1 /* Copyright (c) 2007-2018. The SimGrid Team. All rights reserved. */
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. */
7 #include "simgrid/Exception.hpp"
8 #include "smx_private.hpp"
9 #include "src/kernel/activity/CommImpl.hpp"
10 #include "src/kernel/activity/ExecImpl.hpp"
11 #include "src/kernel/activity/IoImpl.hpp"
12 #include "src/kernel/activity/SleepImpl.hpp"
13 #include "src/kernel/activity/SynchroRaw.hpp"
14 #include "src/mc/mc_replay.hpp"
15 #include "src/mc/remote/Client.hpp"
16 #include "src/simix/smx_host_private.hpp"
17 #include "src/simix/smx_io_private.hpp"
18 #include "src/simix/smx_synchro_private.hpp"
19 #include "src/surf/HostImpl.hpp"
20 #include "src/surf/cpu_interface.hpp"
23 #include "src/smpi/include/private.hpp"
26 #include <boost/range/algorithm.hpp>
28 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(simix_process, simix, "Logging specific to SIMIX (process)");
30 unsigned long simix_process_maxpid = 0;
33 * @brief Returns the current agent.
35 * This functions returns the currently running SIMIX process.
37 * @return The SIMIX process
39 smx_actor_t SIMIX_process_self()
41 smx_context_t self_context = SIMIX_context_self();
43 return (self_context != nullptr) ? self_context->process() : nullptr;
47 * @brief Returns whether a process has pending asynchronous communications.
48 * @return true if there are asynchronous communications in this process
50 int SIMIX_process_has_pending_comms(smx_actor_t process) {
52 return process->comms.size() > 0;
56 * @brief Moves a process to the list of processes to destroy.
58 void SIMIX_process_cleanup(smx_actor_t process)
60 XBT_DEBUG("Cleanup process %s (%p), waiting synchro %p", process->get_cname(), process,
61 process->waiting_synchro.get());
63 process->finished_ = true;
64 SIMIX_process_on_exit_runall(process);
66 /* Unregister from the kill timer if any */
67 if (process->kill_timer != nullptr) {
68 SIMIX_timer_remove(process->kill_timer);
69 process->kill_timer = nullptr;
72 simix_global->mutex.lock();
74 /* cancel non-blocking communications */
75 while (not process->comms.empty()) {
76 smx_activity_t synchro = process->comms.front();
77 process->comms.pop_front();
78 simgrid::kernel::activity::CommImplPtr comm =
79 boost::static_pointer_cast<simgrid::kernel::activity::CommImpl>(synchro);
81 /* make sure no one will finish the comm after this process is destroyed,
82 * because src_proc or dst_proc would be an invalid pointer */
84 if (comm->src_proc == process) {
85 XBT_DEBUG("Found an unfinished send comm %p (detached = %d), state %d, src = %p, dst = %p", comm.get(),
86 comm->detached, (int)comm->state_, comm->src_proc, comm->dst_proc);
87 comm->src_proc = nullptr;
89 } else if (comm->dst_proc == process) {
90 XBT_DEBUG("Found an unfinished recv comm %p, state %d, src = %p, dst = %p", comm.get(), (int)comm->state_,
91 comm->src_proc, comm->dst_proc);
92 comm->dst_proc = nullptr;
94 if (comm->detached && comm->src_proc != nullptr) {
95 /* the comm will be freed right now, remove it from the sender */
96 comm->src_proc->comms.remove(comm);
99 xbt_die("Communication synchro %p is in my list but I'm not the sender nor the receiver", synchro.get());
104 XBT_DEBUG("%s@%s(%ld) should not run anymore", process->get_cname(), process->iface()->get_host()->get_cname(),
106 simix_global->process_list.erase(process->pid_);
107 if (process->host_ && process->host_process_list_hook.is_linked())
108 simgrid::xbt::intrusive_erase(process->host_->pimpl_->process_list_, *process);
109 if (not process->smx_destroy_list_hook.is_linked()) {
111 xbt_dynar_push_as(simix_global->dead_actors_vector, smx_actor_t, process);
113 simix_global->process_to_destroy.push_back(*process);
115 process->context_->iwannadie = false;
117 simix_global->mutex.unlock();
123 * Should be called some time to time to free the memory allocated for processes that have finished (or killed).
