src/mc/mc_request.cpp

   1 /* Copyright (c) 2008-2017. 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 <cassert>
   7
   8 #include "src/include/mc/mc.h"
   9 #include "src/mc/ModelChecker.hpp"
  10 #include "src/mc/mc_request.hpp"
  11 #include "src/mc/mc_smx.hpp"
  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 simgrid::kernel::activity::CommImpl* MC_get_comm(smx_simcall_t r)
  23 {
  24   switch (r->call ) {
  25   case SIMCALL_COMM_WAIT:
  26     return static_cast<simgrid::kernel::activity::CommImpl*>(simcall_comm_wait__getraw__comm(r));
  27   case SIMCALL_COMM_TEST:
  28     return static_cast<simgrid::kernel::activity::CommImpl*>(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
  61   // because those objects are copies:
  62   simgrid::kernel::activity::CommImpl* synchro1 = MC_get_comm(r1);
  63   simgrid::kernel::activity::CommImpl* synchro2 = MC_get_comm(r2);
  64
  65   if ((r1->call == SIMCALL_COMM_ISEND || r1->call == SIMCALL_COMM_IRECV)
  66       && r2->call == SIMCALL_COMM_WAIT) {
  67
  68     smx_mailbox_t mbox = MC_get_mbox(r1);
  69
  70     if (mbox != synchro2->mbox_cpy
  71         && simcall_comm_wait__get__timeout(r2) <= 0)
  72       return false;
  73
  74     if ((r1->issuer != synchro2->src_proc)
  75         && (r1->issuer != synchro2->dst_proc)
  76         && simcall_comm_wait__get__timeout(r2) <= 0)
  77       return false;
  78
  79     if ((r1->call == SIMCALL_COMM_ISEND)
  80         && (synchro2->type == SIMIX_COMM_SEND)
  81         && (synchro2->src_buff !=
  82             simcall_comm_isend__get__src_buff(r1))
  83         && simcall_comm_wait__get__timeout(r2) <= 0)
  84       return false;
  85
  86     if ((r1->call == SIMCALL_COMM_IRECV)
  87         && (synchro2->type == SIMIX_COMM_RECEIVE)
  88         && (synchro2->dst_buff != simcall_comm_irecv__get__dst_buff(r1))
  89         && simcall_comm_wait__get__timeout(r2) <= 0)
  90       return false;
  91   }
  92
  93   /* FIXME: the following rule assumes that the result of the
  94    * isend/irecv call is not stored in a buffer used in the
  95    * test call. */
  96 #if 0
  97   if((r1->call == SIMCALL_COMM_ISEND || r1->call == SIMCALL_COMM_IRECV)
  98      &&  r2->call == SIMCALL_COMM_TEST)
  99      return FALSE;
 100 #endif
 101
 102   if (r1->call == SIMCALL_COMM_WAIT
 103       && (r2->call == SIMCALL_COMM_WAIT || r2->call == SIMCALL_COMM_TEST)
 104       && (synchro1->src_proc == nullptr || synchro1->dst_proc == nullptr))
 105     return false;
 106
 107   if (r1->call == SIMCALL_COMM_TEST &&
 108       (simcall_comm_test__get__comm(r1) == nullptr
 109        || synchro1->src_buff == nullptr
 110        || synchro1->dst_buff == nullptr))
 111     return false;
 112
 113   if (r1->call == SIMCALL_COMM_TEST && r2->call == SIMCALL_COMM_WAIT
 114       && synchro1->src_buff == synchro2->src_buff
 115       && synchro1->dst_buff == synchro2->dst_buff)
 116     return false;
 117
 118   if (r1->call == SIMCALL_COMM_WAIT && r2->call == SIMCALL_COMM_TEST
 119       && synchro1->src_buff != nullptr
 120       && synchro1->dst_buff != nullptr
 121       && synchro2->src_buff != nullptr
 122       && synchro2->dst_buff != nullptr
 123       && synchro1->dst_buff != synchro2->src_buff
 124       && synchro1->dst_buff != synchro2->dst_buff
 125       && synchro2->dst_buff != synchro1->src_buff)
 126     return false;
 127
 128   return true;
 129 }
 130
 131 // Those are internal_req
 132 bool request_depend(smx_simcall_t r1, smx_simcall_t r2)
 133 {
 134   if (r1->issuer == r2->issuer)
