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#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>
static void prepare (void);
#define PREPARE(argc, argv) prepare ()
static int do_test (void);
#define TEST_FUNCTION do_test ()
#define TIMEOUT 3
#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;
}
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)
{
puts ("cannot support pshared robust mutexes");
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);
printf("nusers = %d\n", (int) map[n].__data.__nusers);
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;
}
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