (nanosleep (&ts, &ts) != 0)
+    /* nothing */;
+
+  /* Time to die.  */
+  kill (getpid (), THESIGNAL);
+
+  /* We better never get here.  */
+  abort ();
+}
+
+
+static int
+do_test (void)
+{
+  if (ftruncate (fd, N * sizeof (pthread_mutex_t)) != 0)
+    {
+      puts ("cannot size new file");
+      return 1;
+    }
+
+  map = mmap (NULL, N * sizeof (pthread_mutex_t), PROT_READ | PROT_WRITE,
+	      MAP_SHARED, fd, 0);
+  if (map == MAP_FAILED)
+    {
+      puts ("mapping failed");
+      return 1;
+    }
+
+  pthread_mutexattr_t ma;
+  if (pthread_mutexattr_init (&ma) != 0)
+    {
+      puts ("mutexattr_init failed");
+      return 0;
+    }
+  if (pthread_mutexattr_setrobust_np (&ma, PTHREAD_MUTEX_ROBUST_NP) != 0)
+    {
+      puts ("mutexattr_setrobust failed");
+      return 1;
+    }
+  if (pthread_mutexattr_setpshared (&ma, PTHREAD_PROCESS_SHARED) != 0)
+    {
+      puts ("mutexattr_setpshared failed");
+      return 1;
+    }
+#ifdef ENABLE_PI
+  if (pthread_mutexattr_setprotocol (&ma, PTHREAD_PRIO_INHERIT) != 0)
+    {
+      puts ("pthread_mutexattr_setprotocol failed");
+      return 1;
+    }
+#endif
+
+  for (int round = 1; round <= ROUNDS; ++round)
+    {
+      for (int n = 0; n < N; ++n)
+	{
+	  int e = pthread_mutex_init (&map[n], &ma);
+	  if (e == ENOTSUP)
+	    {
+#ifdef ENABLE_PI
+	      puts ("cannot support pshared robust PI mutexes");
+#else
+	      puts ("cannot support pshared robust mutexes");
+#endif
+	      return 0;
+	    }
+	  if (e != 0)
+	    {
+	      printf ("mutex_init %d in round %d failed\n", n + 1, round);
+	      return 1;
+	    }
+	}
+
+      pid_t p = fork ();
+      if (p == -1)
+	{
+	  printf ("fork in round %d failed\n", round);
+	  return 1;
+	}
+      if (p == 0)
+	child (round);
+
+      int status;
+      if (TEMP_FAILURE_RETRY (waitpid (p, &status, 0)) != p)
+	{
+	  printf ("waitpid in round %d failed\n", round);
+	  return 1;
+	}
+      if (!WIFSIGNALED (status))
+	{
+	  printf ("child did not die of a signal in round %d\n", round);
+	  return 1;
+	}
+      if (WTERMSIG (status) != THESIGNAL)
+	{
+	  printf ("child did not die of signal %d in round %d\n",
+		  THESIGNAL, round);
+	  return 1;
+	}
+
+      for (int n = 0; n < N; ++n)
+	{
+	  int e = pthread_mutex_lock (&map[n]);
+	  if (e != 0 && e != EOWNERDEAD)
+	    {
+	      printf ("mutex_lock %d failed in round %d\n", n + 1, round);
+	      return 1;
+	    }
+	}
+
+      for (int n = 0; n < N; ++n)
+	if (pthread_mutex_unlock (&map[n]) != 0)
+	  {
+	    printf ("mutex_unlock %d failed in round %d\n", n + 1, round);
+	    return 1;
+	  }
+
+      for (int n = 0; n < N; ++n)
+	{
+	  int e = pthread_mutex_destroy (&map[n]);
+	  if (e != 0)
+	    {
+	      printf ("mutex_destroy %d in round %d failed with %d\n",
+		      n + 1, round, e);
+#ifdef __PTHREAD_NPTL
+	      printf("nusers = %d\n", (int) map[n].__data.__nusers);
+#endif
+	      return 1;
+	    }
+	}
+    }
+
+  if (pthread_mutexattr_destroy (&ma) != 0)
+    {
+      puts ("mutexattr_destroy failed");
+      return 1;
+    }
+
+  if (munmap (map, N * sizeof (pthread_mutex_t)) != 0)
+    {
+      puts ("munmap failed");
+      return 1;
+    }
+
+  return 0;
+}
diff --git a/sysdeps/pthread/tst-robust9.c b/sysdeps/pthread/tst-robust9.c
new file mode 100644
index 0000000..befc14f
--- /dev/null
+++ b/sysdeps/pthread/tst-robust9.c
@@ -0,0 +1,93 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <pthread.h>
+#include <unistd.h>
+#include <sys/time.h>
+
+
+static pthread_mutex_t m;
+
+static void *
+tf (void *data)
+{
+  int err = pthread_mutex_lock (&m);
+  if (err == EOWNERDEAD)
+    {
+      err = pthread_mutex_consistent_np (&m);
+      if (err)
+	{
+	  puts ("pthread_mutex_consistent_np");
+	  exit (1);
+	}
+    }
+  else if (err)
+    {
+      puts ("pthread_mutex_lock");
+      exit (1);
+    }
+  printf ("thread%ld got the lock.\n", (long int) data);
+  sleep (1);
+  /* exit without unlock */
+  return NULL;
+}
+
+static int
+do_test (void)
+{
+  int err, i;
+  pthread_t t[3];
+  pthread_mutexattr_t ma;
+
+  pthread_mutexattr_init (&ma);
+  err = pthread_mutexattr_setrobust_np (&ma, PTHREAD_MUTEX_ROBUST_NP);
+  if (err)
+    {
+      puts ("pthread_mutexattr_setrobust_np");
+      return 1;
+    }
+#ifdef ENABLE_PI
+  if (pthread_mutexattr_setprotocol (&ma, PTHREAD_PRIO_INHERIT) != 0)
+    {
+      puts ("pthread_mutexattr_setprotocol failed");
+      return 1;
+    }
+#endif
+  err = pthread_mutex_init (&m, &ma);
+#ifdef ENABLE_PI
+  if (err == ENOTSUP)
+    {
+      puts ("PI robust mutexes not supported");
+      return 0;
+    }
+#endif
+  if (err)
+    {
+      puts ("pthread_mutex_init");
+      return 1;
+    }
+
+  for (i = 0; i < sizeof (t) / sizeof (t[0]); i++)
+    {
+      err = pthread_create (&t[i], NULL, tf, (void *) (long int) i);
+      if (err)
+	{
+	  puts ("pthread_create");
+	  return 1;
+	}
+    }
+
+  for (i = 0; i < sizeof (t) / sizeof (t[0]); i++)
+    {
+      err = pthread_join (t[i], NULL);
+      if (err)
+	{
+	  puts ("pthread_join");
+	  return 1;
+	}
+    }
+  return 0;
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"