34 lines · cpp
1// RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t 2>&1 | FileCheck %s2#include "test.h"3#include <sys/types.h>4#include <sys/stat.h>5#include <fcntl.h>6 7// dup2(oldfd, newfd) races with close(newfd).8 9int fd;10 11void *Thread(void *x) {12 barrier_wait(&barrier);13 if (close(fd) == -1)14 exit(printf("close failed\n"));15 return 0;16}17 18int main() {19 barrier_init(&barrier, 2);20 fd = open("/dev/random", O_RDONLY);21 int fd2 = open("/dev/random", O_RDONLY);22 if (fd == -1 || fd2 == -1)23 exit(printf("open failed\n"));24 pthread_t th;25 pthread_create(&th, 0, Thread, 0);26 if (dup2(fd2, fd) == -1)27 exit(printf("dup2 failed\n"));28 barrier_wait(&barrier);29 pthread_join(th, 0);30 fprintf(stderr, "DONE\n");31}32 33// CHECK: WARNING: ThreadSanitizer: data race34