+ kernel::actor::ActorImpl* actor = kernel::EngineImpl::get_instance()->get_actor_by_pid(message->aid_);
+ xbt_assert(actor != nullptr, "Invalid pid %ld", message->aid_);
+
+ // The client may send some messages to the server while processing the transition
+ actor->simcall_handle(message->times_considered_);
+ // Say the server that the transition is over and that it should proceed
+ xbt_assert(channel_.send(MessageType::WAITING) == 0, "Could not send MESSAGE_WAITING to model-checker");
+
+ // Finish the RPC from the server: return a serialized observer, to build a Transition on Checker side
+ s_mc_message_simcall_execute_answer_t answer;
+ memset(&answer, 0, sizeof(answer));
+ answer.type = MessageType::SIMCALL_EXECUTE_ANSWER;
+ std::stringstream stream;
+ if (actor->simcall_.observer_ != nullptr) {
+ actor->simcall_.observer_->serialize(stream);
+ } else {
+ stream << (short)mc::Transition::Type::UNKNOWN;
+ }
+ std::string str = stream.str();
+ xbt_assert(str.size() + 1 <= answer.buffer.size(),
+ "The serialized simcall is too large for the buffer. Please fix the code.");
+ strncpy(answer.buffer.data(), str.c_str(), answer.buffer.size() - 1);
+ answer.buffer.back() = '\0';
+
+ XBT_DEBUG("send SIMCALL_EXECUTE_ANSWER(%s) ~> '%s'", actor->get_cname(), str.c_str());
+ xbt_assert(channel_.send(answer) == 0, "Could not send response");