1*7c3d14c8STreehugger Robot // RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t 2>&1 | FileCheck %s
2*7c3d14c8STreehugger Robot #include "test.h"
3*7c3d14c8STreehugger Robot #include <sys/types.h>
4*7c3d14c8STreehugger Robot #include <sys/stat.h>
5*7c3d14c8STreehugger Robot #include <fcntl.h>
6*7c3d14c8STreehugger Robot
7*7c3d14c8STreehugger Robot // dup2(oldfd, newfd) races with close(newfd).
8*7c3d14c8STreehugger Robot
9*7c3d14c8STreehugger Robot int fd;
10*7c3d14c8STreehugger Robot
Thread(void * x)11*7c3d14c8STreehugger Robot void *Thread(void *x) {
12*7c3d14c8STreehugger Robot barrier_wait(&barrier);
13*7c3d14c8STreehugger Robot if (close(fd) == -1)
14*7c3d14c8STreehugger Robot exit(printf("close failed\n"));
15*7c3d14c8STreehugger Robot return 0;
16*7c3d14c8STreehugger Robot }
17*7c3d14c8STreehugger Robot
main()18*7c3d14c8STreehugger Robot int main() {
19*7c3d14c8STreehugger Robot barrier_init(&barrier, 2);
20*7c3d14c8STreehugger Robot fd = open("/dev/random", O_RDONLY);
21*7c3d14c8STreehugger Robot int fd2 = open("/dev/random", O_RDONLY);
22*7c3d14c8STreehugger Robot if (fd == -1 || fd2 == -1)
23*7c3d14c8STreehugger Robot exit(printf("open failed\n"));
24*7c3d14c8STreehugger Robot pthread_t th;
25*7c3d14c8STreehugger Robot pthread_create(&th, 0, Thread, 0);
26*7c3d14c8STreehugger Robot if (dup2(fd2, fd) == -1)
27*7c3d14c8STreehugger Robot exit(printf("dup2 failed\n"));
28*7c3d14c8STreehugger Robot barrier_wait(&barrier);
29*7c3d14c8STreehugger Robot pthread_join(th, 0);
30*7c3d14c8STreehugger Robot fprintf(stderr, "DONE\n");
31*7c3d14c8STreehugger Robot }
32*7c3d14c8STreehugger Robot
33*7c3d14c8STreehugger Robot // CHECK: WARNING: ThreadSanitizer: data race
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