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 RemotePtr<kernel::activity::CommImpl> Api::get_comm_isend_raw_addr(smx_simcall_t request) const
 326 {
 327   auto comm_addr = simgrid::simix::unmarshal_raw<simgrid::kernel::activity::ActivityImpl*>(request->result_);
 328   return RemotePtr<kernel::activity::CommImpl>(static_cast<kernel::activity::CommImpl*>(comm_addr));
 329 }
 330
 331 RemotePtr<kernel::activity::CommImpl> Api::get_comm_wait_raw_addr(smx_simcall_t request) const
 332 {
 333   auto comm_addr = simgrid::simix::unmarshal_raw<simgrid::kernel::activity::CommImpl*>(request->args_[0]);
 334   return RemotePtr<kernel::activity::CommImpl>(static_cast<kernel::activity::CommImpl*>(comm_addr));
 335 }
 336
 337 RemotePtr<kernel::activity::CommImpl> Api::get_comm_waitany_raw_addr(smx_simcall_t request, int value) const
 338 {
 339   auto addr = simgrid::simix::unmarshal_raw<simgrid::kernel::activity::CommImpl**>(request->args_[0]) + value;
 340   auto comm_addr = mc_model_checker->get_remote_simulation().read(remote(addr));
 341   return RemotePtr<kernel::activity::CommImpl>(static_cast<kernel::activity::CommImpl*>(comm_addr));
 342 }
 343
 344 std::string Api::get_pattern_comm_rdv(RemotePtr<kernel::activity::CommImpl> const& addr) const
 345 {
 346   Remote<kernel::activity::CommImpl> temp_synchro;
 347   mc_model_checker->get_remote_simulation().read(temp_synchro, remote(addr.local()));
 348   const kernel::activity::CommImpl* synchro = temp_synchro.get_buffer();
 349
 350   char* remote_name = mc_model_checker->get_remote_simulation().read<char*>(RemotePtr<char*>(
 351       (uint64_t)(synchro->get_mailbox() ? &synchro->get_mailbox()->get_name() : &synchro->mbox_cpy->get_name())));
 352   auto rdv          = mc_model_checker->get_remote_simulation().read_string(RemotePtr<char>(remote_name));
 353   return rdv;
 354 }
 355
 356 unsigned long Api::get_pattern_comm_src_proc(RemotePtr<kernel::activity::CommImpl> const& addr) const
 357 {
 358   Remote<kernel::activity::CommImpl> temp_synchro;
 359   mc_model_checker->get_remote_simulation().read(temp_synchro, remote(addr.local()));
 360   const kernel::activity::CommImpl* synchro = temp_synchro.get_buffer();
 361   auto src_proc =
 362       mc_model_checker->get_remote_simulation().resolve_actor(mc::remote(synchro->src_actor_.get()))->get_pid();
 363   return src_proc;
 364 }
 365
 366 unsigned long Api::get_pattern_comm_dst_proc(RemotePtr<kernel::activity::CommImpl> const& addr) const
 367 {
 368   Remote<kernel::activity::CommImpl> temp_synchro;
 369   mc_model_checker->get_remote_simulation().read(temp_synchro, remote(addr.local()));
 370   const kernel::activity::CommImpl* synchro = temp_synchro.get_buffer();
 371   auto src_proc =
 372       mc_model_checker->get_remote_simulation().resolve_actor(mc::remote(synchro->dst_actor_.get()))->get_pid();
 373   return src_proc;
 374 }
 375
 376 std::vector<char> Api::get_pattern_comm_data(RemotePtr<kernel::activity::CommImpl> const& addr) const
 377 {
 378   simgrid::mc::Remote<simgrid::kernel::activity::CommImpl> temp_comm;
 379   mc_model_checker->get_remote_simulation().read(temp_comm, remote((addr.local())));
 380   const simgrid::kernel::activity::CommImpl* comm = temp_comm.get_buffer();
 381
 382   std::vector<char> buffer{};
 383   if (comm->src_buff_ != nullptr) {
 384     buffer.resize(comm->src_buff_size_);
 385     mc_model_checker->get_remote_simulation().read_bytes(buffer.data(), buffer.size(), remote(comm->src_buff_));
 386   }
 387   return buffer;
