src/mc/mc_api.cpp

   1 #include "mc_api.hpp"
   2
   3 #include "src/kernel/activity/MailboxImpl.hpp"
   4 #include "src/mc/Session.hpp"
   5 #include "src/mc/mc_comm_pattern.hpp"
   6 #include "src/mc/mc_private.hpp"
   7 #include "src/mc/mc_record.hpp"
   8 #include "src/mc/mc_smx.hpp"
   9 #include "src/mc/remote/RemoteSimulation.hpp"
  10 #include "src/mc/mc_pattern.hpp"
  11
  12 #include <xbt/asserts.h>
  13 #include <xbt/log.h>
  14
  15 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_api, mc, "Logging specific to MC Fasade APIs ");
  16
  17 namespace simgrid {
  18 namespace mc {
  19
  20 /* Search an enabled transition for the given process.
  21  *
  22  * This can be seen as an iterator returning the next transition of the process.
  23  *
  24  * We only consider the processes that are both
  25  *  - marked "to be interleaved" in their ActorState (controlled by the checker algorithm).
  26  *  - which simcall can currently be executed (like a comm where the other partner is already known)
  27  * Once we returned the last enabled transition of a process, it is marked done.
  28  *
  29  * Things can get muddled with the WAITANY and TESTANY simcalls, that are rewritten on the fly to a bunch of WAIT
  30  * (resp TEST) transitions using the transition.argument field to remember what was the last returned sub-transition.
  31  */
  32 static inline smx_simcall_t MC_state_choose_request_for_process(simgrid::mc::State* state, smx_actor_t actor)
  33 {
  34   /* reset the outgoing transition */
  35   simgrid::mc::ActorState* procstate = &state->actor_states_[actor->get_pid()];
  36   state->transition_.pid_            = -1;
  37   state->transition_.argument_       = -1;
  38   state->executed_req_.call_         = SIMCALL_NONE;
  39
  40   if (not simgrid::mc::actor_is_enabled(actor))
  41     return nullptr; // Not executable in the application
  42
  43   smx_simcall_t req = nullptr;
  44   switch (actor->simcall_.call_) {
  45     case SIMCALL_COMM_WAITANY:
  46       state->transition_.argument_ = -1;
  47       while (procstate->times_considered < simcall_comm_waitany__get__count(&actor->simcall_)) {
  48         if (simgrid::mc::request_is_enabled_by_idx(&actor->simcall_, procstate->times_considered)) {
  49           state->transition_.argument_ = procstate->times_considered;
  50           ++procstate->times_considered;
  51           break;
  52         }
  53         ++procstate->times_considered;
  54       }
  55
  56       if (procstate->times_considered >= simcall_comm_waitany__get__count(&actor->simcall_))
  57         procstate->set_done();
  58       if (state->transition_.argument_ != -1)
  59         req = &actor->simcall_;
  60       break;
  61
  62     case SIMCALL_COMM_TESTANY: {
  63       unsigned start_count         = procstate->times_considered;
  64       state->transition_.argument_ = -1;
  65       while (procstate->times_considered < simcall_comm_testany__get__count(&actor->simcall_)) {
  66         if (simgrid::mc::request_is_enabled_by_idx(&actor->simcall_, procstate->times_considered)) {
  67           state->transition_.argument_ = procstate->times_considered;
  68           ++procstate->times_considered;
  69           break;
  70         }
  71         ++procstate->times_considered;
  72       }
  73
  74       if (procstate->times_considered >= simcall_comm_testany__get__count(&actor->simcall_))
  75         procstate->set_done();
  76
  77       if (state->transition_.argument_ != -1 || start_count == 0)
  78         req = &actor->simcall_;
  79
  80       break;
