| 1 | // RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s |
| 2 | #include "test.h" |
| 3 | #include <sys/types.h> |
| 4 | #include <sys/stat.h> |
| 5 | #include <fcntl.h> |
| 6 | |
| 7 | int fd; |
| 8 | char buf; |
| 9 | |
| 10 | void *Thread1(void *x) { |
| 11 | buf = 1; |
| 12 | barrier_wait(barrier: &barrier); |
| 13 | return NULL; |
| 14 | } |
| 15 | |
| 16 | void *Thread2(void *x) { |
| 17 | write(fd: fd, buf: &buf, n: 1); |
| 18 | return NULL; |
| 19 | } |
| 20 | |
| 21 | int main() { |
| 22 | barrier_init(barrier: &barrier, count: 2); |
| 23 | fd = open(file: "/dev/null" , O_WRONLY); |
| 24 | if (fd < 0) return 1; |
| 25 | pthread_t t[2]; |
| 26 | pthread_create(newthread: &t[0], NULL, start_routine: Thread1, NULL); |
| 27 | barrier_wait(barrier: &barrier); |
| 28 | pthread_create(newthread: &t[1], NULL, start_routine: Thread2, NULL); |
| 29 | pthread_join(th: t[0], NULL); |
| 30 | pthread_join(th: t[1], NULL); |
| 31 | close(fd: fd); |
| 32 | } |
| 33 | |
| 34 | // CHECK: WARNING: ThreadSanitizer: data race |
| 35 | // CHECK: Read of size 1 |
| 36 | // CHECK: #0 write |
| 37 | // CHECK: Previous write of size 1 |
| 38 | // CHECK: #0 Thread1 |
| 39 | |