src/mc/api.cpp

   1 /* Copyright (c) 2020-2022. 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 "api.hpp"
   7
   8 #include "src/kernel/activity/MailboxImpl.hpp"
   9 #include "src/kernel/activity/MutexImpl.hpp"
  10 #include "src/kernel/actor/SimcallObserver.hpp"
  11 #include "src/mc/Session.hpp"
  12 #include "src/mc/checker/Checker.hpp"
  13 #include "src/mc/mc_base.hpp"
  14 #include "src/mc/mc_comm_pattern.hpp"
  15 #include "src/mc/mc_exit.hpp"
  16 #include "src/mc/mc_pattern.hpp"
  17 #include "src/mc/mc_private.hpp"
  18 #include "src/mc/remote/RemoteProcess.hpp"
  19 #include "src/surf/HostImpl.hpp"
  20
  21 #include <xbt/asserts.h>
  22 #include <xbt/log.h>
  23 #include "simgrid/s4u/Host.hpp"
  24 #include "xbt/string.hpp"
  25 #if HAVE_SMPI
  26 #include "src/smpi/include/smpi_request.hpp"
  27 #endif
  28
  29 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(Api, mc, "Logging specific to MC Facade APIs ");
  30 XBT_LOG_EXTERNAL_CATEGORY(mc_global);
  31
  32 using Simcall = simgrid::simix::Simcall;
  33
  34 namespace simgrid {
  35 namespace mc {
  36
  37 static inline const char* get_color(int id)
  38 {
  39   static constexpr std::array<const char*, 13> colors{{"blue", "red", "green3", "goldenrod", "brown", "purple",
  40                                                        "magenta", "turquoise4", "gray25", "forestgreen", "hotpink",
  41                                                        "lightblue", "tan"}};
  42   return colors[id % colors.size()];
  43 }
  44
  45 static std::string pointer_to_string(void* pointer)
  46 {
  47   return XBT_LOG_ISENABLED(Api, xbt_log_priority_verbose) ? xbt::string_printf("%p", pointer) : "(verbose only)";
  48 }
  49
  50 static std::string buff_size_to_string(size_t buff_size)
  51 {
  52   return XBT_LOG_ISENABLED(Api, xbt_log_priority_verbose) ? std::to_string(buff_size) : "(verbose only)";
  53 }
  54
  55 /* Search an enabled transition for the given process.
  56  *
  57  * This can be seen as an iterator returning the next transition of the process.
  58  *
  59  * We only consider the processes that are both
  60  *  - marked "to be interleaved" in their ActorState (controlled by the checker algorithm).
  61  *  - which simcall can currently be executed (like a comm where the other partner is already known)
  62  * Once we returned the last enabled transition of a process, it is marked done.
  63  *
  64  * Things can get muddled with the WAITANY and TESTANY simcalls, that are rewritten on the fly to a bunch of WAIT
  65  * (resp TEST) transitions using the transition.argument field to remember what was the last returned sub-transition.
