1 | // RUN: %clangxx_tsan -O1 %s -o %t && %run %t |
---|---|
2 | |
3 | // Data race randomly triggered. |
4 | // UNSUPPORTED: target={{.*netbsd.*}} |
5 | |
6 | // Make sure TSan doesn't deadlock on a file stream lock at program shutdown. |
7 | // See https://github.com/google/sanitizers/issues/454 |
8 | #ifdef __FreeBSD__ |
9 | #define _WITH_GETLINE // to declare getline() |
10 | #endif |
11 | |
12 | #include <pthread.h> |
13 | #include <stdio.h> |
14 | #include <unistd.h> |
15 | |
16 | void *thread(void *unused) { |
17 | char *line = NULL; |
18 | size_t size; |
19 | int fd[2]; |
20 | pipe(pipedes: fd); |
21 | // Forge a non-standard stream to make sure it's not closed. |
22 | FILE *stream = fdopen(fd: fd[0], modes: "r"); |
23 | while (1) { |
24 | volatile int res = getline(lineptr: &line, n: &size, stream: stream); |
25 | (void)res; |
26 | } |
27 | return NULL; |
28 | } |
29 | |
30 | int main() { |
31 | pthread_t t; |
32 | pthread_attr_t a; |
33 | pthread_attr_init(attr: &a); |
34 | pthread_attr_setdetachstate(attr: &a, PTHREAD_CREATE_DETACHED); |
35 | pthread_create(newthread: &t, attr: &a, start_routine: thread, NULL); |
36 | pthread_attr_destroy(attr: &a); |
37 | fprintf(stderr, format: "DONE\n"); |
38 | return 0; |
39 | // ThreadSanitizer used to hang here because of a deadlock on a file stream. |
40 | } |
41 | |
42 | // CHECK: DONE |
43 |