src/mc/mc_request.cpp

   1 /* Copyright (c) 2008-2015. The SimGrid Team.
   2  * All rights reserved.                                                     */
   3
   4 /* This program is free software; you can redistribute it and/or modify it
   5  * under the terms of the license (GNU LGPL) which comes with this package. */
   6
   7 #include <cassert>
   8
   9 #include "src/mc/ModelChecker.hpp"
  10 #include "src/mc/mc_request.h"
  11 #include "src/mc/mc_smx.h"
  12 #include "src/mc/mc_xbt.hpp"
  13
  14 using simgrid::mc::remote;
  15
  16 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_request, mc,
  17                                 "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
  23 simgrid::kernel::activity::Comm* MC_get_comm(smx_simcall_t r)
  24 {
  25   switch (r->call ) {
  26   case SIMCALL_COMM_WAIT:
  27     return static_cast<simgrid::kernel::activity::Comm*>(simcall_comm_wait__get__comm(r));
  28   case SIMCALL_COMM_TEST:
  29     return static_cast<simgrid::kernel::activity::Comm*>(simcall_comm_test__get__comm(r));
  30   default:
  31     return nullptr;
  32   }
  33 }
  34
  35 static inline
  36 smx_mailbox_t MC_get_mbox(smx_simcall_t r)
  37 {
  38   switch(r->call) {
  39   case SIMCALL_COMM_ISEND:
  40     return simcall_comm_isend__get__mbox(r);
  41   case SIMCALL_COMM_IRECV:
  42     return simcall_comm_irecv__get__mbox(r);
  43   default:
  44     return nullptr;
  45   }
  46 }
  47
  48 namespace simgrid {
  49 namespace mc {
  50
  51 // Does half the job
  52 static inline
  53 bool request_depend_asymmetric(smx_simcall_t r1, smx_simcall_t r2)
  54 {
  55   if (r1->call == SIMCALL_COMM_ISEND && r2->call == SIMCALL_COMM_IRECV)
  56     return false;
  57
  58   if (r1->call == SIMCALL_COMM_IRECV && r2->call == SIMCALL_COMM_ISEND)
  59     return false;
  60
  61   // Those are internal requests, we do not need indirection
  62   // because those objects are copies:
  63   simgrid::kernel::activity::Comm* synchro1 = MC_get_comm(r1);
  64   simgrid::kernel::activity::Comm* synchro2 = MC_get_comm(r2);
  65
  66   if ((r1->call == SIMCALL_COMM_ISEND || r1->call == SIMCALL_COMM_IRECV)
  67       && r2->call == SIMCALL_COMM_WAIT) {
  68
  69     smx_mailbox_t mbox = MC_get_mbox(r1);
  70
  71     if (mbox != synchro2->mbox_cpy
  72         && simcall_comm_wait__get__timeout(r2) <= 0)
  73       return false;
  74
  75     if ((r1->issuer != synchro2->src_proc)
  76         && (r1->issuer != synchro2->dst_proc)
  77         && simcall_comm_wait__get__timeout(r2) <= 0)
  78       return false;
  79
  80     if ((r1->call == SIMCALL_COMM_ISEND)
  81         && (synchro2->type == SIMIX_COMM_SEND)
  82         && (synchro2->src_buff !=
  83             simcall_comm_isend__get__src_buff(r1))
  84         && simcall_comm_wait__get__timeout(r2) <= 0)
  85       return false;
  86
  87     if ((r1->call == SIMCALL_COMM_IRECV)
  88         && (synchro2->type == SIMIX_COMM_RECEIVE)
  89         && (synchro2->dst_buff != simcall_comm_irecv__get__dst_buff(r1))
  90         && simcall_comm_wait__get__timeout(r2) <= 0)
  91       return false;
  92   }
  93
  94   /* FIXME: the following rule assumes that the result of the
  95    * isend/irecv call is not stored in a buffer used in the
  96    * test call. */
  97 #if 0
  98   if((r1->call == SIMCALL_COMM_ISEND || r1->call == SIMCALL_COMM_IRECV)
  99      &&  r2->call == SIMCALL_COMM_TEST)
 100      return FALSE;
 101 #endif
 102
 103   if (r1->call == SIMCALL_COMM_WAIT
 104       && (r2->call == SIMCALL_COMM_WAIT || r2->call == SIMCALL_COMM_TEST)
 105       && (synchro1->src_proc == nullptr || synchro1->dst_proc == nullptr))
 106     return false;
 107
 108   if (r1->call == SIMCALL_COMM_TEST &&