  66  */
  67 static inline smx_simcall_t MC_state_choose_request_for_process(const RemoteProcess& process, simgrid::mc::State* state,
  68                                                                 smx_actor_t actor)
  69 {
  70   /* reset the outgoing transition */
  71   simgrid::mc::ActorState* procstate = &state->actor_states_[actor->get_pid()];
  72   state->transition_.aid_              = -1;
  73   state->transition_.times_considered_ = -1;
  74   state->transition_.textual[0]        = '\0';
  75   state->executed_req_.call_         = Simcall::NONE;
  76
  77   if (not simgrid::mc::actor_is_enabled(actor))
  78     return nullptr; // Not executable in the application
  79
  80   smx_simcall_t req = nullptr;
  81   if (actor->simcall_.observer_ != nullptr) {
  82     state->transition_.times_considered_ = procstate->get_times_considered_and_inc();
  83     if (actor->simcall_.mc_max_consider_ <= procstate->get_times_considered())
  84       procstate->set_done();
  85     req = &actor->simcall_;
  86   } else {
  87     procstate->set_done();
  88     state->transition_.times_considered_ = 0;
  89     req                                  = &actor->simcall_;
  90   }
  91   if (not req)
  92     return nullptr;
  93
  94   state->transition_.aid_ = actor->get_pid();
  95   state->executed_req_    = *req;
  96
  97   // Fetch the data of the request and translate it:
  98   state->internal_req_ = *req;
  99   state->internal_req_.mc_value_ = state->transition_.times_considered_;
 100
 101   return req;
 102 }
 103
 104 kernel::activity::CommImpl* Api::get_comm_or_nullptr(smx_simcall_t const r) const
 105 {
 106   if (auto wait = dynamic_cast<kernel::actor::ActivityWaitSimcall*>(r->observer_))
 107     return static_cast<kernel::activity::CommImpl*>(wait->get_activity());
 108   if (auto test = dynamic_cast<kernel::actor::ActivityTestSimcall*>(r->observer_))
 109     return static_cast<kernel::activity::CommImpl*>(test->get_activity());
 110   return nullptr;
 111 }
 112
 113 /** Statically "upcast" a s_smx_actor_t into an ActorInformation
 114  *
 115  *  This gets 'actorInfo' from '&actorInfo->copy'. It upcasts in the
 116  *  sense that we could achieve the same thing by having ActorInformation
 117  *  inherit from s_smx_actor_t but we don't really want to do that.
 118  */
 119 simgrid::mc::ActorInformation* Api::actor_info_cast(smx_actor_t actor) const
 120 {
 121   simgrid::mc::ActorInformation temp;
 122   std::size_t offset = (char*)temp.copy.get_buffer() - (char*)&temp;
 123
 124   auto* process_info = reinterpret_cast<simgrid::mc::ActorInformation*>((char*)actor - offset);
 125   return process_info;
 126 }
 127
 128 bool Api::simcall_check_dependency(smx_simcall_t req1, smx_simcall_t req2) const
 129 {
 130   // FIXME: this should be removed now
 131   /* Make sure that req1 and req2 are in alphabetic order */
 132   if (req1->call_ > req2->call_) {
 133     auto temp = req1;
 134     req1      = req2;
 135     req2      = temp;
 136   }
 137   return true;
 138 }
 139
 140 xbt::string const& Api::get_actor_host_name(smx_actor_t actor) const
 141 {
 142   if (mc_model_checker == nullptr)
 143     return actor->get_host()->get_name();
 144
 145   const simgrid::mc::RemoteProcess* process = &mc_model_checker->get_remote_process();
 146
 147   // Read the simgrid::xbt::string in the MCed process:
 148   simgrid::mc::ActorInformation* info = actor_info_cast(actor);
 149
 150   if (not info->hostname) {
 151     Remote<s4u::Host> temp_host = process->read(remote(actor->get_host()));
 152     auto remote_string_address  = remote(&xbt::string::to_string_data(temp_host.get_buffer()->get_impl()->get_name()));
