| // RUN: %clangxx_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s |
| #include "test.h" |
| |
| int *g; |
| |
| void *Thread(void *a) { |
| int *p = 0; |
| while ((p = __atomic_load_n(&g, __ATOMIC_RELAXED)) == 0) |
| usleep(100); // spin-wait |
| *p = 42; |
| return 0; |
| } |
| |
| int main() { |
| pthread_t t; |
| pthread_create(&t, 0, Thread, 0); |
| AnnotateIgnoreWritesBegin(__FILE__, __LINE__); |
| int *p = new int(0); |
| AnnotateIgnoreWritesEnd(__FILE__, __LINE__); |
| __atomic_store_n(&g, p, __ATOMIC_RELAXED); |
| pthread_join(t, 0); |
| delete p; |
| fprintf(stderr, "OK\n"); |
| return 0; |
| } |
| |
| // CHECK-NOT: WARNING: ThreadSanitizer: data race |
| // CHECK: OK |
