src/mc/api.cpp

   1 #include "api.hpp"
   2
   3 #include "src/kernel/activity/MailboxImpl.hpp"
   4 #include "src/kernel/activity/MutexImpl.hpp"
   5 #include "src/mc/Session.hpp"
   6 #include "src/mc/checker/SimcallInspector.hpp"
   7 #include "src/mc/mc_comm_pattern.hpp"
   8 #include "src/mc/mc_pattern.hpp"
   9 #include "src/mc/mc_private.hpp"
  10 #include "src/mc/mc_smx.hpp"
  11
  12 #include "src/mc/remote/RemoteSimulation.hpp"
  13 #include <xbt/asserts.h>
  14 #include <xbt/log.h>
  15 #include "simgrid/s4u/Host.hpp"
  16 #include "xbt/string.hpp"
  17 #if HAVE_SMPI
  18 #include "src/smpi/include/smpi_request.hpp"
  19 #endif
  20
  21 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(Api, mc, "Logging specific to MC Facade APIs ");
  22
  23 using Simcall = simgrid::simix::Simcall;
  24
  25 namespace simgrid {
  26 namespace mc {
  27
  28 static inline const char* get_color(int id)
  29 {
  30   static constexpr std::array<const char*, 13> colors{{"blue", "red", "green3", "goldenrod", "brown", "purple",
  31                                                        "magenta", "turquoise4", "gray25", "forestgreen", "hotpink",
  32                                                        "lightblue", "tan"}};
  33   return colors[id % colors.size()];
  34 }
  35
  36 static char* pointer_to_string(void* pointer)
  37 {
  38   if (XBT_LOG_ISENABLED(Api, xbt_log_priority_verbose))
  39     return bprintf("%p", pointer);
  40
  41   return xbt_strdup("(verbose only)");
  42 }
  43
  44 static char* buff_size_to_string(size_t buff_size)
  45 {
  46   if (XBT_LOG_ISENABLED(Api, xbt_log_priority_verbose))
  47     return bprintf("%zu", buff_size);
  48
  49   return xbt_strdup("(verbose only)");
  50 }
  51
  52 /* Search an enabled transition for the given process.
  53  *
  54  * This can be seen as an iterator returning the next transition of the process.
  55  *
  56  * We only consider the processes that are both
  57  *  - marked "to be interleaved" in their ActorState (controlled by the checker algorithm).
  58  *  - which simcall can currently be executed (like a comm where the other partner is already known)
  59  * Once we returned the last enabled transition of a process, it is marked done.
  60  *
  61  * Things can get muddled with the WAITANY and TESTANY simcalls, that are rewritten on the fly to a bunch of WAIT
  62  * (resp TEST) transitions using the transition.argument field to remember what was the last returned sub-transition.
  63  */
  64 static inline smx_simcall_t MC_state_choose_request_for_process(simgrid::mc::State* state, smx_actor_t actor)
  65 {
  66   /* reset the outgoing transition */
  67   simgrid::mc::ActorState* procstate = &state->actor_states_[actor->get_pid()];
  68   state->transition_.pid_            = -1;
  69   state->transition_.argument_       = -1;
  70   state->executed_req_.call_         = Simcall::NONE;
  71
  72   if (not simgrid::mc::actor_is_enabled(actor))
  73     return nullptr; // Not executable in the application
  74
  75   smx_simcall_t req = nullptr;
  76   switch (actor->simcall_.call_) {
  77     case Simcall::COMM_WAITANY:
  78       state->transition_.argument_ = -1;
  79       while (procstate->times_considered < simcall_comm_waitany__get__count(&actor->simcall_)) {
  80         if (simgrid::mc::request_is_enabled_by_idx(&actor->simcall_, procstate->times_considered)) {
  81           state->transition_.argument_ = procstate->times_considered;
  82           ++procstate->times_considered;
  83           break;
  84         }
  85         ++procstate->times_considered;
  86       }
  87
  88       if (procstate->times_considered >= simcall_comm_waitany__get__count(&actor->simcall_))
  89         procstate->set_done();
  90       if (state->transition_.argument_ != -1)
  91         req = &actor->simcall_;
  92       break;
  93
  94     case Simcall::COMM_TESTANY: {
  95       unsigned start_count         = procstate->times_considered;
  96       state->transition_.argument_ = -1;
  97       while (procstate->times_considered < simcall_comm_testany__get__count(&actor->simcall_)) {
  98         if (simgrid::mc::request_is_enabled_by_idx(&actor->simcall_, procstate->times_considered)) {
  99           state->transition_.argument_ = procstate->times_considered;
 100           ++procstate->times_considered;
 101           break;
 102         }
 103         ++procstate->times_considered;
 104       }
 105
 106       if (procstate->times_considered >= simcall_comm_testany__get__count(&actor->simcall_))
 107         procstate->set_done();
 108
 109       if (state->transition_.argument_ != -1 || start_count == 0)
 110         req = &actor->simcall_;
 111
 112       break;
 113     }
 114
 115     case Simcall::COMM_WAIT: {
 116       simgrid::mc::RemotePtr<simgrid::kernel::activity::CommImpl> remote_act =
 117           remote(simcall_comm_wait__getraw__comm(&actor->simcall_));
 118       simgrid::mc::Remote<simgrid::kernel::activity::CommImpl> temp_act;
 119       mc_model_checker->get_remote_simulation().read(temp_act, remote_act);
 120       const simgrid::kernel::activity::CommImpl* act = temp_act.get_buffer();
 121       if (act->src_actor_.get() && act->dst_actor_.get())
 122         state->transition_.argument_ = 0; // OK
 123       else if (act->src_actor_.get() == nullptr && act->state_ == simgrid::kernel::activity::State::READY &&
 124                act->detached())
 125         state->transition_.argument_ = 0; // OK
 126       else
 127         state->transition_.argument_ = -1; // timeout
 128       procstate->set_done();
 129       req = &actor->simcall_;
 130       break;