125 void SIMIX_process_empty_trash()
127 while (not simix_global->process_to_destroy.empty()) {
128 smx_actor_t process = &simix_global->process_to_destroy.front();
129 simix_global->process_to_destroy.pop_front();
130 XBT_DEBUG("Getting rid of %p",process);
131 intrusive_ptr_release(process);
134 xbt_dynar_reset(simix_global->dead_actors_vector);
143 ActorImpl::~ActorImpl()
145 delete this->context_;
148 static void dying_daemon(int /*exit_status*/, void* data)
150 std::vector<ActorImpl*>* vect = &simix_global->daemons;
152 auto it = std::find(vect->begin(), vect->end(), static_cast<ActorImpl*>(data));
153 xbt_assert(it != vect->end(), "The dying daemon is not a daemon after all. Please report that bug.");
155 /* Don't move the whole content since we don't really care about the order */
156 std::swap(*it, vect->back());
160 /** This process will be terminated automatically when the last non-daemon process finishes */
161 void ActorImpl::daemonize()
165 simix_global->daemons.push_back(this);
166 SIMIX_process_on_exit(this, dying_daemon, this);
170 simgrid::s4u::Actor* ActorImpl::restart()
172 XBT_DEBUG("Restarting process %s on %s", get_cname(), host_->get_cname());
174 // retrieve the arguments of the old process
175 simgrid::kernel::actor::ProcessArg arg = ProcessArg(host_, this);
177 // kill the old process
178 SIMIX_process_kill(this, (this == simix_global->maestro_process) ? this : SIMIX_process_self());
180 // start the new process
181 ActorImpl* actor = simix_global->create_process_function(arg.name.c_str(), std::move(arg.code), arg.data, arg.host,
182 arg.properties.get(), nullptr);
183 simcall_process_set_kill_time(actor, arg.kill_time);
184 actor->set_auto_restart(arg.auto_restart);
186 return actor->ciface();
189 smx_activity_t ActorImpl::suspend(ActorImpl* issuer)
192 XBT_DEBUG("Actor '%s' is already suspended", get_cname());
198 /* If we are suspending another actor that is waiting on a sync, suspend its synchronization. */
199 if (this != issuer) {
201 waiting_synchro->suspend();
202 /* If the other actor is not waiting, its suspension is delayed to when the actor is rescheduled. */
206 return SIMIX_execution_start("suspend", "", 0.0, 1.0, 0.0, this->host_);
210 void ActorImpl::resume()
212 XBT_IN("process = %p", this);
214 if (context_->iwannadie) {
215 XBT_VERB("Ignoring request to suspend an actor that is currently dying.");
223 /* resume the synchronization that was blocking the resumed actor. */
225 waiting_synchro->resume();
230 smx_activity_t ActorImpl::sleep(double duration)
233 throw_exception(std::make_exception_ptr(simgrid::HostFailureException(
234 XBT_THROW_POINT, std::string("Host ") + std::string(host_->get_cname()) + " failed, you cannot sleep there.")));
236 simgrid::kernel::activity::SleepImpl* synchro = new simgrid::kernel::activity::SleepImpl();
237 synchro->host = host_;
238 synchro->surf_sleep = host_->pimpl_cpu->sleep(duration);
239 synchro->surf_sleep->set_data(synchro);
240 XBT_DEBUG("Create sleep synchronization %p", synchro);
245 void ActorImpl::throw_exception(std::exception_ptr e)
252 /* cancel the blocking synchro if any */
253 if (waiting_synchro) {
255 simgrid::kernel::activity::ExecImplPtr exec =
256 boost::dynamic_pointer_cast<simgrid::kernel::activity::ExecImpl>(waiting_synchro);
257 if (exec != nullptr && exec->surf_action_)
258 exec->surf_action_->cancel();
260 simgrid::kernel::activity::CommImplPtr comm =
261 boost::dynamic_pointer_cast<simgrid::kernel::activity::CommImpl>(waiting_synchro);
262 if (comm != nullptr) {
267 simgrid::kernel::activity::SleepImplPtr sleep =
268 boost::dynamic_pointer_cast<simgrid::kernel::activity::SleepImpl>(waiting_synchro);
269 if (sleep != nullptr) {
270 SIMIX_process_sleep_destroy(waiting_synchro);
271 if (std::find(begin(simix_global->process_to_run), end(simix_global->process_to_run), this) ==
