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); // r1->get_mboxx')
  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 bool Api::mc_is_null() const
 503 {
 504   auto is_null = (mc_model_checker == nullptr) ? true : false;
 505   return is_null;
 506 }
 507
 508 Checker* Api::mc_get_checker() const
 509 {
 510   return mc_model_checker->getChecker();
 511 }
 512
 513 void Api::set_checker(Checker* const checker) const
 514 {
 515   xbt_assert(mc_model_checker);
 516   xbt_assert(mc_model_checker->getChecker() == nullptr);
 517   mc_model_checker->setChecker(checker);
 518 }
 519
 520 void Api::handle_simcall(Transition const& transition) const
 521 {
 522   mc_model_checker->handle_simcall(transition);
 523 }
 524
 525 void Api::mc_wait_for_requests() const
 526 {
 527   mc_model_checker->wait_for_requests();
 528 }
 529
 530 void Api::mc_exit(int status) const
 531 {
 532   mc_model_checker->exit(status);
 533 }
 534
 535 std::string const& Api::mc_get_host_name(std::string const& hostname) const
 536 {
 537   return mc_model_checker->get_host_name(hostname);
 538 }
 539
 540 void Api::dump_record_path() const
 541 {
 542   simgrid::mc::dumpRecordPath();
 543 }
 544
 545 smx_simcall_t Api::mc_state_choose_request(simgrid::mc::State* state) const
 546 {
 547   for (auto& actor : mc_model_checker->get_remote_simulation().actors()) {
 548     /* Only consider the actors that were marked as interleaving by the checker algorithm */
 549     if (not state->actor_states_[actor.copy.get_buffer()->get_pid()].is_todo())
 550       continue;
 551
 552     smx_simcall_t res = MC_state_choose_request_for_process(state, actor.copy.get_buffer());
 553     if (res)
 554       return res;
 555   }
 556   return nullptr;
 557 }
 558
 559 bool Api::simcall_check_dependency(smx_simcall_t const req1, smx_simcall_t const req2) const
 560 {
 561   if (req1->issuer_ == req2->issuer_)
 562     return false;
 563
 564   /* Wait with timeout transitions are not considered by the independence theorem, thus we consider them as dependent with all other transitions */
 565   if ((req1->call_ == Simcall::COMM_WAIT && simcall_comm_wait__get__timeout(req1) > 0) ||
 566       (req2->call_ == Simcall::COMM_WAIT && simcall_comm_wait__get__timeout(req2) > 0))
 567     return true;
 568
 569   if (req1->call_ != req2->call_)
 570     return request_depend_asymmetric(req1, req2) && request_depend_asymmetric(req2, req1);
 571
 572   // Those are internal requests, we do not need indirection because those objects are copies:
 573   const kernel::activity::CommImpl* synchro1 = get_comm(req1);
 574   const kernel::activity::CommImpl* synchro2 = get_comm(req2);
 575
 576   switch (req1->call_) {
 577     case Simcall::COMM_ISEND:
 578       return simcall_comm_isend__get__mbox(req1) == simcall_comm_isend__get__mbox(req2);
 579     case Simcall::COMM_IRECV:
 580       return simcall_comm_irecv__get__mbox(req1) == simcall_comm_irecv__get__mbox(req2);
 581     case Simcall::COMM_WAIT:
 582       if (synchro1->src_buff_ == synchro2->src_buff_ && synchro1->dst_buff_ == synchro2->dst_buff_)
 583         return false;
 584       if (synchro1->src_buff_ != nullptr && synchro1->dst_buff_ != nullptr && synchro2->src_buff_ != nullptr &&
 585           synchro2->dst_buff_ != nullptr && synchro1->dst_buff_ != synchro2->src_buff_ &&
 586           synchro1->dst_buff_ != synchro2->dst_buff_ && synchro2->dst_buff_ != synchro1->src_buff_)
 587         return false;
 588       return true;
 589     default:
 590       return true;
 591   }
 592 }
 593
 594 std::string Api::request_to_string(smx_simcall_t req, int value, RequestType request_type) const