 131     }
 132
 133     case Simcall::MC_RANDOM: {
 134       int min_value                = simcall_mc_random__get__min(&actor->simcall_);
 135       state->transition_.argument_ = procstate->times_considered + min_value;
 136       procstate->times_considered++;
 137       if (state->transition_.argument_ == simcall_mc_random__get__max(&actor->simcall_))
 138         procstate->set_done();
 139       req = &actor->simcall_;
 140       break;
 141     }
 142
 143     default:
 144       procstate->set_done();
 145       state->transition_.argument_ = 0;
 146       req                          = &actor->simcall_;
 147       break;
 148   }
 149   if (not req)
 150     return nullptr;
 151
 152   state->transition_.pid_ = actor->get_pid();
 153   state->executed_req_    = *req;
 154   // Fetch the data of the request and translate it:
 155   state->internal_req_ = *req;
 156
 157   /* The waitany and testany request are transformed into a wait or test request over the corresponding communication
 158    * action so it can be treated later by the dependence function. */
 159   switch (req->call_) {
 160     case Simcall::COMM_WAITANY: {
 161       state->internal_req_.call_ = Simcall::COMM_WAIT;
 162       simgrid::kernel::activity::CommImpl* remote_comm;
 163       remote_comm = mc_model_checker->get_remote_simulation().read(
 164           remote(simcall_comm_waitany__get__comms(req) + state->transition_.argument_));
 165       mc_model_checker->get_remote_simulation().read(state->internal_comm_, remote(remote_comm));
 166       simcall_comm_wait__set__comm(&state->internal_req_, state->internal_comm_.get_buffer());
 167       simcall_comm_wait__set__timeout(&state->internal_req_, 0);
 168       break;
 169     }
 170
 171     case Simcall::COMM_TESTANY:
 172       state->internal_req_.call_ = Simcall::COMM_TEST;
 173
 174       if (state->transition_.argument_ > 0) {
 175         simgrid::kernel::activity::CommImpl* remote_comm = mc_model_checker->get_remote_simulation().read(
 176             remote(simcall_comm_testany__get__comms(req) + state->transition_.argument_));
 177         mc_model_checker->get_remote_simulation().read(state->internal_comm_, remote(remote_comm));
 178       }
 179
 180       simcall_comm_test__set__comm(&state->internal_req_, state->internal_comm_.get_buffer());
 181       simcall_comm_test__set__result(&state->internal_req_, state->transition_.argument_);
 182       break;
 183
 184     case Simcall::COMM_WAIT:
 185       mc_model_checker->get_remote_simulation().read_bytes(&state->internal_comm_, sizeof(state->internal_comm_),
 186                                                            remote(simcall_comm_wait__getraw__comm(req)));
 187       simcall_comm_wait__set__comm(&state->executed_req_, state->internal_comm_.get_buffer());
 188       simcall_comm_wait__set__comm(&state->internal_req_, state->internal_comm_.get_buffer());
 189       break;
 190
 191     case Simcall::COMM_TEST:
 192       mc_model_checker->get_remote_simulation().read_bytes(&state->internal_comm_, sizeof(state->internal_comm_),
 193                                                            remote(simcall_comm_test__getraw__comm(req)));
 194       simcall_comm_test__set__comm(&state->executed_req_, state->internal_comm_.get_buffer());
 195       simcall_comm_test__set__comm(&state->internal_req_, state->internal_comm_.get_buffer());
 196       break;
 197
 198     default:
 199       /* No translation needed */
 200       break;
 201   }
 202
 203   return req;
 204 }
 205
 206 simgrid::kernel::activity::CommImpl* Api::get_comm(smx_simcall_t const r) const
 207 {
 208   switch (r->call_) {
 209     case Simcall::COMM_WAIT:
 210       return simcall_comm_wait__getraw__comm(r);
 211     case Simcall::COMM_TEST:
 212       return simcall_comm_test__getraw__comm(r);
 213     default:
 214       return nullptr;
 215   }
 216 }
 217
 218 /** Statically "upcast" a s_smx_actor_t into an ActorInformation
 219  *
 220  *  This gets 'actorInfo' from '&actorInfo->copy'. It upcasts in the
 221  *  sense that we could achieve the same thing by having ActorInformation
 222  *  inherit from s_smx_actor_t but we don't really want to do that.
 223  */
 224 simgrid::mc::ActorInformation* Api::actor_info_cast(smx_actor_t actor) const
 225 {
 226   simgrid::mc::ActorInformation temp;
 227   std::size_t offset = (char*)temp.copy.get_buffer() - (char*)&temp;
 228
 229   auto* process_info = reinterpret_cast<simgrid::mc::ActorInformation*>((char*)actor - offset);
 230   return process_info;
 231 }
 232
 233 // Does half the job
 234 bool Api::request_depend_asymmetric(smx_simcall_t r1, smx_simcall_t r2) const
 235 {
 236   if (r1->call_ == Simcall::COMM_ISEND && r2->call_ == Simcall::COMM_IRECV)
 237     return false;
 238
 239   if (r1->call_ == Simcall::COMM_IRECV && r2->call_ == Simcall::COMM_ISEND)
 240     return false;
 241
 242   // Those are internal requests, we do not need indirection because those objects are copies:
 243   const kernel::activity::CommImpl* synchro1 = get_comm(r1);
 244   const kernel::activity::CommImpl* synchro2 = get_comm(r2);
 245
 246   if ((r1->call_ == Simcall::COMM_ISEND || r1->call_ == Simcall::COMM_IRECV) && r2->call_ == Simcall::COMM_WAIT) {
 247     auto mbox                                                  = get_mbox_remote_addr(r1);
 248     RemotePtr<kernel::activity::MailboxImpl> synchro2_mbox_cpy = remote(synchro2->mbox_cpy);
 249
 250     if (mbox != synchro2_mbox_cpy && simcall_comm_wait__get__timeout(r2) <= 0)
 251       return false;
 252
 253     if ((r1->issuer_ != synchro2->src_actor_.get()) && (r1->issuer_ != synchro2->dst_actor_.get()) &&
