1 // -*- C++ -*-
2 //===----------------------------------------------------------------------===//
3 //
4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
5 // See https://llvm.org/LICENSE.txt for license information.
6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //
8 //===----------------------------------------------------------------------===//
9 
10 // REQUIRES: linux && target={{aarch64-.+}}
11 
12 // pthread_cancel in case of glibc calls _Unwind_ForcedUnwind from a signal on
13 // the child_thread. This test ensures sigretrun is handled correctly (see:
14 // UnwindCursor<A, R>::setInfoForSigReturn).
15 
16 #include <chrono>
17 #include <condition_variable>
18 #include <pthread.h>
19 #include <unistd.h>
20 
21 using namespace std::chrono_literals;
22 
23 std::condition_variable cv;
24 std::mutex cv_m;
25 bool thread_ready = false;
26 
27 static void* test(void* arg) {
28   (void)arg;
29   thread_ready = true;
30   cv.notify_all();
31 
32   // This must be a pthread cancellation point.
33   while (1)
34     sleep(100);
35 
36   return (void*)1;
37 }
38 
39 int main() {
40   pthread_t child_thread;
41   std::unique_lock<std::mutex> lk(cv_m);
42   pthread_create(&child_thread, 0, test, (void*)0);
43 
44   if (!cv.wait_for(lk, 100ms, [] { return thread_ready; }))
45     return -1;
46 
47   pthread_cancel(child_thread);
48   pthread_join(child_thread, NULL);
49   return 0;
50 }
51