 109       (simcall_comm_test__get__comm(r1) == nullptr
 110        || synchro1->src_buff == nullptr
 111        || synchro1->dst_buff == nullptr))
 112     return false;
 113
 114   if (r1->call == SIMCALL_COMM_TEST && r2->call == SIMCALL_COMM_WAIT
 115       && synchro1->src_buff == synchro2->src_buff
 116       && synchro1->dst_buff == synchro2->dst_buff)
 117     return false;
 118
 119   if (r1->call == SIMCALL_COMM_WAIT && r2->call == SIMCALL_COMM_TEST
 120       && synchro1->src_buff != nullptr
 121       && synchro1->dst_buff != nullptr
 122       && synchro2->src_buff != nullptr
 123       && synchro2->dst_buff != nullptr
 124       && synchro1->dst_buff != synchro2->src_buff
 125       && synchro1->dst_buff != synchro2->dst_buff
 126       && synchro2->dst_buff != synchro1->src_buff)
 127     return false;
 128
 129   return true;
 130 }
 131
 132 // Those are internal_req
 133 bool request_depend(smx_simcall_t r1, smx_simcall_t r2)
 134 {
 135   if (r1->issuer == r2->issuer)
 136     return false;
 137
 138   /* Wait with timeout transitions are not considered by the independence theorem, thus we consider them as dependent with all other transitions */
 139   if ((r1->call == SIMCALL_COMM_WAIT && simcall_comm_wait__get__timeout(r1) > 0)
 140       || (r2->call == SIMCALL_COMM_WAIT
 141           && simcall_comm_wait__get__timeout(r2) > 0))
 142     return TRUE;
 143
 144   if (r1->call != r2->call)
 145     return request_depend_asymmetric(r1, r2)
 146       && request_depend_asymmetric(r2, r1);
 147
 148   // Those are internal requests, we do not need indirection
 149   // because those objects are copies:
 150   simgrid::kernel::activity::Comm* synchro1 = MC_get_comm(r1);
 151   simgrid::kernel::activity::Comm* synchro2 = MC_get_comm(r2);
 152
 153   switch(r1->call) {
 154   case SIMCALL_COMM_ISEND:
 155     return simcall_comm_isend__get__mbox(r1)
 156       == simcall_comm_isend__get__mbox(r2);
 157   case SIMCALL_COMM_IRECV:
 158     return simcall_comm_irecv__get__mbox(r1)
 159       == simcall_comm_irecv__get__mbox(r2);
 160   case SIMCALL_COMM_WAIT:
 161     if (synchro1->src_buff == synchro2->src_buff
 162         && synchro1->dst_buff == synchro2->dst_buff)
 163       return false;
 164     else if (synchro1->src_buff != nullptr
 165         && synchro1->dst_buff != nullptr
 166         && synchro2->src_buff != nullptr
 167         && synchro2->dst_buff != nullptr
 168         && synchro1->dst_buff != synchro2->src_buff
 169         && synchro1->dst_buff != synchro2->dst_buff
 170         && synchro2->dst_buff != synchro1->src_buff)
 171       return false;
 172     else
 173       return true;
 174   default:
 175     return true;
 176   }
 177 }
 178
 179 }
 180 }
 181
 182 static char *pointer_to_string(void *pointer)
 183 {
 184
 185   if (XBT_LOG_ISENABLED(mc_request, xbt_log_priority_verbose))
 186     return bprintf("%p", pointer);
 187
 188   return xbt_strdup("(verbose only)");
 189 }
 190
 191 static char *buff_size_to_string(size_t buff_size)
 192 {
 193
 194   if (XBT_LOG_ISENABLED(mc_request, xbt_log_priority_verbose))
 195     return bprintf("%zu", buff_size);
 196
 197   return xbt_strdup("(verbose only)");
 198 }
 199
 200
 201 std::string simgrid::mc::request_to_string(smx_simcall_t req, int value, simgrid::mc::RequestType request_type)
 202 {
 203   xbt_assert(mc_model_checker != nullptr);
 204
 205   bool use_remote_comm = true;
 206   switch(request_type) {
 207   case simgrid::mc::RequestType::simix:
 208     use_remote_comm = true;
 209     break;
 210   case simgrid::mc::RequestType::executed:
 211   case simgrid::mc::RequestType::internal:
 212     use_remote_comm = false;
 213     break;
 214   }
 215
 216   const char* type = nullptr;
 217   char *args = nullptr;
 218