 254         simcall_comm_wait__get__timeout(r2) <= 0)
 255       return false;
 256
 257     if ((r1->call_ == Simcall::COMM_ISEND) && (synchro2->type_ == kernel::activity::CommImpl::Type::SEND) &&
 258         (synchro2->src_buff_ != simcall_comm_isend__get__src_buff(r1)) && simcall_comm_wait__get__timeout(r2) <= 0)
 259       return false;
 260
 261     if ((r1->call_ == Simcall::COMM_IRECV) && (synchro2->type_ == kernel::activity::CommImpl::Type::RECEIVE) &&
 262         (synchro2->dst_buff_ != simcall_comm_irecv__get__dst_buff(r1)) && simcall_comm_wait__get__timeout(r2) <= 0)
 263       return false;
 264   }
 265
 266   /* FIXME: the following rule assumes that the result of the isend/irecv call is not stored in a buffer used in the
 267    * test call. */
 268 #if 0
 269   if((r1->call == Simcall::COMM_ISEND || r1->call == Simcall::COMM_IRECV)
 270       &&  r2->call == Simcall::COMM_TEST)
 271     return false;
 272 #endif
 273
 274   if (r1->call_ == Simcall::COMM_WAIT && (r2->call_ == Simcall::COMM_WAIT || r2->call_ == Simcall::COMM_TEST) &&
 275       (synchro1->src_actor_.get() == nullptr || synchro1->dst_actor_.get() == nullptr))
 276     return false;
 277
 278   if (r1->call_ == Simcall::COMM_TEST &&
 279       (simcall_comm_test__get__comm(r1) == nullptr || synchro1->src_buff_ == nullptr || synchro1->dst_buff_ == nullptr))
 280     return false;
 281
 282   if (r1->call_ == Simcall::COMM_TEST && r2->call_ == Simcall::COMM_WAIT &&
 283       synchro1->src_buff_ == synchro2->src_buff_ && synchro1->dst_buff_ == synchro2->dst_buff_)
 284     return false;
 285
 286   if (r1->call_ == Simcall::COMM_WAIT && r2->call_ == Simcall::COMM_TEST && synchro1->src_buff_ != nullptr &&
 287       synchro1->dst_buff_ != nullptr && synchro2->src_buff_ != nullptr && synchro2->dst_buff_ != nullptr &&
 288       synchro1->dst_buff_ != synchro2->src_buff_ && synchro1->dst_buff_ != synchro2->dst_buff_ &&
 289       synchro2->dst_buff_ != synchro1->src_buff_)
 290     return false;
 291
 292   return true;
 293 }
 294
 295 const char* Api::actor_get_host_name(smx_actor_t actor) const
 296 {
 297   if (mc_model_checker == nullptr)
 298     return actor->get_host()->get_cname();
 299
 300   const simgrid::mc::RemoteSimulation* process = &mc_model_checker->get_remote_simulation();
 301
 302   // Read the simgrid::xbt::string in the MCed process:
 303   simgrid::mc::ActorInformation* info = actor_info_cast(actor);
 304   auto remote_string_address =
 305       remote(reinterpret_cast<const simgrid::xbt::string_data*>(&actor->get_host()->get_name()));
 306   simgrid::xbt::string_data remote_string = process->read(remote_string_address);
 307   std::vector<char> hostname(remote_string.len + 1);
 308   // no need to read the terminating null byte, and thus hostname[remote_string.len] is guaranteed to be '\0'
 309   process->read_bytes(hostname.data(), remote_string.len, remote(remote_string.data));
 310   info->hostname = mc_model_checker->get_host_name(hostname.data()).c_str();
 311   return info->hostname;
 312 }
 313
 314 const char* Api::actor_get_name(smx_actor_t actor) const
 315 {
 316   if (mc_model_checker == nullptr)
 317     return actor->get_cname();
 318
 319   const simgrid::mc::RemoteSimulation* process = &mc_model_checker->get_remote_simulation();
 320
 321   simgrid::mc::ActorInformation* info = actor_info_cast(actor);
 322   if (info->name.empty()) {
 323     simgrid::xbt::string_data string_data = simgrid::xbt::string::to_string_data(actor->name_);
 324     info->name = process->read_string(remote(string_data.data), string_data.len);
 325   }
 326   return info->name.c_str();
 327 }
 328
 329 void Api::initialize(char** argv) const
 330 {
 331   simgrid::mc::session = new simgrid::mc::Session([argv] {
 332     int i = 1;
 333     while (argv[i] != nullptr && argv[i][0] == '-')
 334       i++;
 335     xbt_assert(argv[i] != nullptr,
 336                "Unable to find a binary to exec on the command line. Did you only pass config flags?");
 337     execvp(argv[i], argv + i);
 338     xbt_die("The model-checked process failed to exec(): %s", strerror(errno));
 339   });
 340 }
 341
 342 std::vector<simgrid::mc::ActorInformation>& Api::get_actors() const
 343 {
 344   return mc_model_checker->get_remote_simulation().actors();
 345 }
 346
 347 bool Api::actor_is_enabled(aid_t pid) const
 348 {
 349   return session->actor_is_enabled(pid);
 350 }
 351
 352 unsigned long Api::get_maxpid() const
 353 {
 354   return MC_smx_get_maxpid();
 355 }
 356
 357 int Api::get_actors_size() const
 358 {
 359   return mc_model_checker->get_remote_simulation().actors().size();
 360 }
 361
 362 RemotePtr<kernel::activity::CommImpl> Api::get_comm_isend_raw_addr(smx_simcall_t request) const
 363 {
 364   auto comm_addr = simgrid::simix::unmarshal_raw<simgrid::kernel::activity::ActivityImpl*>(request->result_);
 365   return RemotePtr<kernel::activity::CommImpl>(static_cast<kernel::activity::CommImpl*>(comm_addr));
 366 }
 367
 368 RemotePtr<kernel::activity::CommImpl> Api::get_comm_irecv_raw_addr(smx_simcall_t request) const
 369 {
 370   auto comm_addr = simgrid::simix::unmarshal_raw<simgrid::kernel::activity::ActivityImpl*>(request->result_);
 371   return RemotePtr<kernel::activity::CommImpl>(static_cast<kernel::activity::CommImpl*>(comm_addr));
 372 }
 373
 374 RemotePtr<kernel::activity::CommImpl> Api::get_comm_wait_raw_addr(smx_simcall_t request) const
 375 {
 376   auto comm_addr = simgrid::simix::unmarshal_raw<simgrid::kernel::activity::CommImpl*>(request->args_[0]);
 377   return RemotePtr<kernel::activity::CommImpl>(static_cast<kernel::activity::CommImpl*>(comm_addr));