  81     }
  82
  83     case SIMCALL_COMM_WAIT: {
  84       simgrid::mc::RemotePtr<simgrid::kernel::activity::CommImpl> remote_act =
  85           remote(simcall_comm_wait__getraw__comm(&actor->simcall_));
  86       simgrid::mc::Remote<simgrid::kernel::activity::CommImpl> temp_act;
  87       mc_model_checker->get_remote_simulation().read(temp_act, remote_act);
  88       const simgrid::kernel::activity::CommImpl* act = temp_act.get_buffer();
  89       if (act->src_actor_.get() && act->dst_actor_.get())
  90         state->transition_.argument_ = 0; // OK
  91       else if (act->src_actor_.get() == nullptr && act->type_ == simgrid::kernel::activity::CommImpl::Type::READY &&
  92                act->detached())
  93         state->transition_.argument_ = 0; // OK
  94       else
  95         state->transition_.argument_ = -1; // timeout
  96       procstate->set_done();
  97       req = &actor->simcall_;
  98       break;
  99     }
 100
 101     case SIMCALL_MC_RANDOM: {
 102       int min_value                = simcall_mc_random__get__min(&actor->simcall_);
 103       state->transition_.argument_ = procstate->times_considered + min_value;
 104       procstate->times_considered++;
 105       if (state->transition_.argument_ == simcall_mc_random__get__max(&actor->simcall_))
 106         procstate->set_done();
 107       req = &actor->simcall_;
 108       break;
 109     }
 110
 111     default:
 112       procstate->set_done();
 113       state->transition_.argument_ = 0;
 114       req                          = &actor->simcall_;
 115       break;
 116   }
 117   if (not req)
 118     return nullptr;
 119
 120   state->transition_.pid_ = actor->get_pid();
 121   state->executed_req_    = *req;
 122   // Fetch the data of the request and translate it:
 123   state->internal_req_ = *req;
 124
 125   /* The waitany and testany request are transformed into a wait or test request over the corresponding communication
 126    * action so it can be treated later by the dependence function. */
 127   switch (req->call_) {
 128     case SIMCALL_COMM_WAITANY: {
 129       state->internal_req_.call_ = SIMCALL_COMM_WAIT;
 130       simgrid::kernel::activity::CommImpl* remote_comm;
 131       remote_comm = mc_model_checker->get_remote_simulation().read(
 132           remote(simcall_comm_waitany__get__comms(req) + state->transition_.argument_));
 133       mc_model_checker->get_remote_simulation().read(state->internal_comm_, remote(remote_comm));
 134       simcall_comm_wait__set__comm(&state->internal_req_, state->internal_comm_.get_buffer());
 135       simcall_comm_wait__set__timeout(&state->internal_req_, 0);
 136       break;
 137     }
 138
 139     case SIMCALL_COMM_TESTANY:
 140       state->internal_req_.call_ = SIMCALL_COMM_TEST;
 141
 142       if (state->transition_.argument_ > 0) {
 143         simgrid::kernel::activity::CommImpl* remote_comm = mc_model_checker->get_remote_simulation().read(
 144             remote(simcall_comm_testany__get__comms(req) + state->transition_.argument_));
 145         mc_model_checker->get_remote_simulation().read(state->internal_comm_, remote(remote_comm));
 146       }
 147
 148       simcall_comm_test__set__comm(&state->internal_req_, state->internal_comm_.get_buffer());
 149       simcall_comm_test__set__result(&state->internal_req_, state->transition_.argument_);
 150       break;
 151
 152     case SIMCALL_COMM_WAIT:
 153       mc_model_checker->get_remote_simulation().read_bytes(&state->internal_comm_, sizeof(state->internal_comm_),
