Provide a fallback __cxa_thread_atexit() implementation. Patch from Tavian Barnes

git-svn-id: https://llvm.org/svn/llvm-project/libcxxabi/trunk@283988 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 56 insertions, 0 deletions

diff --git a/test/thread_local_destruction_order.pass.cpp b/test/thread_local_destruction_order.pass.cpp
new file mode 100644
index 0000000..3c320ea
--- /dev/null
+++ b/test/thread_local_destruction_order.pass.cpp
@@ -0,0 +1,56 @@
+//===-------------- thread_local_destruction_order.pass.cpp ---------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++98, c++03
+
+#include <cassert>
+#include <thread>
+
+int seq = 0;
+
+class OrderChecker {
+public:
+  explicit OrderChecker(int n) : n_{n} { }
+
+  ~OrderChecker() {
+    assert(seq++ == n_);
+  }
+
+private:
+  int n_;
+};
+
+template <int ID>
+class CreatesThreadLocalInDestructor {
+public:
+  ~CreatesThreadLocalInDestructor() {
+    thread_local OrderChecker checker{ID};
+  }
+};
+
+OrderChecker global{7};
+
+void thread_fn() {
+  static OrderChecker fn_static{5};
+  thread_local CreatesThreadLocalInDestructor<2> creates_tl2;
+  thread_local OrderChecker fn_thread_local{1};
+  thread_local CreatesThreadLocalInDestructor<0> creates_tl0;
+}
+
+int main() {
+  static OrderChecker fn_static{6};
+
+  std::thread{thread_fn}.join();
+  assert(seq == 3);
+
+  thread_local OrderChecker fn_thread_local{4};
+  thread_local CreatesThreadLocalInDestructor<3> creates_tl;
+
+  return 0;
+}