 378 }
 379
 380 RemotePtr<kernel::activity::CommImpl> Api::get_comm_waitany_raw_addr(smx_simcall_t request, int value) const
 381 {
 382   auto addr      = simgrid::simix::unmarshal_raw<simgrid::kernel::activity::CommImpl**>(request->args_[0]) + value;
 383   auto comm_addr = mc_model_checker->get_remote_simulation().read(remote(addr));
 384   return RemotePtr<kernel::activity::CommImpl>(static_cast<kernel::activity::CommImpl*>(comm_addr));
 385 }
 386
 387 std::string Api::get_pattern_comm_rdv(RemotePtr<kernel::activity::CommImpl> const& addr) const
 388 {
 389   Remote<kernel::activity::CommImpl> temp_synchro;
 390   mc_model_checker->get_remote_simulation().read(temp_synchro, addr);
 391   const kernel::activity::CommImpl* synchro = temp_synchro.get_buffer();
 392
 393   char* remote_name = mc_model_checker->get_remote_simulation().read<char*>(RemotePtr<char*>(
 394       (uint64_t)(synchro->get_mailbox() ? &synchro->get_mailbox()->get_name() : &synchro->mbox_cpy->get_name())));
 395   auto rdv          = mc_model_checker->get_remote_simulation().read_string(RemotePtr<char>(remote_name));
 396   return rdv;
 397 }
 398
 399 unsigned long Api::get_pattern_comm_src_proc(RemotePtr<kernel::activity::CommImpl> const& addr) const
 400 {
 401   Remote<kernel::activity::CommImpl> temp_synchro;
 402   mc_model_checker->get_remote_simulation().read(temp_synchro, addr);
 403   const kernel::activity::CommImpl* synchro = temp_synchro.get_buffer();
 404   auto src_proc =
 405       mc_model_checker->get_remote_simulation().resolve_actor(mc::remote(synchro->src_actor_.get()))->get_pid();
 406   return src_proc;
 407 }
 408
 409 unsigned long Api::get_pattern_comm_dst_proc(RemotePtr<kernel::activity::CommImpl> const& addr) const
 410 {
 411   Remote<kernel::activity::CommImpl> temp_synchro;
 412   mc_model_checker->get_remote_simulation().read(temp_synchro, addr);
 413   const kernel::activity::CommImpl* synchro = temp_synchro.get_buffer();
 414   auto src_proc =
 415       mc_model_checker->get_remote_simulation().resolve_actor(mc::remote(synchro->dst_actor_.get()))->get_pid();
 416   return src_proc;
 417 }
 418
 419 std::vector<char> Api::get_pattern_comm_data(RemotePtr<kernel::activity::CommImpl> const& addr) const
 420 {
 421   simgrid::mc::Remote<simgrid::kernel::activity::CommImpl> temp_comm;
 422   mc_model_checker->get_remote_simulation().read(temp_comm, addr);
 423   const simgrid::kernel::activity::CommImpl* comm = temp_comm.get_buffer();
 424
 425   std::vector<char> buffer{};
 426   if (comm->src_buff_ != nullptr) {
 427     buffer.resize(comm->src_buff_size_);
 428     mc_model_checker->get_remote_simulation().read_bytes(buffer.data(), buffer.size(), remote(comm->src_buff_));
 429   }
 430   return buffer;
 431 }
 432
 433 const char* Api::get_actor_host_name(smx_actor_t actor) const
 434 {
 435   const char* host_name = actor_get_host_name(actor);
 436   return host_name;
 437 }
 438
 439 #if HAVE_SMPI
 440 bool Api::check_send_request_detached(smx_simcall_t const& simcall) const
 441 {
 442   simgrid::smpi::Request mpi_request;
 443   mc_model_checker->get_remote_simulation().read(
 444       &mpi_request, remote(static_cast<smpi::Request*>(simcall_comm_isend__get__data(simcall))));
 445   return mpi_request.detached();
 446 }
 447 #endif
 448
 449 smx_actor_t Api::get_src_actor(RemotePtr<kernel::activity::CommImpl> const& comm_addr) const
 450 {
 451   simgrid::mc::Remote<simgrid::kernel::activity::CommImpl> temp_comm;
 452   mc_model_checker->get_remote_simulation().read(temp_comm, comm_addr);
 453   const simgrid::kernel::activity::CommImpl* comm = temp_comm.get_buffer();
 454
 455   auto src_proc = mc_model_checker->get_remote_simulation().resolve_actor(simgrid::mc::remote(comm->src_actor_.get()));
 456   return src_proc;
 457 }
 458
 459 smx_actor_t Api::get_dst_actor(RemotePtr<kernel::activity::CommImpl> const& comm_addr) const
 460 {
 461   simgrid::mc::Remote<simgrid::kernel::activity::CommImpl> temp_comm;
 462   mc_model_checker->get_remote_simulation().read(temp_comm, comm_addr);
 463   const simgrid::kernel::activity::CommImpl* comm = temp_comm.get_buffer();
 464
 465   auto dst_proc = mc_model_checker->get_remote_simulation().resolve_actor(simgrid::mc::remote(comm->dst_actor_.get()));
 466   return dst_proc;
 467 }
 468
 469 std::size_t Api::get_remote_heap_bytes() const
 470 {
 471   RemoteSimulation& process = mc_model_checker->get_remote_simulation();
 472   auto heap_bytes_used      = mmalloc_get_bytes_used_remote(process.get_heap()->heaplimit, process.get_malloc_info());
 473   return heap_bytes_used;
 474 }
 475
 476 void Api::session_initialize() const
 477 {
 478   session->initialize();
 479 }
 480
 481 void Api::mc_inc_visited_states() const
 482 {
 483   mc_model_checker->visited_states++;
 484 }
 485
 486 void Api::mc_inc_executed_trans() const
 487 {
 488   mc_model_checker->executed_transitions++;
 489 }
 490
 491 unsigned long Api::mc_get_visited_states() const
 492 {
 493   return mc_model_checker->visited_states;
 494 }
 495
 496 unsigned long Api::mc_get_executed_trans() const
 497 {
 498   return mc_model_checker->executed_transitions;
 499 }
 500
 501 bool Api::mc_check_deadlock() const
 502 {
 503   return mc_model_checker->checkDeadlock();
 504 }
 505
 506 void Api::mc_show_deadlock() const
 507 {
 508   MC_show_deadlock();
 509 }
 510
 511 /** Get the issuer of a simcall (`req->issuer`)
 512  *
 513  *  In split-process mode, it does the black magic necessary to get an address
 514  *  of a (shallow) copy of the data structure the issuer SIMIX actor in the local
 515  *  address space.