 388 }
 389
 390 const char* Api::get_actor_host_name(smx_actor_t actor) const
 391 {
 392   const char* host_name = MC_smx_actor_get_host_name(actor);
 393   return host_name;
 394 }
 395
 396 #if HAVE_SMPI
 397 bool Api::check_send_request_detached(smx_simcall_t const& simcall) const
 398 {
 399   simgrid::smpi::Request mpi_request;
 400   mc_model_checker->get_remote_simulation().read(
 401       &mpi_request, remote(static_cast<smpi::Request*>(simcall_comm_isend__get__data(simcall))));
 402   return mpi_request.detached();
 403 }
 404 #endif
 405
 406 smx_actor_t Api::get_src_actor(const kernel::activity::CommImpl* comm_addr) const
 407 {
 408   simgrid::mc::Remote<simgrid::kernel::activity::CommImpl> temp_comm;
 409   mc_model_checker->get_remote_simulation().read(temp_comm, remote((kernel::activity::CommImpl*)comm_addr));
 410   const simgrid::kernel::activity::CommImpl* comm = temp_comm.get_buffer();
 411
 412   auto src_proc = mc_model_checker->get_remote_simulation().resolve_actor(simgrid::mc::remote(comm->src_actor_.get()));
 413   return src_proc;
 414 }
 415
 416 smx_actor_t Api::get_dst_actor(const kernel::activity::CommImpl* comm_addr) const
 417 {
 418   simgrid::mc::Remote<simgrid::kernel::activity::CommImpl> temp_comm;
 419   mc_model_checker->get_remote_simulation().read(temp_comm, remote((kernel::activity::CommImpl*)comm_addr));
 420   const simgrid::kernel::activity::CommImpl* comm = temp_comm.get_buffer();
 421
 422   auto dst_proc = mc_model_checker->get_remote_simulation().resolve_actor(simgrid::mc::remote(comm->dst_actor_.get()));
 423   return dst_proc;
 424 }
 425
 426 std::size_t Api::get_remote_heap_bytes() const
 427 {
 428   RemoteSimulation& process = mc_model_checker->get_remote_simulation();
 429   auto heap_bytes_used      = mmalloc_get_bytes_used_remote(process.get_heap()->heaplimit, process.get_malloc_info());
 430   return heap_bytes_used;
 431 }
 432
 433 void Api::session_initialize() const
 434 {
 435   session->initialize();
 436 }
 437
 438 void Api::mc_inc_visited_states() const
 439 {
 440   mc_model_checker->visited_states++;
 441 }
 442
 443 void Api::mc_inc_executed_trans() const
 444 {
 445   mc_model_checker->executed_transitions++;
 446 }
 447
 448 unsigned long Api::mc_get_visited_states() const
 449 {
 450   return mc_model_checker->visited_states;
 451 }
 452
 453 unsigned long Api::mc_get_executed_trans() const
 454 {
 455   return mc_model_checker->executed_transitions;
 456 }
 457
 458 bool Api::mc_check_deadlock() const
 459 {
 460   return mc_model_checker->checkDeadlock();
 461 }
 462
 463 void Api::mc_show_deadlock() const
 464 {
 465   MC_show_deadlock();
 466 }
 467
 468 smx_actor_t Api::simcall_get_issuer(s_smx_simcall const* req) const
 469 {
 470   return MC_smx_simcall_get_issuer(req);
 471 }
 472
 473 long Api::simcall_get_actor_id(s_smx_simcall const* req) const
 474 {
 475   return MC_smx_simcall_get_issuer(req)->get_pid();
 476 }
 477
 478 smx_mailbox_t Api::simcall_get_mbox(smx_simcall_t const req) const
 479 {
 480   return get_mbox(req);
 481 }
 482
 483 bool Api::mc_is_null() const
 484 {
 485   auto is_null = (mc_model_checker == nullptr) ? true : false;
 486   return is_null;
 487 }
 488
 489 Checker* Api::mc_get_checker() const
 490 {
 491   return mc_model_checker->getChecker();
 492 }
 493
 494 void Api::set_checker(Checker* const checker) const
 495 {
 496   xbt_assert(mc_model_checker);
 497   xbt_assert(mc_model_checker->getChecker() == nullptr);
 498   mc_model_checker->setChecker(checker);