 153     simgrid::xbt::string_data remote_string = process->read(remote_string_address);
 154     std::vector<char> hostname(remote_string.len + 1);
 155     // no need to read the terminating null byte, and thus hostname[remote_string.len] is guaranteed to be '\0'
 156     process->read_bytes(hostname.data(), remote_string.len, remote(remote_string.data));
 157     info->hostname = &mc_model_checker->get_host_name(hostname.data());
 158   }
 159   return *info->hostname;
 160 }
 161
 162 xbt::string const& Api::get_actor_name(smx_actor_t actor) const
 163 {
 164   if (mc_model_checker == nullptr)
 165     return actor->get_name();
 166
 167   simgrid::mc::ActorInformation* info = actor_info_cast(actor);
 168   if (info->name.empty()) {
 169     const simgrid::mc::RemoteProcess* process = &mc_model_checker->get_remote_process();
 170
 171     simgrid::xbt::string_data string_data = simgrid::xbt::string::to_string_data(actor->name_);
 172     info->name = process->read_string(remote(string_data.data), string_data.len);
 173   }
 174   return info->name;
 175 }
 176
 177 std::string Api::get_actor_string(smx_actor_t actor) const
 178 {
 179   std::string res;
 180   if (actor) {
 181     res = "(" + std::to_string(actor->get_pid()) + ")";
 182     if (actor->get_host())
 183       res += std::string(get_actor_host_name(actor)) + " (" + std::string(get_actor_name(actor)) + ")";
 184     else
 185       res += get_actor_name(actor);
 186   } else
 187     res = "(0) ()";
 188   return res;
 189 }
 190
 191 std::string Api::get_actor_dot_label(smx_actor_t actor) const
 192 {
 193   std::string res = "(" + std::to_string(actor->get_pid()) + ")";
 194   if (actor->get_host())
 195     res += get_actor_host_name(actor);
 196   return res;
 197 }
 198
 199 simgrid::mc::Checker* Api::initialize(char** argv, simgrid::mc::CheckerAlgorithm algo) const
 200 {
 201   auto session = new simgrid::mc::Session([argv] {
 202     int i = 1;
 203     while (argv[i] != nullptr && argv[i][0] == '-')
 204       i++;
 205     xbt_assert(argv[i] != nullptr,
 206                "Unable to find a binary to exec on the command line. Did you only pass config flags?");
 207     execvp(argv[i], argv + i);
 208     xbt_die("The model-checked process failed to exec(%s): %s", argv[i], strerror(errno));
 209   });
 210
 211   simgrid::mc::Checker* checker;
 212   switch (algo) {
 213     case CheckerAlgorithm::CommDeterminism:
 214       checker = simgrid::mc::create_communication_determinism_checker(session);
 215       break;
 216
 217     case CheckerAlgorithm::UDPOR:
 218       checker = simgrid::mc::create_udpor_checker(session);
 219       break;
 220
 221     case CheckerAlgorithm::Safety:
 222       checker = simgrid::mc::create_safety_checker(session);
 223       break;
 224
 225     case CheckerAlgorithm::Liveness:
 226       checker = simgrid::mc::create_liveness_checker(session);
 227       break;
 228
 229     default:
 230       THROW_IMPOSSIBLE;
 231   }
 232
 233   // FIXME: session and checker are never deleted
 234   simgrid::mc::session_singleton = session;
 235   mc_model_checker->setChecker(checker);
 236   return checker;
 237 }
 238
 239 std::vector<simgrid::mc::ActorInformation>& Api::get_actors() const
 240 {
 241   return mc_model_checker->get_remote_process().actors();
 242 }
 243
 244 unsigned long Api::get_maxpid() const
 245 {
 246   return mc_model_checker->get_remote_process().get_maxpid();
 247 }
 248
 249 int Api::get_actors_size() const
 250 {
 251   return mc_model_checker->get_remote_process().actors().size();
 252 }
 253
 254 RemotePtr<kernel::activity::CommImpl> Api::get_comm_isend_raw_addr(smx_simcall_t request) const
 255 {
