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 #include "src/mc/remote/RemoteSimulation.hpp"
  12 #include <xbt/asserts.h>
  13 #include <xbt/log.h>
  14 // #include <xbt/dynar.h>
  15
  16 #if HAVE_SMPI
  17 #include "src/smpi/include/smpi_request.hpp"
  18 #endif
  19
  20 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(Api, mc, "Logging specific to MC Fasade APIs ");
  21
  22 using Simcall = simgrid::simix::Simcall;
  23
  24 namespace simgrid {
  25 namespace mc {
  26
  27 static inline const char* get_color(int id)
  28 {
  29   static constexpr std::array<const char*, 13> colors{{"blue", "red", "green3", "goldenrod", "brown", "purple",
  30                                                        "magenta", "turquoise4", "gray25", "forestgreen", "hotpink",
  31                                                        "lightblue", "tan"}};
  32   return colors[id % colors.size()];
  33 }
  34
  35 static char* pointer_to_string(void* pointer)
  36 {
  37   if (XBT_LOG_ISENABLED(Api, xbt_log_priority_verbose))
  38     return bprintf("%p", pointer);
  39
  40   return xbt_strdup("(verbose only)");
  41 }
  42
  43 static char* buff_size_to_string(size_t buff_size)
  44 {
  45   if (XBT_LOG_ISENABLED(Api, xbt_log_priority_verbose))
  46     return bprintf("%zu", buff_size);
  47
  48   return xbt_strdup("(verbose only)");
  49 }
  50
  51 inline
  52 smx_mailbox_t get_mbox(smx_simcall_t const r)
  53 {
  54   switch (r->call_) {
  55     case Simcall::COMM_ISEND:
  56       return simcall_comm_isend__get__mbox(r);
  57     case Simcall::COMM_IRECV:
  58       return simcall_comm_irecv__get__mbox(r);
  59     default:
  60       return nullptr;
  61   }
  62 }
  63
  64 inline simgrid::kernel::activity::CommImpl* get_comm(smx_simcall_t const r)
  65 {
  66   switch (r->call_) {
  67     case Simcall::COMM_WAIT:
  68       return simcall_comm_wait__getraw__comm(r);
  69     case Simcall::COMM_TEST:
  70       return simcall_comm_test__getraw__comm(r);
  71     default:
  72       return nullptr;
  73   }
  74 }
  75
  76 // Does half the job
  77 inline bool request_depend_asymmetric(smx_simcall_t r1, smx_simcall_t r2)
  78 {
  79   if (r1->call_ == Simcall::COMM_ISEND && r2->call_ == Simcall::COMM_IRECV)
  80     return false;
  81
  82   if (r1->call_ == Simcall::COMM_IRECV && r2->call_ == Simcall::COMM_ISEND)
  83     return false;
  84
  85   // Those are internal requests, we do not need indirection because those objects are copies:
  86   const kernel::activity::CommImpl* synchro1 = get_comm(r1);
  87   const kernel::activity::CommImpl* synchro2 = get_comm(r2);
  88
  89   if ((r1->call_ == Simcall::COMM_ISEND || r1->call_ == Simcall::COMM_IRECV) && r2->call_ == Simcall::COMM_WAIT) {
  90     const kernel::activity::MailboxImpl* mbox = get_mbox(r1);
  91
  92     if (mbox != synchro2->mbox_cpy
  93         && simcall_comm_wait__get__timeout(r2) <= 0)
  94       return false;
  95
  96     if ((r1->issuer_ != synchro2->src_actor_.get()) && (r1->issuer_ != synchro2->dst_actor_.get()) &&
  97         simcall_comm_wait__get__timeout(r2) <= 0)
  98       return false;
  99
 100     if ((r1->call_ == Simcall::COMM_ISEND) && (synchro2->type_ == kernel::activity::CommImpl::Type::SEND) &&
 101         (synchro2->src_buff_ != simcall_comm_isend__get__src_buff(r1)) && simcall_comm_wait__get__timeout(r2) <= 0)
 102       return false;
 103
 104     if ((r1->call_ == Simcall::COMM_IRECV) && (synchro2->type_ == kernel::activity::CommImpl::Type::RECEIVE) &&
 105         (synchro2->dst_buff_ != simcall_comm_irecv__get__dst_buff(r1)) && simcall_comm_wait__get__timeout(r2) <= 0)
 106       return false;
 107   }
 108
 109   /* FIXME: the following rule assumes that the result of the isend/irecv call is not stored in a buffer used in the
 110    * test call. */
 111 #if 0
 112   if((r1->call == Simcall::COMM_ISEND || r1->call == Simcall::COMM_IRECV)
 113       &&  r2->call == Simcall::COMM_TEST)
 114     return false;
 115 #endif
 116
 117   if (r1->call_ == Simcall::COMM_WAIT && (r2->call_ == Simcall::COMM_WAIT || r2->call_ == Simcall::COMM_TEST) &&
 118       (synchro1->src_actor_.get() == nullptr || synchro1->dst_actor_.get() == nullptr))
 119     return false;
 120
 121   if (r1->call_ == Simcall::COMM_TEST &&
 122       (simcall_comm_test__get__comm(r1) == nullptr || synchro1->src_buff_ == nullptr || synchro1->dst_buff_ == nullptr))
 123     return false;
 124
 125   if (r1->call_ == Simcall::COMM_TEST && r2->call_ == Simcall::COMM_WAIT &&
 126       synchro1->src_buff_ == synchro2->src_buff_ && synchro1->dst_buff_ == synchro2->dst_buff_)
 127     return false;
 128
 129   if (r1->call_ == Simcall::COMM_WAIT && r2->call_ == Simcall::COMM_TEST && synchro1->src_buff_ != nullptr &&
 130       synchro1->dst_buff_ != nullptr && synchro2->src_buff_ != nullptr && synchro2->dst_buff_ != nullptr &&
 131       synchro1->dst_buff_ != synchro2->src_buff_ && synchro1->dst_buff_ != synchro2->dst_buff_ &&
 132       synchro2->dst_buff_ != synchro1->src_buff_)
 133     return false;
 134
 135   return true;
 136 }
 137
 138 /* Search an enabled transition for the given process.