 219   smx_actor_t issuer = MC_smx_simcall_get_issuer(req);
 220
 221   switch (req->call) {
 222
 223   case SIMCALL_COMM_ISEND: {
 224     type = "iSend";
 225     char* p = pointer_to_string(simcall_comm_isend__get__src_buff(req));
 226     char* bs = buff_size_to_string(simcall_comm_isend__get__src_buff_size(req));
 227     if (issuer->host)
 228       args = bprintf("src=(%lu)%s (%s), buff=%s, size=%s", issuer->pid, MC_smx_actor_get_host_name(issuer),
 229                      MC_smx_actor_get_name(issuer), p, bs);
 230     else
 231       args = bprintf("src=(%lu)%s, buff=%s, size=%s", issuer->pid, MC_smx_actor_get_name(issuer), p, bs);
 232     xbt_free(bs);
 233     xbt_free(p);
 234     break;
 235   }
 236
 237   case SIMCALL_COMM_IRECV: {
 238     size_t* remote_size = simcall_comm_irecv__get__dst_buff_size(req);
 239
 240     // size_t size = size_pointer ? *size_pointer : 0;
 241     size_t size = 0;
 242     if (remote_size)
 243       mc_model_checker->process().read_bytes(&size, sizeof(size),
 244         remote(remote_size));
 245
 246     type = "iRecv";
 247     char* p = pointer_to_string(simcall_comm_irecv__get__dst_buff(req));
 248     char* bs = buff_size_to_string(size);
 249     if (issuer->host)
 250       args = bprintf("dst=(%lu)%s (%s), buff=%s, size=%s", issuer->pid, MC_smx_actor_get_host_name(issuer),
 251                      MC_smx_actor_get_name(issuer), p, bs);
 252     else
 253       args = bprintf("dst=(%lu)%s, buff=%s, size=%s", issuer->pid, MC_smx_actor_get_name(issuer), p, bs);
 254     xbt_free(bs);
 255     xbt_free(p);
 256     break;
 257   }
 258
 259   case SIMCALL_COMM_WAIT: {
 260     simgrid::kernel::activity::Comm* remote_act =
 261       static_cast<simgrid::kernel::activity::Comm*>(simcall_comm_wait__get__comm(req));
 262     char* p;
 263     if (value == -1) {
 264       type = "WaitTimeout";
 265       p = pointer_to_string(remote_act);
 266       args = bprintf("comm=%s", p);
 267     } else {
 268       type = "Wait";
 269       p = pointer_to_string(remote_act);
 270
 271       simgrid::mc::Remote<simgrid::kernel::activity::Comm> temp_synchro;
 272       simgrid::kernel::activity::Comm* act;
 273       if (use_remote_comm) {
 274         mc_model_checker->process().read(temp_synchro, remote(
 275           static_cast<simgrid::kernel::activity::Comm*>(remote_act)));
 276         act = temp_synchro.getBuffer();
 277       } else
 278         act = remote_act;
 279
 280       smx_actor_t src_proc = mc_model_checker->process().resolveActor(simgrid::mc::remote(act->src_proc));
 281       smx_actor_t dst_proc = mc_model_checker->process().resolveActor(simgrid::mc::remote(act->dst_proc));
 282       args =
 283           bprintf("comm=%s [(%lu)%s (%s)-> (%lu)%s (%s)]", p, src_proc ? src_proc->pid : 0,
 284                   src_proc ? MC_smx_actor_get_host_name(src_proc) : "", src_proc ? MC_smx_actor_get_name(src_proc) : "",
 285                   dst_proc ? dst_proc->pid : 0, dst_proc ? MC_smx_actor_get_host_name(dst_proc) : "",
 286                   dst_proc ? MC_smx_actor_get_name(dst_proc) : "");
 287     }
 288     xbt_free(p);
 289     break;
 290   }
 291
 292   case SIMCALL_COMM_TEST: {
 293     simgrid::kernel::activity::Comm* remote_act = static_cast<simgrid::kernel::activity::Comm*>(
 294       simcall_comm_test__get__comm(req));
 295     simgrid::mc::Remote<simgrid::kernel::activity::Comm> temp_synchro;
 296     simgrid::kernel::activity::Comm* act;
 297     if (use_remote_comm) {
 298       mc_model_checker->process().read(temp_synchro, remote(
 299         static_cast<simgrid::kernel::activity::Comm*>(remote_act)));
 300       act = temp_synchro.getBuffer();
 301     } else
 302       act = remote_act;
 303
 304     char* p;
