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// RUN: %clangxx_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
#include "test.h"
const int kTestCount = 3;
typedef long long T;
T data[kTestCount];
T atomics[kTestCount];
void *Thread(void *p) {
for (int i = 0; i < kTestCount; i++) {
barrier_wait(&barrier);
while (__atomic_load_n(&atomics[i], __ATOMIC_ACQUIRE) == 0) {
}
data[i]++;
}
return 0;
}
int main() {
barrier_init(&barrier, 2);
pthread_t t;
pthread_create(&t, 0, Thread, 0);
for (int i = 0; i < kTestCount; i++) {
barrier_wait(&barrier);
// We want the release to happen while the other thread
// spins calling load-acquire. This can expose some
// interesting interleavings of release and acquire.
usleep(100 * 1000);
data[i] = 1;
switch (i) {
case 0:
__atomic_store_n(&atomics[i], 1, __ATOMIC_RELEASE);
break;
case 1:
__atomic_fetch_add(&atomics[1], 1, __ATOMIC_RELEASE);
break;
case 2:
T cmp = 0;
__atomic_compare_exchange_n(&atomics[2], &cmp, 1, false, __ATOMIC_RELEASE, __ATOMIC_RELAXED);
break;
}
}
pthread_join(t, 0);
fprintf(stderr, "DONE\n");
}
// CHECK-NOT: ThreadSanitizer: data race
// CHECK: DONE
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