libcxxabi/test/forced_unwind4.pass.cpp

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