1 /* Copyright (c) 2007-2017. 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. */
12 #include <boost/range/algorithm.hpp>
15 #include "xbt/functional.hpp"
17 #include "xbt/sysdep.h"
19 #include "simgrid/s4u/Host.hpp"
23 #include "smx_private.h"
24 #include "src/kernel/activity/SleepImpl.hpp"
25 #include "src/kernel/activity/SynchroIo.hpp"
26 #include "src/kernel/activity/SynchroRaw.hpp"
27 #include "src/mc/mc_replay.h"
28 #include "src/mc/remote/Client.hpp"
29 #include "src/msg/msg_private.h"
30 #include "src/surf/cpu_interface.hpp"
31 #include "src/surf/surf_interface.hpp"
34 #include "src/smpi/include/private.hpp"
37 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(simix_process, simix, "Logging specific to SIMIX (process)");
39 unsigned long simix_process_maxpid = 0;
42 * \brief Returns the current agent.
44 * This functions returns the currently running SIMIX process.
46 * \return The SIMIX process
48 smx_actor_t SIMIX_process_self()
50 smx_context_t self_context = SIMIX_context_self();
52 return (self_context != nullptr) ? self_context->process() : nullptr;
56 * \brief Returns whether a process has pending asynchronous communications.
57 * \return true if there are asynchronous communications in this process
59 int SIMIX_process_has_pending_comms(smx_actor_t process) {
61 return process->comms.size() > 0;
65 * \brief Moves a process to the list of processes to destroy.
67 void SIMIX_process_cleanup(smx_actor_t process)
69 XBT_DEBUG("Cleanup process %s (%p), waiting synchro %p", process->name.c_str(), process,
70 process->waiting_synchro.get());
72 process->finished = true;
73 SIMIX_process_on_exit_runall(process);
75 /* Unregister from the kill timer if any */
76 if (process->kill_timer != nullptr)
77 SIMIX_timer_remove(process->kill_timer);
79 xbt_os_mutex_acquire(simix_global->mutex);
81 /* cancel non-blocking communications */
82 smx_activity_t synchro = process->comms.front();
83 while (not process->comms.empty()) {
84 simgrid::kernel::activity::CommImplPtr comm =
85 boost::static_pointer_cast<simgrid::kernel::activity::CommImpl>(synchro);
87 /* make sure no one will finish the comm after this process is destroyed,
88 * because src_proc or dst_proc would be an invalid pointer */
90 if (comm->src_proc == process) {
91 XBT_DEBUG("Found an unfinished send comm %p (detached = %d), state %d, src = %p, dst = %p", comm.get(),
92 comm->detached, (int)comm->state, comm->src_proc, comm->dst_proc);
93 comm->src_proc = nullptr;
95 } else if (comm->dst_proc == process) {
96 XBT_DEBUG("Found an unfinished recv comm %p, state %d, src = %p, dst = %p", comm.get(), (int)comm->state,
97 comm->src_proc, comm->dst_proc);
98 comm->dst_proc = nullptr;
100 if (comm->detached && comm->src_proc != nullptr) {
101 /* the comm will be freed right now, remove it from the sender */
102 comm->src_proc->comms.remove(comm);
105 xbt_die("Communication synchro %p is in my list but I'm not the sender nor the receiver", synchro.get());
107 process->comms.pop_front();
108 synchro = process->comms.front();
112 XBT_DEBUG("%p should not be run anymore",process);
113 simix_global->process_list.erase(process->pid);
115 xbt_swag_remove(process, process->host->extension<simgrid::simix::Host>()->process_list);
116 xbt_swag_insert(process, simix_global->process_to_destroy);
117 process->context->iwannadie = 0;
119 xbt_os_mutex_release(simix_global->mutex);
125 * Should be called some time to time to free the memory allocated for processes that have finished (or killed).
