src/mc/mc_request.cpp

   1 /* Copyright (c) 2008-2018. 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/kernel/activity/MutexImpl.hpp"
  10 #include "src/mc/ModelChecker.hpp"
  11 #include "src/mc/mc_request.hpp"
  12 #include "src/mc/mc_smx.hpp"
  13 #include "src/mc/mc_xbt.hpp"
  14
  15 using simgrid::mc::remote;
  16
  17 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_request, mc,
  18                                 "Logging specific to MC (request)");
  19
  20 static char *pointer_to_string(void *pointer);
  21 static char *buff_size_to_string(size_t size);
  22
  23 static inline simgrid::kernel::activity::CommImpl* MC_get_comm(smx_simcall_t r)
  24 {
  25   switch (r->call ) {
  26   case SIMCALL_COMM_WAIT:
  27     return static_cast<simgrid::kernel::activity::CommImpl*>(simcall_comm_wait__getraw__comm(r));
  28   case SIMCALL_COMM_TEST:
  29     return static_cast<simgrid::kernel::activity::CommImpl*>(simcall_comm_test__getraw__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::CommImpl* synchro1 = MC_get_comm(r1);
  64   simgrid::kernel::activity::CommImpl* 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::CommImpl* synchro1 = MC_get_comm(r1);
 151   simgrid::kernel::activity::CommImpl* 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     if (synchro1->src_buff != nullptr && synchro1->dst_buff != nullptr && synchro2->src_buff != nullptr &&
 165         synchro2->dst_buff != nullptr && synchro1->dst_buff != synchro2->src_buff &&
 166         synchro1->dst_buff != synchro2->dst_buff && synchro2->dst_buff != synchro1->src_buff)
 167       return false;
 168     return true;
 169   default:
 170     return true;
 171   }
 172 }
 173
 174 }
 175 }
 176
 177 static char *pointer_to_string(void *pointer)
 178 {
 179
 180   if (XBT_LOG_ISENABLED(mc_request, xbt_log_priority_verbose))
 181     return bprintf("%p", pointer);
 182
 183   return xbt_strdup("(verbose only)");
 184 }
 185
 186 static char *buff_size_to_string(size_t buff_size)
 187 {
 188
 189   if (XBT_LOG_ISENABLED(mc_request, xbt_log_priority_verbose))
 190     return bprintf("%zu", buff_size);
 191
 192   return xbt_strdup("(verbose only)");
 193 }
 194
 195
 196 std::string simgrid::mc::request_to_string(smx_simcall_t req, int value, simgrid::mc::RequestType request_type)
 197 {
 198   xbt_assert(mc_model_checker != nullptr, "Must be called from MCer");
 199
 200   bool use_remote_comm = true;
 201   switch(request_type) {
 202   case simgrid::mc::RequestType::simix:
 203     use_remote_comm = true;
 204     break;
 205   case simgrid::mc::RequestType::executed:
 206   case simgrid::mc::RequestType::internal:
 207     use_remote_comm = false;
 208     break;
 209   default:
 210     THROW_IMPOSSIBLE;
 211   }
 212
 213   const char* type = nullptr;
 214   char *args = nullptr;
 215
 216   smx_actor_t issuer = MC_smx_simcall_get_issuer(req);
 217
 218   switch (req->call) {
 219
 220   case SIMCALL_COMM_ISEND: {
 221     type = "iSend";
 222     char* p = pointer_to_string(simcall_comm_isend__get__src_buff(req));
 223     char* bs = buff_size_to_string(simcall_comm_isend__get__src_buff_size(req));
 224     if (issuer->host)
 225       args = bprintf("src=(%ld)%s (%s), buff=%s, size=%s", issuer->pid, MC_smx_actor_get_host_name(issuer),
 226                      MC_smx_actor_get_name(issuer), p, bs);
 227     else
 228       args = bprintf("src=(%ld)%s, buff=%s, size=%s", issuer->pid, MC_smx_actor_get_name(issuer), p, bs);
 229     xbt_free(bs);
 230     xbt_free(p);
 231     break;