 499 }
 500
 501 void Api::handle_simcall(Transition const& transition) const
 502 {
 503   mc_model_checker->handle_simcall(transition);
 504 }
 505
 506 void Api::mc_wait_for_requests() const
 507 {
 508   mc_model_checker->wait_for_requests();
 509 }
 510
 511 void Api::mc_exit(int status) const
 512 {
 513   mc_model_checker->exit(status);
 514 }
 515
 516 std::string const& Api::mc_get_host_name(std::string const& hostname) const
 517 {
 518   return mc_model_checker->get_host_name(hostname);
 519 }
 520
 521 void Api::dump_record_path() const
 522 {
 523   simgrid::mc::dumpRecordPath();
 524 }
 525
 526 smx_simcall_t Api::mc_state_choose_request(simgrid::mc::State* state) const
 527 {
 528   for (auto& actor : mc_model_checker->get_remote_simulation().actors()) {
 529     /* Only consider the actors that were marked as interleaving by the checker algorithm */
 530     if (not state->actor_states_[actor.copy.get_buffer()->get_pid()].is_todo())
 531       continue;
 532
 533     smx_simcall_t res = MC_state_choose_request_for_process(state, actor.copy.get_buffer());
 534     if (res)
 535       return res;
 536   }
 537   return nullptr;
 538 }
 539
 540 bool Api::simcall_check_dependency(smx_simcall_t const req1, smx_simcall_t const req2) const
 541 {
 542   if (req1->issuer_ == req2->issuer_)
 543     return false;
 544
 545   /* Wait with timeout transitions are not considered by the independence theorem, thus we consider them as dependent with all other transitions */
 546   if ((req1->call_ == Simcall::COMM_WAIT && simcall_comm_wait__get__timeout(req1) > 0) ||
 547       (req2->call_ == Simcall::COMM_WAIT && simcall_comm_wait__get__timeout(req2) > 0))
 548     return true;
 549
 550   if (req1->call_ != req2->call_)
 551     return request_depend_asymmetric(req1, req2) && request_depend_asymmetric(req2, req1);
 552
 553   // Those are internal requests, we do not need indirection because those objects are copies:
 554   const kernel::activity::CommImpl* synchro1 = get_comm(req1);
 555   const kernel::activity::CommImpl* synchro2 = get_comm(req2);
 556
 557   switch (req1->call_) {
 558     case Simcall::COMM_ISEND:
 559       return simcall_comm_isend__get__mbox(req1) == simcall_comm_isend__get__mbox(req2);
 560     case Simcall::COMM_IRECV:
 561       return simcall_comm_irecv__get__mbox(req1) == simcall_comm_irecv__get__mbox(req2);
 562     case Simcall::COMM_WAIT:
 563       if (synchro1->src_buff_ == synchro2->src_buff_ && synchro1->dst_buff_ == synchro2->dst_buff_)
 564         return false;
 565       if (synchro1->src_buff_ != nullptr && synchro1->dst_buff_ != nullptr && synchro2->src_buff_ != nullptr &&
 566           synchro2->dst_buff_ != nullptr && synchro1->dst_buff_ != synchro2->src_buff_ &&
 567           synchro1->dst_buff_ != synchro2->dst_buff_ && synchro2->dst_buff_ != synchro1->src_buff_)
 568         return false;
 569       return true;
 570     default:
 571       return true;
 572   }
 573 }
 574
 575 std::string Api::request_to_string(smx_simcall_t req, int value, RequestType request_type) const
 576 {
 577   xbt_assert(mc_model_checker != nullptr, "Must be called from MCer");
 578
 579   if (req->inspector_ != nullptr)
 580     return req->inspector_->to_string();
 581
 582   bool use_remote_comm = true;
 583   switch (request_type) {
 584     case simgrid::mc::RequestType::simix:
 585       use_remote_comm = true;
 586       break;
 587     case simgrid::mc::RequestType::executed:
 588     case simgrid::mc::RequestType::internal:
 589       use_remote_comm = false;
 590       break;
 591     default:
 592       THROW_IMPOSSIBLE;
 593   }
 594
 595   const char* type = nullptr;
 596   char* args       = nullptr;
 597
 598   smx_actor_t issuer = MC_smx_simcall_get_issuer(req);
 599
 600   switch (req->call_) {
 601     case Simcall::COMM_ISEND: {
 602       type     = "iSend";
 603       char* p  = pointer_to_string(simcall_comm_isend__get__src_buff(req));
 604       char* bs = buff_size_to_string(simcall_comm_isend__get__src_buff_size(req));
 605       if (issuer->get_host())
 606         args = bprintf("src=(%ld)%s (%s), buff=%s, size=%s", issuer->get_pid(), MC_smx_actor_get_host_name(issuer),
 607                        MC_smx_actor_get_name(issuer), p, bs);
 608       else
 609         args = bprintf("src=(%ld)%s, buff=%s, size=%s", issuer->get_pid(), MC_smx_actor_get_name(issuer), p, bs);
 610       xbt_free(bs);
 611       xbt_free(p);
 612       break;
 613     }
 614
 615     case Simcall::COMM_IRECV: {
 616       size_t* remote_size = simcall_comm_irecv__get__dst_buff_size(req);
 617       size_t size         = 0;
 618       if (remote_size)
 619         mc_model_checker->get_remote_simulation().read_bytes(&size, sizeof(size), remote(remote_size));
 620
 621       type     = "iRecv";
 622       char* p  = pointer_to_string(simcall_comm_irecv__get__dst_buff(req));
 623       char* bs = buff_size_to_string(size);
 624       if (issuer->get_host())
 625         args = bprintf("dst=(%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("dst=(%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_WAIT: {
 635       simgrid::kernel::activity::CommImpl* remote_act = simcall_comm_wait__getraw__comm(req);
 636       char* p;
 637       if (value == -1) {
 638         type = "WaitTimeout";
 639         p    = pointer_to_string(remote_act);
 640         args = bprintf("comm=%s", p);
 641       } else {
 642         type = "Wait";
 643         p    = pointer_to_string(remote_act);
 644
 645         simgrid::mc::Remote<simgrid::kernel::activity::CommImpl> temp_synchro;
 646         const simgrid::kernel::activity::CommImpl* act;
 647         if (use_remote_comm) {
 648           mc_model_checker->get_remote_simulation().read(temp_synchro, remote(remote_act));
 649           act = temp_synchro.get_buffer();
 650         } else
 651           act = remote_act;
 652
 653         smx_actor_t src_proc =
 654             mc_model_checker->get_remote_simulation().resolve_actor(simgrid::mc::remote(act->src_actor_.get()));
 655         smx_actor_t dst_proc =
 656             mc_model_checker->get_remote_simulation().resolve_actor(simgrid::mc::remote(act->dst_actor_.get()));
 657         args = bprintf("comm=%s [(%ld)%s (%s)-> (%ld)%s (%s)]", p, src_proc ? src_proc->get_pid() : 0,
 658                        src_proc ? MC_smx_actor_get_host_name(src_proc) : "",
 659                        src_proc ? MC_smx_actor_get_name(src_proc) : "", dst_proc ? dst_proc->get_pid() : 0,
 660                        dst_proc ? MC_smx_actor_get_host_name(dst_proc) : "",
 661                        dst_proc ? MC_smx_actor_get_name(dst_proc) : "");
 662       }
 663       xbt_free(p);
 664       break;
 665     }
 666
 667     case Simcall::COMM_TEST: {
 668       simgrid::kernel::activity::CommImpl* remote_act = simcall_comm_test__getraw__comm(req);
 669       simgrid::mc::Remote<simgrid::kernel::activity::CommImpl> temp_synchro;
 670       const simgrid::kernel::activity::CommImpl* act;
 671       if (use_remote_comm) {
