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