1 /* Copyright (c) 2008-2023. The SimGrid Team. All rights reserved. */
3 /* This program is free software; you can redistribute it and/or modify it
4 * under the terms of the license (GNU LGPL) which comes with this package. */
6 #include "src/mc/mc_base.hpp"
7 #include "src/kernel/EngineImpl.hpp"
8 #include "src/kernel/activity/CommImpl.hpp"
9 #include "src/kernel/activity/MutexImpl.hpp"
10 #include "src/kernel/actor/SimcallObserver.hpp"
11 #include "src/mc/mc.h"
12 #include "src/mc/mc_config.hpp"
13 #include "src/mc/mc_replay.hpp"
16 #include "src/mc/ModelChecker.hpp"
17 #include "src/mc/api/RemoteApp.hpp"
18 #include "src/mc/remote/AppSide.hpp"
19 #include "src/mc/sosp/RemoteProcessMemory.hpp"
22 XBT_LOG_NEW_DEFAULT_CATEGORY(mc, "All MC categories");
23 bool simgrid_mc_replay_show_backtraces = false;
25 namespace simgrid::mc {
29 auto* engine = kernel::EngineImpl::get_instance();
31 XBT_DEBUG("execute_actors: %lu of %zu to run (%s)", engine->get_actor_to_run_count(), engine->get_actor_count(),
32 (MC_record_replay_is_active() ? "replay active" : "no replay"));
33 while (engine->has_actors_to_run()) {
34 engine->run_all_actors();
35 for (auto const& actor : engine->get_actors_that_ran()) {
36 const kernel::actor::Simcall* req = &actor->simcall_;
37 if (req->call_ != kernel::actor::Simcall::Type::NONE && not simgrid::mc::request_is_visible(req))
38 actor->simcall_handle(0);
43 /** @brief returns if there this transition can proceed in a finite amount of time
45 * It is used in the model-checker to not get into self-deadlock where it would execute a never ending transition.
47 * Only WAIT operations (on comm, on mutex, etc) can ever return false because they could lock the MC exploration.
48 * Wait operations are OK and return true in only two situations:
49 * - if the wait will succeed immediately (if both peer of the comm are there already or if the mutex is available)
50 * - if a timeout is provided, because we can fire the timeout if the transition is not ready without blocking in this
51 * transition for ever.
52 * This is controlled in the is_enabled() method of the corresponding observers.
54 bool actor_is_enabled(kernel::actor::ActorImpl* actor)
57 xbt_assert(simgrid::mc::model_checking_mode != simgrid::mc::ModelCheckingMode::CHECKER_SIDE,
58 "This should be called from the client side");
61 // Now, we are in the client app, no need for remote memory reading.
62 kernel::actor::Simcall* req = &actor->simcall_;
64 if (req->observer_ != nullptr)
65 return req->observer_->is_enabled();
67 if (req->call_ == kernel::actor::Simcall::Type::NONE)
70 /* The rest of the requests are always enabled */
74 /* This is the list of requests that are visible from the checker algorithm.
75 * Any other requests are handled right away on the application side.
77 bool request_is_visible(const kernel::actor::Simcall* req)
80 xbt_assert(simgrid::mc::model_checking_mode != simgrid::mc::ModelCheckingMode::CHECKER_SIDE,
81 "This should be called from the client side");
83 if (req->observer_ == nullptr)
85 return req->observer_->is_visible();
88 } // namespace simgrid::mc