 672         mc_model_checker->get_remote_simulation().read(temp_synchro, remote(remote_act));
 673         act = temp_synchro.get_buffer();
 674       } else
 675         act = remote_act;
 676
 677       char* p;
 678       if (act->src_actor_.get() == nullptr || act->dst_actor_.get() == nullptr) {
 679         type = "Test FALSE";
 680         p    = pointer_to_string(remote_act);
 681         args = bprintf("comm=%s", p);
 682       } else {
 683         type = "Test TRUE";
 684         p    = pointer_to_string(remote_act);
 685
 686         smx_actor_t src_proc =
 687             mc_model_checker->get_remote_simulation().resolve_actor(simgrid::mc::remote(act->src_actor_.get()));
 688         smx_actor_t dst_proc =
 689             mc_model_checker->get_remote_simulation().resolve_actor(simgrid::mc::remote(act->dst_actor_.get()));
 690         args = bprintf("comm=%s [(%ld)%s (%s) -> (%ld)%s (%s)]", p, src_proc->get_pid(),
 691                        MC_smx_actor_get_name(src_proc), MC_smx_actor_get_host_name(src_proc), dst_proc->get_pid(),
 692                        MC_smx_actor_get_name(dst_proc), MC_smx_actor_get_host_name(dst_proc));
 693       }
 694       xbt_free(p);
 695       break;
 696     }
 697
 698     case Simcall::COMM_WAITANY: {
 699       type         = "WaitAny";
 700       size_t count = simcall_comm_waitany__get__count(req);
 701       if (count > 0) {
 702         simgrid::kernel::activity::CommImpl* remote_sync;
 703         remote_sync =
 704             mc_model_checker->get_remote_simulation().read(remote(simcall_comm_waitany__get__comms(req) + value));
 705         char* p = pointer_to_string(remote_sync);
 706         args    = bprintf("comm=%s (%d of %zu)", p, value + 1, count);
 707         xbt_free(p);
 708       } else
 709         args = bprintf("comm at idx %d", value);
 710       break;
 711     }
 712
 713     case Simcall::COMM_TESTANY:
 714       if (value == -1) {
 715         type = "TestAny FALSE";
 716         args = xbt_strdup("-");
 717       } else {
 718         type = "TestAny";
 719         args = bprintf("(%d of %zu)", value + 1, simcall_comm_testany__get__count(req));
 720       }
 721       break;
 722
 723     case Simcall::MUTEX_TRYLOCK:
 724     case Simcall::MUTEX_LOCK: {
 725       if (req->call_ == Simcall::MUTEX_LOCK)
 726         type = "Mutex LOCK";
 727       else
 728         type = "Mutex TRYLOCK";
 729
 730       simgrid::mc::Remote<simgrid::kernel::activity::MutexImpl> mutex;
 731       mc_model_checker->get_remote_simulation().read_bytes(mutex.get_buffer(), sizeof(mutex),
 732                                                            remote(req->call_ == Simcall::MUTEX_LOCK
 733                                                                       ? simcall_mutex_lock__get__mutex(req)
 734                                                                       : simcall_mutex_trylock__get__mutex(req)));
 735       args = bprintf("locked = %d, owner = %d, sleeping = n/a", mutex.get_buffer()->is_locked(),
 736                      mutex.get_buffer()->get_owner() != nullptr
 737                          ? (int)mc_model_checker->get_remote_simulation()
 738                                .resolve_actor(simgrid::mc::remote(mutex.get_buffer()->get_owner()))
 739                                ->get_pid()
 740                          : -1);
 741       break;
 742     }
 743
 744     case Simcall::MC_RANDOM:
 745       type = "MC_RANDOM";
 746       args = bprintf("%d", value);
 747       break;
