src/mc/checker/CommunicationDeterminismChecker.cpp

   1 /* Copyright (c) 2008-2020. 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/checker/CommunicationDeterminismChecker.hpp"
   7 #include "src/kernel/activity/MailboxImpl.hpp"
   8 #include "src/mc/Session.hpp"
   9 #include "src/mc/mc_api.hpp"
  10 #include "src/mc/mc_config.hpp"
  11 #include "src/mc/mc_exit.hpp"
  12 #include "src/mc/mc_private.hpp"
  13 #include "src/mc/mc_request.hpp"
  14 #include "src/mc/mc_smx.hpp"
  15
  16 #if HAVE_SMPI
  17 #include "smpi_request.hpp"
  18 #endif
  19
  20 #include <cstdint>
  21
  22 using mcapi = simgrid::mc::mc_api;
  23
  24 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_comm_determinism, mc, "Logging specific to MC communication determinism detection");
  25
  26 /********** Global variables **********/
  27
  28 std::vector<simgrid::mc::PatternCommunicationList> initial_communications_pattern;
  29 std::vector<std::vector<simgrid::mc::PatternCommunication*>> incomplete_communications_pattern;
  30
  31 /********** Static functions ***********/
  32
  33 static simgrid::mc::CommPatternDifference compare_comm_pattern(const simgrid::mc::PatternCommunication* comm1,
  34                                                                const simgrid::mc::PatternCommunication* comm2)
  35 {
  36   using simgrid::mc::CommPatternDifference;
  37   if (comm1->type != comm2->type)
  38     return CommPatternDifference::TYPE;
  39   if (comm1->rdv != comm2->rdv)
  40     return CommPatternDifference::RDV;
  41   if (comm1->src_proc != comm2->src_proc)
  42     return CommPatternDifference::SRC_PROC;
  43   if (comm1->dst_proc != comm2->dst_proc)
  44     return CommPatternDifference::DST_PROC;
  45   if (comm1->tag != comm2->tag)
  46     return CommPatternDifference::TAG;
  47   if (comm1->data.size() != comm2->data.size())
  48     return CommPatternDifference::DATA_SIZE;
  49   if (comm1->data != comm2->data)
  50     return CommPatternDifference::DATA;
  51   return CommPatternDifference::NONE;
  52 }
  53
  54 static void patterns_copy(std::vector<simgrid::mc::PatternCommunication*>& dest,
  55                              std::vector<simgrid::mc::PatternCommunication> const& source)
  56 {
  57   dest.clear();
  58   for (simgrid::mc::PatternCommunication const& comm : source) {
  59     auto* copy_comm = new simgrid::mc::PatternCommunication(comm.dup());
  60     dest.push_back(copy_comm);
  61   }
  62 }
  63
  64 static void restore_communications_pattern(simgrid::mc::State* state)
  65 {
  66   for (unsigned i = 0; i < initial_communications_pattern.size(); i++)
  67     initial_communications_pattern[i].index_comm = state->communication_indices_[i];
  68
  69   for (unsigned i = 0; i < mcapi::get().get_maxpid(); i++)
  70     patterns_copy(incomplete_communications_pattern[i], state->incomplete_comm_pattern_[i]);
  71 }
  72
  73 static char* print_determinism_result(simgrid::mc::CommPatternDifference diff, int process,
  74                                       const simgrid::mc::PatternCommunication* comm, unsigned int cursor)
  75 {
  76   char* type;
  77   char* res;
  78
  79   if (comm->type == simgrid::mc::PatternCommunicationType::send)
  80     type = bprintf("The send communications pattern of the process %d is different!", process - 1);
  81   else
  82     type = bprintf("The recv communications pattern of the process %d is different!", process - 1);
  83
  84   using simgrid::mc::CommPatternDifference;
  85   switch (diff) {
  86     case CommPatternDifference::TYPE:
  87       res = bprintf("%s Different type for communication #%u", type, cursor);
  88       break;
  89     case CommPatternDifference::RDV:
  90       res = bprintf("%s Different rdv for communication #%u", type, cursor);
  91       break;
  92     case CommPatternDifference::TAG:
  93       res = bprintf("%s Different tag for communication #%u", type, cursor);
  94       break;
  95     case CommPatternDifference::SRC_PROC:
  96       res = bprintf("%s Different source for communication #%u", type, cursor);
  97       break;
  98     case CommPatternDifference::DST_PROC:
  99       res = bprintf("%s Different destination for communication #%u", type, cursor);
 100       break;
 101     case CommPatternDifference::DATA_SIZE:
 102       res = bprintf("%s Different data size for communication #%u", type, cursor);
 103       break;
 104     case CommPatternDifference::DATA:
 105       res = bprintf("%s Different data for communication #%u", type, cursor);
 106       break;
 107     default:
 108       res = nullptr;
 109       break;
 110   }
 111
 112   return res;
 113 }
 114
 115 static void update_comm_pattern(simgrid::mc::PatternCommunication* comm_pattern,
 116                                 const simgrid::kernel::activity::CommImpl* comm_addr)
 117 {
 118   auto src_proc = mcapi::get().get_src_actor(comm_addr);
 119   auto dst_proc = mcapi::get().get_dst_actor(comm_addr);
 120   comm_pattern->src_proc = src_proc->get_pid();
 121   comm_pattern->dst_proc = dst_proc->get_pid();
 122   comm_pattern->src_host = mcapi::get().get_actor_host_name(src_proc);
 123   comm_pattern->dst_host = mcapi::get().get_actor_host_name(dst_proc);
 124
 125   if (comm_pattern->data.empty()) {
 126     auto pattern_data = mcapi::get().get_pattern_comm_data(comm_addr);
 127     if (pattern_data.data() != nullptr) {
 128       auto data_size = pattern_data.size();
 129       comm_pattern->data.resize(data_size);
 130       memcpy(comm_pattern->data.data(), pattern_data.data(), data_size);
 131     }
 132    }
 133 }
 134
 135 namespace simgrid {
 136 namespace mc {
 137
 138 void CommunicationDeterminismChecker::deterministic_comm_pattern(int process, const PatternCommunication* comm,
 139                                                                  int backtracking)
 140 {
 141   if (not backtracking) {
 142     PatternCommunicationList& list = initial_communications_pattern[process];
 143     CommPatternDifference diff     = compare_comm_pattern(list.list[list.index_comm].get(), comm);
 144
 145     if (diff != CommPatternDifference::NONE) {
 146       if (comm->type == PatternCommunicationType::send) {
 147         this->send_deterministic = false;
 148         if (this->send_diff != nullptr)
 149           xbt_free(this->send_diff);
 150         this->send_diff = print_determinism_result(diff, process, comm, list.index_comm + 1);
 151       } else {
 152         this->recv_deterministic = false;
 153         if (this->recv_diff != nullptr)
 154           xbt_free(this->recv_diff);
 155         this->recv_diff = print_determinism_result(diff, process, comm, list.index_comm + 1);
 156       }
 157       if (_sg_mc_send_determinism && not this->send_deterministic) {
 158         XBT_INFO("*********************************************************");
 159         XBT_INFO("***** Non-send-deterministic communications pattern *****");
 160         XBT_INFO("*********************************************************");
 161         XBT_INFO("%s", this->send_diff);
 162         xbt_free(this->send_diff);
 163         this->send_diff = nullptr;
 164         mcapi::get().log_state();
 165         mcapi::get().mc_exit(SIMGRID_MC_EXIT_NON_DETERMINISM);
 166       } else if (_sg_mc_comms_determinism && (not this->send_deterministic && not this->recv_deterministic)) {
 167         XBT_INFO("****************************************************");
 168         XBT_INFO("***** Non-deterministic communications pattern *****");
 169         XBT_INFO("****************************************************");
 170         if (this->send_diff) {
 171           XBT_INFO("%s", this->send_diff);
 172           xbt_free(this->send_diff);
 173           this->send_diff = nullptr;
 174         }
 175         if (this->recv_diff) {
 176           XBT_INFO("%s", this->recv_diff);
 177           xbt_free(this->recv_diff);
 178           this->recv_diff = nullptr;
 179         }
 180         mcapi::get().log_state();
 181         mcapi::get().mc_exit(SIMGRID_MC_EXIT_NON_DETERMINISM);
 182       }
 183     }
 184   }
 185 }
 186
 187 /********** Non Static functions ***********/
 188
 189 void CommunicationDeterminismChecker::get_comm_pattern(smx_simcall_t request, CallType call_type, int backtracking)
