I'm investigating the LLVM's libunwind library. I'd like to write or to look at a simple example which directly calls the
_Unwind_Reason _Unwind_RaiseException( struct _Unwind_Exception *exception_object );
function. Does any one know whether there are any examples that use this function or can write a simple example oneself?
A bit late, but I'd guess you would have appreciated a link to https://monoinfinito.wordpress.com/series/exception-handling-in-c/ that also includes an implementation of __cxa_throw()
using said function, quoted here verbatim:
void __cxa_throw(void* thrown_exception, struct type_info *tinfo, void (*dest)(void*))
{
printf("__cxa_throw called\n");
__cxa_exception *header = ((__cxa_exception *) thrown_exception - 1);
_Unwind_RaiseException(&header->unwindHeader);
// __cxa_throw never returns
printf("no one handled __cxa_throw, terminate!\n");
exit(0);
}
The function itself is AFAICT independent of the compiler/C++ runtime library since it is specified in the language standard.
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