 748
 749     default:
 750       type = SIMIX_simcall_name(req->call_);
 751       args = bprintf("??");
 752       break;
 753   }
 754
 755   std::string str;
 756   if (args != nullptr)
 757     str = simgrid::xbt::string_printf("[(%ld)%s (%s)] %s(%s)", issuer->get_pid(), MC_smx_actor_get_host_name(issuer),
 758                                       MC_smx_actor_get_name(issuer), type, args);
 759   else
 760     str = simgrid::xbt::string_printf("[(%ld)%s (%s)] %s ", issuer->get_pid(), MC_smx_actor_get_host_name(issuer),
 761                                       MC_smx_actor_get_name(issuer), type);
 762   xbt_free(args);
 763   return str;
 764 }
 765
 766 std::string Api::request_get_dot_output(smx_simcall_t req, int value) const
 767 {
 768   const smx_actor_t issuer = MC_smx_simcall_get_issuer(req);
 769   const char* color        = get_color(issuer->get_pid() - 1);
 770
 771   if (req->inspector_ != nullptr)
 772     return simgrid::xbt::string_printf("label = \"%s\", color = %s, fontcolor = %s",
 773                                        req->inspector_->dot_label().c_str(), color, color);
 774
 775   std::string label;
 776
 777   switch (req->call_) {
 778     case Simcall::COMM_ISEND:
 779       if (issuer->get_host())
 780         label = xbt::string_printf("[(%ld)%s] iSend", issuer->get_pid(), MC_smx_actor_get_host_name(issuer));
 781       else
 782         label = bprintf("[(%ld)] iSend", issuer->get_pid());
 783       break;
 784
 785     case Simcall::COMM_IRECV:
 786       if (issuer->get_host())
 787         label = xbt::string_printf("[(%ld)%s] iRecv", issuer->get_pid(), MC_smx_actor_get_host_name(issuer));
 788       else
 789         label = xbt::string_printf("[(%ld)] iRecv", issuer->get_pid());
 790       break;
 791
 792     case Simcall::COMM_WAIT:
 793       if (value == -1) {
 794         if (issuer->get_host())
 795           label = xbt::string_printf("[(%ld)%s] WaitTimeout", issuer->get_pid(), MC_smx_actor_get_host_name(issuer));
 796         else
 797           label = xbt::string_printf("[(%ld)] WaitTimeout", issuer->get_pid());
 798       } else {
 799         kernel::activity::ActivityImpl* remote_act = simcall_comm_wait__getraw__comm(req);
 800         Remote<kernel::activity::CommImpl> temp_comm;
 801         mc_model_checker->get_remote_simulation().read(temp_comm,
 802                                                        remote(static_cast<kernel::activity::CommImpl*>(remote_act)));
 803         const kernel::activity::CommImpl* comm = temp_comm.get_buffer();
 804
 805         const kernel::actor::ActorImpl* src_proc =
 806             mc_model_checker->get_remote_simulation().resolve_actor(mc::remote(comm->src_actor_.get()));
 807         const kernel::actor::ActorImpl* dst_proc =
 808             mc_model_checker->get_remote_simulation().resolve_actor(mc::remote(comm->dst_actor_.get()));
 809         if (issuer->get_host())
 810           label =
 811               xbt::string_printf("[(%ld)%s] Wait [(%ld)->(%ld)]", issuer->get_pid(), MC_smx_actor_get_host_name(issuer),
 812                                  src_proc ? src_proc->get_pid() : 0, dst_proc ? dst_proc->get_pid() : 0);
 813         else
 814           label = xbt::string_printf("[(%ld)] Wait [(%ld)->(%ld)]", issuer->get_pid(),
 815                                      src_proc ? src_proc->get_pid() : 0, dst_proc ? dst_proc->get_pid() : 0);
 816       }
 817       break;
 818
 819     case Simcall::COMM_TEST: {
 820       kernel::activity::ActivityImpl* remote_act = simcall_comm_test__getraw__comm(req);