 139  *
 140  * This can be seen as an iterator returning the next transition of the process.
 141  *
 142  * We only consider the processes that are both
 143  *  - marked "to be interleaved" in their ActorState (controlled by the checker algorithm).
 144  *  - which simcall can currently be executed (like a comm where the other partner is already known)
 145  * Once we returned the last enabled transition of a process, it is marked done.
 146  *
 147  * Things can get muddled with the WAITANY and TESTANY simcalls, that are rewritten on the fly to a bunch of WAIT
 148  * (resp TEST) transitions using the transition.argument field to remember what was the last returned sub-transition.
 149  */
 150 static inline smx_simcall_t MC_state_choose_request_for_process(simgrid::mc::State* state, smx_actor_t actor)
 151 {
 152   /* reset the outgoing transition */
 153   simgrid::mc::ActorState* procstate = &state->actor_states_[actor->get_pid()];
 154   state->transition_.pid_            = -1;
 155   state->transition_.argument_       = -1;
 156   state->executed_req_.call_         = Simcall::NONE;
 157
 158   if (not simgrid::mc::actor_is_enabled(actor))
 159     return nullptr; // Not executable in the application
 160
 161   smx_simcall_t req = nullptr;
 162   switch (actor->simcall_.call_) {
 163     case Simcall::COMM_WAITANY:
 164       state->transition_.argument_ = -1;
 165       while (procstate->times_considered < simcall_comm_waitany__get__count(&actor->simcall_)) {
 166         if (simgrid::mc::request_is_enabled_by_idx(&actor->simcall_, procstate->times_considered)) {
 167           state->transition_.argument_ = procstate->times_considered;
 168           ++procstate->times_considered;
 169           break;
 170         }
 171         ++procstate->times_considered;
 172       }
 173
 174       if (procstate->times_considered >= simcall_comm_waitany__get__count(&actor->simcall_))
 175         procstate->set_done();
 176       if (state->transition_.argument_ != -1)
 177         req = &actor->simcall_;
 178       break;
 179
 180     case Simcall::COMM_TESTANY: {
 181       unsigned start_count         = procstate->times_considered;
 182       state->transition_.argument_ = -1;
 183       while (procstate->times_considered < simcall_comm_testany__get__count(&actor->simcall_)) {
 184         if (simgrid::mc::request_is_enabled_by_idx(&actor->simcall_, procstate->times_considered)) {
 185           state->transition_.argument_ = procstate->times_considered;
 186           ++procstate->times_considered;
 187           break;
 188         }
 189         ++procstate->times_considered;
 190       }
 191
 192       if (procstate->times_considered >= simcall_comm_testany__get__count(&actor->simcall_))
 193         procstate->set_done();
 194
 195       if (state->transition_.argument_ != -1 || start_count == 0)
 196         req = &actor->simcall_;
 197
 198       break;
 199     }
 200
 201     case Simcall::COMM_WAIT: {
 202       simgrid::mc::RemotePtr<simgrid::kernel::activity::CommImpl> remote_act =
 203           remote(simcall_comm_wait__getraw__comm(&actor->simcall_));
 204       simgrid::mc::Remote<simgrid::kernel::activity::CommImpl> temp_act;
 205       mc_model_checker->get_remote_simulation().read(temp_act, remote_act);
 206       const simgrid::kernel::activity::CommImpl* act = temp_act.get_buffer();
 207       if (act->src_actor_.get() && act->dst_actor_.get())
 208         state->transition_.argument_ = 0; // OK
 209       else if (act->src_actor_.get() == nullptr && act->type_ == simgrid::kernel::activity::CommImpl::Type::READY &&
 210                act->detached())
 211         state->transition_.argument_ = 0; // OK
 212       else
 213         state->transition_.argument_ = -1; // timeout
 214       procstate->set_done();
 215       req = &actor->simcall_;
 216       break;
 217     }
 218
 219     case Simcall::MC_RANDOM: {
 220       int min_value                = simcall_mc_random__get__min(&actor->simcall_);
 221       state->transition_.argument_ = procstate->times_considered + min_value;
 222       procstate->times_considered++;
 223       if (state->transition_.argument_ == simcall_mc_random__get__max(&actor->simcall_))
 224         procstate->set_done();
 225       req = &actor->simcall_;
 226       break;
 227     }
 228
 229     default:
 230       procstate->set_done();
 231       state->transition_.argument_ = 0;
 232       req                          = &actor->simcall_;
 233       break;
 234   }
 235   if (not req)
 236     return nullptr;
 237
 238   state->transition_.pid_ = actor->get_pid();
 239   state->executed_req_    = *req;
 240   // Fetch the data of the request and translate it:
 241   state->internal_req_ = *req;
 242
 243   /* The waitany and testany request are transformed into a wait or test request over the corresponding communication
 244    * action so it can be treated later by the dependence function. */
 245   switch (req->call_) {
 246     case Simcall::COMM_WAITANY: {
 247       state->internal_req_.call_ = Simcall::COMM_WAIT;
 248       simgrid::kernel::activity::CommImpl* remote_comm;
 249       remote_comm = mc_model_checker->get_remote_simulation().read(
 250           remote(simcall_comm_waitany__get__comms(req) + state->transition_.argument_));
 251       mc_model_checker->get_remote_simulation().read(state->internal_comm_, remote(remote_comm));
