1 | // RUN: %clang_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s |
2 | #include "test.h" |
3 | |
4 | void *thread(void *x) { |
5 | barrier_wait(barrier: &barrier); |
6 | *static_cast<int *>(x) = 2; |
7 | return nullptr; |
8 | } |
9 | |
10 | static void race() { |
11 | int data = 0; |
12 | pthread_t t; |
13 | pthread_create(newthread: &t, attr: nullptr, start_routine: thread, arg: &data); |
14 | data = 1; |
15 | barrier_wait(barrier: &barrier); |
16 | pthread_join(th: t, thread_return: nullptr); |
17 | } |
18 | |
19 | struct X { |
20 | __attribute__((noinline)) |
21 | X() { atexit(func: race); } |
22 | } x; |
23 | |
24 | int main() { |
25 | barrier_init(barrier: &barrier, count: 2); |
26 | fprintf(stderr, format: "DONE\n" ); |
27 | } |
28 | |
29 | // CHECK: DONE |
30 | // CHECK: WARNING: ThreadSanitizer: data race |
31 | // CHECK: Write of size 4 |
32 | // CHECK: #0 thread |
33 | // CHECK: Previous write of size 4 |
34 | // CHECK: #0 race |
35 | // CHECK: #1 at_exit_callback_installed_at |
36 | // CHECK: #2 X |
37 | |