 135     return false;
 136
 137   /* Wait with timeout transitions are not considered by the independence theorem, thus we consider them as dependent with all other transitions */
 138   if ((r1->call == SIMCALL_COMM_WAIT && simcall_comm_wait__get__timeout(r1) > 0)
 139       || (r2->call == SIMCALL_COMM_WAIT
 140           && simcall_comm_wait__get__timeout(r2) > 0))
 141     return TRUE;
 142
 143   if (r1->call != r2->call)
 144     return request_depend_asymmetric(r1, r2)
 145       && request_depend_asymmetric(r2, r1);
 146
 147   // Those are internal requests, we do not need indirection
 148   // because those objects are copies:
 149   simgrid::kernel::activity::CommImpl* synchro1 = MC_get_comm(r1);
 150   simgrid::kernel::activity::CommImpl* synchro2 = MC_get_comm(r2);
 151
 152   switch(r1->call) {
 153   case SIMCALL_COMM_ISEND:
 154     return simcall_comm_isend__get__mbox(r1)
 155       == simcall_comm_isend__get__mbox(r2);
 156   case SIMCALL_COMM_IRECV:
 157     return simcall_comm_irecv__get__mbox(r1)
 158       == simcall_comm_irecv__get__mbox(r2);
 159   case SIMCALL_COMM_WAIT:
 160     if (synchro1->src_buff == synchro2->src_buff
 161         && synchro1->dst_buff == synchro2->dst_buff)
 162       return false;
 163     if (synchro1->src_buff != nullptr && synchro1->dst_buff != nullptr && synchro2->src_buff != nullptr &&
 164         synchro2->dst_buff != nullptr && synchro1->dst_buff != synchro2->src_buff &&
 165         synchro1->dst_buff != synchro2->dst_buff && synchro2->dst_buff != synchro1->src_buff)
 166       return false;
 167     return true;
 168   default:
 169     return true;
 170   }
 171 }
 172
 173 }
 174 }
 175
 176 static char *pointer_to_string(void *pointer)
 177 {
 178
 179   if (XBT_LOG_ISENABLED(mc_request, xbt_log_priority_verbose))
 180     return bprintf("%p", pointer);
 181
 182   return xbt_strdup("(verbose only)");
 183 }
 184
 185 static char *buff_size_to_string(size_t buff_size)
 186 {
 187
 188   if (XBT_LOG_ISENABLED(mc_request, xbt_log_priority_verbose))
 189     return bprintf("%zu", buff_size);
 190
 191   return xbt_strdup("(verbose only)");
 192 }
 193
 194
 195 std::string simgrid::mc::request_to_string(smx_simcall_t req, int value, simgrid::mc::RequestType request_type)
 196 {
 197   xbt_assert(mc_model_checker != nullptr, "Must be called from MCer");
 198
 199   bool use_remote_comm = true;
 200   switch(request_type) {
 201   case simgrid::mc::RequestType::simix:
 202     use_remote_comm = true;
 203     break;
 204   case simgrid::mc::RequestType::executed:
 205   case simgrid::mc::RequestType::internal:
 206     use_remote_comm = false;
 207     break;
 208   default:
 209     THROW_IMPOSSIBLE;
 210   }
 211
 212   const char* type = nullptr;
 213   char *args = nullptr;
 214
 215   smx_actor_t issuer = MC_smx_simcall_get_issuer(req);
 216
 217   switch (req->call) {
 218
 219   case SIMCALL_COMM_ISEND: {
 220     type = "iSend";
 221     char* p = pointer_to_string(simcall_comm_isend__get__src_buff(req));
 222     char* bs = buff_size_to_string(simcall_comm_isend__get__src_buff_size(req));
 223     if (issuer->host)
 224       args = bprintf("src=(%lu)%s (%s), buff=%s, size=%s", issuer->pid, MC_smx_actor_get_host_name(issuer),
 225                      MC_smx_actor_get_name(issuer), p, bs);
 226     else
 227       args = bprintf("src=(%lu)%s, buff=%s, size=%s", issuer->pid, MC_smx_actor_get_name(issuer), p, bs);
 228     xbt_free(bs);
 229     xbt_free(p);
 230     break;
 231   }
 232
 233   case SIMCALL_COMM_IRECV: {