 252       simcall_comm_wait__set__comm(&state->internal_req_, state->internal_comm_.get_buffer());
 253       simcall_comm_wait__set__timeout(&state->internal_req_, 0);
 254       break;
 255     }
 256
 257     case Simcall::COMM_TESTANY:
 258       state->internal_req_.call_ = Simcall::COMM_TEST;
 259
 260       if (state->transition_.argument_ > 0) {
 261         simgrid::kernel::activity::CommImpl* remote_comm = mc_model_checker->get_remote_simulation().read(
 262             remote(simcall_comm_testany__get__comms(req) + state->transition_.argument_));
 263         mc_model_checker->get_remote_simulation().read(state->internal_comm_, remote(remote_comm));
 264       }
 265
 266       simcall_comm_test__set__comm(&state->internal_req_, state->internal_comm_.get_buffer());
 267       simcall_comm_test__set__result(&state->internal_req_, state->transition_.argument_);
 268       break;
 269
 270     case Simcall::COMM_WAIT:
 271       mc_model_checker->get_remote_simulation().read_bytes(&state->internal_comm_, sizeof(state->internal_comm_),
 272                                                            remote(simcall_comm_wait__getraw__comm(req)));
 273       simcall_comm_wait__set__comm(&state->executed_req_, state->internal_comm_.get_buffer());
 274       simcall_comm_wait__set__comm(&state->internal_req_, state->internal_comm_.get_buffer());
 275       break;
 276
 277     case Simcall::COMM_TEST:
 278       mc_model_checker->get_remote_simulation().read_bytes(&state->internal_comm_, sizeof(state->internal_comm_),
 279                                                            remote(simcall_comm_test__getraw__comm(req)));
 280       simcall_comm_test__set__comm(&state->executed_req_, state->internal_comm_.get_buffer());
 281       simcall_comm_test__set__comm(&state->internal_req_, state->internal_comm_.get_buffer());
 282       break;
 283
 284     default:
 285       /* No translation needed */
 286       break;
 287   }
 288
 289   return req;
 290 }
 291
 292 void Api::initialize(char** argv) const
 293 {
 294   simgrid::mc::session = new simgrid::mc::Session([argv] {
 295     int i = 1;
 296     while (argv[i] != nullptr && argv[i][0] == '-')
 297       i++;
 298     xbt_assert(argv[i] != nullptr,
 299                "Unable to find a binary to exec on the command line. Did you only pass config flags?");
 300     execvp(argv[i], argv + i);
 301     xbt_die("The model-checked process failed to exec(): %s", strerror(errno));
 302   });
 303 }
 304
 305 std::vector<simgrid::mc::ActorInformation>& Api::get_actors() const
 306 {
 307   return mc_model_checker->get_remote_simulation().actors();
 308 }
 309
 310 bool Api::actor_is_enabled(aid_t pid) const
 311 {
 312   return session->actor_is_enabled(pid);
 313 }
 314
 315 unsigned long Api::get_maxpid() const
 316 {
 317   return MC_smx_get_maxpid();
 318 }
 319
 320 int Api::get_actors_size() const
 321 {
 322   return mc_model_checker->get_remote_simulation().actors().size();
 323 }
 324
 325 bool Api::comm_addr_equal(const kernel::activity::CommImpl* comm_addr1,
 326                              const kernel::activity::CommImpl* comm_addr2) const
 327 {
 328   return remote(comm_addr1) == remote(comm_addr2);
 329 }
 330
 331 kernel::activity::CommImpl* Api::get_comm_isend_raw_addr(smx_simcall_t request) const
 332 {
 333   auto comm_addr = simcall_comm_isend__getraw__result(request);
 334   return static_cast<kernel::activity::CommImpl*>(comm_addr);
 335 }
 336
 337 kernel::activity::CommImpl* Api::get_comm_wait_raw_addr(smx_simcall_t request) const
 338 {
 339   return simcall_comm_wait__getraw__comm(request);
 340 }
 341
 342 kernel::activity::CommImpl* Api::get_comm_waitany_raw_addr(smx_simcall_t request, int value) const
 343 {
 344   auto addr =
 345       mc_model_checker->get_remote_simulation().read(remote(simcall_comm_waitany__getraw__comms(request) + value));
 346   return static_cast<simgrid::kernel::activity::CommImpl*>(addr);
 347 }
 348
 349 std::string Api::get_pattern_comm_rdv(void* addr) const
 350 {
 351   Remote<kernel::activity::CommImpl> temp_synchro;
 352   mc_model_checker->get_remote_simulation().read(temp_synchro, remote((simgrid::kernel::activity::CommImpl*)addr));
 353   const kernel::activity::CommImpl* synchro = temp_synchro.get_buffer();
 354
 355   char* remote_name = mc_model_checker->get_remote_simulation().read<char*>(RemotePtr<char*>(
 356       (uint64_t)(synchro->get_mailbox() ? &synchro->get_mailbox()->get_name() : &synchro->mbox_cpy->get_name())));
 357   auto rdv          = mc_model_checker->get_remote_simulation().read_string(RemotePtr<char>(remote_name));
 358   return rdv;
 359 }
 360
 361 unsigned long Api::get_pattern_comm_src_proc(void* addr) const
 362 {
 363   Remote<kernel::activity::CommImpl> temp_synchro;
 364   mc_model_checker->get_remote_simulation().read(temp_synchro, remote((simgrid::kernel::activity::CommImpl*)addr));
 365   const kernel::activity::CommImpl* synchro = temp_synchro.get_buffer();
 366   auto src_proc =
 367       mc_model_checker->get_remote_simulation().resolve_actor(mc::remote(synchro->src_actor_.get()))->get_pid();
 368   return src_proc;
 369 }
 370
 371 unsigned long Api::get_pattern_comm_dst_proc(void* addr) const
 372 {
 373   Remote<kernel::activity::CommImpl> temp_synchro;