 821       Remote<simgrid::kernel::activity::CommImpl> temp_comm;
 822       mc_model_checker->get_remote_simulation().read(temp_comm,
 823                                                      remote(static_cast<kernel::activity::CommImpl*>(remote_act)));
 824       const kernel::activity::CommImpl* comm = temp_comm.get_buffer();
 825       if (comm->src_actor_.get() == nullptr || comm->dst_actor_.get() == nullptr) {
 826         if (issuer->get_host())
 827           label = xbt::string_printf("[(%ld)%s] Test FALSE", issuer->get_pid(), MC_smx_actor_get_host_name(issuer));
 828         else
 829           label = bprintf("[(%ld)] Test FALSE", issuer->get_pid());
 830       } else {
 831         if (issuer->get_host())
 832           label = xbt::string_printf("[(%ld)%s] Test TRUE", issuer->get_pid(), MC_smx_actor_get_host_name(issuer));
 833         else
 834           label = xbt::string_printf("[(%ld)] Test TRUE", issuer->get_pid());
 835       }
 836       break;
 837     }
 838
 839     case Simcall::COMM_WAITANY: {
 840       size_t comms_size = simcall_comm_waitany__get__count(req);
 841       if (issuer->get_host())
 842         label = xbt::string_printf("[(%ld)%s] WaitAny [%d of %zu]", issuer->get_pid(),
 843                                    MC_smx_actor_get_host_name(issuer), value + 1, comms_size);
 844       else
 845         label = xbt::string_printf("[(%ld)] WaitAny [%d of %zu]", issuer->get_pid(), value + 1, comms_size);
 846       break;
 847     }
 848
 849     case Simcall::COMM_TESTANY:
 850       if (value == -1) {
 851         if (issuer->get_host())
 852           label = xbt::string_printf("[(%ld)%s] TestAny FALSE", issuer->get_pid(), MC_smx_actor_get_host_name(issuer));
 853         else
 854           label = xbt::string_printf("[(%ld)] TestAny FALSE", issuer->get_pid());
 855       } else {
 856         if (issuer->get_host())
 857           label =
 858               xbt::string_printf("[(%ld)%s] TestAny TRUE [%d of %lu]", issuer->get_pid(),
 859                                  MC_smx_actor_get_host_name(issuer), value + 1, simcall_comm_testany__get__count(req));
 860         else
 861           label = xbt::string_printf("[(%ld)] TestAny TRUE [%d of %lu]", issuer->get_pid(), value + 1,
 862                                      simcall_comm_testany__get__count(req));
 863       }
 864       break;
 865
 866     case Simcall::MUTEX_TRYLOCK:
 867       label = xbt::string_printf("[(%ld)] Mutex TRYLOCK", issuer->get_pid());
 868       break;
 869
 870     case Simcall::MUTEX_LOCK:
 871       label = xbt::string_printf("[(%ld)] Mutex LOCK", issuer->get_pid());
 872       break;
 873
 874     case Simcall::MC_RANDOM:
 875       if (issuer->get_host())
 876         label = xbt::string_printf("[(%ld)%s] MC_RANDOM (%d)", issuer->get_pid(), MC_smx_actor_get_host_name(issuer),
 877                                    value);
 878       else
 879         label = xbt::string_printf("[(%ld)] MC_RANDOM (%d)", issuer->get_pid(), value);
 880       break;
 881
 882     default:
 883       THROW_UNIMPLEMENTED;
 884   }
 885
 886   return xbt::string_printf("label = \"%s\", color = %s, fontcolor = %s", label.c_str(), color, color);
 887 }
 888
 889 const char* Api::simcall_get_name(simgrid::simix::Simcall kind) const
 890 {
 891   return SIMIX_simcall_name(kind);
 892 }
 893
 894 #if HAVE_SMPI
 895 int Api::get_smpi_request_tag(smx_simcall_t const& simcall, simgrid::simix::Simcall type) const
 896 {