127 void SIMIX_process_empty_trash()
129 smx_actor_t process = static_cast<smx_actor_t>(xbt_swag_extract(simix_global->process_to_destroy));
132 XBT_DEBUG("Getting rid of %p",process);
133 intrusive_ptr_release(process);
134 process = static_cast<smx_actor_t>(xbt_swag_extract(simix_global->process_to_destroy));
141 ActorImpl::~ActorImpl()
143 delete this->context;
146 static int dying_daemon(void* exit_status, void* data)
148 std::vector<ActorImpl*>* vect = &simix_global->daemons;
150 auto it = std::find(vect->begin(), vect->end(), static_cast<ActorImpl*>(data));
151 xbt_assert(it != vect->end(), "The dying daemon is not a daemon after all. Please report that bug.");
153 /* Don't move the whole content since we don't really care about the order */
154 std::swap(*it, vect->back());
159 /** This process will be terminated automatically when the last non-daemon process finishes */
160 void ActorImpl::daemonize()
164 simix_global->daemons.push_back(this);
165 SIMIX_process_on_exit(this, dying_daemon, this);
169 simgrid::s4u::Actor* ActorImpl::restart()
171 XBT_DEBUG("Restarting process %s on %s", cname(), host->getCname());
173 // retrieve the arguments of the old process
174 // FIXME: Factorize this with SIMIX_host_add_auto_restart_process ?
175 simgrid::simix::ProcessArg arg;
179 arg.kill_time = SIMIX_timer_get_date(kill_timer);
181 arg.properties = nullptr;
182 arg.auto_restart = auto_restart;
184 // kill the old process
185 SIMIX_process_kill(this, (this == simix_global->maestro_process) ? this : SIMIX_process_self());
187 // start the new process
188 ActorImpl* actor = simix_global->create_process_function(arg.name.c_str(), std::move(arg.code), arg.data, arg.host,
189 arg.properties, nullptr);
190 if (arg.kill_time >= 0)
191 simcall_process_set_kill_time(actor, arg.kill_time);
192 if (arg.auto_restart)
193 actor->auto_restart = arg.auto_restart;
195 return actor->ciface();
198 smx_activity_t ActorImpl::suspend(ActorImpl* issuer)
201 XBT_DEBUG("Actor '%s' is already suspended", name.c_str());
207 /* If we are suspending another actor that is waiting on a sync, suspend its synchronization. */
208 if (this != issuer) {
210 waiting_synchro->suspend();
211 /* If the other actor is not waiting, its suspension is delayed to when the actor is rescheduled. */
215 return SIMIX_execution_start(this, "suspend", 0.0, 1.0, 0.0);
219 void ActorImpl::resume()
221 XBT_IN("process = %p", this);
223 if (context->iwannadie) {
224 XBT_VERB("Ignoring request to suspend an actor that is currently dying.");
232 /* resume the synchronization that was blocking the resumed actor. */
234 waiting_synchro->resume();
239 smx_activity_t ActorImpl::sleep(double duration)
242 THROWF(host_error, 0, "Host %s failed, you cannot sleep there.", host->getCname());
244 simgrid::kernel::activity::SleepImpl* synchro = new simgrid::kernel::activity::SleepImpl();
245 synchro->host = host;
246 synchro->surf_sleep = host->pimpl_cpu->sleep(duration);
247 synchro->surf_sleep->setData(synchro);
248 XBT_DEBUG("Create sleep synchronization %p", synchro);
253 void create_maestro(std::function<void()> code)
255 smx_actor_t maestro = nullptr;
256 /* Create maestro process and initialize it */
257 maestro = new simgrid::simix::ActorImpl();
258 maestro->pid = simix_process_maxpid++;
260 maestro->userdata = nullptr;
263 maestro->context = SIMIX_context_new(std::function<void()>(), nullptr, maestro);
265 if (not simix_global)
266 xbt_die("simix is not initialized, please call MSG_init first");
267 maestro->context = simix_global->context_factory->create_maestro(code, maestro);
270 maestro->simcall.issuer = maestro;
271 simix_global->maestro_process = maestro;
277 /** @brief Creates and runs the maestro process */
278 void SIMIX_maestro_create(void (*code)(void*), void* data)
280 simgrid::simix::create_maestro(std::bind(code, data));
284 * \brief Internal function to create a process.
286 * This function actually creates the process.
287 * It may be called when a SIMCALL_PROCESS_CREATE simcall occurs,
288 * or directly for SIMIX internal purposes. The sure thing is that it's called from maestro context.