 232   }
 233
 234   case SIMCALL_COMM_IRECV: {
 235     size_t* remote_size = simcall_comm_irecv__get__dst_buff_size(req);
 236     size_t size = 0;
 237     if (remote_size)
 238       mc_model_checker->process().read_bytes(&size, sizeof(size),
 239         remote(remote_size));
 240
 241     type = "iRecv";
 242     char* p = pointer_to_string(simcall_comm_irecv__get__dst_buff(req));
 243     char* bs = buff_size_to_string(size);
 244     if (issuer->host)
 245       args = bprintf("dst=(%ld)%s (%s), buff=%s, size=%s", issuer->pid, MC_smx_actor_get_host_name(issuer),
 246                      MC_smx_actor_get_name(issuer), p, bs);
 247     else
 248       args = bprintf("dst=(%ld)%s, buff=%s, size=%s", issuer->pid, MC_smx_actor_get_name(issuer), p, bs);
 249     xbt_free(bs);
 250     xbt_free(p);
 251     break;
 252   }
 253
 254   case SIMCALL_COMM_WAIT: {
 255     simgrid::kernel::activity::CommImpl* remote_act =
 256         static_cast<simgrid::kernel::activity::CommImpl*>(simcall_comm_wait__getraw__comm(req));
 257     char* p;
 258     if (value == -1) {
 259       type = "WaitTimeout";
 260       p = pointer_to_string(remote_act);
 261       args = bprintf("comm=%s", p);
 262     } else {
 263       type = "Wait";
 264       p = pointer_to_string(remote_act);
 265
 266       simgrid::mc::Remote<simgrid::kernel::activity::CommImpl> temp_synchro;
 267       simgrid::kernel::activity::CommImpl* act;
 268       if (use_remote_comm) {
 269         mc_model_checker->process().read(temp_synchro,
 270                                          remote(static_cast<simgrid::kernel::activity::CommImpl*>(remote_act)));
 271         act = temp_synchro.getBuffer();
 272       } else
 273         act = remote_act;
 274
 275       smx_actor_t src_proc = mc_model_checker->process().resolveActor(simgrid::mc::remote(act->src_proc));
 276       smx_actor_t dst_proc = mc_model_checker->process().resolveActor(simgrid::mc::remote(act->dst_proc));
 277       args =
 278           bprintf("comm=%s [(%ld)%s (%s)-> (%ld)%s (%s)]", p, src_proc ? src_proc->pid : 0,
 279                   src_proc ? MC_smx_actor_get_host_name(src_proc) : "", src_proc ? MC_smx_actor_get_name(src_proc) : "",
 280                   dst_proc ? dst_proc->pid : 0, dst_proc ? MC_smx_actor_get_host_name(dst_proc) : "",
 281                   dst_proc ? MC_smx_actor_get_name(dst_proc) : "");
 282     }
 283     xbt_free(p);
 284     break;
 285   }
 286
 287   case SIMCALL_COMM_TEST: {
 288     simgrid::kernel::activity::CommImpl* remote_act =
 289         static_cast<simgrid::kernel::activity::CommImpl*>(simcall_comm_test__getraw__comm(req));
 290     simgrid::mc::Remote<simgrid::kernel::activity::CommImpl> temp_synchro;
 291     simgrid::kernel::activity::CommImpl* act;
 292     if (use_remote_comm) {
 293       mc_model_checker->process().read(temp_synchro,
 294                                        remote(static_cast<simgrid::kernel::activity::CommImpl*>(remote_act)));
 295       act = temp_synchro.getBuffer();
 296     } else
 297       act = remote_act;
 298
 299     char* p;
 300     if (act->src_proc == nullptr || act->dst_proc == nullptr) {
 301       type = "Test FALSE";
 302       p = pointer_to_string(remote_act);
 303       args = bprintf("comm=%s", p);
 304     } else {
 305       type = "Test TRUE";
 306       p = pointer_to_string(remote_act);
 307
 308       smx_actor_t src_proc = mc_model_checker->process().resolveActor(simgrid::mc::remote(act->src_proc));