272 end(simix_global->process_to_run) &&
273 this != SIMIX_process_self()) {
274 XBT_DEBUG("Inserting %s in the to_run list", get_cname());
275 simix_global->process_to_run.push_back(this);
279 simgrid::kernel::activity::RawImplPtr raw =
280 boost::dynamic_pointer_cast<simgrid::kernel::activity::RawImpl>(waiting_synchro);
281 if (raw != nullptr) {
282 SIMIX_synchro_stop_waiting(this, &simcall);
285 simgrid::kernel::activity::IoImplPtr io =
286 boost::dynamic_pointer_cast<simgrid::kernel::activity::IoImpl>(waiting_synchro);
291 waiting_synchro = nullptr;
294 void create_maestro(simgrid::simix::ActorCode code)
296 smx_actor_t maestro = nullptr;
297 /* Create maestro process and initialize it */
298 maestro = new simgrid::kernel::actor::ActorImpl();
299 maestro->pid_ = simix_process_maxpid++;
301 maestro->set_user_data(nullptr);
304 maestro->context_ = SIMIX_context_new(simgrid::simix::ActorCode(), nullptr, maestro);
306 if (not simix_global)
307 xbt_die("simix is not initialized, please call MSG_init first");
308 maestro->context_ = simix_global->context_factory->create_maestro(code, maestro);
311 maestro->simcall.issuer = maestro;
312 simix_global->maestro_process = maestro;
319 /** @brief Creates and runs the maestro process */
320 void SIMIX_maestro_create(void (*code)(void*), void* data)
322 simgrid::kernel::actor::create_maestro(std::bind(code, data));
326 * @brief Internal function to create a process.
328 * This function actually creates the process.
329 * It may be called when a SIMCALL_PROCESS_CREATE simcall occurs,
330 * or directly for SIMIX internal purposes. The sure thing is that it's called from maestro context.
332 * @return the process created
334 smx_actor_t SIMIX_process_create(std::string name, simgrid::simix::ActorCode code, void* data, simgrid::s4u::Host* host,
335 std::unordered_map<std::string, std::string>* properties, smx_actor_t parent_process)
338 XBT_DEBUG("Start process %s on host '%s'", name.c_str(), host->get_cname());
340 if (host->is_off()) {
341 XBT_WARN("Cannot launch process '%s' on failed host '%s'", name.c_str(), host->get_cname());
345 smx_actor_t process = new simgrid::kernel::actor::ActorImpl();
347 xbt_assert(code && host != nullptr, "Invalid parameters");
349 process->pid_ = simix_process_maxpid++;
350 process->name_ = simgrid::xbt::string(name);
351 process->host_ = host;
352 process->set_user_data(data);
353 process->simcall.issuer = process;
355 if (parent_process != nullptr) {
356 process->ppid_ = parent_process->pid_;
359 process->code = code;
361 XBT_VERB("Create context %s", process->get_cname());
362 process->context_ = SIMIX_context_new(std::move(code), simix_global->cleanup_process_function, process);
365 if (properties != nullptr)
366 for (auto const& kv : *properties)
367 process->set_property(kv.first, kv.second);
369 /* Add the process to its host's process list */
370 host->pimpl_->process_list_.push_back(*process);
372 XBT_DEBUG("Start context '%s'", process->get_cname());
374 /* Now insert it in the global process list and in the process to run list */
375 simix_global->process_list[process->pid_] = process;
376 XBT_DEBUG("Inserting %s(%s) in the to_run list", process->get_cname(), host->get_cname());
377 simix_global->process_to_run.push_back(process);
378 intrusive_ptr_add_ref(process);
380 /* The onCreation() signal must be delayed until there, where the pid and everything is set */
381 simgrid::s4u::ActorPtr tmp = process->iface(); // Passing this directly to onCreation will lead to crashes
382 simgrid::s4u::Actor::on_creation(tmp);
387 smx_actor_t SIMIX_process_attach(const char* name, void* data, const char* hostname,
388 std::unordered_map<std::string, std::string>* properties, smx_actor_t parent_process)
390 // This is mostly a copy/paste from SIMIX_process_new(),
391 // it'd be nice to share some code between those two functions.