290 * \return the process created
292 smx_actor_t SIMIX_process_create(const char* name, std::function<void()> code, void* data, simgrid::s4u::Host* host,
293 std::map<std::string, std::string>* properties, smx_actor_t parent_process)
296 XBT_DEBUG("Start process %s on host '%s'", name, host->getCname());
299 XBT_WARN("Cannot launch process '%s' on failed host '%s'", name, host->getCname());
303 smx_actor_t process = new simgrid::simix::ActorImpl();
305 xbt_assert(code && host != nullptr, "Invalid parameters");
307 process->pid = simix_process_maxpid++;
308 process->name = simgrid::xbt::string(name);
309 process->host = host;
310 process->userdata = data;
311 process->simcall.issuer = process;
313 if (parent_process != nullptr) {
314 process->ppid = parent_process->pid;
315 /* SMPI process have their own data segment and each other inherit from their father */
317 if (smpi_privatize_global_variables == SMPI_PRIVATIZE_MMAP) {
318 if (parent_process->pid != 0) {
319 process->segment_index = parent_process->segment_index;
321 process->segment_index = process->pid - 1;
327 process->code = code;
329 XBT_VERB("Create context %s", process->name.c_str());
330 process->context = SIMIX_context_new(std::move(code), simix_global->cleanup_process_function, process);
333 if (properties != nullptr)
334 for (auto kv : *properties)
335 process->setProperty(kv.first, kv.second);
337 /* Make sure that the process is initialized for simix, in case we are called from the Host::onCreation signal */
338 if (host->extension<simgrid::simix::Host>() == nullptr)
339 host->extension_set<simgrid::simix::Host>(new simgrid::simix::Host());
341 /* Add the process to its host process list */
342 xbt_swag_insert(process, host->extension<simgrid::simix::Host>()->process_list);
344 XBT_DEBUG("Start context '%s'", process->name.c_str());
346 /* Now insert it in the global process list and in the process to run list */
347 simix_global->process_list[process->pid] = process;
348 XBT_DEBUG("Inserting %s(%s) in the to_run list", process->cname(), host->getCname());
349 xbt_dynar_push_as(simix_global->process_to_run, smx_actor_t, process);
350 intrusive_ptr_add_ref(process);
352 /* Tracing the process creation */
353 TRACE_msg_process_create(process->cname(), process->pid, process->host);
358 smx_actor_t SIMIX_process_attach(const char* name, void* data, const char* hostname,
359 std::map<std::string, std::string>* properties, smx_actor_t parent_process)
361 // This is mostly a copy/paste from SIMIX_process_new(),
362 // it'd be nice to share some code between those two functions.
364 sg_host_t host = sg_host_by_name(hostname);
365 XBT_DEBUG("Attach process %s on host '%s'", name, hostname);
368 XBT_WARN("Cannot launch process '%s' on failed host '%s'", name, hostname);
372 smx_actor_t process = new simgrid::simix::ActorImpl();
374 process->pid = simix_process_maxpid++;
375 process->name = std::string(name);
376 process->host = host;
377 process->userdata = data;
378 process->simcall.issuer = process;
380 if (parent_process != nullptr) {
381 process->ppid = parent_process->pid;
382 /* SMPI process have their own data segment and each other inherit from their father */
384 if (smpi_privatize_global_variables == SMPI_PRIVATIZE_MMAP) {
385 if (parent_process->pid != 0) {
386 process->segment_index = parent_process->segment_index;
388 process->segment_index = process->pid - 1;
394 /* Process data for auto-restart */
395 process->code = nullptr;
397 XBT_VERB("Create context %s", process->name.c_str());
398 if (not simix_global)
399 xbt_die("simix is not initialized, please call MSG_init first");
400 process->context = simix_global->context_factory->attach(simix_global->cleanup_process_function, process);
403 if (properties != nullptr)
404 for (auto kv : *properties)
405 process->setProperty(kv.first, kv.second);
407 /* Add the process to it's host process list */
408 xbt_swag_insert(process, host->extension<simgrid::simix::Host>()->process_list);
410 /* Now insert it in the global process list and in the process to run list */
411 simix_global->process_list[process->pid] = process;
412 XBT_DEBUG("Inserting %s(%s) in the to_run list", process->cname(), host->getCname());
413 xbt_dynar_push_as(simix_global->process_to_run, smx_actor_t, process);
415 /* Tracing the process creation */
416 TRACE_msg_process_create(process->cname(), process->pid, process->host);
418 auto context = dynamic_cast<simgrid::kernel::context::AttachContext*>(process->context);
420 xbt_die("Not a suitable context");
422 context->attach_start();
426 void SIMIX_process_detach()
428 auto context = dynamic_cast<simgrid::kernel::context::AttachContext*>(SIMIX_context_self());
430 xbt_die("Not a suitable context");
432 simix_global->cleanup_process_function(context->process());
434 // Let maestro ignore we are still alive:
435 // xbt_swag_remove(context->process(), simix_global->process_list);
437 // TODO, Remove from proces list:
438 // xbt_swag_remove(process, sg_host_simix(host)->process_list);
440 context->attach_stop();
445 * \brief Executes the processes from simix_global->process_to_run.
