#define UNW_LOCAL_ONLY
#include <libunwind.h>

unsigned long long traverse_callstack (void)
{
	unw_cursor_t cursor;
	unw_context_t uc;

	if (unw_getcontext(&uc) < 0)
		return 0;

	if (unw_init_local(&cursor, &uc))
		return 0;

	while (1)
		if (unw_step (&cursor) <= 0)
			return 1;
	return 0;
}

int main(int argc, char **argv)
{
	traverse_callstack ();
}