 234     size_t* remote_size = simcall_comm_irecv__get__dst_buff_size(req);
 235     size_t size = 0;
 236     if (remote_size)
 237       mc_model_checker->process().read_bytes(&size, sizeof(size),
 238         remote(remote_size));
 239
 240     type = "iRecv";
 241     char* p = pointer_to_string(simcall_comm_irecv__get__dst_buff(req));
 242     char* bs = buff_size_to_string(size);
 243     if (issuer->host)
 244       args = bprintf("dst=(%lu)%s (%s), buff=%s, size=%s", issuer->pid, MC_smx_actor_get_host_name(issuer),
 245                      MC_smx_actor_get_name(issuer), p, bs);
 246     else
 247       args = bprintf("dst=(%lu)%s, buff=%s, size=%s", issuer->pid, MC_smx_actor_get_name(issuer), p, bs);
 248     xbt_free(bs);
 249     xbt_free(p);
 250     break;
 251   }
 252
 253   case SIMCALL_COMM_WAIT: {
 254     simgrid::kernel::activity::CommImpl* remote_act =
 255         static_cast<simgrid::kernel::activity::CommImpl*>(simcall_comm_wait__getraw__comm(req));
 256     char* p;
 257     if (value == -1) {
 258       type = "WaitTimeout";
 259       p = pointer_to_string(remote_act);
 260       args = bprintf("comm=%s", p);
 261     } else {
 262       type = "Wait";
 263       p = pointer_to_string(remote_act);
 264
 265       simgrid::mc::Remote<simgrid::kernel::activity::CommImpl> temp_synchro;
 266       simgrid::kernel::activity::CommImpl* act;
 267       if (use_remote_comm) {
 268         mc_model_checker->process().read(temp_synchro,
 269                                          remote(static_cast<simgrid::kernel::activity::CommImpl*>(remote_act)));
 270         act = temp_synchro.getBuffer();
 271       } else
 272         act = remote_act;
 273
 274       smx_actor_t src_proc = mc_model_checker->process().resolveActor(simgrid::mc::remote(act->src_proc));
 275       smx_actor_t dst_proc = mc_model_checker->process().resolveActor(simgrid::mc::remote(act->dst_proc));
 276       args =
 277           bprintf("comm=%s [(%lu)%s (%s)-> (%lu)%s (%s)]", p, src_proc ? src_proc->pid : 0,
 278                   src_proc ? MC_smx_actor_get_host_name(src_proc) : "", src_proc ? MC_smx_actor_get_name(src_proc) : "",
 279                   dst_proc ? dst_proc->pid : 0, dst_proc ? MC_smx_actor_get_host_name(dst_proc) : "",
 280                   dst_proc ? MC_smx_actor_get_name(dst_proc) : "");
 281     }
 282     xbt_free(p);
 283     break;
 284   }
 285
 286   case SIMCALL_COMM_TEST: {
 287     simgrid::kernel::activity::CommImpl* remote_act =
 288         static_cast<simgrid::kernel::activity::CommImpl*>(simcall_comm_test__getraw__comm(req));
 289     simgrid::mc::Remote<simgrid::kernel::activity::CommImpl> temp_synchro;
 290     simgrid::kernel::activity::CommImpl* act;
 291     if (use_remote_comm) {
 292       mc_model_checker->process().read(temp_synchro,
 293                                        remote(static_cast<simgrid::kernel::activity::CommImpl*>(remote_act)));
 294       act = temp_synchro.getBuffer();
 295     } else
 296       act = remote_act;
 297
 298     char* p;
 299     if (act->src_proc == nullptr || act->dst_proc == nullptr) {
 300       type = "Test FALSE";
 301       p = pointer_to_string(remote_act);
 302       args = bprintf("comm=%s", p);
 303     } else {
 304       type = "Test TRUE";
 305       p = pointer_to_string(remote_act);
 306
 307       smx_actor_t src_proc = mc_model_checker->process().resolveActor(simgrid::mc::remote(act->src_proc));
 308       smx_actor_t dst_proc = mc_model_checker->process().resolveActor(simgrid::mc::remote(act->dst_proc));