447 * The processes of simix_global->process_to_run are run (in parallel if
448 * possible). On exit, simix_global->process_to_run is empty, and
449 * simix_global->process_that_ran contains the list of processes that just ran.
450 * The two lists are swapped so, be careful when using them before and after a
451 * call to this function.
453 void SIMIX_process_runall()
455 SIMIX_context_runall();
457 xbt_dynar_t tmp = simix_global->process_that_ran;
458 simix_global->process_that_ran = simix_global->process_to_run;
459 simix_global->process_to_run = tmp;
460 xbt_dynar_reset(simix_global->process_to_run);
463 void simcall_HANDLER_process_kill(smx_simcall_t simcall, smx_actor_t process) {
464 SIMIX_process_kill(process, simcall->issuer);
467 * \brief Internal function to kill a SIMIX process.
469 * This function may be called when a SIMCALL_PROCESS_KILL simcall occurs,
470 * or directly for SIMIX internal purposes.
472 * \param process poor victim
473 * \param issuer the process which has sent the PROCESS_KILL. Important to not schedule twice the same process.
475 void SIMIX_process_kill(smx_actor_t process, smx_actor_t issuer) {
477 XBT_DEBUG("Killing process %s@%s", process->cname(), process->host->getCname());
479 process->context->iwannadie = 1;
480 process->blocked = 0;
481 process->suspended = 0;
482 process->exception = nullptr;
484 /* destroy the blocking synchro if any */
485 if (process->waiting_synchro != nullptr) {
487 simgrid::kernel::activity::ExecImplPtr exec =
488 boost::dynamic_pointer_cast<simgrid::kernel::activity::ExecImpl>(process->waiting_synchro);
489 simgrid::kernel::activity::CommImplPtr comm =
490 boost::dynamic_pointer_cast<simgrid::kernel::activity::CommImpl>(process->waiting_synchro);
491 simgrid::kernel::activity::SleepImplPtr sleep =
492 boost::dynamic_pointer_cast<simgrid::kernel::activity::SleepImpl>(process->waiting_synchro);
493 simgrid::kernel::activity::RawImplPtr raw =
494 boost::dynamic_pointer_cast<simgrid::kernel::activity::RawImpl>(process->waiting_synchro);
495 simgrid::kernel::activity::IoImplPtr io =
496 boost::dynamic_pointer_cast<simgrid::kernel::activity::IoImpl>(process->waiting_synchro);
498 if (exec != nullptr) {
500 } else if (comm != nullptr) {
501 process->comms.remove(process->waiting_synchro);
503 // Remove first occurrence of &process->simcall:
504 auto i = boost::range::find(process->waiting_synchro->simcalls, &process->simcall);
505 if (i != process->waiting_synchro->simcalls.end())
506 process->waiting_synchro->simcalls.remove(&process->simcall);
507 } else if (sleep != nullptr) {
508 SIMIX_process_sleep_destroy(process->waiting_synchro);
510 } else if (raw != nullptr) {
511 SIMIX_synchro_stop_waiting(process, &process->simcall);
513 } else if (io != nullptr) {
514 SIMIX_io_destroy(process->waiting_synchro);
516 xbt_die("Unknown type of activity");
520 switch (process->waiting_synchro->type) {
521 case SIMIX_SYNC_JOIN:
522 SIMIX_process_sleep_destroy(process->waiting_synchro);
526 process->waiting_synchro = nullptr;
528 if (not xbt_dynar_member(simix_global->process_to_run, &(process)) && process != issuer) {
529 XBT_DEBUG("Inserting %s in the to_run list", process->name.c_str());
530 xbt_dynar_push_as(simix_global->process_to_run, smx_actor_t, process);
534 /** @brief Ask another process to raise the given exception
536 * @param process The process that should raise that exception
537 * @param cat category of exception
