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