63 lines · cpp
1// RUN: %clangxx_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s2#include <arpa/inet.h>3#include <assert.h>4#include <netinet/in.h>5#include <pthread.h>6#include <stdio.h>7#include <stdlib.h>8#include <sys/socket.h>9#include <sys/types.h>10#include <unistd.h>11 12struct sockaddr_in addr4;13struct sockaddr_in6 addr6;14struct sockaddr *addr;15socklen_t addrlen;16int X;17 18void *ClientThread(void *x) {19 int c = socket(addr->sa_family, SOCK_STREAM, IPPROTO_TCP);20 X = 42;21 if (connect(c, addr, addrlen)) {22 perror("connect");23 exit(1);24 }25 close(c);26 return NULL;27}28 29int main() {30 addr4.sin_family = AF_INET;31 addr4.sin_addr.s_addr = htonl(INADDR_LOOPBACK);32 addr4.sin_port = INADDR_ANY;33 addr = (struct sockaddr *)&addr4;34 addrlen = sizeof(addr4);35 36 int s = socket(addr->sa_family, SOCK_STREAM, IPPROTO_TCP);37 if (s <= 0) {38 // Try to fall-back to IPv639 addr6.sin6_family = AF_INET6;40 addr6.sin6_addr = in6addr_loopback;41 addr6.sin6_port = INADDR_ANY;42 addr = (struct sockaddr *)&addr6;43 addrlen = sizeof(addr6);44 s = socket(addr->sa_family, SOCK_STREAM, IPPROTO_TCP);45 }46 assert(s > 0);47 48 bind(s, addr, addrlen);49 getsockname(s, addr, &addrlen);50 listen(s, 10);51 pthread_t t;52 pthread_create(&t, 0, ClientThread, 0);53 int c = accept(s, 0, 0);54 X = 42;55 pthread_join(t, 0);56 close(c);57 close(s);58 fprintf(stderr, "OK\n");59}60 61// CHECK-NOT: WARNING: ThreadSanitizer: data race62 63