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. */
11 #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/private.h"
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;
144 xbt_dict_free(&this->properties);
147 static int dying_daemon(void* exit_status, void* data)
149 std::vector<ActorImpl*>* vect = &simix_global->daemons;
151 auto it = std::find(vect->begin(), vect->end(), static_cast<ActorImpl*>(data));
152 xbt_assert(it != vect->end(), "The dying daemon is not a daemon after all. Please report that bug.");
154 /* Don't move the whole content since we don't really care about the order */
155 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 /** Whether this process is daemonized */
171 bool ActorImpl::isDaemon()
176 void create_maestro(std::function<void()> code)
178 smx_actor_t maestro = nullptr;
179 /* Create maestro process and initialize it */
180 maestro = new simgrid::simix::ActorImpl();
181 maestro->pid = simix_process_maxpid++;
183 maestro->data = nullptr;
186 maestro->context = SIMIX_context_new(std::function<void()>(), nullptr, maestro);
188 if (not simix_global)
189 xbt_die("simix is not initialized, please call MSG_init first");
191 simix_global->context_factory->create_maestro(code, maestro);
194 maestro->simcall.issuer = maestro;
195 simix_global->maestro_process = maestro;
201 /** @brief Creates and runs the maestro process */
202 void SIMIX_maestro_create(void (*code)(void*), void* data)
204 simgrid::simix::create_maestro(std::bind(code, data));
208 * \brief Internal function to create a process.
210 * This function actually creates the process.
211 * It may be called when a SIMCALL_PROCESS_CREATE simcall occurs,
212 * or directly for SIMIX internal purposes. The sure thing is that it's called from maestro context.
214 * \return the process created
216 smx_actor_t SIMIX_process_create(const char* name, std::function<void()> code, void* data, simgrid::s4u::Host* host,
217 xbt_dict_t properties, smx_actor_t parent_process)
220 XBT_DEBUG("Start process %s on host '%s'", name, host->cname());
223 XBT_WARN("Cannot launch process '%s' on failed host '%s'", name, host->cname());
227 smx_actor_t process = new simgrid::simix::ActorImpl();
229 xbt_assert(code && host != nullptr, "Invalid parameters");
231 process->pid = simix_process_maxpid++;
232 process->name = simgrid::xbt::string(name);
233 process->host = host;
234 process->data = data;
235 process->simcall.issuer = process;
237 if (parent_process != nullptr) {
238 process->ppid = parent_process->pid;
239 /* SMPI process have their own data segment and each other inherit from their father */
241 if (smpi_privatize_global_variables == SMPI_PRIVATIZE_MMAP) {
242 if (parent_process->pid != 0) {
243 SIMIX_segment_index_set(process, parent_process->segment_index);
245 SIMIX_segment_index_set(process, process->pid - 1);
251 process->code = code;
253 XBT_VERB("Create context %s", process->name.c_str());
254 process->context = SIMIX_context_new(std::move(code), simix_global->cleanup_process_function, process);
257 process->properties = properties;
259 /* Make sure that the process is initialized for simix, in case we are called from the Host::onCreation signal */
260 if (host->extension<simgrid::simix::Host>() == nullptr)
261 host->extension_set<simgrid::simix::Host>(new simgrid::simix::Host());
263 /* Add the process to its host process list */
264 xbt_swag_insert(process, host->extension<simgrid::simix::Host>()->process_list);
266 XBT_DEBUG("Start context '%s'", process->name.c_str());
268 /* Now insert it in the global process list and in the process to run list */
269 simix_global->process_list[process->pid] = process;
270 XBT_DEBUG("Inserting %s(%s) in the to_run list", process->cname(), host->cname());
271 xbt_dynar_push_as(simix_global->process_to_run, smx_actor_t, process);
272 intrusive_ptr_add_ref(process);
274 /* Tracing the process creation */
275 TRACE_msg_process_create(process->cname(), process->pid, process->host);
280 smx_actor_t SIMIX_process_attach(const char* name, void* data, const char* hostname, xbt_dict_t properties,
281 smx_actor_t parent_process)
283 // This is mostly a copy/paste from SIMIX_process_new(),
284 // it'd be nice to share some code between those two functions.