538 * @param value value associated to the exception
539 * @param msg string information associated to the exception
541 void SIMIX_process_throw(smx_actor_t process, xbt_errcat_t cat, int value, const char *msg) {
542 SMX_EXCEPTION(process, cat, value, msg);
544 if (process->suspended)
547 /* cancel the blocking synchro if any */
548 if (process->waiting_synchro) {
550 simgrid::kernel::activity::ExecImplPtr exec =
551 boost::dynamic_pointer_cast<simgrid::kernel::activity::ExecImpl>(process->waiting_synchro);
552 if (exec != nullptr) {
553 SIMIX_execution_cancel(process->waiting_synchro);
556 simgrid::kernel::activity::CommImplPtr comm =
557 boost::dynamic_pointer_cast<simgrid::kernel::activity::CommImpl>(process->waiting_synchro);
558 if (comm != nullptr) {
559 process->comms.remove(comm);
563 simgrid::kernel::activity::SleepImplPtr sleep =
564 boost::dynamic_pointer_cast<simgrid::kernel::activity::SleepImpl>(process->waiting_synchro);
565 if (sleep != nullptr) {
566 SIMIX_process_sleep_destroy(process->waiting_synchro);
567 if (not xbt_dynar_member(simix_global->process_to_run, &(process)) && process != SIMIX_process_self()) {
568 XBT_DEBUG("Inserting %s in the to_run list", process->name.c_str());
569 xbt_dynar_push_as(simix_global->process_to_run, smx_actor_t, process);
573 simgrid::kernel::activity::RawImplPtr raw =
574 boost::dynamic_pointer_cast<simgrid::kernel::activity::RawImpl>(process->waiting_synchro);
575 if (raw != nullptr) {
576 SIMIX_synchro_stop_waiting(process, &process->simcall);
579 simgrid::kernel::activity::IoImplPtr io =
580 boost::dynamic_pointer_cast<simgrid::kernel::activity::IoImpl>(process->waiting_synchro);
582 SIMIX_io_destroy(process->waiting_synchro);
585 process->waiting_synchro = nullptr;
589 void simcall_HANDLER_process_killall(smx_simcall_t simcall, int reset_pid) {
590 SIMIX_process_killall(simcall->issuer, reset_pid);
593 * \brief Kills all running processes.
594 * \param issuer this one will not be killed
596 void SIMIX_process_killall(smx_actor_t issuer, int reset_pid)
598 for (auto kv : simix_global->process_list)
599 if (kv.second != issuer)
600 SIMIX_process_kill(kv.second, issuer);
603 simix_process_maxpid = reset_pid;
605 SIMIX_context_runall();
607 SIMIX_process_empty_trash();
610 void SIMIX_process_change_host(smx_actor_t process, sg_host_t dest)
612 xbt_assert((process != nullptr), "Invalid parameters");
613 xbt_swag_remove(process, process->host->extension<simgrid::simix::Host>()->process_list);
614 process->host = dest;
615 xbt_swag_insert(process, dest->extension<simgrid::simix::Host>()->process_list);
618 void simcall_HANDLER_process_suspend(smx_simcall_t simcall, smx_actor_t process)
620 smx_activity_t sync_suspend = process->suspend(simcall->issuer);
622 if (process != simcall->issuer) {
623 SIMIX_simcall_answer(simcall);
625 sync_suspend->simcalls.push_back(simcall);
626 process->waiting_synchro = sync_suspend;
627 process->waiting_synchro->suspend();
629 /* If we are suspending ourselves, then just do not finish the simcall now */
632 int SIMIX_process_get_maxpid() {
633 return simix_process_maxpid;
636 int SIMIX_process_count()
638 return simix_global->process_list.size();
641 void* SIMIX_process_self_get_data()
643 smx_actor_t self = SIMIX_process_self();
648 return self->getUserData();
651 void SIMIX_process_self_set_data(void *data)
653 SIMIX_process_self()->setUserData(data);
657 /* needs to be public and without simcall because it is called
