-/* Copyright (c) 2008-2017. The SimGrid Team. All rights reserved. */
+/* Copyright (c) 2008-2023. The SimGrid Team. All rights reserved. */
/* This program is free software; you can redistribute it and/or modify it
* under the terms of the license (GNU LGPL) which comes with this package. */
-#include <simgrid_config.h>
+#include "src/mc/mc_base.hpp"
+#include "src/kernel/EngineImpl.hpp"
+#include "src/kernel/activity/CommImpl.hpp"
+#include "src/kernel/activity/MutexImpl.hpp"
+#include "src/kernel/actor/SimcallObserver.hpp"
-#include "mc/mc.h"
-#include "src/mc/mc_base.h"
-#include "src/mc/mc_replay.h"
-#include "src/simix/smx_private.h"
-
-#if SIMGRID_HAVE_MC
-#include "src/mc/ModelChecker.hpp"
-
-using simgrid::mc::remote;
-#endif
+#include "src/mc/mc.h"
+#include "src/mc/mc_config.hpp"
+#include "src/mc/mc_replay.hpp"
XBT_LOG_NEW_DEFAULT_CATEGORY(mc, "All MC categories");
+bool simgrid_mc_replay_show_backtraces = false;
-int MC_random(int min, int max)
-{
-#if SIMGRID_HAVE_MC
- xbt_assert(mc_model_checker == nullptr);
-#endif
- /* TODO, if the MC is disabled we do not really need to make a simcall for this :) */
- return simcall_mc_random(min, max);
-}
-
-namespace simgrid {
-namespace mc {
+namespace simgrid::mc {
-void wait_for_requests()
+void execute_actors()
{
-#if SIMGRID_HAVE_MC
- xbt_assert(mc_model_checker == nullptr);
-#endif
-
- smx_actor_t process;
- smx_simcall_t req;
- unsigned int iter;
-
- while (not xbt_dynar_is_empty(simix_global->process_to_run)) {
- SIMIX_process_runall();
- xbt_dynar_foreach(simix_global->process_that_ran, iter, process) {
- req = &process->simcall;
- if (req->call != SIMCALL_NONE && not simgrid::mc::request_is_visible(req))
- SIMIX_simcall_handle(req, 0);
+ auto* engine = kernel::EngineImpl::get_instance();
+
+ XBT_DEBUG("execute_actors: %lu of %zu to run (%s)", engine->get_actor_to_run_count(), engine->get_actor_count(),
+ (MC_record_replay_is_active() ? "replay active" : "no replay"));
+ while (engine->has_actors_to_run()) {
+ engine->run_all_actors();
+ for (auto const& actor : engine->get_actors_that_ran()) {
+ const kernel::actor::Simcall* req = &actor->simcall_;
+ if (req->call_ != kernel::actor::Simcall::Type::NONE && not simgrid::mc::request_is_visible(req))
+ actor->simcall_handle(0);
}
}
-#if SIMGRID_HAVE_MC
- xbt_dynar_reset(simix_global->actors_vector);
- for (std::pair<aid_t, smx_actor_t> kv : simix_global->process_list) {
- xbt_dynar_push_as(simix_global->actors_vector, smx_actor_t, kv.second);
- }
-#endif
}
-
-bool request_is_visible(smx_simcall_t req)
+/** @brief returns if there this transition can proceed in a finite amount of time
+ *
+ * It is used in the model-checker to not get into self-deadlock where it would execute a never ending transition.
+ *
+ * Only WAIT operations (on comm, on mutex, etc) can ever return false because they could lock the MC exploration.
+ * Wait operations are OK and return true in only two situations:
+ * - if the wait will succeed immediately (if both peer of the comm are there already or if the mutex is available)
+ * - if a timeout is provided, because we can fire the timeout if the transition is not ready without blocking in this
+ * transition for ever.
+ * This is controlled in the is_enabled() method of the corresponding observers.
+ */
+bool actor_is_enabled(kernel::actor::ActorImpl* actor)
{
- return req->call == SIMCALL_COMM_ISEND
- || req->call == SIMCALL_COMM_IRECV
- || req->call == SIMCALL_COMM_WAIT
- || req->call == SIMCALL_COMM_WAITANY
- || req->call == SIMCALL_COMM_TEST
- || req->call == SIMCALL_COMM_TESTANY
- || req->call == SIMCALL_MC_RANDOM
- || req->call == SIMCALL_MUTEX_LOCK
- || req->call == SIMCALL_MUTEX_TRYLOCK
- ;
-}
+ xbt_assert(get_model_checking_mode() != ModelCheckingMode::CHECKER_SIDE,
+ "This should be called from the client side");
-}
-}
+ // Now, we are in the client app, no need for remote memory reading.
+ kernel::actor::Simcall* req = &actor->simcall_;
-static int prng_random(int min, int max)
-{
- unsigned long output_size = ((unsigned long) max - (unsigned long) min) + 1;
- unsigned long input_size = (unsigned long) RAND_MAX + 1;
- unsigned long reject_size = input_size % output_size;
- unsigned long accept_size = input_size - reject_size; // module*accept_size
+ if (req->observer_ != nullptr)
+ return req->observer_->is_enabled();
- // Use rejection in order to avoid skew
- unsigned long x;
- do {
-#ifndef _WIN32
- x = (unsigned long) random();
-#else
- x = (unsigned long) rand();
-#endif
- } while( x >= accept_size );
- return min + (x % output_size);
+ if (req->call_ == kernel::actor::Simcall::Type::NONE)
+ return false;
+ else
+ /* The rest of the requests are always enabled */
+ return true;
}
-int simcall_HANDLER_mc_random(smx_simcall_t simcall, int min, int max)
+/* This is the list of requests that are visible from the checker algorithm.
+ * Any other requests are handled right away on the application side.
+ */
+bool request_is_visible(const kernel::actor::Simcall* req)
{
- if (not MC_is_active() && not MC_record_path)
- return prng_random(min, max);
- return simcall->mc_value;
+ xbt_assert(get_model_checking_mode() != ModelCheckingMode::CHECKER_SIDE,
+ "This should be called from the client side");
+
+ if (req->observer_ == nullptr)
+ return false;
+ return req->observer_->is_visible();
}
+
+} // namespace simgrid::mc