 309       args = bprintf("comm=%s [(%lu)%s (%s) -> (%lu)%s (%s)]", p, src_proc->pid, MC_smx_actor_get_name(src_proc),
 310                      MC_smx_actor_get_host_name(src_proc), dst_proc->pid, MC_smx_actor_get_name(dst_proc),
 311                      MC_smx_actor_get_host_name(dst_proc));
 312     }
 313     xbt_free(p);
 314     break;
 315   }
 316
 317   case SIMCALL_COMM_WAITANY: {
 318     type = "WaitAny";
 319     s_xbt_dynar_t comms;
 320     mc_model_checker->process().read_bytes(
 321       &comms, sizeof(comms), remote(simcall_comm_waitany__get__comms(req)));
 322     if (not xbt_dynar_is_empty(&comms)) {
 323       smx_activity_t remote_sync;
 324       read_element(mc_model_checker->process(),
 325         &remote_sync, remote(simcall_comm_waitany__get__comms(req)), value,
 326         sizeof(remote_sync));
 327       char* p = pointer_to_string(remote_sync.get());
 328       args = bprintf("comm=%s (%d of %lu)",
 329         p, value + 1, xbt_dynar_length(&comms));
 330       xbt_free(p);
 331     } else
 332       args = bprintf("comm at idx %d", value);
 333     break;
 334   }
 335
 336   case SIMCALL_COMM_TESTANY:
 337     if (value == -1) {
 338       type = "TestAny FALSE";
 339       args = xbt_strdup("-");
 340     } else {
 341       type = "TestAny";
 342       args =
 343           bprintf("(%d of %zu)", value + 1,
 344                     simcall_comm_testany__get__count(req));
 345     }
 346     break;
 347
 348   case SIMCALL_MUTEX_TRYLOCK:
 349   case SIMCALL_MUTEX_LOCK: {
 350     if (req->call == SIMCALL_MUTEX_LOCK)
 351       type = "Mutex LOCK";
 352     else
 353       type = "Mutex TRYLOCK";
 354
 355     simgrid::mc::Remote<simgrid::simix::MutexImpl> mutex;
 356     mc_model_checker->process().read_bytes(mutex.getBuffer(), sizeof(mutex),
 357       remote(
 358         req->call == SIMCALL_MUTEX_LOCK
 359         ? simcall_mutex_lock__get__mutex(req)
 360         : simcall_mutex_trylock__get__mutex(req)
 361       ));
 362     s_xbt_swag_t mutex_sleeping;
 363     mc_model_checker->process().read_bytes(&mutex_sleeping, sizeof(mutex_sleeping),
 364       remote(mutex.getBuffer()->sleeping));
 365
 366     args =
 367         bprintf("locked = %d, owner = %d, sleeping = %d", mutex.getBuffer()->locked,
 368                 mutex.getBuffer()->owner != nullptr
 369                     ? (int)mc_model_checker->process().resolveActor(simgrid::mc::remote(mutex.getBuffer()->owner))->pid
 370                     : -1,
 371                 mutex_sleeping.count);
 372     break;
 373   }
 374
 375   case SIMCALL_MC_RANDOM:
 376     type = "MC_RANDOM";
 377     args = bprintf("%d", value);
 378     break;
 379
 380   default:
 381     type = SIMIX_simcall_name(req->call);
 382     args = bprintf("??");
 383     break;
 384   }
 385
 386   std::string str;
 387   if (args != nullptr)
 388     str = simgrid::xbt::string_printf("[(%lu)%s (%s)] %s(%s)", issuer->pid, MC_smx_actor_get_host_name(issuer),
 389                                       MC_smx_actor_get_name(issuer), type, args);
 390   else
 391     str = simgrid::xbt::string_printf("[(%lu)%s (%s)] %s ", issuer->pid, MC_smx_actor_get_host_name(issuer),
 392                                       MC_smx_actor_get_name(issuer), type);
 393   xbt_free(args);
 394   return str;
 395 }
 396
 397 namespace simgrid {
 398 namespace mc {
 399
 400 bool request_is_enabled_by_idx(smx_simcall_t req, unsigned int idx)
 401 {
 402   simgrid::kernel::activity::ActivityImpl* remote_act = nullptr;
 403   switch (req->call) {
 404
 405   case SIMCALL_COMM_WAIT:
