llvm-project

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//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// Forced unwinding causes std::terminate when going through noexcept.
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// UNSUPPORTED: no-exceptions, c++03
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// VE only supports SjLj and doesn't provide _Unwind_ForcedUnwind.
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// UNSUPPORTED: target={{ve-.*}}
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// These tests fail on previously released dylibs, investigation needed.
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// XFAIL: stdlib=system && target={{.+}}-apple-macosx10.{{9|10|11|12|13|14|15}}
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// XFAIL: stdlib=system && target={{.+}}-apple-macosx{{11.0|12.0}}
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#include <exception>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <unwind.h>
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#include <tuple>
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#include <__cxxabi_config.h>
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template <typename T>
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struct Stop;
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template <typename R, typename... Args>
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struct Stop<R (*)(Args...)> {
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  // The third argument of _Unwind_Stop_Fn is uint64_t in Itanium C++ ABI/LLVM
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  // libunwind while _Unwind_Exception_Class in libgcc.
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  typedef typename std::tuple_element<2, std::tuple<Args...>>::type type;
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  static _Unwind_Reason_Code stop(int, _Unwind_Action actions, type,
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                                  struct _Unwind_Exception*,
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                                  struct _Unwind_Context*, void*) {
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    if (actions & _UA_END_OF_STACK)
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      abort();
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    return _URC_NO_REASON;
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  }
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};
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static void forced_unwind() {
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  _Unwind_Exception* exc = new _Unwind_Exception;
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  memset(&exc->exception_class, 0, sizeof(exc->exception_class));
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  exc->exception_cleanup = 0;
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  _Unwind_ForcedUnwind(exc, Stop<_Unwind_Stop_Fn>::stop, 0);
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  abort();
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}
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static void test() noexcept { forced_unwind(); }
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static void terminate() { exit(0); }
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int main(int, char**) {
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  std::set_terminate(terminate);
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  try {
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    test();
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  } catch (...) {
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  }
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  abort();
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}
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