libcxxabi/test/forced_unwind2.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 // Forced unwinding causes std::terminate when going through noexcept.
  10
  11 // UNSUPPORTED: no-exceptions, c++03
  12
  13 // VE only supports SjLj and doesn't provide _Unwind_ForcedUnwind.
  14 // UNSUPPORTED: target={{ve-.*}}
  15
  16 // These tests fail on previously released dylibs, investigation needed.
  17 // XFAIL: stdlib=apple-libc++ && target={{.+}}-apple-macosx10.{{9|10|11|12|13|14|15}}
  18 // XFAIL: stdlib=apple-libc++ && target={{.+}}-apple-macosx{{11.0|12.0}}
  19
  20 #include <exception>
  21 #include <stdlib.h>
  22 #include <stdio.h>
  23 #include <string.h>
  24 #include <unwind.h>
  25 #include <tuple>
  26 #include <__cxxabi_config.h>
  27
  28 template <typename T>
  29 struct Stop;
  30
  31 template <typename R, typename... Args>
  32 struct Stop<R (*)(Args...)> {
  33   // The third argument of _Unwind_Stop_Fn is uint64_t in Itanium C++ ABI/LLVM
  34   // libunwind while _Unwind_Exception_Class in libgcc.
  35   typedef typename std::tuple_element<2, std::tuple<Args...>>::type type;
  36
  37   static _Unwind_Reason_Code stop(int, _Unwind_Action actions, type,
  38                                   struct _Unwind_Exception*,
  39                                   struct _Unwind_Context*, void*) {
  40     if (actions & _UA_END_OF_STACK)
  41       abort();
  42     return _URC_NO_REASON;
  43   }
  44 };
  45
  46 static void forced_unwind() {
  47   _Unwind_Exception* exc = new _Unwind_Exception;
  48   memset(&exc->exception_class, 0, sizeof(exc->exception_class));
  49   exc->exception_cleanup = 0;
  50   _Unwind_ForcedUnwind(exc, Stop<_Unwind_Stop_Fn>::stop, 0);
  51   abort();
  52 }
  53
  54 static void test() noexcept { forced_unwind(); }
  55
  56 static void terminate() { exit(0); }
  57
  58 int main(int, char**) {
  59   std::set_terminate(terminate);
  60   try {
  61     test();
  62   } catch (...) {
  63   }
  64   abort();
  65 }