| 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 |