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/* PR sanitizer/65400 */
/* { dg-shouldfail "tsan" } */
/* { dg-additional-options "-fno-omit-frame-pointer -ldl" } */
#include <pthread.h>
#include "tsan_barrier.h"
static pthread_barrier_t barrier;
int v;
int
fn1 (int a, int b, int c)
{
int r = (a ^ b) % c;
r = r * a * b + c;
r = (r ^ b) % c;
return r;
}
int
fn2 (int a, int b, int c)
{
int r = (a ^ b) % c;
r = r * a * b + c;
r = (r ^ b) % c;
return r;
}
__attribute__((noinline, noclone)) void
foo (void)
{
barrier_wait (&barrier);
barrier_wait (&barrier);
v++;
}
__attribute__((noinline, noclone)) void
bar (void)
{
int (*fna) (int, int, int);
int (*fnb) (int, int, int);
int i;
asm ("" : "=g" (fna) : "0" (fn1));
asm ("" : "=g" (fnb) : "0" (fn2));
for (i = 0; i < 128; i++)
{
fna (0, 0, i + 1);
fnb (0, 0, i + 1);
}
foo ();
}
__attribute__((noinline, noclone)) void *
tf (void *arg)
{
(void) arg;
bar ();
return NULL;
}
int
main ()
{
pthread_t th;
barrier_init (&barrier, 2);
if (pthread_create (&th, NULL, tf, NULL))
return 0;
barrier_wait (&barrier);
v++;
barrier_wait (&barrier);
pthread_join (th, NULL);
return 0;
}
/* { dg-output "WARNING: ThreadSanitizer: data race.*#2 _?tf" } */
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