 256   return remote(static_cast<kernel::activity::CommImpl*>(simcall_comm_isend__getraw__result(request)));
 257 }
 258
 259 RemotePtr<kernel::activity::CommImpl> Api::get_comm_waitany_raw_addr(smx_simcall_t request, int value) const
 260 {
 261   auto addr      = simcall_comm_waitany__getraw__comms(request) + value;
 262   auto comm_addr = mc_model_checker->get_remote_process().read(remote(addr));
 263   return RemotePtr<kernel::activity::CommImpl>(static_cast<kernel::activity::CommImpl*>(comm_addr));
 264 }
 265
 266 std::string Api::get_pattern_comm_rdv(RemotePtr<kernel::activity::CommImpl> const& addr) const
 267 {
 268   Remote<kernel::activity::CommImpl> temp_activity;
 269   mc_model_checker->get_remote_process().read(temp_activity, addr);
 270   const kernel::activity::CommImpl* activity = temp_activity.get_buffer();
 271
 272   char* remote_name = mc_model_checker->get_remote_process().read<char*>(RemotePtr<char*>(
 273       (uint64_t)(activity->get_mailbox() ? &activity->get_mailbox()->get_name() : &activity->mbox_cpy->get_name())));
 274   auto rdv          = mc_model_checker->get_remote_process().read_string(RemotePtr<char>(remote_name));
 275   return rdv;
 276 }
 277
 278 unsigned long Api::get_pattern_comm_src_proc(RemotePtr<kernel::activity::CommImpl> const& addr) const
 279 {
 280   Remote<kernel::activity::CommImpl> temp_activity;
 281   mc_model_checker->get_remote_process().read(temp_activity, addr);
 282   const kernel::activity::CommImpl* activity = temp_activity.get_buffer();
 283   auto src_proc =
 284       mc_model_checker->get_remote_process().resolve_actor(mc::remote(activity->src_actor_.get()))->get_pid();
 285   return src_proc;
 286 }
 287
 288 unsigned long Api::get_pattern_comm_dst_proc(RemotePtr<kernel::activity::CommImpl> const& addr) const
 289 {
 290   Remote<kernel::activity::CommImpl> temp_activity;
 291   mc_model_checker->get_remote_process().read(temp_activity, addr);
 292   const kernel::activity::CommImpl* activity = temp_activity.get_buffer();
 293   auto src_proc =
 294       mc_model_checker->get_remote_process().resolve_actor(mc::remote(activity->dst_actor_.get()))->get_pid();
 295   return src_proc;
 296 }
 297
 298 std::vector<char> Api::get_pattern_comm_data(RemotePtr<kernel::activity::CommImpl> const& addr) const
 299 {
 300   simgrid::mc::Remote<simgrid::kernel::activity::CommImpl> temp_comm;
 301   mc_model_checker->get_remote_process().read(temp_comm, addr);
 302   const simgrid::kernel::activity::CommImpl* comm = temp_comm.get_buffer();
 303
 304   std::vector<char> buffer{};
 305   if (comm->src_buff_ != nullptr) {
 306     buffer.resize(comm->src_buff_size_);
 307     mc_model_checker->get_remote_process().read_bytes(buffer.data(), buffer.size(), remote(comm->src_buff_));
 308   }
 309   return buffer;
 310 }
 311
 312 #if HAVE_SMPI
 313 bool Api::check_send_request_detached(smx_simcall_t const& simcall) const
 314 {
 315   Remote<simgrid::smpi::Request> mpi_request;
 316   mc_model_checker->get_remote_process().read(
 317       mpi_request, remote(static_cast<smpi::Request*>(simcall_comm_isend__get__data(simcall))));
 318   return mpi_request.get_buffer()->detached();
 319 }
 320 #endif
 321
 322 smx_actor_t Api::get_src_actor(RemotePtr<kernel::activity::CommImpl> const& comm_addr) const
 323 {
 324   simgrid::mc::Remote<simgrid::kernel::activity::CommImpl> temp_comm;
 325   mc_model_checker->get_remote_process().read(temp_comm, comm_addr);
 326   const simgrid::kernel::activity::CommImpl* comm = temp_comm.get_buffer();
 327
 328   auto src_proc = mc_model_checker->get_remote_process().resolve_actor(simgrid::mc::remote(comm->src_actor_.get()));
 329   return src_proc;
