src/mc/explo/LivenessChecker.hpp

   1 /* Copyright (c) 2007-2022. The SimGrid Team.
   2  * All rights reserved.                                                     */
   3
   4 /* This program is free software; you can redistribute it and/or modify it
   5  * under the terms of the license (GNU LGPL) which comes with this package. */
   6
   7 #ifndef SIMGRID_MC_LIVENESS_CHECKER_HPP
   8 #define SIMGRID_MC_LIVENESS_CHECKER_HPP
   9
  10 #include "src/mc/api/State.hpp"
  11 #include "src/mc/explo/Exploration.hpp"
  12 #include "xbt/automaton.hpp"
  13
  14 #include <list>
  15 #include <memory>
  16 #include <vector>
  17
  18 namespace simgrid::mc {
  19
  20 class XBT_PRIVATE Pair {
  21 public:
  22   int num                               = 0;
  23   bool search_cycle                     = false;
  24   std::shared_ptr<State> graph_state    = nullptr; /* System state included */
  25   xbt_automaton_state_t automaton_state = nullptr;
  26   std::shared_ptr<const std::vector<int>> atomic_propositions;
  27   int requests             = 0;
  28   int depth                = 0;
  29   bool exploration_started = false;
  30
  31   explicit Pair(unsigned long expanded_pairs);
  32
  33   Pair(Pair const&) = delete;
  34   Pair& operator=(Pair const&) = delete;
  35 };
  36
  37 class XBT_PRIVATE VisitedPair {
  38 public:
  39   int num;
  40   int other_num                      = 0;       /* Dot output for */
  41   std::shared_ptr<State> graph_state = nullptr; /* System state included */
  42   xbt_automaton_state_t automaton_state;
  43   std::shared_ptr<const std::vector<int>> atomic_propositions;
  44   std::size_t heap_bytes_used = 0;
  45   int actors_count            = 0;
  46
  47   VisitedPair(int pair_num, xbt_automaton_state_t automaton_state,
  48               std::shared_ptr<const std::vector<int>> atomic_propositions, std::shared_ptr<State> graph_state);
  49 };
  50
  51 class XBT_PRIVATE LivenessChecker : public Exploration {
  52 public:
  53   explicit LivenessChecker(Session* session);
  54   void run() override;
  55   RecordTrace get_record_trace() override;
  56   std::vector<std::string> get_textual_trace() override;
  57   void log_state() override;
  58
  59 private:
  60   std::shared_ptr<const std::vector<int>> get_proposition_values() const;
  61   std::shared_ptr<VisitedPair> insert_acceptance_pair(Pair* pair);
  62   int insert_visited_pair(std::shared_ptr<VisitedPair> visited_pair, Pair* pair);
  63   void show_acceptance_cycle(std::size_t depth);
  64   void replay();
  65   void remove_acceptance_pair(int pair_num);
  66   void purge_visited_pairs();
  67   void backtrack();
  68   std::shared_ptr<Pair> create_pair(const Pair* pair, xbt_automaton_state_t state,
  69                                     std::shared_ptr<const std::vector<int>> propositions);
  70
  71   // A stack of (application_state, automaton_state) pairs for DFS exploration:
  72   std::list<std::shared_ptr<Pair>> exploration_stack_;
  73   std::list<std::shared_ptr<VisitedPair>> acceptance_pairs_;
  74   std::list<std::shared_ptr<VisitedPair>> visited_pairs_;
  75   unsigned long visited_pairs_count_  = 0;
  76   unsigned long expanded_pairs_count_ = 0;
  77   int previous_pair_                  = 0;
  78   std::string previous_request_;
  79 };
  80
  81 } // namespace simgrid::mc
  82
  83 #endif