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// RUN: %clang_tsan -O1 %s -o %t && TSAN_OPTIONS="$TSAN_OPTIONS halt_on_error=1" %deflake %run %t | FileCheck %s
#include <pthread.h>
#include <stdio.h>
#include <unistd.h>
int X;
void *Thread(void *x) {
sleep(1);
X = 42;
return 0;
}
int main() {
fprintf(stderr, "BEFORE\n");
pthread_t t;
pthread_create(&t, 0, Thread, 0);
X = 43;
pthread_join(t, 0);
fprintf(stderr, "AFTER\n");
return 0;
}
// CHECK: BEFORE
// CHECK: WARNING: ThreadSanitizer: data race
// CHECK-NOT: AFTER
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