1 // RUN: %clangxx_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
2 #include <pthread.h>
3 #include <stdio.h>
4 #include <stdlib.h>
5 #include <unistd.h>
6 #include <sys/types.h>
7 #include <sys/socket.h>
8 #include <netinet/in.h>
9 #include <arpa/inet.h>
10
11 struct sockaddr_in addr;
12 int X;
13
ClientThread(void * x)14 void *ClientThread(void *x) {
15 int c = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
16 X = 42;
17 if (connect(c, (struct sockaddr*)&addr, sizeof(addr))) {
18 perror("connect");
19 exit(1);
20 }
21 close(c);
22 return NULL;
23 }
24
main()25 int main() {
26 int s = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
27 addr.sin_family = AF_INET;
28 inet_pton(AF_INET, "127.0.0.1", &addr.sin_addr);
29 addr.sin_port = INADDR_ANY;
30 socklen_t len = sizeof(addr);
31 bind(s, (sockaddr*)&addr, len);
32 getsockname(s, (sockaddr*)&addr, &len);
33 listen(s, 10);
34 pthread_t t;
35 pthread_create(&t, 0, ClientThread, 0);
36 int c = accept(s, 0, 0);
37 X = 42;
38 pthread_join(t, 0);
39 close(c);
40 close(s);
41 printf("OK\n");
42 }
43
44 // CHECK-NOT: WARNING: ThreadSanitizer: data race
45
46