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 // Forced unwinding causes std::terminate when going through noexcept.
10 
11 // UNSUPPORTED: no-exceptions, c++03
12 
13 // These tests fail on previously released dylibs, investigation needed.
14 // XFAIL: use_system_cxx_lib && x86_64-apple-macosx10.15
15 // XFAIL: use_system_cxx_lib && x86_64-apple-macosx10.14
16 // XFAIL: use_system_cxx_lib && x86_64-apple-macosx10.13
17 // XFAIL: use_system_cxx_lib && x86_64-apple-macosx10.12
18 // XFAIL: use_system_cxx_lib && x86_64-apple-macosx10.11
19 // XFAIL: use_system_cxx_lib && x86_64-apple-macosx10.10
20 // XFAIL: use_system_cxx_lib && x86_64-apple-macosx10.9
21 
22 #include <exception>
23 #include <stdlib.h>
24 #include <stdio.h>
25 #include <string.h>
26 #include <unwind.h>
27 #include <tuple>
28 #include <__cxxabi_config.h>
29 
30 #if defined(_LIBCXXABI_ARM_EHABI)
31 int main(int, char**) {
32   return 0;
33 }
34 #else
35 template <typename T>
36 struct Stop;
37 
38 template <typename R, typename... Args>
39 struct Stop<R (*)(Args...)> {
40   // The third argument of _Unwind_Stop_Fn is uint64_t in Itanium C++ ABI/LLVM
41   // libunwind while _Unwind_Exception_Class in libgcc.
42   typedef typename std::tuple_element<2, std::tuple<Args...>>::type type;
43 
44   static _Unwind_Reason_Code stop(int, _Unwind_Action actions, type,
45                                   struct _Unwind_Exception*,
46                                   struct _Unwind_Context*, void*) {
47     if (actions & _UA_END_OF_STACK)
48       abort();
49     return _URC_NO_REASON;
50   }
51 };
52 
53 static void forced_unwind() {
54   _Unwind_Exception* exc = new _Unwind_Exception;
55   exc->exception_class = 0;
56   exc->exception_cleanup = 0;
57   _Unwind_ForcedUnwind(exc, Stop<_Unwind_Stop_Fn>::stop, 0);
58   abort();
59 }
60 
61 static void test() noexcept { forced_unwind(); }
62 
63 static void terminate() { exit(0); }
64 
65 int main(int, char**) {
66   std::set_terminate(terminate);
67   try {
68     test();
69   } catch (...) {
70   }
71   abort();
72 }
73 #endif
74