 190 {
 191   const smx_actor_t issuer                                     = mcapi::get().simcall_get_issuer(request);
 192   const mc::PatternCommunicationList& initial_pattern          = initial_communications_pattern[issuer->get_pid()];
 193   const std::vector<PatternCommunication*>& incomplete_pattern = incomplete_communications_pattern[issuer->get_pid()];
 194
 195   auto pattern   = std::make_unique<PatternCommunication>();
 196   pattern->index = initial_pattern.index_comm + incomplete_pattern.size();
 197
 198   if (call_type == CallType::SEND) {
 199     /* Create comm pattern */
 200     pattern->type      = PatternCommunicationType::send;
 201     pattern->comm_addr = mcapi::get().get_comm_isend_raw_addr(request);
 202     pattern->rdv      = mcapi::get().get_pattern_comm_rdv(pattern->comm_addr);
 203     pattern->src_proc = mcapi::get().get_pattern_comm_src_proc(pattern->comm_addr);
 204     pattern->src_host = mc_api::get().get_actor_host_name(issuer);
 205
 206 #if HAVE_SMPI
 207     pattern->tag = mcapi::get().get_smpi_request_tag(request, simgrid::simix::Simcall::COMM_ISEND);
 208 #endif
 209     auto pattern_data = mcapi::get().get_pattern_comm_data(pattern->comm_addr);
 210     if (pattern_data.data() != nullptr) {
 211       auto data_size = pattern_data.size();
 212       pattern->data.resize(data_size);
 213       memcpy(pattern->data.data(), pattern_data.data(), data_size);
 214     }
 215
 216 #if HAVE_SMPI
 217     auto send_detached = mcapi::get().check_send_request_detached(request);
 218     if (send_detached) {
 219       if (this->initial_communications_pattern_done) {
 220         /* Evaluate comm determinism */
 221         this->deterministic_comm_pattern(pattern->src_proc, pattern.get(), backtracking);
 222         initial_communications_pattern[pattern->src_proc].index_comm++;
 223       } else {
 224         /* Store comm pattern */
 225         initial_communications_pattern[pattern->src_proc].list.push_back(std::move(pattern));
 226       }
 227       return;
 228     }
 229 #endif
 230   } else if (call_type == CallType::RECV) {
 231     pattern->type = PatternCommunicationType::receive;
 232     pattern->comm_addr = mcapi::get().get_comm_isend_raw_addr(request);
 233
 234 #if HAVE_SMPI
 235     pattern->tag = mcapi::get().get_smpi_request_tag(request, simgrid::simix::Simcall::COMM_IRECV);
 236 #endif
 237     auto comm_addr = pattern->comm_addr;
 238     pattern->rdv = mcapi::get().get_pattern_comm_rdv(comm_addr);
 239     pattern->dst_proc = mcapi::get().get_pattern_comm_dst_proc(comm_addr);
 240     pattern->dst_host = mcapi::get().get_actor_host_name(issuer);
 241   } else
 242     xbt_die("Unexpected call_type %i", (int)call_type);
 243
 244   XBT_DEBUG("Insert incomplete comm pattern %p for process %ld", pattern.get(), issuer->get_pid());
 245   incomplete_communications_pattern[issuer->get_pid()].push_back(pattern.release());
 246 }
 247
 248 void CommunicationDeterminismChecker::complete_comm_pattern(const kernel::activity::CommImpl* comm_addr,
 249                                                             unsigned int issuer, int backtracking)
 250 {
 251   /* Complete comm pattern */
 252   std::vector<PatternCommunication*>& incomplete_pattern = incomplete_communications_pattern[issuer];
 253   auto current_comm_pattern =
 254       std::find_if(begin(incomplete_pattern), end(incomplete_pattern),
 255                    [&comm_addr](const PatternCommunication* comm) { return mcapi::get().comm_addr_equal(comm->comm_addr, comm_addr); });
 256   if (current_comm_pattern == std::end(incomplete_pattern))
 257     xbt_die("Corresponding communication not found!");
 258
 259   update_comm_pattern(*current_comm_pattern, comm_addr);
 260   std::unique_ptr<PatternCommunication> comm_pattern(*current_comm_pattern);
 261   XBT_DEBUG("Remove incomplete comm pattern for process %u at cursor %zd", issuer,
 262             std::distance(begin(incomplete_pattern), current_comm_pattern));
 263   incomplete_pattern.erase(current_comm_pattern);
 264
 265   if (this->initial_communications_pattern_done) {