 374   mc_model_checker->get_remote_simulation().read(temp_synchro, remote((simgrid::kernel::activity::CommImpl*)addr));
 375   const kernel::activity::CommImpl* synchro = temp_synchro.get_buffer();
 376   auto src_proc =
 377       mc_model_checker->get_remote_simulation().resolve_actor(mc::remote(synchro->dst_actor_.get()))->get_pid();
 378   return src_proc;
 379 }
 380
 381 std::vector<char> Api::get_pattern_comm_data(void* addr) const
 382 {
 383   Remote<kernel::activity::CommImpl> temp_synchro;
 384   mc_model_checker->get_remote_simulation().read(temp_synchro, remote((simgrid::kernel::activity::CommImpl*)addr));
 385   const kernel::activity::CommImpl* synchro = temp_synchro.get_buffer();
 386
 387   std::vector<char> buffer{};
 388   if (synchro->src_buff_ != nullptr) {
 389     buffer.resize(synchro->src_buff_size_);
 390     mc_model_checker->get_remote_simulation().read_bytes(buffer.data(), buffer.size(), remote(synchro->src_buff_));
 391   }
 392   return buffer;
 393 }
 394
 395 std::vector<char> Api::get_pattern_comm_data(const kernel::activity::CommImpl* comm_addr) const
 396 {
 397   simgrid::mc::Remote<simgrid::kernel::activity::CommImpl> temp_comm;
 398   mc_model_checker->get_remote_simulation().read(temp_comm, remote((kernel::activity::CommImpl*)comm_addr));
 399   const simgrid::kernel::activity::CommImpl* comm = temp_comm.get_buffer();
 400
 401   std::vector<char> buffer{};
 402   if (comm->src_buff_ != nullptr) {
 403     buffer.resize(comm->src_buff_size_);
 404     mc_model_checker->get_remote_simulation().read_bytes(buffer.data(), buffer.size(), remote(comm->src_buff_));
 405   }
 406   return buffer;
 407 }
 408
 409 const char* Api::get_actor_host_name(smx_actor_t actor) const
 410 {
 411   const char* host_name = MC_smx_actor_get_host_name(actor);
 412   return host_name;
 413 }
 414
 415 #if HAVE_SMPI
 416 bool Api::check_send_request_detached(smx_simcall_t const& simcall) const
 417 {
 418   simgrid::smpi::Request mpi_request;
 419   mc_model_checker->get_remote_simulation().read(
 420       &mpi_request, remote(static_cast<smpi::Request*>(simcall_comm_isend__get__data(simcall))));
 421   return mpi_request.detached();
 422 }
 423 #endif
 424
 425 smx_actor_t Api::get_src_actor(const kernel::activity::CommImpl* comm_addr) const
 426 {
 427   simgrid::mc::Remote<simgrid::kernel::activity::CommImpl> temp_comm;
 428   mc_model_checker->get_remote_simulation().read(temp_comm, remote((kernel::activity::CommImpl*)comm_addr));
 429   const simgrid::kernel::activity::CommImpl* comm = temp_comm.get_buffer();
 430
 431   auto src_proc = mc_model_checker->get_remote_simulation().resolve_actor(simgrid::mc::remote(comm->src_actor_.get()));
 432   return src_proc;
 433 }
 434
 435 smx_actor_t Api::get_dst_actor(const kernel::activity::CommImpl* comm_addr) const
 436 {
 437   simgrid::mc::Remote<simgrid::kernel::activity::CommImpl> temp_comm;
 438   mc_model_checker->get_remote_simulation().read(temp_comm, remote((kernel::activity::CommImpl*)comm_addr));
 439   const simgrid::kernel::activity::CommImpl* comm = temp_comm.get_buffer();
 440
 441   auto dst_proc = mc_model_checker->get_remote_simulation().resolve_actor(simgrid::mc::remote(comm->dst_actor_.get()));
 442   return dst_proc;
 443 }
 444
 445 std::size_t Api::get_remote_heap_bytes() const
 446 {
 447   RemoteSimulation& process = mc_model_checker->get_remote_simulation();
 448   auto heap_bytes_used      = mmalloc_get_bytes_used_remote(process.get_heap()->heaplimit, process.get_malloc_info());
 449   return heap_bytes_used;
 450 }
 451
 452 void Api::session_initialize() const
 453 {
 454   session->initialize();
 455 }
 456
 457 void Api::mc_inc_visited_states() const
 458 {
 459   mc_model_checker->visited_states++;
 460 }
 461
 462 void Api::mc_inc_executed_trans() const
 463 {
 464   mc_model_checker->executed_transitions++;
 465 }
 466
 467 unsigned long Api::mc_get_visited_states() const
 468 {
 469   return mc_model_checker->visited_states;
 470 }
 471
 472 unsigned long Api::mc_get_executed_trans() const
 473 {
 474   return mc_model_checker->executed_transitions;
 475 }
 476
 477 bool Api::mc_check_deadlock() const
 478 {
 479   return mc_model_checker->checkDeadlock();
 480 }
 481
 482 void Api::mc_show_deadlock() const
 483 {
 484   MC_show_deadlock();
 485 }
 486
 487 smx_actor_t Api::simcall_get_issuer(s_smx_simcall const* req) const
 488 {
 489   return MC_smx_simcall_get_issuer(req);
 490 }
 491
 492 long Api::simcall_get_actor_id(s_smx_simcall const* req) const
 493 {
 494   return MC_smx_simcall_get_issuer(req)->get_pid();
 495 }
 496
 497 smx_mailbox_t Api::simcall_get_mbox(smx_simcall_t const req) const
 498 {
 499   return get_mbox(req);
 500 }
 501
 502 simgrid::kernel::activity::CommImpl* Api::simcall_get_comm(smx_simcall_t const req) const
 503 {
 504   return get_comm(req);
 505 }
 506
 507 bool Api::mc_is_null() const
 508 {
 509   auto is_null = (mc_model_checker == nullptr) ? true : false;
 510   return is_null;
 511 }
 512
 513 Checker* Api::mc_get_checker() const
 514 {
 515   return mc_model_checker->getChecker();
 516 }
 517
 518 void Api::set_checker(Checker* const checker) const
 519 {
 520   xbt_assert(mc_model_checker);
 521   xbt_assert(mc_model_checker->getChecker() == nullptr);
 522   mc_model_checker->setChecker(checker);
 523 }
 524
 525 RemoteSimulation& Api::mc_get_remote_simulation() const
 526 {