 595 {
 596   xbt_assert(mc_model_checker != nullptr, "Must be called from MCer");
 597
 598   if (req->inspector_ != nullptr)
 599     return req->inspector_->to_string();
 600
 601   bool use_remote_comm = true;
 602   switch (request_type) {
 603     case simgrid::mc::RequestType::simix:
 604       use_remote_comm = true;
 605       break;
 606     case simgrid::mc::RequestType::executed:
 607     case simgrid::mc::RequestType::internal:
 608       use_remote_comm = false;
 609       break;
 610     default:
 611       THROW_IMPOSSIBLE;
 612   }
 613
 614   const char* type = nullptr;
 615   char* args       = nullptr;
 616
 617   smx_actor_t issuer = MC_smx_simcall_get_issuer(req);
 618
 619   switch (req->call_) {
 620     case Simcall::COMM_ISEND: {
 621       type     = "iSend";
 622       char* p  = pointer_to_string(simcall_comm_isend__get__src_buff(req));
 623       char* bs = buff_size_to_string(simcall_comm_isend__get__src_buff_size(req));
 624       if (issuer->get_host())
 625         args = bprintf("src=(%ld)%s (%s), buff=%s, size=%s", issuer->get_pid(), MC_smx_actor_get_host_name(issuer),
 626                        MC_smx_actor_get_name(issuer), p, bs);
 627       else
 628         args = bprintf("src=(%ld)%s, buff=%s, size=%s", issuer->get_pid(), MC_smx_actor_get_name(issuer), p, bs);
 629       xbt_free(bs);
 630       xbt_free(p);
 631       break;
 632     }
 633
 634     case Simcall::COMM_IRECV: {
 635       size_t* remote_size = simcall_comm_irecv__get__dst_buff_size(req);
 636       size_t size         = 0;
 637       if (remote_size)
 638         mc_model_checker->get_remote_simulation().read_bytes(&size, sizeof(size), remote(remote_size));
 639
 640       type     = "iRecv";
 641       char* p  = pointer_to_string(simcall_comm_irecv__get__dst_buff(req));
 642       char* bs = buff_size_to_string(size);
 643       if (issuer->get_host())
 644         args = bprintf("dst=(%ld)%s (%s), buff=%s, size=%s", issuer->get_pid(), MC_smx_actor_get_host_name(issuer),
 645                        MC_smx_actor_get_name(issuer), p, bs);
 646       else
 647         args = bprintf("dst=(%ld)%s, buff=%s, size=%s", issuer->get_pid(), MC_smx_actor_get_name(issuer), p, bs);
 648       xbt_free(bs);
 649       xbt_free(p);
 650       break;
 651     }
 652
 653     case Simcall::COMM_WAIT: {
 654       simgrid::kernel::activity::CommImpl* remote_act = simcall_comm_wait__getraw__comm(req);
 655       char* p;
 656       if (value == -1) {
 657         type = "WaitTimeout";
 658         p    = pointer_to_string(remote_act);
 659         args = bprintf("comm=%s", p);
 660       } else {
 661         type = "Wait";
 662         p    = pointer_to_string(remote_act);
 663
 664         simgrid::mc::Remote<simgrid::kernel::activity::CommImpl> temp_synchro;
 665         const simgrid::kernel::activity::CommImpl* act;
 666         if (use_remote_comm) {
 667           mc_model_checker->get_remote_simulation().read(temp_synchro, remote(remote_act));
 668           act = temp_synchro.get_buffer();
 669         } else
 670           act = remote_act;
 671
 672         smx_actor_t src_proc =
 673             mc_model_checker->get_remote_simulation().resolve_actor(simgrid::mc::remote(act->src_actor_.get()));
 674         smx_actor_t dst_proc =
 675             mc_model_checker->get_remote_simulation().resolve_actor(simgrid::mc::remote(act->dst_actor_.get()));
 676         args = bprintf("comm=%s [(%ld)%s (%s)-> (%ld)%s (%s)]", p, src_proc ? src_proc->get_pid() : 0,
 677                        src_proc ? MC_smx_actor_get_host_name(src_proc) : "",
 678                        src_proc ? MC_smx_actor_get_name(src_proc) : "", dst_proc ? dst_proc->get_pid() : 0,
