clang/test/CodeGenCXX/ubsan-coroutines.cpp

   1 // This test merely verifies that emitting the object file does not cause a
   2 // crash when the LLVM coroutines passes are run.
   3 // RUN: %clang_cc1 -emit-obj -std=c++2a -fsanitize=null %s -o %t.o
   4
   5 namespace std {
   6 template <typename R, typename... T> struct coroutine_traits {
   7   using promise_type = typename R::promise_type;
   8 };
   9
  10 template <class Promise = void> struct coroutine_handle;
  11 template <> struct coroutine_handle<void> {
  12   static coroutine_handle from_address(void *) noexcept;
  13   coroutine_handle() = default;
  14   template <class PromiseType>
  15   coroutine_handle(coroutine_handle<PromiseType>) noexcept;
  16 };
  17 template <class Promise> struct coroutine_handle : coroutine_handle<void> {
  18   coroutine_handle() = default;
  19   static coroutine_handle from_address(void *) noexcept;
  20 };
  21 } // namespace std
  22
  23 struct suspend_always {
  24   bool await_ready() noexcept;
  25   void await_suspend(std::coroutine_handle<>) noexcept;
  26   void await_resume() noexcept;
  27 };
  28
  29 struct task {
  30   struct promise_type {
  31     task get_return_object() { return task(); }
  32     suspend_always initial_suspend() { return {}; }
  33     suspend_always final_suspend() noexcept { return {}; }
  34     void return_void() {}
  35     void unhandled_exception() {}
  36   };
  37 };
  38
  39 struct awaitable {
  40   task await() { (void)co_await *this; }
  41   bool await_ready() { return false; }
  42   bool await_suspend(std::coroutine_handle<> awaiter) { return false; }
  43   bool await_resume() { return false; }
  44 };
  45
  46 int main() {
  47   awaitable a;
  48   a.await();
  49 }