 330 }
 331
 332 smx_actor_t Api::get_dst_actor(RemotePtr<kernel::activity::CommImpl> const& comm_addr) const
 333 {
 334   simgrid::mc::Remote<simgrid::kernel::activity::CommImpl> temp_comm;
 335   mc_model_checker->get_remote_process().read(temp_comm, comm_addr);
 336   const simgrid::kernel::activity::CommImpl* comm = temp_comm.get_buffer();
 337
 338   auto dst_proc = mc_model_checker->get_remote_process().resolve_actor(simgrid::mc::remote(comm->dst_actor_.get()));
 339   return dst_proc;
 340 }
 341
 342 std::size_t Api::get_remote_heap_bytes() const
 343 {
 344   RemoteProcess& process    = mc_model_checker->get_remote_process();
 345   auto heap_bytes_used      = mmalloc_get_bytes_used_remote(process.get_heap()->heaplimit, process.get_malloc_info());
 346   return heap_bytes_used;
 347 }
 348
 349 void Api::mc_inc_visited_states() const
 350 {
 351   mc_model_checker->visited_states++;
 352 }
 353
 354 void Api::mc_inc_executed_trans() const
 355 {
 356   mc_model_checker->executed_transitions++;
 357 }
 358
 359 unsigned long Api::mc_get_visited_states() const
 360 {
 361   return mc_model_checker->visited_states;
 362 }
 363
 364 unsigned long Api::mc_get_executed_trans() const
 365 {
 366   return mc_model_checker->executed_transitions;
 367 }
 368
 369 void Api::mc_check_deadlock() const
 370 {
 371   if (mc_model_checker->checkDeadlock()) {
 372     XBT_CINFO(mc_global, "**************************");
 373     XBT_CINFO(mc_global, "*** DEADLOCK DETECTED ***");
 374     XBT_CINFO(mc_global, "**************************");
 375     XBT_CINFO(mc_global, "Counter-example execution trace:");
 376     for (auto const& s : mc_model_checker->getChecker()->get_textual_trace())
 377       XBT_CINFO(mc_global, "  %s", s.c_str());
 378     simgrid::mc::dumpRecordPath();
 379     simgrid::mc::session_singleton->log_state();
 380     throw DeadlockError();
 381   }
 382 }
 383
 384 /** Get the issuer of a simcall (`req->issuer`)
 385  *
 386  *  In split-process mode, it does the black magic necessary to get an address
 387  *  of a (shallow) copy of the data structure the issuer SIMIX actor in the local
 388  *  address space.
 389  *
 390  *  @param process the MCed process
 391  *  @param req     the simcall (copied in the local process)
 392  */
 393 smx_actor_t Api::simcall_get_issuer(s_smx_simcall const* req) const
 394 {
 395   xbt_assert(mc_model_checker != nullptr);
 396
 397   // This is the address of the smx_actor in the MCed process:
 398   auto address = simgrid::mc::remote(req->issuer_);
 399
 400   // Lookup by address:
 401   for (auto& actor : mc_model_checker->get_remote_process().actors())
 402     if (actor.address == address)
 403       return actor.copy.get_buffer();
 404   for (auto& actor : mc_model_checker->get_remote_process().dead_actors())
 405     if (actor.address == address)
 406       return actor.copy.get_buffer();
 407
 408   xbt_die("Issuer not found");
 409 }
 410
 411 RemotePtr<kernel::activity::MailboxImpl> Api::get_mbox_remote_addr(smx_simcall_t const req) const
 412 {
 413   if (req->call_ == Simcall::COMM_ISEND)
 414     return remote(simcall_comm_isend__get__mbox(req));
 415   if (req->call_ == Simcall::COMM_IRECV)
 416     return remote(simcall_comm_irecv__get__mbox(req));
 417   THROW_IMPOSSIBLE;
 418 }
 419
 420 RemotePtr<kernel::activity::ActivityImpl> Api::get_comm_remote_addr(smx_simcall_t const req) const
 421 {
 422   if (req->call_ == Simcall::COMM_ISEND)
 423     return remote(simcall_comm_isend__getraw__result(req));
 424   if (req->call_ == Simcall::COMM_IRECV)
 425     return remote(simcall_comm_irecv__getraw__result(req));
 426   THROW_IMPOSSIBLE;
 427 }
 428