 679                        dst_proc ? MC_smx_actor_get_host_name(dst_proc) : "",
 680                        dst_proc ? MC_smx_actor_get_name(dst_proc) : "");
 681       }
 682       xbt_free(p);
 683       break;
 684     }
 685
 686     case Simcall::COMM_TEST: {
 687       simgrid::kernel::activity::CommImpl* remote_act = simcall_comm_test__getraw__comm(req);
 688       simgrid::mc::Remote<simgrid::kernel::activity::CommImpl> temp_synchro;
 689       const simgrid::kernel::activity::CommImpl* act;
 690       if (use_remote_comm) {
 691         mc_model_checker->get_remote_simulation().read(temp_synchro, remote(remote_act));
 692         act = temp_synchro.get_buffer();
 693       } else
 694         act = remote_act;
 695
 696       char* p;
 697       if (act->src_actor_.get() == nullptr || act->dst_actor_.get() == nullptr) {
 698         type = "Test FALSE";
 699         p    = pointer_to_string(remote_act);
 700         args = bprintf("comm=%s", p);
 701       } else {
 702         type = "Test TRUE";
 703         p    = pointer_to_string(remote_act);
 704
 705         smx_actor_t src_proc =
 706             mc_model_checker->get_remote_simulation().resolve_actor(simgrid::mc::remote(act->src_actor_.get()));
 707         smx_actor_t dst_proc =
 708             mc_model_checker->get_remote_simulation().resolve_actor(simgrid::mc::remote(act->dst_actor_.get()));
 709         args = bprintf("comm=%s [(%ld)%s (%s) -> (%ld)%s (%s)]", p, src_proc->get_pid(),
 710                        MC_smx_actor_get_name(src_proc), MC_smx_actor_get_host_name(src_proc), dst_proc->get_pid(),
 711                        MC_smx_actor_get_name(dst_proc), MC_smx_actor_get_host_name(dst_proc));
 712       }
 713       xbt_free(p);
 714       break;
 715     }
 716
 717     case Simcall::COMM_WAITANY: {
 718       type         = "WaitAny";
 719       size_t count = simcall_comm_waitany__get__count(req);
 720       if (count > 0) {
 721         simgrid::kernel::activity::CommImpl* remote_sync;
 722         remote_sync =
 723             mc_model_checker->get_remote_simulation().read(remote(simcall_comm_waitany__get__comms(req) + value));
 724         char* p = pointer_to_string(remote_sync);
 725         args    = bprintf("comm=%s (%d of %zu)", p, value + 1, count);
 726         xbt_free(p);
 727       } else
 728         args = bprintf("comm at idx %d", value);
 729       break;
 730     }
 731
 732     case Simcall::COMM_TESTANY:
 733       if (value == -1) {
 734         type = "TestAny FALSE";
 735         args = xbt_strdup("-");
 736       } else {
 737         type = "TestAny";
 738         args = bprintf("(%d of %zu)", value + 1, simcall_comm_testany__get__count(req));
 739       }
 740       break;
 741
 742     case Simcall::MUTEX_TRYLOCK:
 743     case Simcall::MUTEX_LOCK: {
 744       if (req->call_ == Simcall::MUTEX_LOCK)
 745         type = "Mutex LOCK";
 746       else
 747         type = "Mutex TRYLOCK";
 748
 749       simgrid::mc::Remote<simgrid::kernel::activity::MutexImpl> mutex;
 750       mc_model_checker->get_remote_simulation().read_bytes(mutex.get_buffer(), sizeof(mutex),
 751                                                            remote(req->call_ == Simcall::MUTEX_LOCK
 752                                                                       ? simcall_mutex_lock__get__mutex(req)
 753                                                                       : simcall_mutex_trylock__get__mutex(req)));
 754       args = bprintf("locked = %d, owner = %d, sleeping = n/a", mutex.get_buffer()->is_locked(),
 755                      mutex.get_buffer()->get_owner() != nullptr
