test/tsan/fd_socket_connect_norace.cc

   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
  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
  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