393 sg_host_t host = sg_host_by_name(hostname);
394 XBT_DEBUG("Attach process %s on host '%s'", name, hostname);
396 if (host->is_off()) {
397 XBT_WARN("Cannot launch process '%s' on failed host '%s'", name, hostname);
401 smx_actor_t process = new simgrid::kernel::actor::ActorImpl();
403 process->pid_ = simix_process_maxpid++;
404 process->name_ = std::string(name);
405 process->host_ = host;
406 process->set_user_data(data);
407 process->simcall.issuer = process;
409 if (parent_process != nullptr) {
410 process->ppid_ = parent_process->pid_;
413 /* Process data for auto-restart */
414 process->code = nullptr;
416 XBT_VERB("Create context %s", process->get_cname());
417 if (not simix_global)
418 xbt_die("simix is not initialized, please call MSG_init first");
419 process->context_ = simix_global->context_factory->attach(simix_global->cleanup_process_function, process);
422 if (properties != nullptr)
423 for (auto const& kv : *properties)
424 process->set_property(kv.first, kv.second);
426 /* Add the process to it's host process list */
427 host->pimpl_->process_list_.push_back(*process);
429 /* Now insert it in the global process list and in the process to run list */
430 simix_global->process_list[process->pid_] = process;
431 XBT_DEBUG("Inserting %s(%s) in the to_run list", process->get_cname(), host->get_cname());
432 simix_global->process_to_run.push_back(process);
433 intrusive_ptr_add_ref(process);
435 auto* context = dynamic_cast<simgrid::kernel::context::AttachContext*>(process->context_);
437 xbt_die("Not a suitable context");
439 context->attach_start();
441 /* The onCreation() signal must be delayed until there, where the pid and everything is set */
442 simgrid::s4u::ActorPtr tmp = process->iface(); // Passing this directly to onCreation will lead to crashes
443 simgrid::s4u::Actor::on_creation(tmp);
448 void SIMIX_process_detach()
450 auto* context = dynamic_cast<simgrid::kernel::context::AttachContext*>(SIMIX_context_self());
452 xbt_die("Not a suitable context");
454 auto process = context->process();
455 simix_global->cleanup_process_function(process);
456 context->attach_stop();
460 * @brief Executes the processes from simix_global->process_to_run.
462 * The processes of simix_global->process_to_run are run (in parallel if
463 * possible). On exit, simix_global->process_to_run is empty, and
464 * simix_global->process_that_ran contains the list of processes that just ran.
465 * The two lists are swapped so, be careful when using them before and after a
466 * call to this function.
468 void SIMIX_process_runall()
470 SIMIX_context_runall();
472 simix_global->process_to_run.swap(simix_global->process_that_ran);
473 simix_global->process_to_run.clear();
477 * @brief Internal function to kill a SIMIX process.
479 * This function may be called when a SIMCALL_PROCESS_KILL simcall occurs,
480 * or directly for SIMIX internal purposes.
482 * @param process poor victim
483 * @param issuer the process which has sent the PROCESS_KILL. Important to not schedule twice the same process.
