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 X = 42;
16 int c = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
17 if (connect(c, (struct sockaddr*)&addr, sizeof(addr))) {
18 perror("connect");
19 exit(1);
20 }
21 if (send(c, "a", 1, 0) != 1) {
22 perror("send");
23 exit(1);
24 }
25 close(c);
26 return NULL;
27 }
28
main()29 int main() {
30 int s = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
31 addr.sin_family = AF_INET;
32 inet_pton(AF_INET, "127.0.0.1", &addr.sin_addr);
33 addr.sin_port = INADDR_ANY;
34 socklen_t len = sizeof(addr);
35 bind(s, (sockaddr*)&addr, len);
36 getsockname(s, (sockaddr*)&addr, &len);
37 listen(s, 10);
38 pthread_t t;
39 pthread_create(&t, 0, ClientThread, 0);
40 int c = accept(s, 0, 0);
41 char buf;
42 while (read(c, &buf, 1) != 1) {
43 }
44 X = 43;
45 close(c);
46 close(s);
47 pthread_join(t, 0);
48 fprintf(stderr, "OK\n");
49 }
50
51 // CHECK-NOT: WARNING: ThreadSanitizer: data race
52
53