 309       smx_actor_t dst_proc = mc_model_checker->process().resolveActor(simgrid::mc::remote(act->dst_proc));
 310       args = bprintf("comm=%s [(%ld)%s (%s) -> (%ld)%s (%s)]", p, src_proc->pid, MC_smx_actor_get_name(src_proc),
 311                      MC_smx_actor_get_host_name(src_proc), dst_proc->pid, MC_smx_actor_get_name(dst_proc),
 312                      MC_smx_actor_get_host_name(dst_proc));
 313     }
 314     xbt_free(p);
 315     break;
 316   }
 317
 318   case SIMCALL_COMM_WAITANY: {
 319     type = "WaitAny";
 320     s_xbt_dynar_t comms;
 321     mc_model_checker->process().read_bytes(
 322       &comms, sizeof(comms), remote(simcall_comm_waitany__get__comms(req)));
 323     if (not xbt_dynar_is_empty(&comms)) {
 324       smx_activity_t remote_sync;
 325       read_element(mc_model_checker->process(),
 326         &remote_sync, remote(simcall_comm_waitany__get__comms(req)), value,
 327         sizeof(remote_sync));
 328       char* p = pointer_to_string(remote_sync.get());
 329       args = bprintf("comm=%s (%d of %lu)",
 330         p, value + 1, xbt_dynar_length(&comms));
 331       xbt_free(p);
 332     } else
 333       args = bprintf("comm at idx %d", value);
 334     break;
 335   }
 336
 337   case SIMCALL_COMM_TESTANY:
 338     if (value == -1) {
 339       type = "TestAny FALSE";
 340       args = xbt_strdup("-");
 341     } else {
 342       type = "TestAny";
 343       args =
 344           bprintf("(%d of %zu)", value + 1,
 345                     simcall_comm_testany__get__count(req));
 346     }
 347     break;
 348
 349   case SIMCALL_MUTEX_TRYLOCK:
 350   case SIMCALL_MUTEX_LOCK: {
 351     if (req->call == SIMCALL_MUTEX_LOCK)
 352       type = "Mutex LOCK";
 353     else
 354       type = "Mutex TRYLOCK";
 355
 356     simgrid::mc::Remote<simgrid::kernel::activity::MutexImpl> mutex;
 357     mc_model_checker->process().read_bytes(mutex.getBuffer(), sizeof(mutex),
 358       remote(
 359         req->call == SIMCALL_MUTEX_LOCK
 360         ? simcall_mutex_lock__get__mutex(req)
 361         : simcall_mutex_trylock__get__mutex(req)
 362       ));
 363     args =
 364         bprintf("locked = %d, owner = %d, sleeping = n/a", mutex.getBuffer()->locked,
 365                 mutex.getBuffer()->owner != nullptr
 366                     ? (int)mc_model_checker->process().resolveActor(simgrid::mc::remote(mutex.getBuffer()->owner))->pid
 367                     : -1);
 368     break;
 369   }
 370
 371   case SIMCALL_MC_RANDOM:
 372     type = "MC_RANDOM";
 373     args = bprintf("%d", value);
 374     break;
 375
 376   default:
 377     type = SIMIX_simcall_name(req->call);
 378     args = bprintf("??");
 379     break;
 380   }
 381
 382   std::string str;
 383   if (args != nullptr)
 384     str = simgrid::xbt::string_printf("[(%ld)%s (%s)] %s(%s)", issuer->pid, MC_smx_actor_get_host_name(issuer),
 385                                       MC_smx_actor_get_name(issuer), type, args);
 386   else
 387     str = simgrid::xbt::string_printf("[(%ld)%s (%s)] %s ", issuer->pid, MC_smx_actor_get_host_name(issuer),
 388                                       MC_smx_actor_get_name(issuer), type);
 389   xbt_free(args);
 390   return str;
 391 }
 392
 393 namespace simgrid {
 394 namespace mc {
 395
 396 bool request_is_enabled_by_idx(smx_simcall_t req, unsigned int idx)
 397 {
 398   simgrid::kernel::activity::ActivityImpl* remote_act = nullptr;
 399   switch (req->call) {
 400
 401   case SIMCALL_COMM_WAIT:
 402     /* FIXME: check also that src and dst processes are not suspended */
