-
-/* 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)
-{
- /* 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(static_cast<simgrid::kernel::activity::CommImpl*>(simcall_comm_wait__getraw__comm(&actor->simcall)));
- simgrid::mc::Remote<simgrid::kernel::activity::CommImpl> temp_act;
- mc_model_checker->process().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->process().read(
- remote(simcall_comm_waitany__get__comms(req) + state->transition_.argument_));
- mc_model_checker->process().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->process().read(
- remote(simcall_comm_testany__get__comms(req) + state->transition_.argument_));
- mc_model_checker->process().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->process().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->process().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->process().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;
-}