 516  *
 517  *  @param process the MCed process
 518  *  @param req     the simcall (copied in the local process)
 519  */
 520 smx_actor_t Api::simcall_get_issuer(s_smx_simcall const* req) const
 521 {
 522   xbt_assert(mc_model_checker != nullptr);
 523
 524   // This is the address of the smx_actor in the MCed process:
 525   auto address = simgrid::mc::remote(req->issuer_);
 526
 527   // Lookup by address:
 528   for (auto& actor : mc_model_checker->get_remote_simulation().actors())
 529     if (actor.address == address)
 530       return actor.copy.get_buffer();
 531   for (auto& actor : mc_model_checker->get_remote_simulation().dead_actors())
 532     if (actor.address == address)
 533       return actor.copy.get_buffer();
 534
 535   xbt_die("Issuer not found");
 536 }
 537
 538 long Api::simcall_get_actor_id(s_smx_simcall const* req) const
 539 {
 540   return simcall_get_issuer(req)->get_pid();
 541 }
 542
 543 RemotePtr<kernel::activity::MailboxImpl> Api::get_mbox_remote_addr(smx_simcall_t const req) const
 544 {
 545   RemotePtr<kernel::activity::MailboxImpl> mbox_addr;
 546   switch (req->call_) {
 547     case Simcall::COMM_ISEND:
 548     case Simcall::COMM_IRECV: {
 549       auto mbox_addr_ptr = simix::unmarshal<smx_mailbox_t>(req->args_[1]);
 550       mbox_addr          = remote(mbox_addr_ptr);
 551       break;
 552     }
 553     default:
 554       mbox_addr = RemotePtr<kernel::activity::MailboxImpl>();
 555       break;
 556   }
 557   return mbox_addr;
 558 }
 559
 560 RemotePtr<kernel::activity::ActivityImpl> Api::get_comm_remote_addr(smx_simcall_t const req) const
 561 {
 562   RemotePtr<kernel::activity::ActivityImpl> comm_addr;
 563   switch (req->call_) {
 564     case Simcall::COMM_ISEND:
 565     case Simcall::COMM_IRECV: {
 566       auto comm_addr_ptr = simgrid::simix::unmarshal_raw<simgrid::kernel::activity::ActivityImpl*>(req->result_);
 567       comm_addr          = remote(comm_addr_ptr);
 568       break;
 569     }
 570     default:
 571       comm_addr = RemotePtr<kernel::activity::ActivityImpl>();
 572       break;
 573   }
 574   return comm_addr;
 575 }
 576
 577 bool Api::mc_is_null() const
 578 {
 579   auto is_null = (mc_model_checker == nullptr) ? true : false;
 580   return is_null;
 581 }
 582
 583 Checker* Api::mc_get_checker() const
 584 {
 585   return mc_model_checker->getChecker();
 586 }
 587
 588 void Api::set_checker(Checker* const checker) const
 589 {
 590   xbt_assert(mc_model_checker);
 591   xbt_assert(mc_model_checker->getChecker() == nullptr);
 592   mc_model_checker->setChecker(checker);
 593 }
 594
 595 void Api::handle_simcall(Transition const& transition) const
 596 {
 597   mc_model_checker->handle_simcall(transition);
 598 }
 599
 600 void Api::mc_wait_for_requests() const
 601 {
 602   mc_model_checker->wait_for_requests();
 603 }
 604
 605 void Api::mc_exit(int status) const
 606 {
 607   mc_model_checker->exit(status);
 608 }
 609
 610 std::string const& Api::mc_get_host_name(std::string const& hostname) const
 611 {
 612   return mc_model_checker->get_host_name(hostname);
 613 }
 614
 615 void Api::dump_record_path() const
 616 {
 617   simgrid::mc::dumpRecordPath();
 618 }
 619
 620 smx_simcall_t Api::mc_state_choose_request(simgrid::mc::State* state) const
 621 {
 622   for (auto& actor : mc_model_checker->get_remote_simulation().actors()) {
 623     /* Only consider the actors that were marked as interleaving by the checker algorithm */
 624     if (not state->actor_states_[actor.copy.get_buffer()->get_pid()].is_todo())
 625       continue;
 626
 627     smx_simcall_t res = MC_state_choose_request_for_process(state, actor.copy.get_buffer());
 628     if (res)
 629       return res;
 630   }
 631   return nullptr;
 632 }
 633
 634 std::list<transition_detail_t> Api::get_enabled_transitions(simgrid::mc::State* state)
 635 {
 636   std::list<transition_detail_t> tr_list{};
 637
 638   for (auto& actor : mc_model_checker->get_remote_simulation().actors()) {
 639     auto actor_pid  = actor.copy.get_buffer()->get_pid();
 640     auto actor_impl = actor.copy.get_buffer();
 641
 642     // Only consider the actors that were marked as interleaving by the checker algorithm
 643     if (not state->actor_states_[actor_pid].is_todo())
 644       continue;
 645     // Not executable in the application
 646     if (not simgrid::mc::actor_is_enabled(actor_impl))
 647       continue;
 648
 649     transition_detail_t transition = std::unique_ptr<s_transition_detail>(new s_transition_detail());
 650     Simcall simcall_call                = actor_impl->simcall_.call_;
 651     smx_simcall_t simcall               = &actor_impl->simcall_;
 652     transition->call_             = simcall_call;
 653     switch (simcall_call) {
 654       case Simcall::COMM_ISEND:
 655       case Simcall::COMM_IRECV: {
 656         transition->mbox_remote_addr = get_mbox_remote_addr(simcall);
 657         transition->comm_remote_addr = get_comm_remote_addr(simcall);
 658         break;
 659       }
 660
 661       default:
 662         break;
 663     }
 664     tr_list.emplace_back(std::move(transition));
 665   }
 666
 667   return tr_list;
 668 }
 669
 670 bool Api::simcall_check_dependency(smx_simcall_t const req1, smx_simcall_t const req2) const
 671 {
 672   if (req1->issuer_ == req2->issuer_)
 673     return false;
 674
 675   /* Wait with timeout transitions are not considered by the independence theorem, thus we consider them as dependent
 676    * with all other transitions */
 677   if ((req1->call_ == Simcall::COMM_WAIT && simcall_comm_wait__get__timeout(req1) > 0) ||
 678       (req2->call_ == Simcall::COMM_WAIT && simcall_comm_wait__get__timeout(req2) > 0))
 679     return true;
 680
 681   if (req1->call_ != req2->call_)
 682     return request_depend_asymmetric(req1, req2) && request_depend_asymmetric(req2, req1);
 683
 684   // Those are internal requests, we do not need indirection because those objects are copies:
 685   const kernel::activity::CommImpl* synchro1 = get_comm(req1);
 686   const kernel::activity::CommImpl* synchro2 = get_comm(req2);
 687
 688   switch (req1->call_) {
 689     case Simcall::COMM_ISEND:
 690       return simcall_comm_isend__get__mbox(req1) == simcall_comm_isend__get__mbox(req2);
 691     case Simcall::COMM_IRECV:
 692       return simcall_comm_irecv__get__mbox(req1) == simcall_comm_irecv__get__mbox(req2);
 693     case Simcall::COMM_WAIT:
 694       if (synchro1->src_buff_ == synchro2->src_buff_ && synchro1->dst_buff_ == synchro2->dst_buff_)
 695         return false;
 696       if (synchro1->src_buff_ != nullptr && synchro1->dst_buff_ != nullptr && synchro2->src_buff_ != nullptr &&
 697           synchro2->dst_buff_ != nullptr && synchro1->dst_buff_ != synchro2->src_buff_ &&
 698           synchro1->dst_buff_ != synchro2->dst_buff_ && synchro2->dst_buff_ != synchro1->src_buff_)
 699         return false;
 700       return true;
 701     default:
 702       return true;
 703   }
 704 }
 705
 706 std::string Api::request_to_string(smx_simcall_t req, int value, RequestType request_type) const
 707 {
 708   xbt_assert(mc_model_checker != nullptr, "Must be called from MCer");
 709
 710   if (req->inspector_ != nullptr)
 711     return req->inspector_->to_string();
 712
 713   bool use_remote_comm = true;
 714   switch (request_type) {
 715     case simgrid::mc::RequestType::simix:
 716       use_remote_comm = true;
 717       break;
 718     case simgrid::mc::RequestType::executed:
 719     case simgrid::mc::RequestType::internal:
 720       use_remote_comm = false;
 721       break;
 722     default:
 723       THROW_IMPOSSIBLE;
 724   }
 725
 726   const char* type = nullptr;
 727   char* args       = nullptr;
 728
 729   smx_actor_t issuer = simcall_get_issuer(req);
 730
 731   switch (req->call_) {
 732     case Simcall::COMM_ISEND: {
 733       type     = "iSend";
 734       char* p  = pointer_to_string(simcall_comm_isend__get__src_buff(req));
 735       char* bs = buff_size_to_string(simcall_comm_isend__get__src_buff_size(req));
 736       if (issuer->get_host())
 737         args = bprintf("src=(%ld)%s (%s), buff=%s, size=%s", issuer->get_pid(), actor_get_host_name(issuer),
 738                        actor_get_name(issuer), p, bs);
 739       else
 740         args = bprintf("src=(%ld)%s, buff=%s, size=%s", issuer->get_pid(), actor_get_name(issuer), p, bs);
 741       xbt_free(bs);
 742       xbt_free(p);
 743       break;
 744     }
 745
 746     case Simcall::COMM_IRECV: {
 747       size_t* remote_size = simcall_comm_irecv__get__dst_buff_size(req);
 748       size_t size         = 0;
 749       if (remote_size)
 750         mc_model_checker->get_remote_simulation().read_bytes(&size, sizeof(size), remote(remote_size));
 751
 752       type     = "iRecv";
 753       char* p  = pointer_to_string(simcall_comm_irecv__get__dst_buff(req));
 754       char* bs = buff_size_to_string(size);
 755       if (issuer->get_host())
 756         args = bprintf("dst=(%ld)%s (%s), buff=%s, size=%s", issuer->get_pid(), actor_get_host_name(issuer),
 757                        actor_get_name(issuer), p, bs);
 758       else
 759         args = bprintf("dst=(%ld)%s, buff=%s, size=%s", issuer->get_pid(), actor_get_name(issuer), p, bs);
 760       xbt_free(bs);
 761       xbt_free(p);
 762       break;
 763     }
 764
 765     case Simcall::COMM_WAIT: {
 766       simgrid::kernel::activity::CommImpl* remote_act = simcall_comm_wait__getraw__comm(req);
 767       char* p;
 768       if (value == -1) {
 769         type = "WaitTimeout";
 770         p    = pointer_to_string(remote_act);
 771         args = bprintf("comm=%s", p);
 772       } else {
 773         type = "Wait";
 774         p    = pointer_to_string(remote_act);
 775
 776         simgrid::mc::Remote<simgrid::kernel::activity::CommImpl> temp_synchro;
 777         const simgrid::kernel::activity::CommImpl* act;
 778         if (use_remote_comm) {
 779           mc_model_checker->get_remote_simulation().read(temp_synchro, remote(remote_act));
 780           act = temp_synchro.get_buffer();
 781         } else
 782           act = remote_act;
 783
 784         smx_actor_t src_proc =
 785             mc_model_checker->get_remote_simulation().resolve_actor(simgrid::mc::remote(act->src_actor_.get()));
 786         smx_actor_t dst_proc =
 787             mc_model_checker->get_remote_simulation().resolve_actor(simgrid::mc::remote(act->dst_actor_.get()));
 788         args = bprintf("comm=%s [(%ld)%s (%s)-> (%ld)%s (%s)]", p, src_proc ? src_proc->get_pid() : 0,
 789                        src_proc ? actor_get_host_name(src_proc) : "",
 790                        src_proc ? actor_get_name(src_proc) : "", dst_proc ? dst_proc->get_pid() : 0,
 791                        dst_proc ? actor_get_host_name(dst_proc) : "",
 792                        dst_proc ? actor_get_name(dst_proc) : "");
 793       }
 794       xbt_free(p);
 795       break;
 796     }
 797
 798     case Simcall::COMM_TEST: {
 799       simgrid::kernel::activity::CommImpl* remote_act = simcall_comm_test__getraw__comm(req);
 800       simgrid::mc::Remote<simgrid::kernel::activity::CommImpl> temp_synchro;
 801       const simgrid::kernel::activity::CommImpl* act;
 802       if (use_remote_comm) {
 803         mc_model_checker->get_remote_simulation().read(temp_synchro, remote(remote_act));
 804         act = temp_synchro.get_buffer();
 805       } else
 806         act = remote_act;
 807
 808       char* p;
 809       if (act->src_actor_.get() == nullptr || act->dst_actor_.get() == nullptr) {
 810         type = "Test FALSE";
 811         p    = pointer_to_string(remote_act);
 812         args = bprintf("comm=%s", p);
 813       } else {
 814         type = "Test TRUE";
 815         p    = pointer_to_string(remote_act);
 816
 817         smx_actor_t src_proc =
 818             mc_model_checker->get_remote_simulation().resolve_actor(simgrid::mc::remote(act->src_actor_.get()));
 819         smx_actor_t dst_proc =
 820             mc_model_checker->get_remote_simulation().resolve_actor(simgrid::mc::remote(act->dst_actor_.get()));
 821         args = bprintf("comm=%s [(%ld)%s (%s) -> (%ld)%s (%s)]", p, src_proc->get_pid(),
 822                        actor_get_name(src_proc), actor_get_host_name(src_proc), dst_proc->get_pid(),
 823                        actor_get_name(dst_proc), actor_get_host_name(dst_proc));
 824       }
 825       xbt_free(p);
 826       break;
 827     }
 828
 829     case Simcall::COMM_WAITANY: {
 830       type         = "WaitAny";
 831       size_t count = simcall_comm_waitany__get__count(req);