 266     /* Evaluate comm determinism */
 267     this->deterministic_comm_pattern(issuer, comm_pattern.get(), backtracking);
 268     initial_communications_pattern[issuer].index_comm++;
 269   } else {
 270     /* Store comm pattern */
 271     initial_communications_pattern[issuer].list.push_back(std::move(comm_pattern));
 272   }
 273 }
 274
 275 CommunicationDeterminismChecker::CommunicationDeterminismChecker(Session& s) : Checker(s) {}
 276
 277 CommunicationDeterminismChecker::~CommunicationDeterminismChecker() = default;
 278
 279 RecordTrace CommunicationDeterminismChecker::get_record_trace() // override
 280 {
 281   RecordTrace res;
 282   for (auto const& state : stack_)
 283     res.push_back(state->get_transition());
 284   return res;
 285 }
 286
 287 std::vector<std::string> CommunicationDeterminismChecker::get_textual_trace() // override
 288 {
 289   std::vector<std::string> trace;
 290   for (auto const& state : stack_) {
 291     smx_simcall_t req = &state->executed_req_;
 292     trace.push_back(mcapi::get().request_to_string(req, state->transition_.argument_, RequestType::executed));
 293   }
 294   return trace;
 295 }
 296
 297 void CommunicationDeterminismChecker::log_state() // override
 298 {
 299   if (_sg_mc_comms_determinism) {
 300     if (this->send_deterministic && not this->recv_deterministic) {
 301       XBT_INFO("*******************************************************");
 302       XBT_INFO("**** Only-send-deterministic communication pattern ****");
 303       XBT_INFO("*******************************************************");
 304       XBT_INFO("%s", this->recv_diff);
 305     }
 306     if (not this->send_deterministic && this->recv_deterministic) {
 307       XBT_INFO("*******************************************************");
 308       XBT_INFO("**** Only-recv-deterministic communication pattern ****");
 309       XBT_INFO("*******************************************************");
 310       XBT_INFO("%s", this->send_diff);
 311     }
 312   }
 313   XBT_INFO("Expanded states = %lu", expanded_states_count_);
 314   XBT_INFO("Visited states = %lu", mcapi::get().mc_get_visited_states());
 315   XBT_INFO("Executed transitions = %lu", mcapi::get().mc_get_executed_trans());
 316   XBT_INFO("Send-deterministic : %s", this->send_deterministic ? "Yes" : "No");
 317   if (_sg_mc_comms_determinism)
 318     XBT_INFO("Recv-deterministic : %s", this->recv_deterministic ? "Yes" : "No");
 319 }
 320
 321 void CommunicationDeterminismChecker::prepare()
 322 {
 323   const int maxpid = mcapi::get().get_maxpid();
 324
 325   initial_communications_pattern.resize(maxpid);
 326   incomplete_communications_pattern.resize(maxpid);
 327
 328   ++expanded_states_count_;
 329   auto initial_state = std::make_unique<State>(expanded_states_count_);
 330
 331   XBT_DEBUG("********* Start communication determinism verification *********");
 332
 333   /* Get an enabled actor and insert it in the interleave set of the initial state */
 334   auto actors = mcapi::get().get_actors();
 335   for (auto& actor : actors)
 336     if (mcapi::get().actor_is_enabled(actor.copy.get_buffer()->get_pid()))
 337       initial_state->add_interleaving_set(actor.copy.get_buffer());
 338
 339   stack_.push_back(std::move(initial_state));
 340 }
 341
 342 static inline bool all_communications_are_finished()
 343 {
 344   auto maxpid = mcapi::get().get_maxpid();
 345   for (size_t current_actor = 1; current_actor < maxpid; current_actor++) {
 346     if (not incomplete_communications_pattern[current_actor].empty()) {
 347       XBT_DEBUG("Some communications are not finished, cannot stop the exploration! State not visited.");
 348       return false;
 349     }
 350   }
 351   return true;
 352 }
 353
 354 void CommunicationDeterminismChecker::restoreState()
 355 {
 356   /* Intermediate backtracking */
 357   State* last_state = stack_.back().get();
 358   if (last_state->system_state_) {
 359     mc_api::get().restore_state(last_state->system_state_);
 360     restore_communications_pattern(last_state);
 361     return;
 362   }
 363
