update

src/bootstrap.c

@@ -139,7 +139,7 @@ int main(int argc, char **argv)
 		fprintf(stderr, "Failed to attach BPF skeleton\n");
 		goto cleanup;
 	}
-
+	puts("Attach ok!");fflush(stdout);
 	/* Set up ring buffer polling */
 	rb = ring_buffer__new(bpf_map__fd(skel->maps.rb), handle_event, NULL, NULL);
 	if (!rb) {