1// RUN: %clang_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
2#include "test.h"
3
4int Global;
5int WTFGlobal;
6
7extern "C" {
8void AnnotateBenignRaceSized(const char *f, int l,
9 void *mem, unsigned int size, const char *desc);
10void WTFAnnotateBenignRaceSized(const char *f, int l,
11 void *mem, unsigned int size,
12 const char *desc);
13}
14
15
16void *Thread(void *x) {
17 Global = 42;
18 WTFGlobal = 142;
19 barrier_wait(&barrier);
20 return 0;
21}
22
23int main() {
24 barrier_init(&barrier, 2);
25 AnnotateBenignRaceSized(__FILE__, __LINE__,
26 &Global, sizeof(Global), "Race on Global");
27 WTFAnnotateBenignRaceSized(__FILE__, __LINE__,
28 &WTFGlobal, sizeof(WTFGlobal),
29 "Race on WTFGlobal");
30 pthread_t t;
31 pthread_create(&t, 0, Thread, 0);
32 barrier_wait(&barrier);
33 Global = 43;
34 WTFGlobal = 143;
35 pthread_join(t, 0);
36 fprintf(stderr, "OK\n");
37}
38
39// CHECK-NOT: WARNING: ThreadSanitizer: data race
40