485 void SIMIX_process_kill(smx_actor_t process, smx_actor_t issuer) {
487 if (process->finished_) {
488 XBT_DEBUG("Ignoring request to kill process %s@%s that is already dead", process->get_cname(),
489 process->host_->get_cname());
493 XBT_DEBUG("Actor '%s'@%s is killing actor '%s'@%s", issuer->get_cname(),
494 (issuer->host_ == nullptr ? "(null)" : issuer->host_->get_cname()), process->get_cname(),
495 process->host_->get_cname());
497 process->context_->iwannadie = true;
498 process->blocked_ = false;
499 process->suspended_ = false;
500 process->exception = nullptr;
502 if (process->host_->is_off())
503 process->throw_exception(std::make_exception_ptr(simgrid::HostFailureException(XBT_THROW_POINT, "Host failed")));
505 /* destroy the blocking synchro if any */
506 if (process->waiting_synchro != nullptr) {
508 simgrid::kernel::activity::ExecImplPtr exec =
509 boost::dynamic_pointer_cast<simgrid::kernel::activity::ExecImpl>(process->waiting_synchro);
510 simgrid::kernel::activity::CommImplPtr comm =
511 boost::dynamic_pointer_cast<simgrid::kernel::activity::CommImpl>(process->waiting_synchro);
512 simgrid::kernel::activity::SleepImplPtr sleep =
513 boost::dynamic_pointer_cast<simgrid::kernel::activity::SleepImpl>(process->waiting_synchro);
514 simgrid::kernel::activity::RawImplPtr raw =
515 boost::dynamic_pointer_cast<simgrid::kernel::activity::RawImpl>(process->waiting_synchro);
516 simgrid::kernel::activity::IoImplPtr io =
517 boost::dynamic_pointer_cast<simgrid::kernel::activity::IoImpl>(process->waiting_synchro);
519 if (exec != nullptr) {
520 if (exec->surf_action_) {
521 exec->surf_action_->cancel();
522 exec->surf_action_->unref();
523 exec->surf_action_ = nullptr;
525 } else if (comm != nullptr) {
526 process->comms.remove(process->waiting_synchro);
528 // Remove first occurrence of &process->simcall:
529 auto i = boost::range::find(process->waiting_synchro->simcalls_, &process->simcall);
530 if (i != process->waiting_synchro->simcalls_.end())
531 process->waiting_synchro->simcalls_.remove(&process->simcall);
532 } else if (sleep != nullptr) {
533 if (sleep->surf_sleep)
534 sleep->surf_sleep->cancel();
536 } else if (raw != nullptr) {
537 SIMIX_synchro_stop_waiting(process, &process->simcall);
539 } else if (io != nullptr) {
542 simgrid::kernel::activity::ActivityImplPtr activity = process->waiting_synchro;
543 xbt_die("Activity %s is of unknown type %s", activity->name_.c_str(),
544 simgrid::xbt::demangle(typeid(activity).name()).get());
547 process->waiting_synchro = nullptr;
549 if (std::find(begin(simix_global->process_to_run), end(simix_global->process_to_run), process) ==
550 end(simix_global->process_to_run) &&
552 XBT_DEBUG("Inserting %s in the to_run list", process->get_cname());
553 simix_global->process_to_run.push_back(process);
557 /** @deprecated When this function gets removed, also remove the xbt_ex class, that is only there to help users to
559 void SIMIX_process_throw(smx_actor_t process, xbt_errcat_t cat, int value, const char *msg) {
560 SMX_EXCEPTION(process, cat, value, msg);
562 if (process->suspended_)
565 /* cancel the blocking synchro if any */
566 if (process->waiting_synchro) {
568 simgrid::kernel::activity::ExecImplPtr exec =
569 boost::dynamic_pointer_cast<simgrid::kernel::activity::ExecImpl>(process->waiting_synchro);
570 if (exec != nullptr && exec->surf_action_)
571 exec->surf_action_->cancel();
573 simgrid::kernel::activity::CommImplPtr comm =
574 boost::dynamic_pointer_cast<simgrid::kernel::activity::CommImpl>(process->waiting_synchro);
575 if (comm != nullptr) {
576 process->comms.remove(comm);
580 simgrid::kernel::activity::SleepImplPtr sleep =
581 boost::dynamic_pointer_cast<simgrid::kernel::activity::SleepImpl>(process->waiting_synchro);
582 if (sleep != nullptr) {
583 SIMIX_process_sleep_destroy(process->waiting_synchro);
584 if (std::find(begin(simix_global->process_to_run), end(simix_global->process_to_run), process) ==
585 end(simix_global->process_to_run) &&
586 process != SIMIX_process_self()) {
587 XBT_DEBUG("Inserting %s in the to_run list", process->get_cname());
588 simix_global->process_to_run.push_back(process);
592 simgrid::kernel::activity::RawImplPtr raw =
593 boost::dynamic_pointer_cast<simgrid::kernel::activity::RawImpl>(process->waiting_synchro);
594 if (raw != nullptr) {
595 SIMIX_synchro_stop_waiting(process, &process->simcall);
598 simgrid::kernel::activity::IoImplPtr io =
599 boost::dynamic_pointer_cast<simgrid::kernel::activity::IoImpl>(process->waiting_synchro);
604 process->waiting_synchro = nullptr;
609 * @brief Kills all running processes.
