function print_all_trace_info(point:string) {
	printf("backtrace from %s:\n", pp())
        print_backtrace()
        print("--------\n")
	bt = backtrace()
	printf("the %s stack is %s\n", point, bt)
        print("--------\n")
	print_stack(bt);
        print("--------\n")
}

probe begin {
	print_backtrace()
}

probe end {
	print_backtrace()
}

global flag = 0
probe module("systemtap_test_module2").function("yyy_func3").call {
	print_all_trace_info("call")
	flag ++
}
probe module("systemtap_test_module2").function("yyy_func4").return {
	print_all_trace_info("return")
	flag ++
}
probe timer.profile {
	if (cpu() == 0 && flag == 2 && probemod() != "systemtap_test_module2") {
		print_all_trace_info("profile")
		flag ++
	}
}