 406     /* FIXME: check also that src and dst processes are not suspended */
 407     remote_act = simcall_comm_wait__getraw__comm(req);
 408     break;
 409
 410   case SIMCALL_COMM_WAITANY:
 411     read_element(mc_model_checker->process(), &remote_act, remote(simcall_comm_waitany__getraw__comms(req)), idx,
 412                  sizeof(remote_act));
 413     break;
 414
 415   case SIMCALL_COMM_TESTANY:
 416     remote_act = mc_model_checker->process().read(remote(simcall_comm_testany__getraw__comms(req) + idx));
 417     break;
 418
 419   default:
 420     return true;
 421   }
 422
 423   simgrid::mc::Remote<simgrid::kernel::activity::CommImpl> temp_comm;
 424   mc_model_checker->process().read(temp_comm, remote(static_cast<simgrid::kernel::activity::CommImpl*>(remote_act)));
 425   simgrid::kernel::activity::CommImpl* comm = temp_comm.getBuffer();
 426   return comm->src_proc && comm->dst_proc;
 427 }
 428
 429
 430 static const char* colors[] = {
 431   "blue",
 432   "red",
 433   "green3",
 434   "goldenrod",
 435   "brown",
 436   "purple",
 437   "magenta",
 438   "turquoise4",
 439   "gray25",
 440   "forestgreen",
 441   "hotpink",
 442   "lightblue",
 443   "tan",
 444 };
 445
 446 static inline const char* get_color(int id)
 447 {
 448   return colors[id % (sizeof(colors) / sizeof(colors[0])) ];
 449 }
 450
 451 std::string request_get_dot_output(smx_simcall_t req, int value)
 452 {
 453   std::string label;
 454
 455   const smx_actor_t issuer = MC_smx_simcall_get_issuer(req);
 456
 457   switch (req->call) {
 458   case SIMCALL_COMM_ISEND:
 459     if (issuer->host)
 460       label = simgrid::xbt::string_printf("[(%lu)%s] iSend", issuer->pid, MC_smx_actor_get_host_name(issuer));
 461     else
 462       label = bprintf("[(%lu)] iSend", issuer->pid);
 463     break;
 464
 465   case SIMCALL_COMM_IRECV:
 466     if (issuer->host)
 467       label = simgrid::xbt::string_printf("[(%lu)%s] iRecv", issuer->pid, MC_smx_actor_get_host_name(issuer));
 468     else
 469       label = simgrid::xbt::string_printf("[(%lu)] iRecv", issuer->pid);
 470     break;
 471
 472   case SIMCALL_COMM_WAIT:
 473     if (value == -1) {
 474       if (issuer->host)
 475         label = simgrid::xbt::string_printf("[(%lu)%s] WaitTimeout", issuer->pid, MC_smx_actor_get_host_name(issuer));
 476       else
 477         label = simgrid::xbt::string_printf("[(%lu)] WaitTimeout", issuer->pid);
 478     } else {
 479       simgrid::kernel::activity::ActivityImpl* remote_act = simcall_comm_wait__getraw__comm(req);
 480       simgrid::mc::Remote<simgrid::kernel::activity::CommImpl> temp_comm;
 481       mc_model_checker->process().read(temp_comm,
 482                                        remote(static_cast<simgrid::kernel::activity::CommImpl*>(remote_act)));
 483       simgrid::kernel::activity::CommImpl* comm = temp_comm.getBuffer();
 484
 485       smx_actor_t src_proc = mc_model_checker->process().resolveActor(simgrid::mc::remote(comm->src_proc));
 486       smx_actor_t dst_proc = mc_model_checker->process().resolveActor(simgrid::mc::remote(comm->dst_proc));
 487       if (issuer->host)
 488         label = simgrid::xbt::string_printf("[(%lu)%s] Wait [(%lu)->(%lu)]", issuer->pid,
 489                                             MC_smx_actor_get_host_name(issuer), src_proc ? src_proc->pid : 0,
 490                                             dst_proc ? dst_proc->pid : 0);
 491       else
 492         label = simgrid::xbt::string_printf("[(%lu)] Wait [(%lu)->(%lu)]",
 493                     issuer->pid,
 494                     src_proc ? src_proc->pid : 0,
