SC_FAULT_ADDR(&sc), SC_IP(&sc));
FAULT_ADDRESS(fi), SC_IP(&sc));
static void tracer_segv(int sig, struct sigcontext sc){	printf("Tracing thread segfault at address 0x%lx, ip 0x%lx\n",	       SC_FAULT_ADDR(&sc), SC_IP(&sc));	while(1)		pause();}