610 * @param issuer this one will not be killed
612 void SIMIX_process_killall(smx_actor_t issuer)
614 for (auto const& kv : simix_global->process_list)
615 if (kv.second != issuer)
616 SIMIX_process_kill(kv.second, issuer);
619 void SIMIX_process_change_host(smx_actor_t actor, sg_host_t dest)
621 xbt_assert((actor != nullptr), "Invalid parameters");
622 simgrid::xbt::intrusive_erase(actor->host_->pimpl_->process_list_, *actor);
624 dest->pimpl_->process_list_.push_back(*actor);
627 void simcall_HANDLER_process_suspend(smx_simcall_t simcall, smx_actor_t process)
629 smx_activity_t sync_suspend = process->suspend(simcall->issuer);
631 if (process != simcall->issuer) {
632 SIMIX_simcall_answer(simcall);
634 sync_suspend->simcalls_.push_back(simcall);
635 process->waiting_synchro = sync_suspend;
636 process->waiting_synchro->suspend();
638 /* If we are suspending ourselves, then just do not finish the simcall now */
641 int SIMIX_process_get_maxpid() {
642 return simix_process_maxpid;
645 int SIMIX_process_count()
647 return simix_global->process_list.size();
650 void* SIMIX_process_self_get_data()
652 smx_actor_t self = SIMIX_process_self();
657 return self->get_user_data();
660 void SIMIX_process_self_set_data(void *data)
662 SIMIX_process_self()->set_user_data(data);
666 /* needs to be public and without simcall because it is called
667 by exceptions and logging events */
668 const char* SIMIX_process_self_get_name() {
670 smx_actor_t process = SIMIX_process_self();
671 if (process == nullptr || process == simix_global->maestro_process)
674 return process->get_cname();
677 void simcall_HANDLER_process_join(smx_simcall_t simcall, smx_actor_t process, double timeout)
679 if (process->finished_) {
680 // The joined process is already finished, just wake up the issuer process right away
681 simcall_process_sleep__set__result(simcall, SIMIX_DONE);
682 SIMIX_simcall_answer(simcall);
685 smx_activity_t sync = SIMIX_process_join(simcall->issuer, process, timeout);
686 sync->simcalls_.push_back(simcall);
687 simcall->issuer->waiting_synchro = sync;
690 smx_activity_t SIMIX_process_join(smx_actor_t issuer, smx_actor_t process, double timeout)
692 smx_activity_t res = issuer->sleep(timeout);
693 intrusive_ptr_add_ref(res.get());
694 SIMIX_process_on_exit(process,
696 auto sleep = static_cast<simgrid::kernel::activity::SleepImpl*>(arg);
697 if (sleep->surf_sleep)
698 sleep->surf_sleep->finish(simgrid::kernel::resource::Action::State::FINISHED);
699 intrusive_ptr_release(sleep);
705 void simcall_HANDLER_process_sleep(smx_simcall_t simcall, double duration)
707 if (MC_is_active() || MC_record_replay_is_active()) {
708 MC_process_clock_add(simcall->issuer, duration);
709 simcall_process_sleep__set__result(simcall, SIMIX_DONE);
710 SIMIX_simcall_answer(simcall);
713 smx_activity_t sync = simcall->issuer->sleep(duration);
714 sync->simcalls_.push_back(simcall);
715 simcall->issuer->waiting_synchro = sync;
718 void SIMIX_process_sleep_destroy(smx_activity_t synchro)
720 XBT_DEBUG("Destroy sleep synchro %p", synchro.get());
721 simgrid::kernel::activity::SleepImplPtr sleep =
722 boost::dynamic_pointer_cast<simgrid::kernel::activity::SleepImpl>(synchro);
724 if (sleep->surf_sleep) {
725 sleep->surf_sleep->unref();
726 sleep->surf_sleep = nullptr;
731 * @brief Calling this function makes the process to yield.
733 * Only the current process can call this function, giving back the control to maestro.
