1 // RUN: %clang_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
2 #include "test.h"
3
4 int Global;
5
6 extern "C" void AnnotateIgnoreWritesBegin(const char *f, int l);
7 extern "C" void AnnotateIgnoreWritesEnd(const char *f, int l);
8 extern "C" void AnnotateIgnoreReadsBegin(const char *f, int l);
9 extern "C" void AnnotateIgnoreReadsEnd(const char *f, int l);
10
Thread(void * x)11 void *Thread(void *x) {
12 AnnotateIgnoreWritesBegin(__FILE__, __LINE__);
13 AnnotateIgnoreReadsBegin(__FILE__, __LINE__);
14 Global = 42;
15 AnnotateIgnoreReadsEnd(__FILE__, __LINE__);
16 AnnotateIgnoreWritesEnd(__FILE__, __LINE__);
17 barrier_wait(&barrier);
18 return 0;
19 }
20
main()21 int main() {
22 barrier_init(&barrier, 2);
23 pthread_t t;
24 pthread_create(&t, 0, Thread, 0);
25 barrier_wait(&barrier);
26 Global = 43;
27 pthread_join(t, 0);
28 fprintf(stderr, "OK\n");
29 }
30
31 // CHECK-NOT: WARNING: ThreadSanitizer: data race
32