 756                          ? (int)mc_model_checker->get_remote_simulation()
 757                                .resolve_actor(simgrid::mc::remote(mutex.get_buffer()->get_owner()))
 758                                ->get_pid()
 759                          : -1);
 760       break;
 761     }
 762
 763     case Simcall::MC_RANDOM:
 764       type = "MC_RANDOM";
 765       args = bprintf("%d", value);
 766       break;
 767
 768     default:
 769       type = SIMIX_simcall_name(req->call_);
 770       args = bprintf("??");
 771       break;
 772   }
 773
 774   std::string str;
 775   if (args != nullptr)
 776     str = simgrid::xbt::string_printf("[(%ld)%s (%s)] %s(%s)", issuer->get_pid(), MC_smx_actor_get_host_name(issuer),
 777                                       MC_smx_actor_get_name(issuer), type, args);
 778   else
 779     str = simgrid::xbt::string_printf("[(%ld)%s (%s)] %s ", issuer->get_pid(), MC_smx_actor_get_host_name(issuer),
 780                                       MC_smx_actor_get_name(issuer), type);
 781   xbt_free(args);
 782   return str;
 783 }
 784
 785 std::string Api::request_get_dot_output(smx_simcall_t req, int value) const
 786 {
 787   const smx_actor_t issuer = MC_smx_simcall_get_issuer(req);
 788   const char* color        = get_color(issuer->get_pid() - 1);
 789
 790   if (req->inspector_ != nullptr)
 791     return simgrid::xbt::string_printf("label = \"%s\", color = %s, fontcolor = %s",
 792                                        req->inspector_->dot_label().c_str(), color, color);
 793
 794   std::string label;
 795
 796   switch (req->call_) {
 797     case Simcall::COMM_ISEND:
 798       if (issuer->get_host())
 799         label = xbt::string_printf("[(%ld)%s] iSend", issuer->get_pid(), MC_smx_actor_get_host_name(issuer));
 800       else
 801         label = bprintf("[(%ld)] iSend", issuer->get_pid());
 802       break;
 803
 804     case Simcall::COMM_IRECV:
 805       if (issuer->get_host())
 806         label = xbt::string_printf("[(%ld)%s] iRecv", issuer->get_pid(), MC_smx_actor_get_host_name(issuer));
 807       else
 808         label = xbt::string_printf("[(%ld)] iRecv", issuer->get_pid());
 809       break;
 810
 811     case Simcall::COMM_WAIT:
 812       if (value == -1) {
 813         if (issuer->get_host())
 814           label = xbt::string_printf("[(%ld)%s] WaitTimeout", issuer->get_pid(), MC_smx_actor_get_host_name(issuer));
 815         else
 816           label = xbt::string_printf("[(%ld)] WaitTimeout", issuer->get_pid());
 817       } else {
 818         kernel::activity::ActivityImpl* remote_act = simcall_comm_wait__getraw__comm(req);
 819         Remote<kernel::activity::CommImpl> temp_comm;
 820         mc_model_checker->get_remote_simulation().read(temp_comm,
 821                                                        remote(static_cast<kernel::activity::CommImpl*>(remote_act)));
 822         const kernel::activity::CommImpl* comm = temp_comm.get_buffer();
 823
 824         const kernel::actor::ActorImpl* src_proc =
 825             mc_model_checker->get_remote_simulation().resolve_actor(mc::remote(comm->src_actor_.get()));
 826         const kernel::actor::ActorImpl* dst_proc =
 827             mc_model_checker->get_remote_simulation().resolve_actor(mc::remote(comm->dst_actor_.get()));
 828         if (issuer->get_host())
 829           label =
 830               xbt::string_printf("[(%ld)%s] Wait [(%ld)->(%ld)]", issuer->get_pid(), MC_smx_actor_get_host_name(issuer),
 831                                  src_proc ? src_proc->get_pid() : 0, dst_proc ? dst_proc->get_pid() : 0);
 832         else
