1 #include <stdlib.h>
2 #include <stdio.h>
3 #include <pthread.h>
4 #include <sched.h>
5 
6 static void *
7 func (void *p)
8 {
9   int *counter = (int *) p;
10   unsigned i;
11 
12   for (i=0; i<100; i++)
13     {
14       (*counter) ++;
15       {
16 	int array[17];
17 	unsigned x = i % (sizeof(array)/sizeof(array[0]));
18 	/* VRP could prove that x is within [0,16], but until then, the
19 	   following access will ensure that array[] is registered to
20 	   libmudflap. */
21 	array[x] = i;
22       }
23       sched_yield (); /* sleep (1); */
24     }
25 
26   return (NULL);
27 }
28 
29 
30 int main ()
31 {
32   int rc;
33   unsigned i;
34   enum foo { NT=10 };
35   pthread_t threads[NT];
36   int counts[NT];
37 
38 
39   for (i=0; i<NT; i++)
40     {
41       counts[i] = 0;
42       rc = pthread_create (& threads[i], NULL, func, (void *) & counts[i]);
43       if (rc) abort();
44     }
45 
46   for (i=0; i<NT; i++)
47     {
48       rc = pthread_join (threads[i], NULL);
49       if (rc) abort();
50       printf ("%d%s", counts[i], (i==NT-1) ? "\n" : " ");
51     }
52 
53   return 0;
54 }
55 
56 /* { dg-output "100 100 100 100 100 100 100 100 100 100" } */
57 /* { dg-repetitions 20 } */
58 /* { dg-timeout 10 } */
59