src/mc/mc_request.cpp

   1 /* Copyright (c) 2008-2020. The SimGrid Team. All rights reserved.          */
   2
   3 /* This program is free software; you can redistribute it and/or modify it
   4  * under the terms of the license (GNU LGPL) which comes with this package. */
   5
   6 #include "src/mc/mc_request.hpp"
   7 #include "src/include/mc/mc.h"
   8 #include "src/kernel/activity/CommImpl.hpp"
   9 #include "src/kernel/activity/MutexImpl.hpp"
  10 #include "src/mc/ModelChecker.hpp"
  11 #include "src/mc/checker/SimcallInspector.hpp"
  12 #include "src/mc/mc_smx.hpp"
  13
  14 using simgrid::mc::remote;
  15
  16 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_request, mc, "Logging specific to MC (request)");
  17
  18 static char *pointer_to_string(void *pointer);
  19 static char *buff_size_to_string(size_t size);
  20
  21 static inline simgrid::kernel::activity::CommImpl* MC_get_comm(smx_simcall_t r)
  22 {
  23   switch (r->call_) {
  24     case SIMCALL_COMM_WAIT:
  25       return static_cast<simgrid::kernel::activity::CommImpl*>(simcall_comm_wait__getraw__comm(r));
  26     case SIMCALL_COMM_TEST:
  27       return static_cast<simgrid::kernel::activity::CommImpl*>(simcall_comm_test__getraw__comm(r));
  28     default:
  29       return nullptr;
  30   }
  31 }
  32
  33 static inline
  34 smx_mailbox_t MC_get_mbox(smx_simcall_t r)
  35 {
  36   switch (r->call_) {
  37     case SIMCALL_COMM_ISEND:
  38       return simcall_comm_isend__get__mbox(r);
  39     case SIMCALL_COMM_IRECV:
  40       return simcall_comm_irecv__get__mbox(r);
  41     default:
  42       return nullptr;
  43   }
  44 }
  45
  46 namespace simgrid {
  47 namespace mc {
  48
  49 // Does half the job
  50 static inline
  51 bool request_depend_asymmetric(smx_simcall_t r1, smx_simcall_t r2)
  52 {
  53   if (r1->call_ == SIMCALL_COMM_ISEND && r2->call_ == SIMCALL_COMM_IRECV)
  54     return false;
  55
  56   if (r1->call_ == SIMCALL_COMM_IRECV && r2->call_ == SIMCALL_COMM_ISEND)
  57     return false;
  58
  59   // Those are internal requests, we do not need indirection because those objects are copies:
  60   const kernel::activity::CommImpl* synchro1 = MC_get_comm(r1);
  61   const kernel::activity::CommImpl* synchro2 = MC_get_comm(r2);
  62
  63   if ((r1->call_ == SIMCALL_COMM_ISEND || r1->call_ == SIMCALL_COMM_IRECV) && r2->call_ == SIMCALL_COMM_WAIT) {
  64     const kernel::activity::MailboxImpl* mbox = MC_get_mbox(r1);
  65
  66     if (mbox != synchro2->mbox_cpy
  67         && simcall_comm_wait__get__timeout(r2) <= 0)
  68       return false;
  69
  70     if ((r1->issuer_ != synchro2->src_actor_.get()) && (r1->issuer_ != synchro2->dst_actor_.get()) &&
  71         simcall_comm_wait__get__timeout(r2) <= 0)
  72       return false;
  73
  74     if ((r1->call_ == SIMCALL_COMM_ISEND) && (synchro2->type_ == kernel::activity::CommImpl::Type::SEND) &&
  75         (synchro2->src_buff_ != simcall_comm_isend__get__src_buff(r1)) && simcall_comm_wait__get__timeout(r2) <= 0)
  76       return false;
  77
  78     if ((r1->call_ == SIMCALL_COMM_IRECV) && (synchro2->type_ == kernel::activity::CommImpl::Type::RECEIVE) &&
  79         (synchro2->dst_buff_ != simcall_comm_irecv__get__dst_buff(r1)) && simcall_comm_wait__get__timeout(r2) <= 0)
  80       return false;
  81   }
  82
  83   /* FIXME: the following rule assumes that the result of the isend/irecv call is not stored in a buffer used in the
  84    * test call. */
  85 #if 0
  86   if((r1->call == SIMCALL_COMM_ISEND || r1->call == SIMCALL_COMM_IRECV)
  87       &&  r2->call == SIMCALL_COMM_TEST)
  88     return false;
  89 #endif
  90
  91   if (r1->call_ == SIMCALL_COMM_WAIT && (r2->call_ == SIMCALL_COMM_WAIT || r2->call_ == SIMCALL_COMM_TEST) &&
  92       (synchro1->src_actor_.get() == nullptr || synchro1->dst_actor_.get() == nullptr))