735 * @param self the current process
737 void SIMIX_process_yield(smx_actor_t self)
739 XBT_DEBUG("Yield actor '%s'", self->get_cname());
741 /* Go into sleep and return control to maestro */
742 self->context_->suspend();
744 /* Ok, maestro returned control to us */
745 XBT_DEBUG("Control returned to me: '%s'", self->get_cname());
747 if (self->context_->iwannadie) {
748 XBT_DEBUG("I wanna die!");
749 self->finished_ = true;
750 /* execute the on_exit functions */
751 SIMIX_process_on_exit_runall(self);
753 if (self->auto_restart_ && self->host_->is_off() &&
754 watched_hosts.find(self->host_->get_cname()) == watched_hosts.end()) {
755 XBT_DEBUG("Push host %s to watched_hosts because it's off and %s needs to restart", self->host_->get_cname(),
757 watched_hosts.insert(self->host_->get_cname());
760 XBT_DEBUG("Process %s@%s is dead", self->get_cname(), self->host_->get_cname());
761 self->context_->stop();
762 xbt_die("I should be dead by now.");
765 if (self->suspended_) {
766 XBT_DEBUG("Hey! I'm suspended.");
767 xbt_assert(self->exception != nullptr, "Gasp! This exception may be lost by subsequent calls.");
768 self->suspended_ = false;
772 if (self->exception != nullptr) {
773 XBT_DEBUG("Wait, maestro left me an exception");
774 std::exception_ptr exception = std::move(self->exception);
775 self->exception = nullptr;
776 std::rethrow_exception(std::move(exception));
779 if (SMPI_switch_data_segment && not self->finished_) {
780 SMPI_switch_data_segment(self->iface());
784 /** @brief Returns the list of processes to run. */
785 const std::vector<smx_actor_t>& simgrid::simix::process_get_runnable()
787 return simix_global->process_to_run;
790 /** @brief Returns the process from PID. */
791 smx_actor_t SIMIX_process_from_PID(aid_t PID)
793 auto process = simix_global->process_list.find(PID);
794 return process == simix_global->process_list.end() ? nullptr : process->second;
797 void SIMIX_process_on_exit_runall(smx_actor_t process) {
798 simgrid::s4u::Actor::on_destruction(process->iface());
799 smx_process_exit_status_t exit_status = (process->context_->iwannadie) ? SMX_EXIT_FAILURE : SMX_EXIT_SUCCESS;
800 while (not process->on_exit.empty()) {
801 s_smx_process_exit_fun_t exit_fun = process->on_exit.back();
802 process->on_exit.pop_back();
803 (exit_fun.fun)(exit_status, exit_fun.arg);
807 void SIMIX_process_on_exit(smx_actor_t process, int_f_pvoid_pvoid_t fun, void* data)
809 SIMIX_process_on_exit(process, [fun](int a, void* b) { fun((void*)(intptr_t)a, b); }, data);
812 void SIMIX_process_on_exit(smx_actor_t process, std::function<void(int, void*)> fun, void* data)
814 xbt_assert(process, "current process not found: are you in maestro context ?");
816 process->on_exit.emplace_back(s_smx_process_exit_fun_t{fun, data});
819 /** @brief Restart a process, starting it again from the beginning. */
821 * @ingroup simix_process_management
822 * @brief Creates and runs a new SIMIX process.
824 * The structure and the corresponding thread are created and put in the list of ready processes.
826 * @param name a name for the process. It is for user-level information and can be nullptr.
827 * @param code the main function of the process
828 * @param data a pointer to any data one may want to attach to the new object. It is for user-level information and can
830 * It can be retrieved with the method ActorImpl::getUserData().
831 * @param host where the new agent is executed.
832 * @param argc first argument passed to @a code
833 * @param argv second argument passed to @a code
834 * @param properties the properties of the process
836 smx_actor_t simcall_process_create(std::string name, xbt_main_func_t code, void* data, sg_host_t host, int argc,
837 char** argv, std::unordered_map<std::string, std::string>* properties)
839 auto wrapped_code = simgrid::xbt::wrap_main(code, argc, argv);
840 for (int i = 0; i != argc; ++i)
843 smx_actor_t res = simcall_process_create(name, std::move(wrapped_code), data, host, properties);
847 smx_actor_t simcall_process_create(std::string name, simgrid::simix::ActorCode code, void* data, sg_host_t host,
848 std::unordered_map<std::string, std::string>* properties)
850 smx_actor_t self = SIMIX_process_self();
851 return simgrid::simix::simcall([name, code, data, host, properties, self] {
852 return SIMIX_process_create(name, std::move(code), data, host, properties, self);