70 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 X = 42;20 int c = socket(addr->sa_family, SOCK_STREAM, IPPROTO_TCP);21 if (connect(c, addr, addrlen)) {22 perror("connect");23 exit(1);24 }25 if (send(c, "a", 1, 0) != 1) {26 perror("send");27 exit(1);28 }29 close(c);30 return NULL;31}32 33int main() {34 addr4.sin_family = AF_INET;35 addr4.sin_addr.s_addr = htonl(INADDR_LOOPBACK);36 addr4.sin_port = INADDR_ANY;37 addr = (struct sockaddr *)&addr4;38 addrlen = sizeof(addr4);39 40 int s = socket(addr->sa_family, SOCK_STREAM, IPPROTO_TCP);41 if (s <= 0) {42 // Try to fall-back to IPv643 addr6.sin6_family = AF_INET6;44 addr6.sin6_addr = in6addr_loopback;45 addr6.sin6_port = INADDR_ANY;46 addr = (struct sockaddr *)&addr6;47 addrlen = sizeof(addr6);48 s = socket(addr->sa_family, SOCK_STREAM, IPPROTO_TCP);49 }50 assert(s > 0);51 52 bind(s, addr, addrlen);53 getsockname(s, addr, &addrlen);54 listen(s, 10);55 pthread_t t;56 pthread_create(&t, 0, ClientThread, 0);57 int c = accept(s, 0, 0);58 char buf;59 while (read(c, &buf, 1) != 1) {60 }61 X = 43;62 close(c);63 close(s);64 pthread_join(t, 0);65 fprintf(stderr, "OK\n");66}67 68// CHECK-NOT: WARNING: ThreadSanitizer: data race69 70