 527   return mc_model_checker->get_remote_simulation();
 528 }
 529
 530 void Api::handle_simcall(Transition const& transition) const
 531 {
 532   mc_model_checker->handle_simcall(transition);
 533 }
 534
 535 void Api::mc_wait_for_requests() const
 536 {
 537   mc_model_checker->wait_for_requests();
 538 }
 539
 540 void Api::mc_exit(int status) const
 541 {
 542   mc_model_checker->exit(status);
 543 }
 544
 545 std::string const& Api::mc_get_host_name(std::string const& hostname) const
 546 {
 547   return mc_model_checker->get_host_name(hostname);
 548 }
 549
 550 void Api::dump_record_path() const
 551 {
 552   simgrid::mc::dumpRecordPath();
 553 }
 554
 555 smx_simcall_t Api::mc_state_choose_request(simgrid::mc::State* state) const
 556 {
 557   for (auto& actor : mc_model_checker->get_remote_simulation().actors()) {
 558     /* Only consider the actors that were marked as interleaving by the checker algorithm */
 559     if (not state->actor_states_[actor.copy.get_buffer()->get_pid()].is_todo())
 560       continue;
 561
 562     smx_simcall_t res = MC_state_choose_request_for_process(state, actor.copy.get_buffer());
 563     if (res)
 564       return res;
 565   }
 566   return nullptr;
 567 }
 568
 569 bool Api::simcall_check_dependency(smx_simcall_t const req1, smx_simcall_t const req2) const
 570 {
 571   if (req1->issuer_ == req2->issuer_)
 572     return false;
 573
 574   /* Wait with timeout transitions are not considered by the independence theorem, thus we consider them as dependent with all other transitions */
 575   if ((req1->call_ == Simcall::COMM_WAIT && simcall_comm_wait__get__timeout(req1) > 0) ||
 576       (req2->call_ == Simcall::COMM_WAIT && simcall_comm_wait__get__timeout(req2) > 0))
 577     return true;
 578
 579   if (req1->call_ != req2->call_)
 580     return request_depend_asymmetric(req1, req2) && request_depend_asymmetric(req2, req1);
 581
 582   // Those are internal requests, we do not need indirection because those objects are copies:
 583   const kernel::activity::CommImpl* synchro1 = get_comm(req1);
 584   const kernel::activity::CommImpl* synchro2 = get_comm(req2);
 585
 586   switch (req1->call_) {
 587     case Simcall::COMM_ISEND:
 588       return simcall_comm_isend__get__mbox(req1) == simcall_comm_isend__get__mbox(req2);
 589     case Simcall::COMM_IRECV:
 590       return simcall_comm_irecv__get__mbox(req1) == simcall_comm_irecv__get__mbox(req2);
 591     case Simcall::COMM_WAIT:
 592       if (synchro1->src_buff_ == synchro2->src_buff_ && synchro1->dst_buff_ == synchro2->dst_buff_)
 593         return false;
 594       if (synchro1->src_buff_ != nullptr && synchro1->dst_buff_ != nullptr && synchro2->src_buff_ != nullptr &&
 595           synchro2->dst_buff_ != nullptr && synchro1->dst_buff_ != synchro2->src_buff_ &&
 596           synchro1->dst_buff_ != synchro2->dst_buff_ && synchro2->dst_buff_ != synchro1->src_buff_)
 597         return false;
 598       return true;
 599     default:
 600       return true;
 601   }
 602 }
 603
 604 std::string Api::request_to_string(smx_simcall_t req, int value, RequestType request_type) const
 605 {
 606   xbt_assert(mc_model_checker != nullptr, "Must be called from MCer");
 607
 608   if (req->inspector_ != nullptr)
 609     return req->inspector_->to_string();
 610
 611   bool use_remote_comm = true;
 612   switch (request_type) {
 613     case simgrid::mc::RequestType::simix:
 614       use_remote_comm = true;
 615       break;
 616     case simgrid::mc::RequestType::executed:
 617     case simgrid::mc::RequestType::internal:
 618       use_remote_comm = false;
 619       break;
 620     default:
 621       THROW_IMPOSSIBLE;
 622   }
 623
 624   const char* type = nullptr;
 625   char* args       = nullptr;
 626
 627   smx_actor_t issuer = MC_smx_simcall_get_issuer(req);
 628
 629   switch (req->call_) {
 630     case Simcall::COMM_ISEND: {
 631       type     = "iSend";
 632       char* p  = pointer_to_string(simcall_comm_isend__get__src_buff(req));
 633       char* bs = buff_size_to_string(simcall_comm_isend__get__src_buff_size(req));
 634       if (issuer->get_host())
 635         args = bprintf("src=(%ld)%s (%s), buff=%s, size=%s", issuer->get_pid(), MC_smx_actor_get_host_name(issuer),
 636                        MC_smx_actor_get_name(issuer), p, bs);
 637       else
 638         args = bprintf("src=(%ld)%s, buff=%s, size=%s", issuer->get_pid(), MC_smx_actor_get_name(issuer), p, bs);
 639       xbt_free(bs);
 640       xbt_free(p);
 641       break;
 642     }
 643
 644     case Simcall::COMM_IRECV: {
 645       size_t* remote_size = simcall_comm_irecv__get__dst_buff_size(req);
 646       size_t size         = 0;
 647       if (remote_size)
 648         mc_model_checker->get_remote_simulation().read_bytes(&size, sizeof(size), remote(remote_size));
 649
 650       type     = "iRecv";
 651       char* p  = pointer_to_string(simcall_comm_irecv__get__dst_buff(req));
 652       char* bs = buff_size_to_string(size);
 653       if (issuer->get_host())
 654         args = bprintf("dst=(%ld)%s (%s), buff=%s, size=%s", issuer->get_pid(), MC_smx_actor_get_host_name(issuer),
 655                        MC_smx_actor_get_name(issuer), p, bs);
 656       else
 657         args = bprintf("dst=(%ld)%s, buff=%s, size=%s", issuer->get_pid(), MC_smx_actor_get_name(issuer), p, bs);
 658       xbt_free(bs);
