| // checking for type_info dtor |
| |
| #include "config.h" |
| |
| |
| #ifndef _RWSTD_NO_HONOR_STD |
| # ifdef _RWSTD_NO_STD_TERMINATE |
| |
| namespace std { |
| |
| void terminate () |
| { |
| static int *ip; |
| |
| *ip++ = 0; // force a SIGSEGV |
| terminate (); // recurse infinitely |
| } |
| |
| } |
| |
| # endif // _RWSTD_NO_STD_TERMINATE |
| #endif // _RWSTD_NO_HONOR_STD |
| |
| |
| #ifndef _RWSTD_NO_STD_TYPE_INFO |
| # define NAMESPACE(name) namespace name |
| #else |
| # ifndef _RWSTD_NO_GLOBAL_TYPE_INFO |
| # define NAMESPACE(ignore) extern "C++" |
| # define std /* empty */ |
| # else |
| # ifndef _RWSTD_NO_RUNTIME_IN_STD |
| # define NAMESPACE(name) namespace name |
| # else |
| # define NAMESPACE(ignore) extern "C++" |
| # define std /* empty */ |
| # endif // _RWSTD_NO_RUNTIME_IN_STD |
| # endif // _RWSTD_NO_GLOBAL_TYPE_INFO |
| #endif // _RWSTD_NO_STD_TYPE_INFO |
| |
| |
| NAMESPACE (std) { |
| |
| |
| #if defined (__EDG__) || defined (__sgi) |
| // let edg (or some of its derivatives) know about this fake type_info |
| # if !defined (__GNUG__) && !defined (__INTEL_COMPILER) |
| # pragma define_type_info |
| # endif |
| #endif // __EDG__ |
| |
| |
| struct type_info |
| { |
| virtual ~type_info (); |
| }; |
| |
| |
| } // namespace std |
| |
| |
| struct B0: virtual std::type_info { }; |
| struct B1: virtual std::type_info { }; |
| |
| struct Derived: B0, B1 |
| { |
| virtual ~Derived (); |
| }; |
| |
| |
| int dtor; |
| |
| int main (int argc, char *argv[]) |
| { |
| // avoid executing the body of main unless explicitly requested |
| // by specifying at least one command line argument (this foils |
| // aggressive optimizers from eliminating the code) |
| (void)&argv; |
| if (argc < 2) |
| return 0; |
| |
| // try to prevent the compiler from optimizing the dtor call away |
| std::type_info *ptr; |
| |
| if (1 < argc) |
| ptr = (std::type_info*)argv[2]; |
| else |
| ptr = (Derived*)argv[1]; |
| |
| // this will most like crash if evaluated but under normal |
| // conditions the function should never reach this far |
| delete ptr; |
| |
| return !(1 < argc ? 1 == dtor : 0 == dtor); |
| } |
| |
| |
| Derived::~Derived () { ++dtor; } |