 403     remote_act = simcall_comm_wait__getraw__comm(req);
 404     break;
 405
 406   case SIMCALL_COMM_WAITANY:
 407     read_element(mc_model_checker->process(), &remote_act, remote(simcall_comm_waitany__getraw__comms(req)), idx,
 408                  sizeof(remote_act));
 409     break;
 410
 411   case SIMCALL_COMM_TESTANY:
 412     remote_act = mc_model_checker->process().read(remote(simcall_comm_testany__getraw__comms(req) + idx));
 413     break;
 414
 415   default:
 416     return true;
 417   }
 418
 419   simgrid::mc::Remote<simgrid::kernel::activity::CommImpl> temp_comm;
 420   mc_model_checker->process().read(temp_comm, remote(static_cast<simgrid::kernel::activity::CommImpl*>(remote_act)));
 421   simgrid::kernel::activity::CommImpl* comm = temp_comm.getBuffer();
 422   return comm->src_proc && comm->dst_proc;
 423 }
 424
 425
 426 static const char* colors[] = {
 427   "blue",
 428   "red",
 429   "green3",
 430   "goldenrod",
 431   "brown",
 432   "purple",
 433   "magenta",
 434   "turquoise4",
 435   "gray25",
 436   "forestgreen",
 437   "hotpink",
 438   "lightblue",
 439   "tan",
 440 };
 441
 442 static inline const char* get_color(int id)
 443 {
 444   return colors[id % (sizeof(colors) / sizeof(colors[0])) ];
 445 }
 446
 447 std::string request_get_dot_output(smx_simcall_t req, int value)
 448 {
 449   std::string label;
 450
 451   const smx_actor_t issuer = MC_smx_simcall_get_issuer(req);
 452
 453   switch (req->call) {
 454   case SIMCALL_COMM_ISEND:
 455     if (issuer->host)
 456       label = simgrid::xbt::string_printf("[(%ld)%s] iSend", issuer->pid, MC_smx_actor_get_host_name(issuer));
 457     else
 458       label = bprintf("[(%ld)] iSend", issuer->pid);
 459     break;
 460
 461   case SIMCALL_COMM_IRECV:
 462     if (issuer->host)
 463       label = simgrid::xbt::string_printf("[(%ld)%s] iRecv", issuer->pid, MC_smx_actor_get_host_name(issuer));
 464     else
 465       label = simgrid::xbt::string_printf("[(%ld)] iRecv", issuer->pid);
 466     break;
 467
 468   case SIMCALL_COMM_WAIT:
 469     if (value == -1) {
 470       if (issuer->host)
 471         label = simgrid::xbt::string_printf("[(%ld)%s] WaitTimeout", issuer->pid, MC_smx_actor_get_host_name(issuer));
 472       else
 473         label = simgrid::xbt::string_printf("[(%ld)] WaitTimeout", issuer->pid);
 474     } else {
 475       simgrid::kernel::activity::ActivityImpl* remote_act = simcall_comm_wait__getraw__comm(req);
 476       simgrid::mc::Remote<simgrid::kernel::activity::CommImpl> temp_comm;
 477       mc_model_checker->process().read(temp_comm,
 478                                        remote(static_cast<simgrid::kernel::activity::CommImpl*>(remote_act)));
 479       simgrid::kernel::activity::CommImpl* comm = temp_comm.getBuffer();
 480
 481       smx_actor_t src_proc = mc_model_checker->process().resolveActor(simgrid::mc::remote(comm->src_proc));
 482       smx_actor_t dst_proc = mc_model_checker->process().resolveActor(simgrid::mc::remote(comm->dst_proc));
 483       if (issuer->host)
 484         label = simgrid::xbt::string_printf("[(%ld)%s] Wait [(%ld)->(%ld)]", issuer->pid,
 485                                             MC_smx_actor_get_host_name(issuer), src_proc ? src_proc->pid : 0,
 486                                             dst_proc ? dst_proc->pid : 0);
 487       else
 488         label = simgrid::xbt::string_printf("[(%ld)] Wait [(%ld)->(%ld)]",
 489                     issuer->pid,
 490                     src_proc ? src_proc->pid : 0,
