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
11struct sockaddr_in addr;
12int X;
13
14void *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
25int 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