 305     if (act->src_proc == nullptr || act->dst_proc == nullptr) {
 306       type = "Test FALSE";
 307       p = pointer_to_string(remote_act);
 308       args = bprintf("comm=%s", p);
 309     } else {
 310       type = "Test TRUE";
 311       p = pointer_to_string(remote_act);
 312
 313       smx_actor_t src_proc = mc_model_checker->process().resolveActor(simgrid::mc::remote(act->src_proc));
 314       smx_actor_t dst_proc = mc_model_checker->process().resolveActor(simgrid::mc::remote(act->dst_proc));
 315       args = bprintf("comm=%s [(%lu)%s (%s) -> (%lu)%s (%s)]", p, src_proc->pid, MC_smx_actor_get_name(src_proc),
 316                      MC_smx_actor_get_host_name(src_proc), dst_proc->pid, MC_smx_actor_get_name(dst_proc),
 317                      MC_smx_actor_get_host_name(dst_proc));
 318     }
 319     xbt_free(p);
 320     break;
 321   }
 322
 323   case SIMCALL_COMM_WAITANY: {
 324     type = "WaitAny";
 325     s_xbt_dynar_t comms;
 326     mc_model_checker->process().read_bytes(
 327       &comms, sizeof(comms), remote(simcall_comm_waitany__get__comms(req)));
 328     if (not xbt_dynar_is_empty(&comms)) {
 329       smx_activity_t remote_sync;
 330       read_element(mc_model_checker->process(),
 331         &remote_sync, remote(simcall_comm_waitany__get__comms(req)), value,
 332         sizeof(remote_sync));
 333       char* p = pointer_to_string(remote_sync);
 334       args = bprintf("comm=%s (%d of %lu)",
 335         p, value + 1, xbt_dynar_length(&comms));
 336       xbt_free(p);
 337     } else
 338       args = bprintf("comm at idx %d", value);
 339     break;
 340   }
 341
 342   case SIMCALL_COMM_TESTANY:
 343     if (value == -1) {
 344       type = "TestAny FALSE";
 345       args = xbt_strdup("-");
 346     } else {
 347       type = "TestAny";
 348       args =
 349           bprintf("(%d of %zu)", value + 1,
 350                     simcall_comm_testany__get__count(req));
 351     }
 352     break;
 353
 354   case SIMCALL_MUTEX_TRYLOCK:
 355   case SIMCALL_MUTEX_LOCK: {
 356     if (req->call == SIMCALL_MUTEX_LOCK)
 357       type = "Mutex LOCK";
 358     else
 359       type = "Mutex TRYLOCK";
 360
 361     simgrid::mc::Remote<simgrid::simix::MutexImpl> mutex;
 362     mc_model_checker->process().read_bytes(mutex.getBuffer(), sizeof(mutex),
 363       remote(
 364         req->call == SIMCALL_MUTEX_LOCK
 365         ? simcall_mutex_lock__get__mutex(req)
 366         : simcall_mutex_trylock__get__mutex(req)
 367       ));
 368     s_xbt_swag_t mutex_sleeping;
 369     mc_model_checker->process().read_bytes(&mutex_sleeping, sizeof(mutex_sleeping),
 370       remote(mutex.getBuffer()->sleeping));
 371
 372     args =
 373         bprintf("locked = %d, owner = %d, sleeping = %d", mutex.getBuffer()->locked,
 374                 mutex.getBuffer()->owner != nullptr
 375                     ? (int)mc_model_checker->process().resolveActor(simgrid::mc::remote(mutex.getBuffer()->owner))->pid
 376                     : -1,
 377                 mutex_sleeping.count);
 378     break;
 379   }
 380
 381   case SIMCALL_MC_RANDOM:
 382     type = "MC_RANDOM";
 383     args = bprintf("%d", value);
 384     break;
 385
 386   default:
 387     type = SIMIX_simcall_name(req->call);
 388     args = bprintf("??");
 389     break;
 390   }
 391
 392   std::string str;
 393   if (args != nullptr)
 394     str = simgrid::xbt::string_printf("[(%lu)%s (%s)] %s(%s)", issuer->pid, MC_smx_actor_get_host_name(issuer),
 395                                       MC_smx_actor_get_name(issuer), type, args);
 396   else
 397     str = simgrid::xbt::string_printf("[(%lu)%s (%s)] %s ", issuer->pid, MC_smx_actor_get_host_name(issuer),
 398                                       MC_smx_actor_get_name(issuer), type);