 429 void Api::handle_simcall(Transition const& transition) const
 430 {
 431   mc_model_checker->handle_simcall(transition);
 432 }
 433
 434 void Api::mc_wait_for_requests() const
 435 {
 436   mc_model_checker->wait_for_requests();
 437 }
 438
 439 void Api::mc_exit(int status) const
 440 {
 441   mc_model_checker->exit(status);
 442 }
 443
 444 void Api::dump_record_path() const
 445 {
 446   simgrid::mc::dumpRecordPath();
 447 }
 448
 449 smx_simcall_t Api::mc_state_choose_request(simgrid::mc::State* state) const
 450 {
 451   RemoteProcess& process = mc_model_checker->get_remote_process();
 452   XBT_DEBUG("Search for an actor to run. %zu actors to consider", process.actors().size());
 453   for (auto& actor : process.actors()) {
 454     /* Only consider the actors that were marked as interleaving by the checker algorithm */
 455     if (not state->actor_states_[actor.copy.get_buffer()->get_pid()].is_todo())
 456       continue;
 457
 458     smx_simcall_t res = MC_state_choose_request_for_process(process, state, actor.copy.get_buffer());
 459     if (res) {
 460       XBT_DEBUG("Let's run actor %ld, going for transition %s", actor.copy.get_buffer()->get_pid(),
 461                 SIMIX_simcall_name(*res));
 462       return res;
 463     }
 464   }
 465   return nullptr;
 466 }
 467
 468 std::list<transition_detail_t> Api::get_enabled_transitions(simgrid::mc::State* state) const
 469 {
 470   std::list<transition_detail_t> tr_list{};
 471
 472   for (auto& actor : mc_model_checker->get_remote_process().actors()) {
 473     auto actor_pid  = actor.copy.get_buffer()->get_pid();
 474     auto actor_impl = actor.copy.get_buffer();
 475
 476     // Only consider the actors that were marked as interleaving by the checker algorithm
 477     if (not state->actor_states_[actor_pid].is_todo())
 478       continue;
 479     // Not executable in the application
 480     if (not simgrid::mc::actor_is_enabled(actor_impl))
 481       continue;
 482
 483     auto transition       = std::make_unique<s_transition_detail>();
 484     Simcall simcall_call  = actor_impl->simcall_.call_;
 485     smx_simcall_t simcall = &actor_impl->simcall_;
 486     transition->call_     = simcall_call;
 487     switch (simcall_call) {
 488       case Simcall::COMM_ISEND:
 489       case Simcall::COMM_IRECV:
 490         transition->mbox_remote_addr = get_mbox_remote_addr(simcall);
 491         transition->comm_remote_addr = get_comm_remote_addr(simcall);
 492         break;
 493
 494       default:
 495         break;
 496     }
 497     tr_list.emplace_back(std::move(transition));
 498   }
 499
 500   return tr_list;
 501 }
 502
 503 std::string Api::request_to_string(smx_simcall_t req, int value) const
 504 {
 505   xbt_assert(mc_model_checker != nullptr, "Must be called from MCer");
 506
 507   smx_actor_t issuer = simcall_get_issuer(req);
 508
 509   if (issuer->simcall_.observer_ != nullptr)
 510     return mc_model_checker->simcall_to_string(issuer->get_pid(), value);
 511   else
 512     return "[" + get_actor_string(issuer) + "] " + SIMIX_simcall_name(*req) + "(unknown?)";
 513 }
 514
 515 std::string Api::request_get_dot_output(smx_simcall_t req, int value) const
 516 {
 517   if (req->observer_ != nullptr) {
 518     const smx_actor_t issuer = simcall_get_issuer(req);
 519     const char* color        = get_color(issuer->get_pid() - 1);
 520     return "label = \"" + mc_model_checker->simcall_dot_label(issuer->get_pid(), value) + "\", color = " + color +
 521            ", fontcolor = " + color;
 522   } else
 523     return "UNIMPLEMENTED";
 524 }
 525
 526 #if HAVE_SMPI
 527 int Api::get_smpi_request_tag(smx_simcall_t const& simcall, simgrid::simix::Simcall type) const