 154                                                            remote(simcall_comm_wait__getraw__comm(req)));
 155       simcall_comm_wait__set__comm(&state->executed_req_, state->internal_comm_.get_buffer());
 156       simcall_comm_wait__set__comm(&state->internal_req_, state->internal_comm_.get_buffer());
 157       break;
 158
 159     case SIMCALL_COMM_TEST:
 160       mc_model_checker->get_remote_simulation().read_bytes(&state->internal_comm_, sizeof(state->internal_comm_),
 161                                                            remote(simcall_comm_test__getraw__comm(req)));
 162       simcall_comm_test__set__comm(&state->executed_req_, state->internal_comm_.get_buffer());
 163       simcall_comm_test__set__comm(&state->internal_req_, state->internal_comm_.get_buffer());
 164       break;
 165
 166     default:
 167       /* No translation needed */
 168       break;
 169   }
 170
 171   return req;
 172 }
 173
 174 void mc_api::initialize(char** argv)
 175 {
 176   simgrid::mc::session = new simgrid::mc::Session([argv] {
 177     int i = 1;
 178     while (argv[i] != nullptr && argv[i][0] == '-')
 179       i++;
 180     xbt_assert(argv[i] != nullptr,
 181                "Unable to find a binary to exec on the command line. Did you only pass config flags?");
 182     execvp(argv[i], argv + i);
 183     xbt_die("The model-checked process failed to exec(): %s", strerror(errno));
 184   });
 185 }
 186
 187 std::vector<simgrid::mc::ActorInformation>& mc_api::get_actors() const
 188 {
 189   return mc_model_checker->get_remote_simulation().actors();
 190 }
 191
 192 bool mc_api::actor_is_enabled(aid_t pid) const
 193 {
 194   return session->actor_is_enabled(pid);
 195 }
 196
 197 unsigned long mc_api::get_maxpid() const
 198 {
 199   return MC_smx_get_maxpid();
 200 }
 201
 202 void mc_api::copy_incomplete_comm_pattern(const simgrid::mc::State* state) const
 203 {
 204   MC_state_copy_incomplete_communications_pattern((simgrid::mc::State*)state);
 205 }
 206
 207 void mc_api::copy_index_comm_pattern(const simgrid::mc::State* state) const
 208 {
 209   MC_state_copy_index_communications_pattern((simgrid::mc::State*)state);
 210 }
 211
 212 std::string mc_api::get_pattern_comm_rdv(void* addr) const
 213 {
 214   Remote<kernel::activity::CommImpl> temp_synchro;
 215   mc_model_checker->get_remote_simulation().read(temp_synchro, remote((simgrid::kernel::activity::CommImpl*)addr));
 216   const kernel::activity::CommImpl* synchro = temp_synchro.get_buffer();
 217
 218   char* remote_name = mc_model_checker->get_remote_simulation().read<char*>(RemotePtr<char*>(
 219       (uint64_t)(synchro->get_mailbox() ? &synchro->get_mailbox()->get_name() : &synchro->mbox_cpy->get_name())));
 220   auto rdv = mc_model_checker->get_remote_simulation().read_string(RemotePtr<char>(remote_name));
 221   return rdv;
 222 }
 223
 224 std::size_t mc_api::get_remote_heap_bytes() const
 225 {
 226   RemoteSimulation& process = mc_model_checker->get_remote_simulation();
 227   auto heap_bytes_used = mmalloc_get_bytes_used_remote(process.get_heap()->heaplimit, process.get_malloc_info());
 228   return heap_bytes_used;
 229 }
 230
 231 void mc_api::s_initialize() const
 232 {
 233   session->initialize();
 234 }
 235
 236 ModelChecker* mc_api::get_model_checker() const
 237 {
 238   return mc_model_checker;
 239 }
 240
 241 void mc_api::mc_inc_visited_states() const
 242 {
 243   mc_model_checker->visited_states++;
 244 }
 245
 246 void mc_api::mc_inc_executed_trans() const
 247 {
 248   mc_model_checker->executed_transitions++;
 249 }
 250
