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 X; |
8 | |
9 | void *Thread1(void *x) { |
10 | barrier_wait(barrier: &barrier); |
11 | int f = open(file: "/dev/random" , O_RDONLY); |
12 | char buf; |
13 | read(fd: f, buf: &buf, nbytes: 1); |
14 | close(fd: f); |
15 | X = 42; |
16 | return NULL; |
17 | } |
18 | |
19 | void *Thread2(void *x) { |
20 | X = 43; |
21 | write(STDOUT_FILENO, buf: "a" , n: 1); |
22 | barrier_wait(barrier: &barrier); |
23 | return NULL; |
24 | } |
25 | |
26 | int main() { |
27 | barrier_init(barrier: &barrier, count: 2); |
28 | pthread_t t[2]; |
29 | pthread_create(newthread: &t[0], NULL, start_routine: Thread1, NULL); |
30 | pthread_create(newthread: &t[1], NULL, start_routine: Thread2, NULL); |
31 | pthread_join(th: t[0], NULL); |
32 | pthread_join(th: t[1], NULL); |
33 | } |
34 | |
35 | // CHECK: WARNING: ThreadSanitizer: data race |
36 | // CHECK: Write of size 4 |
37 | // CHECK: #0 Thread1 |
38 | // CHECK: Previous write of size 4 |
39 | // CHECK: #0 Thread2 |
40 | |
41 | |
42 | |