658 by exceptions and logging events */
659 const char* SIMIX_process_self_get_name() {
661 smx_actor_t process = SIMIX_process_self();
662 if (process == nullptr || process == simix_global->maestro_process)
665 return process->name.c_str();
668 smx_actor_t SIMIX_process_get_by_name(const char* name)
670 for (auto kv : simix_global->process_list)
671 if (kv.second->name == name)
676 void simcall_HANDLER_process_join(smx_simcall_t simcall, smx_actor_t process, double timeout)
678 if (process->finished) {
679 // The joined process is already finished, just wake up the issuer process right away
680 simcall_process_sleep__set__result(simcall, SIMIX_DONE);
681 SIMIX_simcall_answer(simcall);
684 smx_activity_t sync = SIMIX_process_join(simcall->issuer, process, timeout);
685 sync->simcalls.push_back(simcall);
686 simcall->issuer->waiting_synchro = sync;
689 static int SIMIX_process_join_finish(smx_process_exit_status_t status, void* synchro)
691 simgrid::kernel::activity::SleepImpl* sleep = static_cast<simgrid::kernel::activity::SleepImpl*>(synchro);
693 if (sleep->surf_sleep) {
694 sleep->surf_sleep->cancel();
696 while (not sleep->simcalls.empty()) {
697 smx_simcall_t simcall = sleep->simcalls.front();
698 sleep->simcalls.pop_front();
699 simcall_process_sleep__set__result(simcall, SIMIX_DONE);
700 simcall->issuer->waiting_synchro = nullptr;
701 if (simcall->issuer->suspended) {
702 XBT_DEBUG("Wait! This process is suspended and can't wake up now.");
703 simcall->issuer->suspended = 0;
704 simcall_HANDLER_process_suspend(simcall, simcall->issuer);
706 SIMIX_simcall_answer(simcall);
709 sleep->surf_sleep->unref();
710 sleep->surf_sleep = nullptr;
712 // intrusive_ptr_release(process); // FIXME: We are leaking here. See comment in SIMIX_process_join()
716 smx_activity_t SIMIX_process_join(smx_actor_t issuer, smx_actor_t process, double timeout)
718 smx_activity_t res = issuer->sleep(timeout);
719 intrusive_ptr_add_ref(res.get());
720 /* We are leaking the process here, but if we don't take the ref, we get a "use after free".
721 * The correct solution would be to derivate the type SynchroSleep into a SynchroProcessJoin,
722 * but the code is not clean enough for now for this.
723 * The C API should first be properly replaced with the C++ one, which is a fair amount of work.
725 intrusive_ptr_add_ref(process);
726 SIMIX_process_on_exit(process,
727 [](void*, void* arg) {
728 return simgrid::simix::kernelImmediate(
729 [&] { return SIMIX_process_join_finish(SMX_EXIT_SUCCESS, arg); });
735 void simcall_HANDLER_process_sleep(smx_simcall_t simcall, double duration)
737 if (MC_is_active() || MC_record_replay_is_active()) {
738 MC_process_clock_add(simcall->issuer, duration);
739 simcall_process_sleep__set__result(simcall, SIMIX_DONE);
740 SIMIX_simcall_answer(simcall);
743 smx_activity_t sync = simcall->issuer->sleep(duration);
744 sync->simcalls.push_back(simcall);
745 simcall->issuer->waiting_synchro = sync;
748 void SIMIX_process_sleep_destroy(smx_activity_t synchro)
750 XBT_DEBUG("Destroy sleep synchro %p", synchro.get());
751 simgrid::kernel::activity::SleepImplPtr sleep =
752 boost::dynamic_pointer_cast<simgrid::kernel::activity::SleepImpl>(synchro);
754 if (sleep->surf_sleep) {
755 sleep->surf_sleep->unref();
756 sleep->surf_sleep = nullptr;
761 * \brief Calling this function makes the process to yield.
763 * Only the current process can call this function, giving back the control to maestro.