  93     return false;
  94
  95   if (r1->call_ == SIMCALL_COMM_TEST &&
  96       (simcall_comm_test__get__comm(r1) == nullptr || synchro1->src_buff_ == nullptr || synchro1->dst_buff_ == nullptr))
  97     return false;
  98
  99   if (r1->call_ == SIMCALL_COMM_TEST && r2->call_ == SIMCALL_COMM_WAIT && synchro1->src_buff_ == synchro2->src_buff_ &&
 100       synchro1->dst_buff_ == synchro2->dst_buff_)
 101     return false;
 102
 103   if (r1->call_ == SIMCALL_COMM_WAIT && r2->call_ == SIMCALL_COMM_TEST && synchro1->src_buff_ != nullptr &&
 104       synchro1->dst_buff_ != nullptr && synchro2->src_buff_ != nullptr && synchro2->dst_buff_ != nullptr &&
 105       synchro1->dst_buff_ != synchro2->src_buff_ && synchro1->dst_buff_ != synchro2->dst_buff_ &&
 106       synchro2->dst_buff_ != synchro1->src_buff_)
 107     return false;
 108
 109   return true;
 110 }
 111
 112 // Those are internal_req
 113 bool request_depend(smx_simcall_t req1, smx_simcall_t req2)
 114 {
 115   if (req1->issuer_ == req2->issuer_)
 116     return false;
 117
 118   /* Wait with timeout transitions are not considered by the independence theorem, thus we consider them as dependent with all other transitions */
 119   if ((req1->call_ == SIMCALL_COMM_WAIT && simcall_comm_wait__get__timeout(req1) > 0) ||
 120       (req2->call_ == SIMCALL_COMM_WAIT && simcall_comm_wait__get__timeout(req2) > 0))
 121     return true;
 122
 123   if (req1->call_ != req2->call_)
 124     return request_depend_asymmetric(req1, req2) && request_depend_asymmetric(req2, req1);
 125
 126   // Those are internal requests, we do not need indirection because those objects are copies:
 127   const kernel::activity::CommImpl* synchro1 = MC_get_comm(req1);
 128   const kernel::activity::CommImpl* synchro2 = MC_get_comm(req2);
 129
 130   switch (req1->call_) {
 131     case SIMCALL_COMM_ISEND:
 132       return simcall_comm_isend__get__mbox(req1) == simcall_comm_isend__get__mbox(req2);
 133     case SIMCALL_COMM_IRECV:
 134       return simcall_comm_irecv__get__mbox(req1) == simcall_comm_irecv__get__mbox(req2);
 135     case SIMCALL_COMM_WAIT:
 136       if (synchro1->src_buff_ == synchro2->src_buff_ && synchro1->dst_buff_ == synchro2->dst_buff_)
 137         return false;
 138       if (synchro1->src_buff_ != nullptr && synchro1->dst_buff_ != nullptr && synchro2->src_buff_ != nullptr &&
 139           synchro2->dst_buff_ != nullptr && synchro1->dst_buff_ != synchro2->src_buff_ &&
 140           synchro1->dst_buff_ != synchro2->dst_buff_ && synchro2->dst_buff_ != synchro1->src_buff_)
 141         return false;
 142       return true;
 143     default:
 144       return true;
 145   }
 146 }
 147
 148 } // namespace mc
 149 } // namespace simgrid
 150
 151 static char *pointer_to_string(void *pointer)
 152 {
 153   if (XBT_LOG_ISENABLED(mc_request, xbt_log_priority_verbose))
 154     return bprintf("%p", pointer);
 155
 156   return xbt_strdup("(verbose only)");
 157 }
 158
 159 static char *buff_size_to_string(size_t buff_size)
 160 {
 161   if (XBT_LOG_ISENABLED(mc_request, xbt_log_priority_verbose))
 162     return bprintf("%zu", buff_size);
 163
 164   return xbt_strdup("(verbose only)");
 165 }
 166
 167
 168 std::string simgrid::mc::request_to_string(smx_simcall_t req, int value, simgrid::mc::RequestType request_type)
 169 {
 170   xbt_assert(mc_model_checker != nullptr, "Must be called from MCer");
 171
 172   if (req->inspector_ != nullptr)
 173     return req->inspector_->to_string();
 174
 175   bool use_remote_comm = true;
 176   switch(request_type) {
 177   case simgrid::mc::RequestType::simix:
 178     use_remote_comm = true;
 179     break;
 180   case simgrid::mc::RequestType::executed:
 181   case simgrid::mc::RequestType::internal:
 182     use_remote_comm = false;
 183     break;
 184   default:
 185     THROW_IMPOSSIBLE;
