fd_socket_norace.cc revision bd88c187a9eaed794b9098aaf147f9dada8c5131 
1// RUN: %clangxx_tsan -O1 %s -o %t && %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  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
29int 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  printf("OK\n");
49}
50
51// CHECK-NOT: WARNING: ThreadSanitizer: data race
52
53