libcxxabi/test/cxa_bad_cast.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
  11 #include <cxxabi.h>
  12 #include <cassert>
  13 #include <stdlib.h>
  14 #include <exception>
  15 #include <typeinfo>
  16
  17 #include "test_macros.h"
  18
  19 class Base {
  20   virtual void foo() {};
  21 };
  22
  23 class Derived : public Base {};
  24
  25 Derived &test_bad_cast(Base& b) {
  26   return dynamic_cast<Derived&>(b);
  27 }
  28
  29 Base gB;
  30
  31 void my_terminate() { exit(0); }
  32
  33 int main ()
  34 {
  35     // swap-out the terminate handler
  36     void (*default_handler)() = std::get_terminate();
  37     std::set_terminate(my_terminate);
  38
  39 #ifndef TEST_HAS_NO_EXCEPTIONS
  40     try {
  41 #endif
  42         Derived &d = test_bad_cast(gB);
  43         assert(false);
  44         ((void)d);
  45 #ifndef TEST_HAS_NO_EXCEPTIONS
  46     } catch (std::bad_cast const&) {
  47         // success
  48         return 0;
  49     } catch (...) {
  50         assert(false);
  51     }
  52 #endif
  53
  54     // failure, restore the default terminate handler and fire
  55     std::set_terminate(default_handler);
  56     std::terminate();
  57 }