 897   simgrid::smpi::Request mpi_request;
 898   void* simcall_data = nullptr;
 899   if (type == Simcall::COMM_ISEND)
 900     simcall_data = simcall_comm_isend__get__data(simcall);
 901   else if (type == Simcall::COMM_IRECV)
 902     simcall_data = simcall_comm_irecv__get__data(simcall);
 903   mc_model_checker->get_remote_simulation().read(&mpi_request, remote(static_cast<smpi::Request*>(simcall_data)));
 904   return mpi_request.tag();
 905 }
 906 #endif
 907
 908 void Api::restore_state(std::shared_ptr<simgrid::mc::Snapshot> system_state) const
 909 {
 910   system_state->restore(&mc_model_checker->get_remote_simulation());
 911 }
 912
 913 void Api::log_state() const
 914 {
 915   session->log_state();
 916 }
 917
 918 bool Api::snapshot_equal(const Snapshot* s1, const Snapshot* s2) const
 919 {
 920   return simgrid::mc::snapshot_equal(s1, s2);
 921 }
 922
 923 simgrid::mc::Snapshot* Api::take_snapshot(int num_state) const
 924 {
 925   auto snapshot = new simgrid::mc::Snapshot(num_state);
 926   return snapshot;
 927 }
 928
 929 void Api::s_close() const
 930 {
 931   session->close();
 932 }
 933
 934 void Api::restore_initial_state() const
 935 {
 936   session->restore_initial_state();
 937 }
 938
 939 void Api::execute(Transition const& transition) const
 940 {
 941   session->execute(transition);
 942 }
 943
 944 #if SIMGRID_HAVE_MC
 945 void Api::automaton_load(const char* file) const
 946 {
 947   MC_automaton_load(file);
 948 }
 949 #endif
 950
 951 std::vector<int> Api::automaton_propositional_symbol_evaluate() const
 952 {
 953   unsigned int cursor = 0;
 954   std::vector<int> values;
 955   xbt_automaton_propositional_symbol_t ps = nullptr;
 956   xbt_dynar_foreach (mc::property_automaton->propositional_symbols, cursor, ps)
 957     values.push_back(xbt_automaton_propositional_symbol_evaluate(ps));
 958   return values;
 959 }
 960
 961 std::vector<xbt_automaton_state_t> Api::get_automaton_state() const
 962 {
 963   std::vector<xbt_automaton_state_t> automaton_stack;
 964   unsigned int cursor = 0;
 965   xbt_automaton_state_t automaton_state;
 966   xbt_dynar_foreach (mc::property_automaton->states, cursor, automaton_state)
 967     if (automaton_state->type == -1)
 968       automaton_stack.push_back(automaton_state);
 969   return automaton_stack;
 970 }
 971
 972 int Api::compare_automaton_exp_label(const xbt_automaton_exp_label* l) const
 973 {
 974   unsigned int cursor                    = 0;
 975   xbt_automaton_propositional_symbol_t p = nullptr;
 976   xbt_dynar_foreach (simgrid::mc::property_automaton->propositional_symbols, cursor, p) {
 977     if (std::strcmp(xbt_automaton_propositional_symbol_get_name(p), l->u.predicat) == 0)
 978       return cursor;
 979   }
 980   return -1;
 981 }
 982
 983 void Api::set_property_automaton(xbt_automaton_state_t const& automaton_state) const
 984 {
 985   mc::property_automaton->current_state = automaton_state;
 986 }
 987
 988 xbt_automaton_exp_label_t Api::get_automaton_transition_label(xbt_dynar_t const& dynar, int index) const
 989 {
 990   const xbt_automaton_transition* transition = xbt_dynar_get_as(dynar, index, xbt_automaton_transition_t);
 991   return transition->label;
 992 }
 993
 994 xbt_automaton_state_t Api::get_automaton_transition_dst(xbt_dynar_t const& dynar, int index) const
 995 {
 996   const xbt_automaton_transition* transition = xbt_dynar_get_as(dynar, index, xbt_automaton_transition_t);
 997   return transition->dst;
 998 }
 999
1000 } // namespace mc
1001 } // namespace simgrid