1// RUN: %clang_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
2#include "test.h"
3
4// Test for https://llvm.org/bugs/show_bug.cgi?id=23235
5// The bug was that synchronization between thread creation and thread start
6// is not established if pthread_create is followed by pthread_detach.
7
8int x;
9
10void *Thread(void *a) {
11 x = 42;
12 barrier_wait(&barrier);
13 return 0;
14}
15
16int main() {
17 barrier_init(&barrier, 2);
18 pthread_t t;
19 x = 43;
20 pthread_create(&t, 0, Thread, 0);
21 pthread_detach(t);
22 barrier_wait(&barrier);
23 fprintf(stderr, "PASS\n");
24 return 0;
25}
26
27// CHECK-NOT: WARNING: ThreadSanitizer: data race
28// CHECK: PASS
29