1*bcaeed49SFangrui Song // RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t 2>&1 | FileCheck %s
2*bcaeed49SFangrui Song #include "test.h"
3*bcaeed49SFangrui Song #include <sys/types.h>
4*bcaeed49SFangrui Song #include <sys/stat.h>
5*bcaeed49SFangrui Song #include <fcntl.h>
6*bcaeed49SFangrui Song
7*bcaeed49SFangrui Song // dup2(oldfd, newfd) races with close(newfd).
8*bcaeed49SFangrui Song
9*bcaeed49SFangrui Song int fd;
10*bcaeed49SFangrui Song
Thread(void * x)11*bcaeed49SFangrui Song void *Thread(void *x) {
12*bcaeed49SFangrui Song barrier_wait(&barrier);
13*bcaeed49SFangrui Song if (close(fd) == -1)
14*bcaeed49SFangrui Song exit(printf("close failed\n"));
15*bcaeed49SFangrui Song return 0;
16*bcaeed49SFangrui Song }
17*bcaeed49SFangrui Song
main()18*bcaeed49SFangrui Song int main() {
19*bcaeed49SFangrui Song barrier_init(&barrier, 2);
20*bcaeed49SFangrui Song fd = open("/dev/random", O_RDONLY);
21*bcaeed49SFangrui Song int fd2 = open("/dev/random", O_RDONLY);
22*bcaeed49SFangrui Song if (fd == -1 || fd2 == -1)
23*bcaeed49SFangrui Song exit(printf("open failed\n"));
24*bcaeed49SFangrui Song pthread_t th;
25*bcaeed49SFangrui Song pthread_create(&th, 0, Thread, 0);
26*bcaeed49SFangrui Song if (dup2(fd2, fd) == -1)
27*bcaeed49SFangrui Song exit(printf("dup2 failed\n"));
28*bcaeed49SFangrui Song barrier_wait(&barrier);
29*bcaeed49SFangrui Song pthread_join(th, 0);
30*bcaeed49SFangrui Song fprintf(stderr, "DONE\n");
31*bcaeed49SFangrui Song }
32*bcaeed49SFangrui Song
33*bcaeed49SFangrui Song // CHECK: WARNING: ThreadSanitizer: data race
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