 186   }
 187
 188   const char* type = nullptr;
 189   char *args = nullptr;
 190
 191   smx_actor_t issuer = MC_smx_simcall_get_issuer(req);
 192
 193   switch (req->call_) {
 194     case SIMCALL_COMM_ISEND: {
 195       type     = "iSend";
 196       char* p  = pointer_to_string(simcall_comm_isend__get__src_buff(req));
 197       char* bs = buff_size_to_string(simcall_comm_isend__get__src_buff_size(req));
 198       if (issuer->get_host())
 199         args = bprintf("src=(%ld)%s (%s), buff=%s, size=%s", issuer->get_pid(), MC_smx_actor_get_host_name(issuer),
 200                        MC_smx_actor_get_name(issuer), p, bs);
 201       else
 202         args = bprintf("src=(%ld)%s, buff=%s, size=%s", issuer->get_pid(), MC_smx_actor_get_name(issuer), p, bs);
 203       xbt_free(bs);
 204       xbt_free(p);
 205       break;
 206     }
 207
 208     case SIMCALL_COMM_IRECV: {
 209       size_t* remote_size = simcall_comm_irecv__get__dst_buff_size(req);
 210       size_t size         = 0;
 211       if (remote_size)
 212         mc_model_checker->process().read_bytes(&size, sizeof(size), remote(remote_size));
 213
 214       type     = "iRecv";
 215       char* p  = pointer_to_string(simcall_comm_irecv__get__dst_buff(req));
 216       char* bs = buff_size_to_string(size);
 217       if (issuer->get_host())
 218         args = bprintf("dst=(%ld)%s (%s), buff=%s, size=%s", issuer->get_pid(), MC_smx_actor_get_host_name(issuer),
 219                        MC_smx_actor_get_name(issuer), p, bs);
 220       else
 221         args = bprintf("dst=(%ld)%s, buff=%s, size=%s", issuer->get_pid(), MC_smx_actor_get_name(issuer), p, bs);
 222       xbt_free(bs);
 223       xbt_free(p);
 224       break;
 225     }
 226
 227     case SIMCALL_COMM_WAIT: {
 228       simgrid::kernel::activity::CommImpl* remote_act =
 229           static_cast<simgrid::kernel::activity::CommImpl*>(simcall_comm_wait__getraw__comm(req));
 230       char* p;
 231       if (value == -1) {
 232         type = "WaitTimeout";
 233         p    = pointer_to_string(remote_act);
 234         args = bprintf("comm=%s", p);
 235       } else {
 236         type = "Wait";
 237         p    = pointer_to_string(remote_act);
 238
 239         simgrid::mc::Remote<simgrid::kernel::activity::CommImpl> temp_synchro;
 240         const simgrid::kernel::activity::CommImpl* act;
 241         if (use_remote_comm) {
 242           mc_model_checker->process().read(temp_synchro,
 243                                            remote(static_cast<simgrid::kernel::activity::CommImpl*>(remote_act)));
 244           act = temp_synchro.get_buffer();
 245         } else
 246           act = remote_act;
 247
 248         smx_actor_t src_proc = mc_model_checker->process().resolve_actor(simgrid::mc::remote(act->src_actor_.get()));
 249         smx_actor_t dst_proc = mc_model_checker->process().resolve_actor(simgrid::mc::remote(act->dst_actor_.get()));
 250         args                 = bprintf("comm=%s [(%ld)%s (%s)-> (%ld)%s (%s)]", p, src_proc ? src_proc->get_pid() : 0,
 251                        src_proc ? MC_smx_actor_get_host_name(src_proc) : "",
 252                        src_proc ? MC_smx_actor_get_name(src_proc) : "", dst_proc ? dst_proc->get_pid() : 0,
 253                        dst_proc ? MC_smx_actor_get_host_name(dst_proc) : "",
 254                        dst_proc ? MC_smx_actor_get_name(dst_proc) : "");
 255       }
 256       xbt_free(p);
 257       break;
 258     }
 259
 260     case SIMCALL_COMM_TEST: {
 261       simgrid::kernel::activity::CommImpl* remote_act =
 262           static_cast<simgrid::kernel::activity::CommImpl*>(simcall_comm_test__getraw__comm(req));
 263       simgrid::mc::Remote<simgrid::kernel::activity::CommImpl> temp_synchro;
 264       const simgrid::kernel::activity::CommImpl* act;
 265       if (use_remote_comm) {