 364   /* Restore the initial state */
 365   mcapi::get().restore_initial_state();
 366
 367   unsigned n = mcapi::get().get_maxpid();
 368   assert(n == incomplete_communications_pattern.size());
 369   assert(n == initial_communications_pattern.size());
 370   for (unsigned j = 0; j < n; j++) {
 371     incomplete_communications_pattern[j].clear();
 372     initial_communications_pattern[j].index_comm = 0;
 373   }
 374
 375   /* Traverse the stack from the state at position start and re-execute the transitions */
 376   for (std::unique_ptr<simgrid::mc::State> const& state : stack_) {
 377     if (state == stack_.back())
 378       break;
 379
 380     int req_num                    = state->transition_.argument_;
 381     const s_smx_simcall* saved_req = &state->executed_req_;
 382     xbt_assert(saved_req);
 383
 384     /* because we got a copy of the executed request, we have to fetch the
 385        real one, pointed by the request field of the issuer process */
 386
 387     const smx_actor_t issuer = mcapi::get().simcall_get_issuer(saved_req);
 388     smx_simcall_t req        = &issuer->simcall_;
 389
 390     /* TODO : handle test and testany simcalls */
 391     CallType call = MC_get_call_type(req);
 392     mcapi::get().handle_simcall(state->transition_);
 393     handle_comm_pattern(call, req, req_num, 1);
 394     mcapi::get().mc_wait_for_requests();
 395
 396     /* Update statistics */
 397     mcapi::get().mc_inc_visited_states();
 398     mcapi::get().mc_inc_executed_trans();
 399   }
 400 }
 401
 402 void CommunicationDeterminismChecker::handle_comm_pattern(simgrid::mc::CallType call_type, smx_simcall_t req, int value, int backtracking)
 403 {
 404   using simgrid::mc::CallType;
 405   switch(call_type) {
 406     case CallType::NONE:
 407       break;
 408     case CallType::SEND:
 409     case CallType::RECV:
 410       get_comm_pattern(req, call_type, backtracking);
 411       break;
 412     case CallType::WAIT:
 413     case CallType::WAITANY: {
 414       simgrid::kernel::activity::CommImpl* comm_addr = nullptr;
 415       if (call_type == CallType::WAIT)
 416         comm_addr = mcapi::get().get_comm_wait_raw_addr(req);
 417       else
 418         comm_addr = mcapi::get().get_comm_waitany_raw_addr(req, value);
 419       auto simcall_issuer = mcapi::get().simcall_get_issuer(req);
 420       complete_comm_pattern(comm_addr, simcall_issuer->get_pid(), backtracking);
 421     } break;
 422   default:
 423     xbt_die("Unexpected call type %i", (int)call_type);
 424   }
 425 }
 426
 427 void CommunicationDeterminismChecker::real_run()
 428 {
 429   std::unique_ptr<VisitedState> visited_state = nullptr;
 430   smx_simcall_t req                           = nullptr;
 431
 432   while (not stack_.empty()) {
 433     /* Get current state */
 434     State* cur_state = stack_.back().get();
 435
 436     XBT_DEBUG("**************************************************");
 437     XBT_DEBUG("Exploration depth = %zu (state = %d, interleaved processes = %zu)", stack_.size(), cur_state->num_,
 438               cur_state->interleave_size());
 439
 440     /* Update statistics */
 441     mcapi::get().mc_inc_visited_states();
 442
 443     if (stack_.size() <= (std::size_t)_sg_mc_max_depth)
 444       req = mcapi::get().mc_state_choose_request(cur_state);
 445     else
 446       req = nullptr;
 447
 448     if (req != nullptr && visited_state == nullptr) {
 449       int req_num = cur_state->transition_.argument_;
 450
 451       XBT_DEBUG("Execute: %s", mcapi::get().request_to_string(req, req_num, RequestType::simix).c_str());
 452
 453       std::string req_str;
 454       if (dot_output != nullptr)
 455         req_str = mcapi::get().request_get_dot_output(req, req_num);
 456
 457       mcapi::get().mc_inc_executed_trans();
 458
 459       /* TODO : handle test and testany simcalls */
 460       CallType call = CallType::NONE;
 461       if (_sg_mc_comms_determinism || _sg_mc_send_determinism)
 462         call = MC_get_call_type(req);
 463
 464       /* Answer the request */
 465       mcapi::get().handle_simcall(cur_state->transition_);