 491                     dst_proc ? dst_proc->pid : 0);
 492     }
 493     break;
 494
 495   case SIMCALL_COMM_TEST: {
 496     simgrid::kernel::activity::ActivityImpl* remote_act = simcall_comm_test__getraw__comm(req);
 497     simgrid::mc::Remote<simgrid::kernel::activity::CommImpl> temp_comm;
 498     mc_model_checker->process().read(temp_comm, remote(static_cast<simgrid::kernel::activity::CommImpl*>(remote_act)));
 499     simgrid::kernel::activity::CommImpl* comm = temp_comm.getBuffer();
 500     if (comm->src_proc == nullptr || comm->dst_proc == nullptr) {
 501       if (issuer->host)
 502         label = simgrid::xbt::string_printf("[(%ld)%s] Test FALSE", issuer->pid, MC_smx_actor_get_host_name(issuer));
 503       else
 504         label = bprintf("[(%ld)] Test FALSE", issuer->pid);
 505     } else {
 506       if (issuer->host)
 507         label = simgrid::xbt::string_printf("[(%ld)%s] Test TRUE", issuer->pid, MC_smx_actor_get_host_name(issuer));
 508       else
 509         label = simgrid::xbt::string_printf("[(%ld)] Test TRUE", issuer->pid);
 510     }
 511     break;
 512   }
 513
 514   case SIMCALL_COMM_WAITANY: {
 515     unsigned long comms_size = read_length(
 516       mc_model_checker->process(), remote(simcall_comm_waitany__get__comms(req)));
 517     if (issuer->host)
 518       label = simgrid::xbt::string_printf("[(%ld)%s] WaitAny [%d of %lu]", issuer->pid,
 519                                           MC_smx_actor_get_host_name(issuer), value + 1, comms_size);
 520     else
 521       label = simgrid::xbt::string_printf("[(%ld)] WaitAny [%d of %lu]",
 522                   issuer->pid, value + 1, comms_size);
 523     break;
 524   }
 525
 526   case SIMCALL_COMM_TESTANY:
 527     if (value == -1) {
 528       if (issuer->host)
 529         label = simgrid::xbt::string_printf("[(%ld)%s] TestAny FALSE", issuer->pid, MC_smx_actor_get_host_name(issuer));
 530       else
 531         label = simgrid::xbt::string_printf("[(%ld)] TestAny FALSE", issuer->pid);
 532     } else {
 533       if (issuer->host)
 534         label = simgrid::xbt::string_printf("[(%ld)%s] TestAny TRUE [%d of %lu]", issuer->pid,
 535                                             MC_smx_actor_get_host_name(issuer), value + 1,
 536                                             simcall_comm_testany__get__count(req));
 537       else
 538         label = simgrid::xbt::string_printf("[(%ld)] TestAny TRUE [%d of %lu]",
 539                     issuer->pid,
 540                     value + 1,
 541                     simcall_comm_testany__get__count(req));
 542     }
 543     break;
 544
 545   case SIMCALL_MUTEX_TRYLOCK:
 546     label = simgrid::xbt::string_printf("[(%ld)] Mutex TRYLOCK", issuer->pid);
 547     break;
 548
 549   case SIMCALL_MUTEX_LOCK:
 550     label = simgrid::xbt::string_printf("[(%ld)] Mutex LOCK", issuer->pid);
 551     break;
 552
 553   case SIMCALL_MC_RANDOM:
 554     if (issuer->host)
 555       label = simgrid::xbt::string_printf("[(%ld)%s] MC_RANDOM (%d)", issuer->pid, MC_smx_actor_get_host_name(issuer),
 556                                           value);
 557     else
 558       label = simgrid::xbt::string_printf("[(%ld)] MC_RANDOM (%d)", issuer->pid, value);
 559     break;
 560
 561   default:
 562     THROW_UNIMPLEMENTED;
 563   }
 564
 565   const char* color = get_color(issuer->pid - 1);
 566   return  simgrid::xbt::string_printf(
 567         "label = \"%s\", color = %s, fontcolor = %s", label.c_str(),
 568         color, color);
 569 }
 570
 571 }
 572 }