}
}
+
+/* Search an enabled transition for the given process.
+ *
+ * This can be seen as an iterator returning the next transition of the process.
+ *
+ * We only consider the processes that are both
+ * - marked "to be interleaved" in their ActorState (controlled by the checker algorithm).
+ * - which simcall can currently be executed (like a comm where the other partner is already known)
+ * Once we returned the last enabled transition of a process, it is marked done.
+ *
+ * Things can get muddled with the WAITANY and TESTANY simcalls, that are rewritten on the fly to a bunch of WAIT
+ * (resp TEST) transitions using the transition.argument field to remember what was the last returned sub-transition.
+ */
+static inline smx_simcall_t MC_state_choose_request_for_process(simgrid::mc::State* state, smx_actor_t actor)
+{
+ using simgrid::simix::Simcall;
+
+ /* reset the outgoing transition */
+ simgrid::mc::ActorState* procstate = &state->actor_states_[actor->get_pid()];
+ state->transition_.pid_ = -1;
+ state->transition_.argument_ = -1;
+ state->executed_req_.call_ = Simcall::NONE;
+
+ if (not simgrid::mc::actor_is_enabled(actor))
+ return nullptr; // Not executable in the application
+
+ smx_simcall_t req = nullptr;
+ switch (actor->simcall_.call_) {
+ case Simcall::COMM_WAITANY:
+ state->transition_.argument_ = -1;
+ while (procstate->times_considered < simcall_comm_waitany__get__count(&actor->simcall_)) {
+ if (simgrid::mc::request_is_enabled_by_idx(&actor->simcall_, procstate->times_considered)) {
+ state->transition_.argument_ = procstate->times_considered;
+ ++procstate->times_considered;
+ break;
+ }
+ ++procstate->times_considered;
+ }
+
+ if (procstate->times_considered >= simcall_comm_waitany__get__count(&actor->simcall_))
+ procstate->set_done();
+ if (state->transition_.argument_ != -1)
+ req = &actor->simcall_;
+ break;
+
+ case Simcall::COMM_TESTANY: {
+ unsigned start_count = procstate->times_considered;
+ state->transition_.argument_ = -1;
+ while (procstate->times_considered < simcall_comm_testany__get__count(&actor->simcall_)) {
+ if (simgrid::mc::request_is_enabled_by_idx(&actor->simcall_, procstate->times_considered)) {
+ state->transition_.argument_ = procstate->times_considered;
+ ++procstate->times_considered;
+ break;
+ }
+ ++procstate->times_considered;
+ }
+
+ if (procstate->times_considered >= simcall_comm_testany__get__count(&actor->simcall_))
+ procstate->set_done();
+
+ if (state->transition_.argument_ != -1 || start_count == 0)
+ req = &actor->simcall_;
+
+ break;
+ }
+
+ case Simcall::COMM_WAIT: {
+ simgrid::mc::RemotePtr<simgrid::kernel::activity::CommImpl> remote_act =
+ remote(simcall_comm_wait__getraw__comm(&actor->simcall_));
+ simgrid::mc::Remote<simgrid::kernel::activity::CommImpl> temp_act;
+ mc_model_checker->get_remote_simulation().read(temp_act, remote_act);
+ const simgrid::kernel::activity::CommImpl* act = temp_act.get_buffer();
+ if (act->src_actor_.get() && act->dst_actor_.get())
+ state->transition_.argument_ = 0; // OK
+ else if (act->src_actor_.get() == nullptr && act->type_ == simgrid::kernel::activity::CommImpl::Type::READY &&
+ act->detached())
+ state->transition_.argument_ = 0; // OK
+ else
+ state->transition_.argument_ = -1; // timeout
+ procstate->set_done();
+ req = &actor->simcall_;
+ break;
+ }
+
+ case Simcall::MC_RANDOM: {
+ int min_value = simcall_mc_random__get__min(&actor->simcall_);
+ state->transition_.argument_ = procstate->times_considered + min_value;
+ procstate->times_considered++;
+ if (state->transition_.argument_ == simcall_mc_random__get__max(&actor->simcall_))
+ procstate->set_done();
+ req = &actor->simcall_;
+ break;
+ }
+
+ default:
+ procstate->set_done();
+ state->transition_.argument_ = 0;
+ req = &actor->simcall_;
+ break;
+ }
+ if (not req)
+ return nullptr;
+
+ state->transition_.pid_ = actor->get_pid();
+ state->executed_req_ = *req;
+ // Fetch the data of the request and translate it:
+ state->internal_req_ = *req;
+
+ /* The waitany and testany request are transformed into a wait or test request over the corresponding communication
+ * action so it can be treated later by the dependence function. */
+ switch (req->call_) {
+ case Simcall::COMM_WAITANY: {
+ state->internal_req_.call_ = Simcall::COMM_WAIT;
+ simgrid::kernel::activity::CommImpl* remote_comm;
+ remote_comm = mc_model_checker->get_remote_simulation().read(
+ remote(simcall_comm_waitany__get__comms(req) + state->transition_.argument_));
+ mc_model_checker->get_remote_simulation().read(state->internal_comm_, remote(remote_comm));
+ simcall_comm_wait__set__comm(&state->internal_req_, state->internal_comm_.get_buffer());
+ simcall_comm_wait__set__timeout(&state->internal_req_, 0);
+ break;
+ }
+
+ case Simcall::COMM_TESTANY:
+ state->internal_req_.call_ = Simcall::COMM_TEST;
+
+ if (state->transition_.argument_ > 0) {
+ simgrid::kernel::activity::CommImpl* remote_comm = mc_model_checker->get_remote_simulation().read(
+ remote(simcall_comm_testany__get__comms(req) + state->transition_.argument_));
+ mc_model_checker->get_remote_simulation().read(state->internal_comm_, remote(remote_comm));
+ }
+
+ simcall_comm_test__set__comm(&state->internal_req_, state->internal_comm_.get_buffer());
+ simcall_comm_test__set__result(&state->internal_req_, state->transition_.argument_);
+ break;
+
+ case Simcall::COMM_WAIT:
+ mc_model_checker->get_remote_simulation().read_bytes(&state->internal_comm_, sizeof(state->internal_comm_),
+ remote(simcall_comm_wait__getraw__comm(req)));
+ simcall_comm_wait__set__comm(&state->executed_req_, state->internal_comm_.get_buffer());
+ simcall_comm_wait__set__comm(&state->internal_req_, state->internal_comm_.get_buffer());
+ break;
+
+ case Simcall::COMM_TEST:
+ mc_model_checker->get_remote_simulation().read_bytes(&state->internal_comm_, sizeof(state->internal_comm_),
+ remote(simcall_comm_test__getraw__comm(req)));
+ simcall_comm_test__set__comm(&state->executed_req_, state->internal_comm_.get_buffer());
+ simcall_comm_test__set__comm(&state->internal_req_, state->internal_comm_.get_buffer());
+ break;
+
+ default:
+ /* No translation needed */
+ break;
+ }
+
+ return req;
+}
+
+smx_simcall_t MC_state_choose_request(simgrid::mc::State* state)
+{
+ for (auto& actor : mc_model_checker->get_remote_simulation().actors()) {
+ /* Only consider the actors that were marked as interleaving by the checker algorithm */
+ if (not state->actor_states_[actor.copy.get_buffer()->get_pid()].is_todo())
+ continue;
+
+ smx_simcall_t res = MC_state_choose_request_for_process(state, actor.copy.get_buffer());
+ if (res)
+ return res;
+ }
+ return nullptr;
+}