 466       /* After this call req is no longer useful */
 467
 468       handle_comm_pattern(call, req, req_num, 0);
 469
 470       /* Wait for requests (schedules processes) */
 471       mcapi::get().mc_wait_for_requests();
 472
 473       /* Create the new expanded state */
 474       ++expanded_states_count_;
 475       auto next_state = std::make_unique<State>(expanded_states_count_);
 476
 477       /* If comm determinism verification, we cannot stop the exploration if some communications are not finished (at
 478        * least, data are transferred). These communications  are incomplete and they cannot be analyzed and compared
 479        * with the initial pattern. */
 480       bool compare_snapshots = this->initial_communications_pattern_done && all_communications_are_finished();
 481
 482       if (_sg_mc_max_visited_states != 0)
 483         visited_state = visited_states_.addVisitedState(expanded_states_count_, next_state.get(), compare_snapshots);
 484       else
 485         visited_state = nullptr;
 486
 487       if (visited_state == nullptr) {
 488         /* Get enabled actors and insert them in the interleave set of the next state */
 489         auto actors = mcapi::get().get_actors();
 490         for (auto& actor : actors)
 491           if (mcapi::get().actor_is_enabled(actor.copy.get_buffer()->get_pid()))
 492             next_state->add_interleaving_set(actor.copy.get_buffer());
 493
 494         if (dot_output != nullptr)
 495           fprintf(dot_output, "\"%d\" -> \"%d\" [%s];\n", cur_state->num_, next_state->num_, req_str.c_str());
 496
 497       } else if (dot_output != nullptr)
 498         fprintf(dot_output, "\"%d\" -> \"%d\" [%s];\n", cur_state->num_,
 499                 visited_state->original_num == -1 ? visited_state->num : visited_state->original_num, req_str.c_str());
 500
 501       stack_.push_back(std::move(next_state));
 502     } else {
 503       if (stack_.size() > (std::size_t)_sg_mc_max_depth)
 504         XBT_WARN("/!\\ Max depth reached! /!\\ ");
 505       else if (visited_state != nullptr)
 506         XBT_DEBUG("State already visited (equal to state %d), exploration stopped on this path.",
 507                   visited_state->original_num == -1 ? visited_state->num : visited_state->original_num);
 508       else
 509         XBT_DEBUG("There are no more processes to interleave. (depth %zu)", stack_.size());
 510
 511       this->initial_communications_pattern_done = true;
 512
 513       /* Trash the current state, no longer needed */
 514       XBT_DEBUG("Delete state %d at depth %zu", cur_state->num_, stack_.size());
 515       stack_.pop_back();
 516
 517       visited_state = nullptr;
 518
 519       /* Check for deadlocks */
 520       if (mcapi::get().mc_check_deadlock()) {
 521         mcapi::get().mc_show_deadlock();
 522         throw simgrid::mc::DeadlockError();
 523       }
 524
 525       while (not stack_.empty()) {
 526         std::unique_ptr<State> state(std::move(stack_.back()));
 527         stack_.pop_back();
 528         if (state->interleave_size() && stack_.size() < (std::size_t)_sg_mc_max_depth) {
 529           /* We found a back-tracking point, let's loop */
 530           XBT_DEBUG("Back-tracking to state %d at depth %zu", state->num_, stack_.size() + 1);
 531           stack_.push_back(std::move(state));
 532
 533           this->restoreState();
 534
 535           XBT_DEBUG("Back-tracking to state %d at depth %zu done", stack_.back()->num_, stack_.size());
 536
 537           break;
 538         } else {
 539           XBT_DEBUG("Delete state %d at depth %zu", state->num_, stack_.size() + 1);
 540         }
 541       }
 542     }
 543   }
 544
 545   mcapi::get().log_state();
 546 }
 547
 548 void CommunicationDeterminismChecker::run()
 549 {
 550   XBT_INFO("Check communication determinism");
 551   mcapi::get().s_initialize();
 552
 553   this->prepare();
 554   this->real_run();
 555 }
 556
 557 Checker* createCommunicationDeterminismChecker(Session& s)
 558 {
 559   return new CommunicationDeterminismChecker(s);
 560 }
 561
 562 } // namespace mc
 563 } // namespace simgrid