 251 unsigned long mc_api::mc_get_visited_states() const
 252 {
 253   return mc_model_checker->visited_states;
 254 }
 255
 256 unsigned long mc_api::mc_get_executed_trans() const
 257 {
 258   return mc_model_checker->executed_transitions;
 259 }
 260
 261 bool mc_api::mc_check_deadlock() const
 262 {
 263   return mc_model_checker->checkDeadlock();
 264 }
 265
 266 void mc_api::mc_show_deadlock() const
 267 {
 268   MC_show_deadlock();
 269 }
 270
 271 smx_actor_t mc_api::mc_smx_simcall_get_issuer(s_smx_simcall const* req) const
 272 {
 273   return MC_smx_simcall_get_issuer(req);
 274 }
 275
 276 bool mc_api::mc_is_null() const
 277 {
 278   auto is_null = (mc_model_checker == nullptr) ? true : false;
 279   return is_null;
 280 }
 281
 282 Checker* mc_api::mc_get_checker() const
 283 {
 284   return mc_model_checker->getChecker();
 285 }
 286
 287 RemoteSimulation& mc_api::mc_get_remote_simulation() const
 288 {
 289   return mc_model_checker->get_remote_simulation();
 290 }
 291
 292 void mc_api::handle_simcall(Transition const& transition) const
 293 {
 294   mc_model_checker->handle_simcall(transition);
 295 }
 296
 297 void mc_api::mc_wait_for_requests() const
 298 {
 299   mc_model_checker->wait_for_requests();
 300 }
 301
 302 void mc_api::mc_exit(int status) const
 303 {
 304   mc_model_checker->exit(status);
 305 }
 306
 307 std::string const& mc_api::mc_get_host_name(std::string const& hostname) const
 308 {
 309   return mc_model_checker->get_host_name(hostname);
 310 }
 311
 312 void mc_api::mc_dump_record_path() const
 313 {
 314   simgrid::mc::dumpRecordPath();
 315 }
 316
 317 smx_simcall_t mc_api::mc_state_choose_request(simgrid::mc::State* state) const
 318 {
 319   for (auto& actor : mc_model_checker->get_remote_simulation().actors()) {
 320     /* Only consider the actors that were marked as interleaving by the checker algorithm */
 321     if (not state->actor_states_[actor.copy.get_buffer()->get_pid()].is_todo())
 322       continue;
 323
 324     smx_simcall_t res = MC_state_choose_request_for_process(state, actor.copy.get_buffer());
 325     if (res)
 326       return res;
 327   }
 328   return nullptr;
 329 }
 330
 331 bool mc_api::request_depend(smx_simcall_t req1, smx_simcall_t req2) const
 332 {
 333   return simgrid::mc::request_depend(req1, req2);
 334 }
 335
 336 std::string mc_api::request_to_string(smx_simcall_t req, int value, RequestType request_type) const
 337 {
 338   return simgrid::mc::request_to_string(req, value, request_type).c_str();
 339 }
 340
 341 std::string mc_api::request_get_dot_output(smx_simcall_t req, int value) const
 342 {
 343   return simgrid::mc::request_get_dot_output(req, value);
 344 }
 345
 346 const char* mc_api::simix_simcall_name(e_smx_simcall_t kind) const
 347 {
 348   return SIMIX_simcall_name(kind);
 349 }
 350
 351 bool mc_api::snapshot_equal(const Snapshot* s1, const Snapshot* s2) const
 352 {
 353   return simgrid::mc::snapshot_equal(s1, s2);
 354 }
 355
 356 simgrid::mc::Snapshot* mc_api::take_snapshot(int num_state) const
 357 {
 358   auto snapshot = new simgrid::mc::Snapshot(num_state);
 359   return snapshot;
 360 }
 361
 362 void mc_api::s_close() const
 363 {
 364   session->close();
 365 }
 366
 367 void mc_api::s_restore_initial_state() const
 368 {
 369   session->restore_initial_state();
 370 }
 371
 372 void mc_api::execute(Transition const& transition)
 373 {
 374   session->execute(transition);
 375 }
 376
 377 void mc_api::s_log_state() const
 378 {
 379   session->log_state();
 380 }
 381
 382 } // namespace mc
 383 } // namespace simgrid