 659       xbt_free(p);
 660       break;
 661     }
 662
 663     case Simcall::COMM_WAIT: {
 664       simgrid::kernel::activity::CommImpl* remote_act = simcall_comm_wait__getraw__comm(req);
 665       char* p;
 666       if (value == -1) {
 667         type = "WaitTimeout";
 668         p    = pointer_to_string(remote_act);
 669         args = bprintf("comm=%s", p);
 670       } else {
 671         type = "Wait";
 672         p    = pointer_to_string(remote_act);
 673
 674         simgrid::mc::Remote<simgrid::kernel::activity::CommImpl> temp_synchro;
 675         const simgrid::kernel::activity::CommImpl* act;
 676         if (use_remote_comm) {
 677           mc_model_checker->get_remote_simulation().read(temp_synchro, remote(remote_act));
 678           act = temp_synchro.get_buffer();
 679         } else
 680           act = remote_act;
 681
 682         smx_actor_t src_proc =
 683             mc_model_checker->get_remote_simulation().resolve_actor(simgrid::mc::remote(act->src_actor_.get()));
 684         smx_actor_t dst_proc =
 685             mc_model_checker->get_remote_simulation().resolve_actor(simgrid::mc::remote(act->dst_actor_.get()));
 686         args = bprintf("comm=%s [(%ld)%s (%s)-> (%ld)%s (%s)]", p, src_proc ? src_proc->get_pid() : 0,
 687                        src_proc ? MC_smx_actor_get_host_name(src_proc) : "",
 688                        src_proc ? MC_smx_actor_get_name(src_proc) : "", dst_proc ? dst_proc->get_pid() : 0,
 689                        dst_proc ? MC_smx_actor_get_host_name(dst_proc) : "",
 690                        dst_proc ? MC_smx_actor_get_name(dst_proc) : "");
 691       }
 692       xbt_free(p);
 693       break;
 694     }
 695
 696     case Simcall::COMM_TEST: {
 697       simgrid::kernel::activity::CommImpl* remote_act = simcall_comm_test__getraw__comm(req);
 698       simgrid::mc::Remote<simgrid::kernel::activity::CommImpl> temp_synchro;
 699       const simgrid::kernel::activity::CommImpl* act;
 700       if (use_remote_comm) {
 701         mc_model_checker->get_remote_simulation().read(temp_synchro, remote(remote_act));
 702         act = temp_synchro.get_buffer();
 703       } else
 704         act = remote_act;
 705
 706       char* p;
 707       if (act->src_actor_.get() == nullptr || act->dst_actor_.get() == nullptr) {
 708         type = "Test FALSE";
 709         p    = pointer_to_string(remote_act);
 710         args = bprintf("comm=%s", p);
 711       } else {
 712         type = "Test TRUE";
 713         p    = pointer_to_string(remote_act);
 714
 715         smx_actor_t src_proc =
 716             mc_model_checker->get_remote_simulation().resolve_actor(simgrid::mc::remote(act->src_actor_.get()));
 717         smx_actor_t dst_proc =
 718             mc_model_checker->get_remote_simulation().resolve_actor(simgrid::mc::remote(act->dst_actor_.get()));
 719         args = bprintf("comm=%s [(%ld)%s (%s) -> (%ld)%s (%s)]", p, src_proc->get_pid(),
 720                        MC_smx_actor_get_name(src_proc), MC_smx_actor_get_host_name(src_proc), dst_proc->get_pid(),
 721                        MC_smx_actor_get_name(dst_proc), MC_smx_actor_get_host_name(dst_proc));
 722       }
 723       xbt_free(p);
 724       break;
 725     }
 726
 727     case Simcall::COMM_WAITANY: {
 728       type         = "WaitAny";
 729       size_t count = simcall_comm_waitany__get__count(req);
 730       if (count > 0) {
 731         simgrid::kernel::activity::CommImpl* remote_sync;
 732         remote_sync =
 733             mc_model_checker->get_remote_simulation().read(remote(simcall_comm_waitany__get__comms(req) + value));
 734         char* p = pointer_to_string(remote_sync);
 735         args    = bprintf("comm=%s (%d of %zu)", p, value + 1, count);
 736         xbt_free(p);
 737       } else
 738         args = bprintf("comm at idx %d", value);
 739       break;
 740     }
 741
 742     case Simcall::COMM_TESTANY:
 743       if (value == -1) {
 744         type = "TestAny FALSE";
 745         args = xbt_strdup("-");
 746       } else {
 747         type = "TestAny";
 748         args = bprintf("(%d of %zu)", value + 1, simcall_comm_testany__get__count(req));
 749       }
 750       break;
 751
 752     case Simcall::MUTEX_TRYLOCK:
 753     case Simcall::MUTEX_LOCK: {
 754       if (req->call_ == Simcall::MUTEX_LOCK)
 755         type = "Mutex LOCK";
 756       else
 757         type = "Mutex TRYLOCK";
 758
 759       simgrid::mc::Remote<simgrid::kernel::activity::MutexImpl> mutex;
 760       mc_model_checker->get_remote_simulation().read_bytes(mutex.get_buffer(), sizeof(mutex),
 761                                                            remote(req->call_ == Simcall::MUTEX_LOCK
 762                                                                       ? simcall_mutex_lock__get__mutex(req)
 763                                                                       : simcall_mutex_trylock__get__mutex(req)));
 764       args = bprintf("locked = %d, owner = %d, sleeping = n/a", mutex.get_buffer()->is_locked(),
 765                      mutex.get_buffer()->get_owner() != nullptr
 766                          ? (int)mc_model_checker->get_remote_simulation()
 767                                .resolve_actor(simgrid::mc::remote(mutex.get_buffer()->get_owner()))
 768                                ->get_pid()
 769                          : -1);
