35 lines · cpp
1// RUN: %clangxx_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s2#include <pthread.h>3#include <stdio.h>4#include <unistd.h>5#include <sys/types.h>6#include <sys/stat.h>7#include <fcntl.h>8 9int fds[2];10 11void *Thread1(void *x) {12 char buf;13 read(fds[0], &buf, 1);14 close(fds[0]);15 return 0;16}17 18void *Thread2(void *x) {19 close(fds[1]);20 return 0;21}22 23int main() {24 fds[0] = open("/dev/random", O_RDONLY);25 fds[1] = dup2(fds[0], 100);26 pthread_t t[2];27 pthread_create(&t[0], NULL, Thread1, NULL);28 pthread_create(&t[1], NULL, Thread2, NULL);29 pthread_join(t[0], NULL);30 pthread_join(t[1], NULL);31 fprintf(stderr, "OK\n");32}33 34// CHECK-NOT: WARNING: ThreadSanitizer: data race35