diff options
Diffstat (limited to 'src/aux.cc')
-rw-r--r-- | src/aux.cc | 27 |
1 files changed, 25 insertions, 2 deletions
@@ -1,18 +1,41 @@ +/** + * aux.cc - Compiler helper functions. + * + * The functions declared in this file are intended to be called only by code + * that is automatically generated by C++ compilers for some common cases. + */ -#include "stdexcept.h" #include <stdlib.h> +#include "stdexcept.h" +/** + * Called to generate a bad cast exception. This function is intended to allow + * compilers to insert code generating this exception without needing to + * duplicate the code for throwing the exception in every call site. + */ extern "C" void __cxa_bad_cast() { throw std::bad_cast(); } +/** + * Called to generate a bad typeid exception. This function is intended to + * allow compilers to insert code generating this exception without needing to + * duplicate the code for throwing the exception in every call site. + */ extern "C" void __cxa_bad_typeid() { throw std::bad_typeid(); } -extern "C" void __cxa_pure_virtual() { +/** + * Compilers may (but are not required to) set any pure-virtual function's + * vtable entry to this function. This makes debugging slightly easier, as + * users can add a breakpoint on this function to tell if they've accidentally + * called a pure-virtual function. + */ +extern "C" void __cxa_pure_virtual() +{ abort(); } |