 770       break;
 771     }
 772
 773     case Simcall::MC_RANDOM:
 774       type = "MC_RANDOM";
 775       args = bprintf("%d", value);
 776       break;
 777
 778     default:
 779       type = SIMIX_simcall_name(req->call_);
 780       args = bprintf("??");
 781       break;
 782   }
 783
 784   std::string str;
 785   if (args != nullptr)
 786     str = simgrid::xbt::string_printf("[(%ld)%s (%s)] %s(%s)", issuer->get_pid(), MC_smx_actor_get_host_name(issuer),
 787                                       MC_smx_actor_get_name(issuer), type, args);
 788   else
 789     str = simgrid::xbt::string_printf("[(%ld)%s (%s)] %s ", issuer->get_pid(), MC_smx_actor_get_host_name(issuer),
 790                                       MC_smx_actor_get_name(issuer), type);
 791   xbt_free(args);
 792   return str;
 793 }
 794
 795 std::string Api::request_get_dot_output(smx_simcall_t req, int value) const
 796 {
 797   const smx_actor_t issuer = MC_smx_simcall_get_issuer(req);
 798   const char* color        = get_color(issuer->get_pid() - 1);
 799
 800   if (req->inspector_ != nullptr)
 801     return simgrid::xbt::string_printf("label = \"%s\", color = %s, fontcolor = %s",
 802                                        req->inspector_->dot_label().c_str(), color, color);
 803
 804   std::string label;
 805
 806   switch (req->call_) {
 807     case Simcall::COMM_ISEND:
 808       if (issuer->get_host())
 809         label = xbt::string_printf("[(%ld)%s] iSend", issuer->get_pid(), MC_smx_actor_get_host_name(issuer));
 810       else
 811         label = bprintf("[(%ld)] iSend", issuer->get_pid());
 812       break;
 813
 814     case Simcall::COMM_IRECV:
 815       if (issuer->get_host())
 816         label = xbt::string_printf("[(%ld)%s] iRecv", issuer->get_pid(), MC_smx_actor_get_host_name(issuer));
 817       else
 818         label = xbt::string_printf("[(%ld)] iRecv", issuer->get_pid());
 819       break;
 820
 821     case Simcall::COMM_WAIT:
 822       if (value == -1) {
 823         if (issuer->get_host())
 824           label = xbt::string_printf("[(%ld)%s] WaitTimeout", issuer->get_pid(), MC_smx_actor_get_host_name(issuer));
 825         else
 826           label = xbt::string_printf("[(%ld)] WaitTimeout", issuer->get_pid());
 827       } else {
 828         kernel::activity::ActivityImpl* remote_act = simcall_comm_wait__getraw__comm(req);
 829         Remote<kernel::activity::CommImpl> temp_comm;
 830         mc_model_checker->get_remote_simulation().read(temp_comm,
 831                                                        remote(static_cast<kernel::activity::CommImpl*>(remote_act)));
 832         const kernel::activity::CommImpl* comm = temp_comm.get_buffer();
 833
 834         const kernel::actor::ActorImpl* src_proc =
 835             mc_model_checker->get_remote_simulation().resolve_actor(mc::remote(comm->src_actor_.get()));
 836         const kernel::actor::ActorImpl* dst_proc =
 837             mc_model_checker->get_remote_simulation().resolve_actor(mc::remote(comm->dst_actor_.get()));
 838         if (issuer->get_host())
 839           label =
 840               xbt::string_printf("[(%ld)%s] Wait [(%ld)->(%ld)]", issuer->get_pid(), MC_smx_actor_get_host_name(issuer),
 841                                  src_proc ? src_proc->get_pid() : 0, dst_proc ? dst_proc->get_pid() : 0);
 842         else
 843           label = xbt::string_printf("[(%ld)] Wait [(%ld)->(%ld)]", issuer->get_pid(),
 844                                      src_proc ? src_proc->get_pid() : 0, dst_proc ? dst_proc->get_pid() : 0);
 845       }
 846       break;
 847
 848     case Simcall::COMM_TEST: {
 849       kernel::activity::ActivityImpl* remote_act = simcall_comm_test__getraw__comm(req);
 850       Remote<simgrid::kernel::activity::CommImpl> temp_comm;
 851       mc_model_checker->get_remote_simulation().read(temp_comm,
 852                                                      remote(static_cast<kernel::activity::CommImpl*>(remote_act)));
 853       const kernel::activity::CommImpl* comm = temp_comm.get_buffer();
 854       if (comm->src_actor_.get() == nullptr || comm->dst_actor_.get() == nullptr) {
 855         if (issuer->get_host())
 856           label = xbt::string_printf("[(%ld)%s] Test FALSE", issuer->get_pid(), MC_smx_actor_get_host_name(issuer));
 857         else
 858           label = bprintf("[(%ld)] Test FALSE", issuer->get_pid());
 859       } else {
 860         if (issuer->get_host())
 861           label = xbt::string_printf("[(%ld)%s] Test TRUE", issuer->get_pid(), MC_smx_actor_get_host_name(issuer));
 862         else
 863           label = xbt::string_printf("[(%ld)] Test TRUE", issuer->get_pid());
 864       }
 865       break;
 866     }
 867
 868     case Simcall::COMM_WAITANY: {
 869       size_t comms_size = simcall_comm_waitany__get__count(req);
 870       if (issuer->get_host())
 871         label = xbt::string_printf("[(%ld)%s] WaitAny [%d of %zu]", issuer->get_pid(),
 872                                    MC_smx_actor_get_host_name(issuer), value + 1, comms_size);
 873       else
 874         label = xbt::string_printf("[(%ld)] WaitAny [%d of %zu]", issuer->get_pid(), value + 1, comms_size);
 875       break;
 876     }
 877
 878     case Simcall::COMM_TESTANY:
 879       if (value == -1) {
 880         if (issuer->get_host())
