src/mc/api/State.cpp

   1 /* Copyright (c) 2008-2022. The SimGrid Team. All rights reserved.          */
   2
   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. */
   5
   6 #include "src/mc/api/State.hpp"
   7 #include "src/mc/Session.hpp"
   8 #include "src/mc/api.hpp"
   9 #include "src/mc/mc_config.hpp"
  10
  11 #include <boost/range/algorithm.hpp>
  12
  13 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_state, mc, "Logging specific to MC states");
  14
  15 using simgrid::mc::remote;
  16 using api = simgrid::mc::Api;
  17
  18 namespace simgrid {
  19 namespace mc {
  20
  21 long State::expended_states_ = 0;
  22
  23 State::State() : num_(++expended_states_)
  24 {
  25   const unsigned long maxpid = api::get().get_maxpid();
  26   actor_states_.resize(maxpid);
  27   transition_.reset(new Transition());
  28   /* Stateful model checking */
  29   if ((_sg_mc_checkpoint > 0 && (num_ % _sg_mc_checkpoint == 0)) || _sg_mc_termination) {
  30     auto snapshot_ptr = api::get().take_snapshot(num_);
  31     system_state_     = std::shared_ptr<simgrid::mc::Snapshot>(snapshot_ptr);
  32     if (_sg_mc_comms_determinism || _sg_mc_send_determinism) {
  33       copy_incomplete_comm_pattern();
  34       copy_index_comm_pattern();
  35     }
  36   }
  37 }
  38
  39 std::size_t State::count_todo() const
  40 {
  41   return boost::range::count_if(this->actor_states_, [](simgrid::mc::ActorState const& a) { return a.is_todo(); });
  42 }
  43
  44 Transition* State::get_transition() const
  45 {
  46   return transition_.get();
  47 }
  48
  49 int State::next_transition() const
  50 {
  51   std::vector<ActorInformation>& actors = mc_model_checker->get_remote_process().actors();
  52   XBT_DEBUG("Search for an actor to run. %zu actors to consider", actors.size());
  53   for (unsigned int i = 0; i < actors.size(); i++) {
  54     aid_t aid                     = actors[i].copy.get_buffer()->get_pid();
  55     const ActorState* actor_state = &actor_states_[aid];
  56
  57     /* Only consider actors (1) marked as interleaving by the checker and (2) currently enabled in the application*/
  58     if (not actor_state->is_todo() || not simgrid::mc::session_singleton->actor_is_enabled(aid))
  59       continue;
  60
  61     return i;
  62   }
  63   return -1;
  64 }
  65 Transition* State::execute_next(int next)
  66 {
  67   std::vector<ActorInformation>& actors = mc_model_checker->get_remote_process().actors();
  68
  69   kernel::actor::ActorImpl* actor = actors[next].copy.get_buffer();
  70   aid_t aid                       = actor->get_pid();
  71   int times_considered;
  72
  73   simgrid::mc::ActorState* actor_state = &actor_states_[aid];
  74   /* This actor is ready to be executed. Prepare its execution when simcall_handle will be called on it */
  75   if (actor->simcall_.observer_ != nullptr) {
  76     times_considered = actor_state->get_times_considered_and_inc();
  77     if (actor->simcall_.mc_max_consider_ <= actor_state->get_times_considered())
  78       actor_state->set_done();
  79   } else {
  80     times_considered = 0;
  81     actor_state->set_done();
  82   }
  83
  84   transition_->init(aid, times_considered);
  85   executed_req_ = actor->simcall_;
  86
  87   XBT_DEBUG("Let's run actor %ld, going for transition %s", aid, transition_->to_cstring());
  88
  89   Transition::executed_transitions_++;
  90
  91   Transition* res = mc_model_checker->handle_simcall(*transition_, true);
  92   mc_model_checker->wait_for_requests();
  93
  94   return res;
  95 }
  96
  97 void State::copy_incomplete_comm_pattern()
  98 {
  99   incomplete_comm_pattern_.clear();
 100   const unsigned long maxpid = api::get().get_maxpid();
 101   for (unsigned long i = 0; i < maxpid; i++) {
 102     std::vector<simgrid::mc::PatternCommunication> res;
 103     for (auto const& comm : incomplete_communications_pattern[i])
 104       res.push_back(comm->dup());
 105     incomplete_comm_pattern_.push_back(std::move(res));
 106   }
 107 }
 108
 109 void State::copy_index_comm_pattern()
 110 {
 111   communication_indices_.clear();
 112   for (auto const& list_process_comm : initial_communications_pattern)
 113     this->communication_indices_.push_back(list_process_comm.index_comm);
 114 }
 115
 116 } // namespace mc
 117 } // namespace simgrid