 832       if (count > 0) {
 833         simgrid::kernel::activity::CommImpl* remote_sync;
 834         remote_sync =
 835             mc_model_checker->get_remote_simulation().read(remote(simcall_comm_waitany__get__comms(req) + value));
 836         char* p = pointer_to_string(remote_sync);
 837         args    = bprintf("comm=%s (%d of %zu)", p, value + 1, count);
 838         xbt_free(p);
 839       } else
 840         args = bprintf("comm at idx %d", value);
 841       break;
 842     }
 843
 844     case Simcall::COMM_TESTANY:
 845       if (value == -1) {
 846         type = "TestAny FALSE";
 847         args = xbt_strdup("-");
 848       } else {
 849         type = "TestAny";
 850         args = bprintf("(%d of %zu)", value + 1, simcall_comm_testany__get__count(req));
 851       }
 852       break;
 853
 854     case Simcall::MUTEX_TRYLOCK:
 855     case Simcall::MUTEX_LOCK: {
 856       if (req->call_ == Simcall::MUTEX_LOCK)
 857         type = "Mutex LOCK";
 858       else
 859         type = "Mutex TRYLOCK";
 860
 861       simgrid::mc::Remote<simgrid::kernel::activity::MutexImpl> mutex;
 862       mc_model_checker->get_remote_simulation().read_bytes(mutex.get_buffer(), sizeof(mutex),
 863                                                            remote(req->call_ == Simcall::MUTEX_LOCK
 864                                                                       ? simcall_mutex_lock__get__mutex(req)
 865                                                                       : simcall_mutex_trylock__get__mutex(req)));
 866       args = bprintf("locked = %d, owner = %d, sleeping = n/a", mutex.get_buffer()->is_locked(),
 867                      mutex.get_buffer()->get_owner() != nullptr
 868                          ? (int)mc_model_checker->get_remote_simulation()
 869                                .resolve_actor(simgrid::mc::remote(mutex.get_buffer()->get_owner()))
 870                                ->get_pid()
 871                          : -1);
 872       break;
 873     }
 874
 875     case Simcall::MC_RANDOM:
 876       type = "MC_RANDOM";
 877       args = bprintf("%d", value);
 878       break;
 879
 880     default:
 881       type = SIMIX_simcall_name(req->call_);
 882       args = bprintf("??");
 883       break;
 884   }
 885
 886   std::string str;
 887   if (args != nullptr)
 888     str = simgrid::xbt::string_printf("[(%ld)%s (%s)] %s(%s)", issuer->get_pid(), actor_get_host_name(issuer),
 889                                       actor_get_name(issuer), type, args);
 890   else
 891     str = simgrid::xbt::string_printf("[(%ld)%s (%s)] %s ", issuer->get_pid(), actor_get_host_name(issuer),
 892                                       actor_get_name(issuer), type);
 893   xbt_free(args);
 894   return str;
 895 }
 896
 897 std::string Api::request_get_dot_output(smx_simcall_t req, int value) const
 898 {
 899   const smx_actor_t issuer = simcall_get_issuer(req);
 900   const char* color        = get_color(issuer->get_pid() - 1);
 901
 902   if (req->inspector_ != nullptr)
 903     return simgrid::xbt::string_printf("label = \"%s\", color = %s, fontcolor = %s",
 904                                        req->inspector_->dot_label().c_str(), color, color);
 905
 906   std::string label;
 907
 908   switch (req->call_) {
 909     case Simcall::COMM_ISEND:
 910       if (issuer->get_host())
 911         label = xbt::string_printf("[(%ld)%s] iSend", issuer->get_pid(), actor_get_host_name(issuer));
 912       else
 913         label = bprintf("[(%ld)] iSend", issuer->get_pid());
 914       break;
 915
 916     case Simcall::COMM_IRECV:
 917       if (issuer->get_host())
 918         label = xbt::string_printf("[(%ld)%s] iRecv", issuer->get_pid(), actor_get_host_name(issuer));
 919       else
 920         label = xbt::string_printf("[(%ld)] iRecv", issuer->get_pid());
 921       break;
 922
 923     case Simcall::COMM_WAIT:
 924       if (value == -1) {
 925         if (issuer->get_host())
 926           label = xbt::string_printf("[(%ld)%s] WaitTimeout", issuer->get_pid(), actor_get_host_name(issuer));
 927         else
 928           label = xbt::string_printf("[(%ld)] WaitTimeout", issuer->get_pid());
 929       } else {
 930         kernel::activity::ActivityImpl* remote_act = simcall_comm_wait__getraw__comm(req);
 931         Remote<kernel::activity::CommImpl> temp_comm;
 932         mc_model_checker->get_remote_simulation().read(temp_comm,
 933                                                        remote(static_cast<kernel::activity::CommImpl*>(remote_act)));
 934         const kernel::activity::CommImpl* comm = temp_comm.get_buffer();
 935
 936         const kernel::actor::ActorImpl* src_proc =
 937             mc_model_checker->get_remote_simulation().resolve_actor(mc::remote(comm->src_actor_.get()));
 938         const kernel::actor::ActorImpl* dst_proc =
 939             mc_model_checker->get_remote_simulation().resolve_actor(mc::remote(comm->dst_actor_.get()));
 940         if (issuer->get_host())
 941           label =
 942               xbt::string_printf("[(%ld)%s] Wait [(%ld)->(%ld)]", issuer->get_pid(), actor_get_host_name(issuer),
 943                                  src_proc ? src_proc->get_pid() : 0, dst_proc ? dst_proc->get_pid() : 0);
 944         else
 945           label = xbt::string_printf("[(%ld)] Wait [(%ld)->(%ld)]", issuer->get_pid(),
 946                                      src_proc ? src_proc->get_pid() : 0, dst_proc ? dst_proc->get_pid() : 0);
 947       }
 948       break;
 949
 950     case Simcall::COMM_TEST: {
 951       kernel::activity::ActivityImpl* remote_act = simcall_comm_test__getraw__comm(req);
 952       Remote<simgrid::kernel::activity::CommImpl> temp_comm;
 953       mc_model_checker->get_remote_simulation().read(temp_comm,
 954                                                      remote(static_cast<kernel::activity::CommImpl*>(remote_act)));
 955       const kernel::activity::CommImpl* comm = temp_comm.get_buffer();
 956       if (comm->src_actor_.get() == nullptr || comm->dst_actor_.get() == nullptr) {
 957         if (issuer->get_host())
 958           label = xbt::string_printf("[(%ld)%s] Test FALSE", issuer->get_pid(), actor_get_host_name(issuer));
 959         else
 960           label = bprintf("[(%ld)] Test FALSE", issuer->get_pid());