 881           label = xbt::string_printf("[(%ld)%s] TestAny FALSE", issuer->get_pid(), MC_smx_actor_get_host_name(issuer));
 882         else
 883           label = xbt::string_printf("[(%ld)] TestAny FALSE", issuer->get_pid());
 884       } else {
 885         if (issuer->get_host())
 886           label =
 887               xbt::string_printf("[(%ld)%s] TestAny TRUE [%d of %lu]", issuer->get_pid(),
 888                                  MC_smx_actor_get_host_name(issuer), value + 1, simcall_comm_testany__get__count(req));
 889         else
 890           label = xbt::string_printf("[(%ld)] TestAny TRUE [%d of %lu]", issuer->get_pid(), value + 1,
 891                                      simcall_comm_testany__get__count(req));
 892       }
 893       break;
 894
 895     case Simcall::MUTEX_TRYLOCK:
 896       label = xbt::string_printf("[(%ld)] Mutex TRYLOCK", issuer->get_pid());
 897       break;
 898
 899     case Simcall::MUTEX_LOCK:
 900       label = xbt::string_printf("[(%ld)] Mutex LOCK", issuer->get_pid());
 901       break;
 902
 903     case Simcall::MC_RANDOM:
 904       if (issuer->get_host())
 905         label = xbt::string_printf("[(%ld)%s] MC_RANDOM (%d)", issuer->get_pid(), MC_smx_actor_get_host_name(issuer),
 906                                    value);
 907       else
 908         label = xbt::string_printf("[(%ld)] MC_RANDOM (%d)", issuer->get_pid(), value);
 909       break;
 910
 911     default:
 912       THROW_UNIMPLEMENTED;
 913   }
 914
 915   return xbt::string_printf("label = \"%s\", color = %s, fontcolor = %s", label.c_str(), color, color);
 916 }
 917
 918 const char* Api::simcall_get_name(simgrid::simix::Simcall kind) const
 919 {
 920   return SIMIX_simcall_name(kind);
 921 }
 922
 923 #if HAVE_SMPI
 924 int Api::get_smpi_request_tag(smx_simcall_t const& simcall, simgrid::simix::Simcall type) const
 925 {
 926   simgrid::smpi::Request mpi_request;
 927   void* simcall_data = nullptr;
 928   if (type == Simcall::COMM_ISEND)
 929     simcall_data = simcall_comm_isend__get__data(simcall);
 930   else if (type == Simcall::COMM_IRECV)
 931     simcall_data = simcall_comm_irecv__get__data(simcall);
 932   mc_model_checker->get_remote_simulation().read(&mpi_request, remote(static_cast<smpi::Request*>(simcall_data)));
 933   return mpi_request.tag();
 934 }
 935 #endif
 936
 937 void Api::restore_state(std::shared_ptr<simgrid::mc::Snapshot> system_state) const
 938 {
 939   system_state->restore(&mc_model_checker->get_remote_simulation());
 940 }
 941
 942 void Api::log_state() const
 943 {
 944   session->log_state();
 945 }
 946
 947 bool Api::snapshot_equal(const Snapshot* s1, const Snapshot* s2) const
 948 {
 949   return simgrid::mc::snapshot_equal(s1, s2);
 950 }
 951
 952 simgrid::mc::Snapshot* Api::take_snapshot(int num_state) const
 953 {
 954   auto snapshot = new simgrid::mc::Snapshot(num_state);
 955   return snapshot;
 956 }
 957
 958 void Api::s_close() const
 959 {
 960   session->close();
 961 }
 962
 963 void Api::restore_initial_state() const
 964 {
 965   session->restore_initial_state();
 966 }
 967
 968 void Api::execute(Transition const& transition) const
 969 {
 970   session->execute(transition);
 971 }
 972
 973 #if SIMGRID_HAVE_MC
 974 void Api::automaton_load(const char* file) const
 975 {
 976   MC_automaton_load(file);
 977 }
 978 #endif
 979
 980 std::vector<int> Api::automaton_propositional_symbol_evaluate() const
 981 {
 982   unsigned int cursor = 0;
 983   std::vector<int> values;
 984   xbt_automaton_propositional_symbol_t ps = nullptr;
 985   xbt_dynar_foreach (mc::property_automaton->propositional_symbols, cursor, ps)
 986     values.push_back(xbt_automaton_propositional_symbol_evaluate(ps));
 987   return values;
 988 }
 989
 990 std::vector<xbt_automaton_state_t> Api::get_automaton_state() const
 991 {
 992   std::vector<xbt_automaton_state_t> automaton_stack;
 993   unsigned int cursor = 0;
 994   xbt_automaton_state_t automaton_state;
 995   xbt_dynar_foreach (mc::property_automaton->states, cursor, automaton_state)
 996     if (automaton_state->type == -1)
 997       automaton_stack.push_back(automaton_state);
 998   return automaton_stack;
 999 }
1000
1001 int Api::compare_automaton_exp_label(const xbt_automaton_exp_label* l) const
1002 {
1003   unsigned int cursor                    = 0;
1004   xbt_automaton_propositional_symbol_t p = nullptr;
1005   xbt_dynar_foreach (simgrid::mc::property_automaton->propositional_symbols, cursor, p) {
1006     if (std::strcmp(xbt_automaton_propositional_symbol_get_name(p), l->u.predicat) == 0)
1007       return cursor;
1008   }
1009   return -1;
1010 }
1011
1012 void Api::set_property_automaton(xbt_automaton_state_t const& automaton_state) const
1013 {
1014   mc::property_automaton->current_state = automaton_state;
1015 }
1016
1017 xbt_automaton_exp_label_t Api::get_automaton_transition_label(xbt_dynar_t const& dynar, int index) const
1018 {
1019   const xbt_automaton_transition* transition = xbt_dynar_get_as(dynar, index, xbt_automaton_transition_t);
1020   return transition->label;
1021 }
1022
1023 xbt_automaton_state_t Api::get_automaton_transition_dst(xbt_dynar_t const& dynar, int index) const
1024 {
1025   const xbt_automaton_transition* transition = xbt_dynar_get_as(dynar, index, xbt_automaton_transition_t);
1026   return transition->dst;
1027 }
1028
1029 } // namespace mc
1030 } // namespace simgrid