 266         mc_model_checker->process().read(temp_synchro,
 267                                          remote(static_cast<simgrid::kernel::activity::CommImpl*>(remote_act)));
 268         act = temp_synchro.get_buffer();
 269       } else
 270         act = remote_act;
 271
 272       char* p;
 273       if (act->src_actor_.get() == nullptr || act->dst_actor_.get() == nullptr) {
 274         type = "Test FALSE";
 275         p    = pointer_to_string(remote_act);
 276         args = bprintf("comm=%s", p);
 277       } else {
 278         type = "Test TRUE";
 279         p    = pointer_to_string(remote_act);
 280
 281         smx_actor_t src_proc = mc_model_checker->process().resolve_actor(simgrid::mc::remote(act->src_actor_.get()));
 282         smx_actor_t dst_proc = mc_model_checker->process().resolve_actor(simgrid::mc::remote(act->dst_actor_.get()));
 283         args                 = bprintf("comm=%s [(%ld)%s (%s) -> (%ld)%s (%s)]", p, src_proc->get_pid(),
 284                        MC_smx_actor_get_name(src_proc), MC_smx_actor_get_host_name(src_proc), dst_proc->get_pid(),
 285                        MC_smx_actor_get_name(dst_proc), MC_smx_actor_get_host_name(dst_proc));
 286       }
 287       xbt_free(p);
 288       break;
 289     }
 290
 291     case SIMCALL_COMM_WAITANY: {
 292       type         = "WaitAny";
 293       size_t count = simcall_comm_waitany__get__count(req);
 294       if (count > 0) {
 295         simgrid::kernel::activity::CommImpl* remote_sync;
 296         remote_sync = mc_model_checker->process().read(remote(simcall_comm_waitany__get__comms(req) + value));
 297         char* p     = pointer_to_string(remote_sync);
 298         args        = bprintf("comm=%s (%d of %zu)", p, value + 1, count);
 299         xbt_free(p);
 300       } else
 301         args = bprintf("comm at idx %d", value);
 302       break;
 303     }
 304
 305     case SIMCALL_COMM_TESTANY:
 306       if (value == -1) {
 307         type = "TestAny FALSE";
 308         args = xbt_strdup("-");
 309       } else {
 310         type = "TestAny";
 311         args = bprintf("(%d of %zu)", value + 1, simcall_comm_testany__get__count(req));
 312       }
 313       break;
 314
 315     case SIMCALL_MUTEX_TRYLOCK:
 316     case SIMCALL_MUTEX_LOCK: {
 317       if (req->call_ == SIMCALL_MUTEX_LOCK)
 318         type = "Mutex LOCK";
 319       else
 320         type = "Mutex TRYLOCK";
 321
 322       simgrid::mc::Remote<simgrid::kernel::activity::MutexImpl> mutex;
 323       mc_model_checker->process().read_bytes(mutex.get_buffer(), sizeof(mutex),
 324                                              remote(req->call_ == SIMCALL_MUTEX_LOCK
 325                                                         ? simcall_mutex_lock__get__mutex(req)
 326                                                         : simcall_mutex_trylock__get__mutex(req)));
 327       args = bprintf("locked = %d, owner = %d, sleeping = n/a", mutex.get_buffer()->is_locked(),
 328                      mutex.get_buffer()->get_owner() != nullptr
 329                          ? (int)mc_model_checker->process()
 330                                .resolve_actor(simgrid::mc::remote(mutex.get_buffer()->get_owner()))
 331                                ->get_pid()
 332                          : -1);
 333       break;
 334     }
 335
 336     case SIMCALL_MC_RANDOM:
 337       type = "MC_RANDOM";
 338       args = bprintf("%d", value);
 339       break;
 340
 341     default:
 342       type = SIMIX_simcall_name(req->call_);
 343       args = bprintf("??");
 344       break;
 345   }
 346
 347   std::string str;
 348   if (args != nullptr)
 349     str = simgrid::xbt::string_printf("[(%ld)%s (%s)] %s(%s)", issuer->get_pid(), MC_smx_actor_get_host_name(issuer),
 350                                       MC_smx_actor_get_name(issuer), type, args);
