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// RUN: %clangxx_tsan -O1 %s -o %t && not %t 2>&1 | FileCheck %s
#include <pthread.h>
#include <unistd.h>
int Global;
void *Thread1(void *x) {
sleep(1);
__atomic_fetch_add(&Global, 1, __ATOMIC_RELAXED);
return NULL;
}
void *Thread2(void *x) {
Global++;
return NULL;
}
int main() {
pthread_t t[2];
pthread_create(&t[0], NULL, Thread1, NULL);
pthread_create(&t[1], NULL, Thread2, NULL);
pthread_join(t[0], NULL);
pthread_join(t[1], NULL);
}
// CHECK: WARNING: ThreadSanitizer: data race
// CHECK: Atomic write of size 4
// CHECK: #0 __tsan_atomic32_fetch_add
// CHECK: #1 Thread1
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