forked from OSchip/llvm-project
70 lines
1.5 KiB
C++
70 lines
1.5 KiB
C++
// RUN: %clangxx_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
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#include <arpa/inet.h>
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#include <assert.h>
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#include <netinet/in.h>
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#include <pthread.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/socket.h>
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#include <sys/types.h>
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#include <unistd.h>
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struct sockaddr_in addr4;
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struct sockaddr_in6 addr6;
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struct sockaddr *addr;
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socklen_t addrlen;
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int X;
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void *ClientThread(void *x) {
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X = 42;
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int c = socket(addr->sa_family, SOCK_STREAM, IPPROTO_TCP);
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if (connect(c, addr, addrlen)) {
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perror("connect");
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exit(1);
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}
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if (send(c, "a", 1, 0) != 1) {
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perror("send");
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exit(1);
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}
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close(c);
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return NULL;
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}
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int main() {
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addr4.sin_family = AF_INET;
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addr4.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
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addr4.sin_port = INADDR_ANY;
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addr = (struct sockaddr *)&addr4;
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addrlen = sizeof(addr4);
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int s = socket(addr->sa_family, SOCK_STREAM, IPPROTO_TCP);
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if (s <= 0) {
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// Try to fall-back to IPv6
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addr6.sin6_family = AF_INET6;
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addr6.sin6_addr = in6addr_loopback;
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addr6.sin6_port = INADDR_ANY;
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addr = (struct sockaddr *)&addr6;
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addrlen = sizeof(addr6);
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s = socket(addr->sa_family, SOCK_STREAM, IPPROTO_TCP);
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}
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assert(s > 0);
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bind(s, addr, addrlen);
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getsockname(s, addr, &addrlen);
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listen(s, 10);
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pthread_t t;
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pthread_create(&t, 0, ClientThread, 0);
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int c = accept(s, 0, 0);
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char buf;
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while (read(c, &buf, 1) != 1) {
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}
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X = 43;
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close(c);
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close(s);
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pthread_join(t, 0);
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fprintf(stderr, "OK\n");
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}
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// CHECK-NOT: WARNING: ThreadSanitizer: data race
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