 399   xbt_free(args);
 400   return str;
 401 }
 402
 403 namespace simgrid {
 404 namespace mc {
 405
 406 bool request_is_enabled_by_idx(smx_simcall_t req, unsigned int idx)
 407 {
 408   smx_activity_t remote_act = nullptr;
 409   switch (req->call) {
 410
 411   case SIMCALL_COMM_WAIT:
 412     /* FIXME: check also that src and dst processes are not suspended */
 413     remote_act = simcall_comm_wait__get__comm(req);
 414     break;
 415
 416   case SIMCALL_COMM_WAITANY: {
 417     read_element(
 418       mc_model_checker->process(), &remote_act,
 419       remote(simcall_comm_waitany__get__comms(req)),
 420       idx, sizeof(remote_act));
 421     }
 422     break;
 423
 424   case SIMCALL_COMM_TESTANY:
 425     remote_act = mc_model_checker->process().read(remote(
 426       simcall_comm_testany__get__comms(req) + idx));
 427     break;
 428
 429   default:
 430     return true;
 431   }
 432
 433   simgrid::mc::Remote<simgrid::kernel::activity::Comm> temp_comm;
 434   mc_model_checker->process().read(temp_comm, remote(
 435     static_cast<simgrid::kernel::activity::Comm*>(remote_act)));
 436   simgrid::kernel::activity::Comm* comm = temp_comm.getBuffer();
 437   return comm->src_proc && comm->dst_proc;
 438 }
 439
 440 bool actor_is_enabled(smx_actor_t actor)
 441 {
 442   return simgrid::mc::request_is_enabled(&actor->simcall);
 443 }
 444
 445 static const char* colors[] = {
 446   "blue",
 447   "red",
 448   "green3",
 449   "goldenrod",
 450   "brown",
 451   "purple",
 452   "magenta",
 453   "turquoise4",
 454   "gray25",
 455   "forestgreen",
 456   "hotpink",
 457   "lightblue",
 458   "tan",
 459 };
 460
 461 static inline const char* get_color(int id)
 462 {
 463   return colors[id % (sizeof(colors) / sizeof(colors[0])) ];
 464 }
 465
 466 std::string request_get_dot_output(smx_simcall_t req, int value)
 467 {
 468   std::string label;
 469
 470   const smx_actor_t issuer = MC_smx_simcall_get_issuer(req);
 471
 472   switch (req->call) {
 473   case SIMCALL_COMM_ISEND:
 474     if (issuer->host)
 475       label = simgrid::xbt::string_printf("[(%lu)%s] iSend", issuer->pid, MC_smx_actor_get_host_name(issuer));
 476     else
 477       label = bprintf("[(%lu)] iSend", issuer->pid);
 478     break;
 479
 480   case SIMCALL_COMM_IRECV:
 481     if (issuer->host)
 482       label = simgrid::xbt::string_printf("[(%lu)%s] iRecv", issuer->pid, MC_smx_actor_get_host_name(issuer));
 483     else
 484       label = simgrid::xbt::string_printf("[(%lu)] iRecv", issuer->pid);
 485     break;
 486
 487   case SIMCALL_COMM_WAIT: {
 488     if (value == -1) {
 489       if (issuer->host)
 490         label = simgrid::xbt::string_printf("[(%lu)%s] WaitTimeout", issuer->pid, MC_smx_actor_get_host_name(issuer));
 491       else
 492         label = simgrid::xbt::string_printf("[(%lu)] WaitTimeout", issuer->pid);
 493     } else {
 494       smx_activity_t remote_act = simcall_comm_wait__get__comm(req);
 495       simgrid::mc::Remote<simgrid::kernel::activity::Comm> temp_comm;
 496       mc_model_checker->process().read(temp_comm, remote(
 497         static_cast<simgrid::kernel::activity::Comm*>(remote_act)));
 498       simgrid::kernel::activity::Comm* comm = temp_comm.getBuffer();
 499
 500       smx_actor_t src_proc = mc_model_checker->process().resolveActor(simgrid::mc::remote(comm->src_proc));
 501       smx_actor_t dst_proc = mc_model_checker->process().resolveActor(simgrid::mc::remote(comm->dst_proc));
 502       if (issuer->host)
 503         label = simgrid::xbt::string_printf("[(%lu)%s] Wait [(%lu)->(%lu)]", issuer->pid,
 504                                             MC_smx_actor_get_host_name(issuer), src_proc ? src_proc->pid : 0,