765 * \param self the current process
767 void SIMIX_process_yield(smx_actor_t self)
769 XBT_DEBUG("Yield actor '%s'", self->cname());
771 /* Go into sleep and return control to maestro */
772 self->context->suspend();
774 /* Ok, maestro returned control to us */
775 XBT_DEBUG("Control returned to me: '%s'", self->name.c_str());
777 if (self->new_host) {
778 SIMIX_process_change_host(self, self->new_host);
779 self->new_host = nullptr;
782 if (self->context->iwannadie){
783 XBT_DEBUG("I wanna die!");
784 self->finished = true;
785 /* execute the on_exit functions */
786 SIMIX_process_on_exit_runall(self);
787 /* Add the process to the list of process to restart, only if the host is down */
788 if (self->auto_restart && self->host->isOff()) {
789 SIMIX_host_add_auto_restart_process(self->host, self->cname(), self->code, self->userdata,
790 SIMIX_timer_get_date(self->kill_timer), self->getProperties(),
793 XBT_DEBUG("Process %s@%s is dead", self->cname(), self->host->getCname());
794 self->context->stop();
797 if (self->suspended) {
798 XBT_DEBUG("Hey! I'm suspended.");
799 xbt_assert(self->exception != nullptr, "Gasp! This exception may be lost by subsequent calls.");
804 if (self->exception != nullptr) {
805 XBT_DEBUG("Wait, maestro left me an exception");
806 std::exception_ptr exception = std::move(self->exception);
807 self->exception = nullptr;
808 std::rethrow_exception(std::move(exception));
811 if(SMPI_switch_data_segment && self->segment_index != -1){
812 SMPI_switch_data_segment(self->segment_index);
816 /* callback: termination */
817 void SIMIX_process_exception_terminate(xbt_ex_t * e)
823 /** @brief Returns the list of processes to run. */
824 xbt_dynar_t SIMIX_process_get_runnable()
826 return simix_global->process_to_run;
829 /** @brief Returns the process from PID. */
830 smx_actor_t SIMIX_process_from_PID(aid_t PID)
833 return simix_global->process_list.at(PID);
834 } catch (std::out_of_range& unfound) {
839 /** @brief returns a dynar containing all currently existing processes */
840 xbt_dynar_t SIMIX_processes_as_dynar() {
841 xbt_dynar_t res = xbt_dynar_new(sizeof(smx_actor_t),nullptr);
842 for (auto kv : simix_global->process_list) {
843 smx_actor_t proc = kv.second;
844 xbt_dynar_push(res,&proc);
849 void SIMIX_process_on_exit_runall(smx_actor_t process) {
850 smx_process_exit_status_t exit_status = (process->context->iwannadie) ? SMX_EXIT_FAILURE : SMX_EXIT_SUCCESS;
851 while (not process->on_exit.empty()) {
852 s_smx_process_exit_fun_t exit_fun = process->on_exit.back();
853 (exit_fun.fun)((void*)exit_status, exit_fun.arg);
854 process->on_exit.pop_back();
858 void SIMIX_process_on_exit(smx_actor_t process, int_f_pvoid_pvoid_t fun, void *data) {
859 xbt_assert(process, "current process not found: are you in maestro context ?");
861 s_smx_process_exit_fun_t exit_fun = {fun, data};
863 process->on_exit.push_back(exit_fun);
867 * \brief Sets the auto-restart status of the process.
868 * If set to 1, the process will be automatically restarted when its host comes back.
870 void SIMIX_process_auto_restart_set(smx_actor_t process, int auto_restart) {
871 process->auto_restart = auto_restart;
874 /** @brief Restart a process, starting it again from the beginning. */
876 * \ingroup simix_process_management
877 * \brief Creates and runs a new SIMIX process.
879 * The structure and the corresponding thread are created and put in the list of ready processes.
881 * \param name a name for the process. It is for user-level information and can be nullptr.
882 * \param code the main function of the process
883 * \param data a pointer to any data one may want to attach to the new object. It is for user-level information and can
885 * It can be retrieved with the function \ref simcall_process_get_data.
886 * \param host where the new agent is executed.
887 * \param kill_time time when the process is killed
888 * \param argc first argument passed to \a code
889 * \param argv second argument passed to \a code
890 * \param properties the properties of the process
891 * \param auto_restart either it is autorestarting or not.
893 extern "C" smx_actor_t simcall_process_create(const char* name, xbt_main_func_t code, void* data, sg_host_t host,
894 int argc, char** argv, std::map<std::string, std::string>* properties)
898 auto wrapped_code = simgrid::xbt::wrapMain(code, argc, argv);
899 for (int i = 0; i != argc; ++i)
902 smx_actor_t res = simcall_process_create(name, std::move(wrapped_code), data, host, properties);
906 smx_actor_t simcall_process_create(const char* name, std::function<void()> code, void* data, sg_host_t host,
907 std::map<std::string, std::string>* properties)
911 smx_actor_t self = SIMIX_process_self();
912 return simgrid::simix::kernelImmediate([name, code, data, host, properties, self] {
913 return SIMIX_process_create(name, std::move(code), data, host, properties, self);