 351   else
 352     str = simgrid::xbt::string_printf("[(%ld)%s (%s)] %s ", issuer->get_pid(), MC_smx_actor_get_host_name(issuer),
 353                                       MC_smx_actor_get_name(issuer), type);
 354   xbt_free(args);
 355   return str;
 356 }
 357
 358 namespace simgrid {
 359 namespace mc {
 360
 361 bool request_is_enabled_by_idx(smx_simcall_t req, unsigned int idx)
 362 {
 363   kernel::activity::CommImpl* remote_act = nullptr;
 364   switch (req->call_) {
 365     case SIMCALL_COMM_WAIT:
 366       /* FIXME: check also that src and dst processes are not suspended */
 367       remote_act = simcall_comm_wait__getraw__comm(req);
 368       break;
 369
 370     case SIMCALL_COMM_WAITANY:
 371       remote_act = mc_model_checker->process().read(remote(simcall_comm_testany__get__comms(req) + idx));
 372       break;
 373
 374     case SIMCALL_COMM_TESTANY:
 375       remote_act = mc_model_checker->process().read(remote(simcall_comm_testany__get__comms(req) + idx));
 376       break;
 377
 378     default:
 379       return true;
 380   }
 381
 382   Remote<kernel::activity::CommImpl> temp_comm;
 383   mc_model_checker->process().read(temp_comm, remote(remote_act));
 384   const kernel::activity::CommImpl* comm = temp_comm.get_buffer();
 385   return comm->src_actor_.get() && comm->dst_actor_.get();
 386 }
 387
 388 static const char* colors[] = {
 389     "blue",       "red",    "green3",      "goldenrod", "brown",     "purple", "magenta",
 390     "turquoise4", "gray25", "forestgreen", "hotpink",   "lightblue", "tan",
 391 };
 392
 393 static inline const char* get_color(int id)
 394 {
 395   return colors[id % (sizeof(colors) / sizeof(colors[0])) ];
 396 }
 397
 398 std::string request_get_dot_output(smx_simcall_t req, int value)
 399 {
 400   const smx_actor_t issuer = MC_smx_simcall_get_issuer(req);
 401   const char* color        = get_color(issuer->get_pid() - 1);
 402
 403   if (req->inspector_ != nullptr)
 404     return simgrid::xbt::string_printf("label = \"%s\", color = %s, fontcolor = %s",
 405                                        req->inspector_->dot_label().c_str(), color, color);
 406
 407   std::string label;
 408
 409   switch (req->call_) {
 410     case SIMCALL_COMM_ISEND:
 411       if (issuer->get_host())
 412         label = xbt::string_printf("[(%ld)%s] iSend", issuer->get_pid(), MC_smx_actor_get_host_name(issuer));
 413       else
 414         label = bprintf("[(%ld)] iSend", issuer->get_pid());
 415       break;
 416
 417     case SIMCALL_COMM_IRECV:
 418       if (issuer->get_host())
 419         label = xbt::string_printf("[(%ld)%s] iRecv", issuer->get_pid(), MC_smx_actor_get_host_name(issuer));
 420       else
 421         label = xbt::string_printf("[(%ld)] iRecv", issuer->get_pid());
 422       break;
 423
 424     case SIMCALL_COMM_WAIT:
 425       if (value == -1) {
 426         if (issuer->get_host())
 427           label = xbt::string_printf("[(%ld)%s] WaitTimeout", issuer->get_pid(), MC_smx_actor_get_host_name(issuer));
 428         else
 429           label = xbt::string_printf("[(%ld)] WaitTimeout", issuer->get_pid());
 430       } else {
 431         kernel::activity::ActivityImpl* remote_act = simcall_comm_wait__getraw__comm(req);
 432         Remote<kernel::activity::CommImpl> temp_comm;
 433         mc_model_checker->process().read(temp_comm, remote(static_cast<kernel::activity::CommImpl*>(remote_act)));
 434         const kernel::activity::CommImpl* comm = temp_comm.get_buffer();
 435
 436         const kernel::actor::ActorImpl* src_proc =
 437             mc_model_checker->process().resolve_actor(mc::remote(comm->src_actor_.get()));
 438         const kernel::actor::ActorImpl* dst_proc =
 439             mc_model_checker->process().resolve_actor(mc::remote(comm->dst_actor_.get()));
 440         if (issuer->get_host())