 833           label = xbt::string_printf("[(%ld)] Wait [(%ld)->(%ld)]", issuer->get_pid(),
 834                                      src_proc ? src_proc->get_pid() : 0, dst_proc ? dst_proc->get_pid() : 0);
 835       }
 836       break;
 837
 838     case Simcall::COMM_TEST: {
 839       kernel::activity::ActivityImpl* remote_act = simcall_comm_test__getraw__comm(req);
 840       Remote<simgrid::kernel::activity::CommImpl> temp_comm;
 841       mc_model_checker->get_remote_simulation().read(temp_comm,
 842                                                      remote(static_cast<kernel::activity::CommImpl*>(remote_act)));
 843       const kernel::activity::CommImpl* comm = temp_comm.get_buffer();
 844       if (comm->src_actor_.get() == nullptr || comm->dst_actor_.get() == nullptr) {
 845         if (issuer->get_host())
 846           label = xbt::string_printf("[(%ld)%s] Test FALSE", issuer->get_pid(), MC_smx_actor_get_host_name(issuer));
 847         else
 848           label = bprintf("[(%ld)] Test FALSE", issuer->get_pid());
 849       } else {
 850         if (issuer->get_host())
 851           label = xbt::string_printf("[(%ld)%s] Test TRUE", issuer->get_pid(), MC_smx_actor_get_host_name(issuer));
 852         else
 853           label = xbt::string_printf("[(%ld)] Test TRUE", issuer->get_pid());
 854       }
 855       break;
 856     }
 857
 858     case Simcall::COMM_WAITANY: {
 859       size_t comms_size = simcall_comm_waitany__get__count(req);
 860       if (issuer->get_host())
 861         label = xbt::string_printf("[(%ld)%s] WaitAny [%d of %zu]", issuer->get_pid(),
 862                                    MC_smx_actor_get_host_name(issuer), value + 1, comms_size);
 863       else
 864         label = xbt::string_printf("[(%ld)] WaitAny [%d of %zu]", issuer->get_pid(), value + 1, comms_size);
 865       break;
 866     }
 867
 868     case Simcall::COMM_TESTANY:
 869       if (value == -1) {
 870         if (issuer->get_host())
 871           label = xbt::string_printf("[(%ld)%s] TestAny FALSE", issuer->get_pid(), MC_smx_actor_get_host_name(issuer));
 872         else
 873           label = xbt::string_printf("[(%ld)] TestAny FALSE", issuer->get_pid());
 874       } else {
 875         if (issuer->get_host())
 876           label =
 877               xbt::string_printf("[(%ld)%s] TestAny TRUE [%d of %lu]", issuer->get_pid(),
 878                                  MC_smx_actor_get_host_name(issuer), value + 1, simcall_comm_testany__get__count(req));
 879         else
 880           label = xbt::string_printf("[(%ld)] TestAny TRUE [%d of %lu]", issuer->get_pid(), value + 1,
 881                                      simcall_comm_testany__get__count(req));
 882       }
 883       break;
 884
 885     case Simcall::MUTEX_TRYLOCK:
 886       label = xbt::string_printf("[(%ld)] Mutex TRYLOCK", issuer->get_pid());
 887       break;
 888
 889     case Simcall::MUTEX_LOCK:
 890       label = xbt::string_printf("[(%ld)] Mutex LOCK", issuer->get_pid());
 891       break;
 892
 893     case Simcall::MC_RANDOM:
 894       if (issuer->get_host())
 895         label = xbt::string_printf("[(%ld)%s] MC_RANDOM (%d)", issuer->get_pid(), MC_smx_actor_get_host_name(issuer),
 896                                    value);
 897       else
 898         label = xbt::string_printf("[(%ld)] MC_RANDOM (%d)", issuer->get_pid(), value);
 899       break;
 900
 901     default:
 902       THROW_UNIMPLEMENTED;
 903   }
 904
 905   return xbt::string_printf("label = \"%s\", color = %s, fontcolor = %s", label.c_str(), color, color);
 906 }
 907
 908 const char* Api::simcall_get_name(simgrid::simix::Simcall kind) const
 909 {
 910   return SIMIX_simcall_name(kind);
 911 }