 505                                             dst_proc ? dst_proc->pid : 0);
 506       else
 507         label = simgrid::xbt::string_printf("[(%lu)] Wait [(%lu)->(%lu)]",
 508                     issuer->pid,
 509                     src_proc ? src_proc->pid : 0,
 510                     dst_proc ? dst_proc->pid : 0);
 511     }
 512     break;
 513   }
 514
 515   case SIMCALL_COMM_TEST: {
 516     smx_activity_t remote_act = simcall_comm_test__get__comm(req);
 517     simgrid::mc::Remote<simgrid::kernel::activity::Comm> temp_comm;
 518     mc_model_checker->process().read(temp_comm, remote(
 519       static_cast<simgrid::kernel::activity::Comm*>(remote_act)));
 520     simgrid::kernel::activity::Comm* comm = temp_comm.getBuffer();
 521     if (comm->src_proc == nullptr || comm->dst_proc == nullptr) {
 522       if (issuer->host)
 523         label = simgrid::xbt::string_printf("[(%lu)%s] Test FALSE", issuer->pid, MC_smx_actor_get_host_name(issuer));
 524       else
 525         label = bprintf("[(%lu)] Test FALSE", issuer->pid);
 526     } else {
 527       if (issuer->host)
 528         label = simgrid::xbt::string_printf("[(%lu)%s] Test TRUE", issuer->pid, MC_smx_actor_get_host_name(issuer));
 529       else
 530         label = simgrid::xbt::string_printf("[(%lu)] Test TRUE", issuer->pid);
 531     }
 532     break;
 533   }
 534
 535   case SIMCALL_COMM_WAITANY: {
 536     unsigned long comms_size = read_length(
 537       mc_model_checker->process(), remote(simcall_comm_waitany__get__comms(req)));
 538     if (issuer->host)
 539       label = simgrid::xbt::string_printf("[(%lu)%s] WaitAny [%d of %lu]", issuer->pid,
 540                                           MC_smx_actor_get_host_name(issuer), value + 1, comms_size);
 541     else
 542       label = simgrid::xbt::string_printf("[(%lu)] WaitAny [%d of %lu]",
 543                   issuer->pid, value + 1, comms_size);
 544     break;
 545   }
 546
 547   case SIMCALL_COMM_TESTANY:
 548     if (value == -1) {
 549       if (issuer->host)
 550         label = simgrid::xbt::string_printf("[(%lu)%s] TestAny FALSE", issuer->pid, MC_smx_actor_get_host_name(issuer));
 551       else
 552         label = simgrid::xbt::string_printf("[(%lu)] TestAny FALSE", issuer->pid);
 553     } else {
 554       if (issuer->host)
 555         label = simgrid::xbt::string_printf("[(%lu)%s] TestAny TRUE [%d of %lu]", issuer->pid,
 556                                             MC_smx_actor_get_host_name(issuer), value + 1,
 557                                             simcall_comm_testany__get__count(req));
 558       else
 559         label = simgrid::xbt::string_printf("[(%lu)] TestAny TRUE [%d of %lu]",
 560                     issuer->pid,
 561                     value + 1,
 562                     simcall_comm_testany__get__count(req));
 563     }
 564     break;
 565
 566   case SIMCALL_MUTEX_TRYLOCK:
 567     label = simgrid::xbt::string_printf("[(%lu)] Mutex TRYLOCK", issuer->pid);
 568     break;
 569
 570   case SIMCALL_MUTEX_LOCK:
 571     label = simgrid::xbt::string_printf("[(%lu)] Mutex LOCK", issuer->pid);
 572     break;
 573
 574   case SIMCALL_MC_RANDOM:
 575     if (issuer->host)
 576       label = simgrid::xbt::string_printf("[(%lu)%s] MC_RANDOM (%d)", issuer->pid, MC_smx_actor_get_host_name(issuer),
 577                                           value);
 578     else
 579       label = simgrid::xbt::string_printf("[(%lu)] MC_RANDOM (%d)", issuer->pid, value);
 580     break;
 581
 582   default:
 583     THROW_UNIMPLEMENTED;
 584   }
 585
 586   const char* color = get_color(issuer->pid - 1);
 587   return  simgrid::xbt::string_printf(
 588         "label = \"%s\", color = %s, fontcolor = %s", label.c_str(),
 589         color, color);
 590 }
 591
 592 }
 593 }