 441           label =
 442               xbt::string_printf("[(%ld)%s] Wait [(%ld)->(%ld)]", issuer->get_pid(), MC_smx_actor_get_host_name(issuer),
 443                                  src_proc ? src_proc->get_pid() : 0, dst_proc ? dst_proc->get_pid() : 0);
 444         else
 445           label = xbt::string_printf("[(%ld)] Wait [(%ld)->(%ld)]", issuer->get_pid(),
 446                                      src_proc ? src_proc->get_pid() : 0, dst_proc ? dst_proc->get_pid() : 0);
 447       }
 448       break;
 449
 450     case SIMCALL_COMM_TEST: {
 451       kernel::activity::ActivityImpl* remote_act = simcall_comm_test__getraw__comm(req);
 452       Remote<simgrid::kernel::activity::CommImpl> temp_comm;
 453       mc_model_checker->process().read(temp_comm, remote(static_cast<kernel::activity::CommImpl*>(remote_act)));
 454       const kernel::activity::CommImpl* comm = temp_comm.get_buffer();
 455       if (comm->src_actor_.get() == nullptr || comm->dst_actor_.get() == nullptr) {
 456         if (issuer->get_host())
 457           label = xbt::string_printf("[(%ld)%s] Test FALSE", issuer->get_pid(), MC_smx_actor_get_host_name(issuer));
 458         else
 459           label = bprintf("[(%ld)] Test FALSE", issuer->get_pid());
 460       } else {
 461         if (issuer->get_host())
 462           label = xbt::string_printf("[(%ld)%s] Test TRUE", issuer->get_pid(), MC_smx_actor_get_host_name(issuer));
 463         else
 464           label = xbt::string_printf("[(%ld)] Test TRUE", issuer->get_pid());
 465       }
 466       break;
 467     }
 468
 469     case SIMCALL_COMM_WAITANY: {
 470       size_t comms_size = simcall_comm_waitany__get__count(req);
 471       if (issuer->get_host())
 472         label = xbt::string_printf("[(%ld)%s] WaitAny [%d of %zu]", issuer->get_pid(),
 473                                    MC_smx_actor_get_host_name(issuer), value + 1, comms_size);
 474       else
 475         label = xbt::string_printf("[(%ld)] WaitAny [%d of %zu]", issuer->get_pid(), value + 1, comms_size);
 476       break;
 477     }
 478
 479     case SIMCALL_COMM_TESTANY:
 480       if (value == -1) {
 481         if (issuer->get_host())
 482           label = xbt::string_printf("[(%ld)%s] TestAny FALSE", issuer->get_pid(), MC_smx_actor_get_host_name(issuer));
 483         else
 484           label = xbt::string_printf("[(%ld)] TestAny FALSE", issuer->get_pid());
 485       } else {
 486         if (issuer->get_host())
 487           label =
 488               xbt::string_printf("[(%ld)%s] TestAny TRUE [%d of %lu]", issuer->get_pid(),
 489                                  MC_smx_actor_get_host_name(issuer), value + 1, simcall_comm_testany__get__count(req));
 490         else
 491           label = xbt::string_printf("[(%ld)] TestAny TRUE [%d of %lu]", issuer->get_pid(), value + 1,
 492                                      simcall_comm_testany__get__count(req));
 493       }
 494       break;
 495
 496     case SIMCALL_MUTEX_TRYLOCK:
 497       label = xbt::string_printf("[(%ld)] Mutex TRYLOCK", issuer->get_pid());
 498       break;
 499
 500     case SIMCALL_MUTEX_LOCK:
 501       label = xbt::string_printf("[(%ld)] Mutex LOCK", issuer->get_pid());
 502       break;
 503
 504     case SIMCALL_MC_RANDOM:
 505       if (issuer->get_host())
 506         label = xbt::string_printf("[(%ld)%s] MC_RANDOM (%d)", issuer->get_pid(), MC_smx_actor_get_host_name(issuer),
 507                                    value);
 508       else
 509         label = xbt::string_printf("[(%ld)] MC_RANDOM (%d)", issuer->get_pid(), value);
 510       break;
 511
 512     default:
 513       THROW_UNIMPLEMENTED;
 514   }
 515
 516   return xbt::string_printf("label = \"%s\", color = %s, fontcolor = %s", label.c_str(), color, color);
 517 }
 518
 519 } // namespace mc
 520 } // namespace simgrid