 495                     dst_proc ? dst_proc->pid : 0);
 496     }
 497     break;
 498
 499   case SIMCALL_COMM_TEST: {
 500     simgrid::kernel::activity::ActivityImpl* remote_act = simcall_comm_test__getraw__comm(req);
 501     simgrid::mc::Remote<simgrid::kernel::activity::CommImpl> temp_comm;
 502     mc_model_checker->process().read(temp_comm, remote(static_cast<simgrid::kernel::activity::CommImpl*>(remote_act)));
 503     simgrid::kernel::activity::CommImpl* comm = temp_comm.getBuffer();
 504     if (comm->src_proc == nullptr || comm->dst_proc == nullptr) {
 505       if (issuer->host)
 506         label = simgrid::xbt::string_printf("[(%lu)%s] Test FALSE", issuer->pid, MC_smx_actor_get_host_name(issuer));
 507       else
 508         label = bprintf("[(%lu)] Test FALSE", issuer->pid);
 509     } else {
 510       if (issuer->host)
 511         label = simgrid::xbt::string_printf("[(%lu)%s] Test TRUE", issuer->pid, MC_smx_actor_get_host_name(issuer));
 512       else
 513         label = simgrid::xbt::string_printf("[(%lu)] Test TRUE", issuer->pid);
 514     }
 515     break;
 516   }
 517
 518   case SIMCALL_COMM_WAITANY: {
 519     unsigned long comms_size = read_length(
 520       mc_model_checker->process(), remote(simcall_comm_waitany__get__comms(req)));
 521     if (issuer->host)
 522       label = simgrid::xbt::string_printf("[(%lu)%s] WaitAny [%d of %lu]", issuer->pid,
 523                                           MC_smx_actor_get_host_name(issuer), value + 1, comms_size);
 524     else
 525       label = simgrid::xbt::string_printf("[(%lu)] WaitAny [%d of %lu]",
 526                   issuer->pid, value + 1, comms_size);
 527     break;
 528   }
 529
 530   case SIMCALL_COMM_TESTANY:
 531     if (value == -1) {
 532       if (issuer->host)
 533         label = simgrid::xbt::string_printf("[(%lu)%s] TestAny FALSE", issuer->pid, MC_smx_actor_get_host_name(issuer));
 534       else
 535         label = simgrid::xbt::string_printf("[(%lu)] TestAny FALSE", issuer->pid);
 536     } else {
 537       if (issuer->host)
 538         label = simgrid::xbt::string_printf("[(%lu)%s] TestAny TRUE [%d of %lu]", issuer->pid,
 539                                             MC_smx_actor_get_host_name(issuer), value + 1,
 540                                             simcall_comm_testany__get__count(req));
 541       else
 542         label = simgrid::xbt::string_printf("[(%lu)] TestAny TRUE [%d of %lu]",
 543                     issuer->pid,
 544                     value + 1,
 545                     simcall_comm_testany__get__count(req));
 546     }
 547     break;
 548
 549   case SIMCALL_MUTEX_TRYLOCK:
 550     label = simgrid::xbt::string_printf("[(%lu)] Mutex TRYLOCK", issuer->pid);
 551     break;
 552
 553   case SIMCALL_MUTEX_LOCK:
 554     label = simgrid::xbt::string_printf("[(%lu)] Mutex LOCK", issuer->pid);
 555     break;
 556
 557   case SIMCALL_MC_RANDOM:
 558     if (issuer->host)
 559       label = simgrid::xbt::string_printf("[(%lu)%s] MC_RANDOM (%d)", issuer->pid, MC_smx_actor_get_host_name(issuer),
 560                                           value);
 561     else
 562       label = simgrid::xbt::string_printf("[(%lu)] MC_RANDOM (%d)", issuer->pid, value);
 563     break;
 564
 565   default:
 566     THROW_UNIMPLEMENTED;
 567   }
 568
 569   const char* color = get_color(issuer->pid - 1);
 570   return  simgrid::xbt::string_printf(
 571         "label = \"%s\", color = %s, fontcolor = %s", label.c_str(),
 572         color, color);
 573 }
 574
 575 }
 576 }