| 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 | |