 961       } else {
 962         if (issuer->get_host())
 963           label = xbt::string_printf("[(%ld)%s] Test TRUE", issuer->get_pid(), actor_get_host_name(issuer));
 964         else
 965           label = xbt::string_printf("[(%ld)] Test TRUE", issuer->get_pid());
 966       }
 967       break;
 968     }
 969
 970     case Simcall::COMM_WAITANY: {
 971       size_t comms_size = simcall_comm_waitany__get__count(req);
 972       if (issuer->get_host())
 973         label = xbt::string_printf("[(%ld)%s] WaitAny [%d of %zu]", issuer->get_pid(),
 974                                    actor_get_host_name(issuer), value + 1, comms_size);
 975       else
 976         label = xbt::string_printf("[(%ld)] WaitAny [%d of %zu]", issuer->get_pid(), value + 1, comms_size);
 977       break;
 978     }
 979
 980     case Simcall::COMM_TESTANY:
 981       if (value == -1) {
 982         if (issuer->get_host())
 983           label = xbt::string_printf("[(%ld)%s] TestAny FALSE", issuer->get_pid(), actor_get_host_name(issuer));
 984         else
 985           label = xbt::string_printf("[(%ld)] TestAny FALSE", issuer->get_pid());
 986       } else {
 987         if (issuer->get_host())
 988           label =
 989               xbt::string_printf("[(%ld)%s] TestAny TRUE [%d of %lu]", issuer->get_pid(),
 990                                  actor_get_host_name(issuer), value + 1, simcall_comm_testany__get__count(req));
 991         else
 992           label = xbt::string_printf("[(%ld)] TestAny TRUE [%d of %lu]", issuer->get_pid(), value + 1,
 993                                      simcall_comm_testany__get__count(req));
 994       }
 995       break;
 996
 997     case Simcall::MUTEX_TRYLOCK:
 998       label = xbt::string_printf("[(%ld)] Mutex TRYLOCK", issuer->get_pid());
 999       break;
1000
1001     case Simcall::MUTEX_LOCK:
1002       label = xbt::string_printf("[(%ld)] Mutex LOCK", issuer->get_pid());
1003       break;
1004
1005     case Simcall::MC_RANDOM:
1006       if (issuer->get_host())
1007         label = xbt::string_printf("[(%ld)%s] MC_RANDOM (%d)", issuer->get_pid(), actor_get_host_name(issuer),
1008                                    value);
1009       else
1010         label = xbt::string_printf("[(%ld)] MC_RANDOM (%d)", issuer->get_pid(), value);
1011       break;
1012
1013     default:
1014       THROW_UNIMPLEMENTED;
1015   }
1016
1017   return xbt::string_printf("label = \"%s\", color = %s, fontcolor = %s", label.c_str(), color, color);
1018 }
1019
1020 const char* Api::simcall_get_name(simgrid::simix::Simcall kind) const
1021 {
1022   return simcall_names[static_cast<int>(kind)];
1023 }
1024
1025 #if HAVE_SMPI
1026 int Api::get_smpi_request_tag(smx_simcall_t const& simcall, simgrid::simix::Simcall type) const
1027 {
1028   simgrid::smpi::Request mpi_request;
1029   void* simcall_data = nullptr;
1030   if (type == Simcall::COMM_ISEND)
1031     simcall_data = simcall_comm_isend__get__data(simcall);
1032   else if (type == Simcall::COMM_IRECV)
1033     simcall_data = simcall_comm_irecv__get__data(simcall);
1034   mc_model_checker->get_remote_simulation().read(&mpi_request, remote(static_cast<smpi::Request*>(simcall_data)));
1035   return mpi_request.tag();
1036 }
1037 #endif
1038
1039 void Api::restore_state(std::shared_ptr<simgrid::mc::Snapshot> system_state) const
1040 {
1041   system_state->restore(&mc_model_checker->get_remote_simulation());
1042 }
1043
1044 void Api::log_state() const
1045 {
1046   session->log_state();
1047 }
1048
1049 bool Api::snapshot_equal(const Snapshot* s1, const Snapshot* s2) const
1050 {
1051   return simgrid::mc::snapshot_equal(s1, s2);
1052 }
1053
1054 simgrid::mc::Snapshot* Api::take_snapshot(int num_state) const
1055 {
1056   auto snapshot = new simgrid::mc::Snapshot(num_state);
1057   return snapshot;
1058 }
1059
1060 void Api::s_close() const
1061 {
1062   session->close();
1063 }
1064
1065 void Api::restore_initial_state() const
1066 {
1067   session->restore_initial_state();
1068 }
1069
1070 void Api::execute(Transition const& transition) const
1071 {
1072   session->execute(transition);
1073 }
1074
1075 #if SIMGRID_HAVE_MC
1076 void Api::automaton_load(const char* file) const
1077 {
1078   MC_automaton_load(file);
1079 }
1080 #endif
1081
1082 std::vector<int> Api::automaton_propositional_symbol_evaluate() const
1083 {
1084   unsigned int cursor = 0;
1085   std::vector<int> values;
1086   xbt_automaton_propositional_symbol_t ps = nullptr;
1087   xbt_dynar_foreach (mc::property_automaton->propositional_symbols, cursor, ps)
1088     values.push_back(xbt_automaton_propositional_symbol_evaluate(ps));
1089   return values;
1090 }
1091
1092 std::vector<xbt_automaton_state_t> Api::get_automaton_state() const
1093 {
1094   std::vector<xbt_automaton_state_t> automaton_stack;
1095   unsigned int cursor = 0;
1096   xbt_automaton_state_t automaton_state;
1097   xbt_dynar_foreach (mc::property_automaton->states, cursor, automaton_state)
1098     if (automaton_state->type == -1)
1099       automaton_stack.push_back(automaton_state);
1100   return automaton_stack;
1101 }
1102
1103 int Api::compare_automaton_exp_label(const xbt_automaton_exp_label* l) const
1104 {
1105   unsigned int cursor                    = 0;
1106   xbt_automaton_propositional_symbol_t p = nullptr;
1107   xbt_dynar_foreach (simgrid::mc::property_automaton->propositional_symbols, cursor, p) {
1108     if (std::strcmp(xbt_automaton_propositional_symbol_get_name(p), l->u.predicat) == 0)
1109       return cursor;
1110   }
1111   return -1;
1112 }
1113
1114 void Api::set_property_automaton(xbt_automaton_state_t const& automaton_state) const
1115 {
1116   mc::property_automaton->current_state = automaton_state;
1117 }
1118
1119 xbt_automaton_exp_label_t Api::get_automaton_transition_label(xbt_dynar_t const& dynar, int index) const
1120 {
1121   const xbt_automaton_transition* transition = xbt_dynar_get_as(dynar, index, xbt_automaton_transition_t);
1122   return transition->label;
1123 }
1124
1125 xbt_automaton_state_t Api::get_automaton_transition_dst(xbt_dynar_t const& dynar, int index) const
1126 {
1127   const xbt_automaton_transition* transition = xbt_dynar_get_as(dynar, index, xbt_automaton_transition_t);
1128   return transition->dst;
1129 }
1130
1131 } // namespace mc
1132 } // namespace simgrid