 912
 913 #if HAVE_SMPI
 914 int Api::get_smpi_request_tag(smx_simcall_t const& simcall, simgrid::simix::Simcall type) const
 915 {
 916   simgrid::smpi::Request mpi_request;
 917   void* simcall_data = nullptr;
 918   if (type == Simcall::COMM_ISEND)
 919     simcall_data = simcall_comm_isend__get__data(simcall);
 920   else if (type == Simcall::COMM_IRECV)
 921     simcall_data = simcall_comm_irecv__get__data(simcall);
 922   mc_model_checker->get_remote_simulation().read(&mpi_request, remote(static_cast<smpi::Request*>(simcall_data)));
 923   return mpi_request.tag();
 924 }
 925 #endif
 926
 927 void Api::restore_state(std::shared_ptr<simgrid::mc::Snapshot> system_state) const
 928 {
 929   system_state->restore(&mc_model_checker->get_remote_simulation());
 930 }
 931
 932 void Api::log_state() const
 933 {
 934   session->log_state();
 935 }
 936
 937 bool Api::snapshot_equal(const Snapshot* s1, const Snapshot* s2) const
 938 {
 939   return simgrid::mc::snapshot_equal(s1, s2);
 940 }
 941
 942 simgrid::mc::Snapshot* Api::take_snapshot(int num_state) const
 943 {
 944   auto snapshot = new simgrid::mc::Snapshot(num_state);
 945   return snapshot;
 946 }
 947
 948 void Api::s_close() const
 949 {
 950   session->close();
 951 }
 952
 953 void Api::restore_initial_state() const
 954 {
 955   session->restore_initial_state();
 956 }
 957
 958 void Api::execute(Transition const& transition) const
 959 {
 960   session->execute(transition);
 961 }
 962
 963 #if SIMGRID_HAVE_MC
 964 void Api::automaton_load(const char* file) const
 965 {
 966   MC_automaton_load(file);
 967 }
 968 #endif
 969
 970 std::vector<int> Api::automaton_propositional_symbol_evaluate() const
 971 {
 972   unsigned int cursor = 0;
 973   std::vector<int> values;
 974   xbt_automaton_propositional_symbol_t ps = nullptr;
 975   xbt_dynar_foreach (mc::property_automaton->propositional_symbols, cursor, ps)
 976     values.push_back(xbt_automaton_propositional_symbol_evaluate(ps));
 977   return values;
 978 }
 979
 980 std::vector<xbt_automaton_state_t> Api::get_automaton_state() const
 981 {
 982   std::vector<xbt_automaton_state_t> automaton_stack;
 983   unsigned int cursor = 0;
 984   xbt_automaton_state_t automaton_state;
 985   xbt_dynar_foreach (mc::property_automaton->states, cursor, automaton_state)
 986     if (automaton_state->type == -1)
 987       automaton_stack.push_back(automaton_state);
 988   return automaton_stack;
 989 }
 990
 991 int Api::compare_automaton_exp_label(const xbt_automaton_exp_label* l) const
 992 {
 993   unsigned int cursor                    = 0;
 994   xbt_automaton_propositional_symbol_t p = nullptr;
 995   xbt_dynar_foreach (simgrid::mc::property_automaton->propositional_symbols, cursor, p) {
 996     if (std::strcmp(xbt_automaton_propositional_symbol_get_name(p), l->u.predicat) == 0)
 997       return cursor;
 998   }
 999   return -1;
1000 }
1001
1002 void Api::set_property_automaton(xbt_automaton_state_t const& automaton_state) const
1003 {
1004   mc::property_automaton->current_state = automaton_state;
1005 }
1006
1007 xbt_automaton_exp_label_t Api::get_automaton_transition_label(xbt_dynar_t const& dynar, int index) const
1008 {
1009   const xbt_automaton_transition* transition = xbt_dynar_get_as(dynar, index, xbt_automaton_transition_t);
1010   return transition->label;
1011 }
1012
1013 xbt_automaton_state_t Api::get_automaton_transition_dst(xbt_dynar_t const& dynar, int index) const
1014 {
1015   const xbt_automaton_transition* transition = xbt_dynar_get_as(dynar, index, xbt_automaton_transition_t);
1016   return transition->dst;
1017 }
1018
1019 } // namespace mc
1020 } // namespace simgrid