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 // Android/Bionic does not support pthread_cancel.
17 #ifdef __BIONIC__
main()18 int main() {
19   return 0;
20 }
21 #else
22 
23 #include <chrono>
24 #include <condition_variable>
25 #include <pthread.h>
26 #include <unistd.h>
27 
28 using namespace std::chrono_literals;
29 
30 std::condition_variable cv;
31 std::mutex cv_m;
32 bool thread_ready = false;
33 
test(void * arg)34 static void* test(void* arg) {
35   (void)arg;
36   thread_ready = true;
37   cv.notify_all();
38 
39   // This must be a pthread cancellation point.
40   while (1)
41     sleep(100);
42 
43   return (void*)1;
44 }
45 
main()46 int main() {
47   pthread_t child_thread;
48   std::unique_lock<std::mutex> lk(cv_m);
49   pthread_create(&child_thread, 0, test, (void*)0);
50 
51   if (!cv.wait_for(lk, 100ms, [] { return thread_ready; }))
52     return -1;
53 
54   pthread_cancel(child_thread);
55   pthread_join(child_thread, NULL);
56   return 0;
57 }
58 #endif
59