libcxxabi/test/thread_local_destruction_order.pass.cpp

   1 //===----------------------------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 // UNSUPPORTED: c++03
  10 // UNSUPPORTED: no-threads
  11
  12 // XFAIL: LIBCXX-FREEBSD-FIXME
  13
  14 // TODO: This test does start working with newer updates of the mingw-w64
  15 // toolchain, when it includes the following commit:
  16 // https://github.com/mingw-w64/mingw-w64/commit/71eddccd746c56d9cde28bb5620d027d49259de9
  17 // Thus, remove this UNSUPPORTED marking after the next update of the CI
  18 // toolchain.
  19 // UNSUPPORTED: target={{.*-windows-gnu}}
  20
  21 #include <cassert>
  22 #include <thread>
  23
  24 #include "make_test_thread.h"
  25
  26 int seq = 0;
  27
  28 class OrderChecker {
  29 public:
  30   explicit OrderChecker(int n) : n_{n} { }
  31
  32   ~OrderChecker() {
  33     assert(seq++ == n_);
  34   }
  35
  36 private:
  37   int n_;
  38 };
  39
  40 template <int ID>
  41 class CreatesThreadLocalInDestructor {
  42 public:
  43   ~CreatesThreadLocalInDestructor() {
  44     thread_local OrderChecker checker{ID};
  45   }
  46 };
  47
  48 OrderChecker global{7};
  49
  50 void thread_fn() {
  51   static OrderChecker fn_static{5};
  52   thread_local CreatesThreadLocalInDestructor<2> creates_tl2;
  53   thread_local OrderChecker fn_thread_local{1};
  54   thread_local CreatesThreadLocalInDestructor<0> creates_tl0;
  55 }
  56
  57 int main(int, char**) {
  58   static OrderChecker fn_static{6};
  59
  60   support::make_test_thread(thread_fn).join();
  61   assert(seq == 3);
  62
  63   thread_local OrderChecker fn_thread_local{4};
  64   thread_local CreatesThreadLocalInDestructor<3> creates_tl;
  65
  66   return 0;
  67 }