 528 {
 529   void* simcall_data = nullptr;
 530   if (type == Simcall::COMM_ISEND)
 531     simcall_data = simcall_comm_isend__get__data(simcall);
 532   else if (type == Simcall::COMM_IRECV)
 533     simcall_data = simcall_comm_irecv__get__data(simcall);
 534   Remote<simgrid::smpi::Request> mpi_request;
 535   mc_model_checker->get_remote_process().read(mpi_request, remote(static_cast<smpi::Request*>(simcall_data)));
 536   return mpi_request.get_buffer()->tag();
 537 }
 538 #endif
 539
 540 void Api::restore_state(std::shared_ptr<simgrid::mc::Snapshot> system_state) const
 541 {
 542   system_state->restore(&mc_model_checker->get_remote_process());
 543 }
 544
 545 void Api::log_state() const
 546 {
 547   session_singleton->log_state();
 548 }
 549
 550 bool Api::snapshot_equal(const Snapshot* s1, const Snapshot* s2) const
 551 {
 552   return simgrid::mc::snapshot_equal(s1, s2);
 553 }
 554
 555 simgrid::mc::Snapshot* Api::take_snapshot(int num_state) const
 556 {
 557   auto snapshot = new simgrid::mc::Snapshot(num_state);
 558   return snapshot;
 559 }
 560
 561 void Api::s_close() const
 562 {
 563   session_singleton->close();
 564 }
 565
 566 void Api::execute(Transition& transition, smx_simcall_t simcall) const
 567 {
 568   /* FIXME: once all simcalls have observers, kill the simcall parameter and use mc_model_checker->simcall_to_string() */
 569   transition.textual = request_to_string(simcall, transition.times_considered_);
 570   session_singleton->execute(transition);
 571 }
 572
 573 void Api::automaton_load(const char* file) const
 574 {
 575   MC_automaton_load(file);
 576 }
 577
 578 std::vector<int> Api::automaton_propositional_symbol_evaluate() const
 579 {
 580   unsigned int cursor = 0;
 581   std::vector<int> values;
 582   xbt_automaton_propositional_symbol_t ps = nullptr;
 583   xbt_dynar_foreach (mc::property_automaton->propositional_symbols, cursor, ps)
 584     values.push_back(xbt_automaton_propositional_symbol_evaluate(ps));
 585   return values;
 586 }
 587
 588 std::vector<xbt_automaton_state_t> Api::get_automaton_state() const
 589 {
 590   std::vector<xbt_automaton_state_t> automaton_stack;
 591   unsigned int cursor = 0;
 592   xbt_automaton_state_t automaton_state;
 593   xbt_dynar_foreach (mc::property_automaton->states, cursor, automaton_state)
 594     if (automaton_state->type == -1)
 595       automaton_stack.push_back(automaton_state);
 596   return automaton_stack;
 597 }
 598
 599 int Api::compare_automaton_exp_label(const xbt_automaton_exp_label* l) const
 600 {
 601   unsigned int cursor                    = 0;
 602   xbt_automaton_propositional_symbol_t p = nullptr;
 603   xbt_dynar_foreach (simgrid::mc::property_automaton->propositional_symbols, cursor, p) {
 604     if (std::strcmp(xbt_automaton_propositional_symbol_get_name(p), l->u.predicat) == 0)
 605       return cursor;
 606   }
 607   return -1;
 608 }
 609
 610 void Api::set_property_automaton(xbt_automaton_state_t const& automaton_state) const
 611 {
 612   mc::property_automaton->current_state = automaton_state;
 613 }
 614
 615 xbt_automaton_exp_label_t Api::get_automaton_transition_label(xbt_dynar_t const& dynar, int index) const
 616 {
 617   const xbt_automaton_transition* transition = xbt_dynar_get_as(dynar, index, xbt_automaton_transition_t);
 618   return transition->label;
 619 }
 620
 621 xbt_automaton_state_t Api::get_automaton_transition_dst(xbt_dynar_t const& dynar, int index) const
 622 {
 623   const xbt_automaton_transition* transition = xbt_dynar_get_as(dynar, index, xbt_automaton_transition_t);
 624   return transition->dst;
 625 }
 626
 627 } // namespace mc
 628 } // namespace simgrid