286 sg_host_t host = sg_host_by_name(hostname);
287 XBT_DEBUG("Attach process %s on host '%s'", name, hostname);
290 XBT_WARN("Cannot launch process '%s' on failed host '%s'",
295 smx_actor_t process = new simgrid::simix::ActorImpl();
297 process->pid = simix_process_maxpid++;
298 process->name = std::string(name);
299 process->host = host;
300 process->data = data;
301 process->simcall.issuer = process;
303 if (parent_process != nullptr) {
304 process->ppid = parent_process->pid;
305 /* SMPI process have their own data segment and each other inherit from their father */
307 if (smpi_privatize_global_variables == SMPI_PRIVATIZE_MMAP) {
308 if (parent_process->pid != 0) {
309 SIMIX_segment_index_set(process, parent_process->segment_index);
311 SIMIX_segment_index_set(process, process->pid - 1);
317 /* Process data for auto-restart */
318 process->code = nullptr;
320 XBT_VERB("Create context %s", process->name.c_str());
321 if (not simix_global)
322 xbt_die("simix is not initialized, please call MSG_init first");
323 process->context = simix_global->context_factory->attach(
324 simix_global->cleanup_process_function, process);
327 process->properties = properties;
329 /* Add the process to it's host process list */
330 xbt_swag_insert(process, host->extension<simgrid::simix::Host>()->process_list);
332 /* Now insert it in the global process list and in the process to run list */
333 simix_global->process_list[process->pid] = process;
334 XBT_DEBUG("Inserting %s(%s) in the to_run list", process->cname(), host->cname());
335 xbt_dynar_push_as(simix_global->process_to_run, smx_actor_t, process);
337 /* Tracing the process creation */
338 TRACE_msg_process_create(process->cname(), process->pid, process->host);
340 auto context = dynamic_cast<simgrid::kernel::context::AttachContext*>(process->context);
342 xbt_die("Not a suitable context");
344 context->attach_start();
348 void SIMIX_process_detach()
350 auto context = dynamic_cast<simgrid::kernel::context::AttachContext*>(SIMIX_context_self());
352 xbt_die("Not a suitable context");
354 simix_global->cleanup_process_function(context->process());
356 // Let maestro ignore we are still alive:
357 // xbt_swag_remove(context->process(), simix_global->process_list);
359 // TODO, Remove from proces list:
360 // xbt_swag_remove(process, sg_host_simix(host)->process_list);
362 context->attach_stop();
367 * \brief Executes the processes from simix_global->process_to_run.
369 * The processes of simix_global->process_to_run are run (in parallel if
370 * possible). On exit, simix_global->process_to_run is empty, and
371 * simix_global->process_that_ran contains the list of processes that just ran.
372 * The two lists are swapped so, be careful when using them before and after a
373 * call to this function.
375 void SIMIX_process_runall()
377 SIMIX_context_runall();
379 xbt_dynar_t tmp = simix_global->process_that_ran;
380 simix_global->process_that_ran = simix_global->process_to_run;
381 simix_global->process_to_run = tmp;
382 xbt_dynar_reset(simix_global->process_to_run);
385 void simcall_HANDLER_process_kill(smx_simcall_t simcall, smx_actor_t process) {
386 SIMIX_process_kill(process, simcall->issuer);
389 * \brief Internal function to kill a SIMIX process.
391 * This function may be called when a SIMCALL_PROCESS_KILL simcall occurs,
392 * or directly for SIMIX internal purposes.
394 * \param process poor victim
395 * \param issuer the process which has sent the PROCESS_KILL. Important to not schedule twice the same process.
397 void SIMIX_process_kill(smx_actor_t process, smx_actor_t issuer) {
399 XBT_DEBUG("Killing process %s@%s", process->cname(), process->host->cname());
401 process->context->iwannadie = 1;
402 process->blocked = 0;
403 process->suspended = 0;
404 process->exception = nullptr;
406 /* destroy the blocking synchro if any */
407 if (process->waiting_synchro != nullptr) {
409 simgrid::kernel::activity::ExecImplPtr exec =
410 boost::dynamic_pointer_cast<simgrid::kernel::activity::ExecImpl>(process->waiting_synchro);
411 simgrid::kernel::activity::CommImplPtr comm =
412 boost::dynamic_pointer_cast<simgrid::kernel::activity::CommImpl>(process->waiting_synchro);
413 simgrid::kernel::activity::SleepImplPtr sleep =
414 boost::dynamic_pointer_cast<simgrid::kernel::activity::SleepImpl>(process->waiting_synchro);
415 simgrid::kernel::activity::RawImplPtr raw =
416 boost::dynamic_pointer_cast<simgrid::kernel::activity::RawImpl>(process->waiting_synchro);
417 simgrid::kernel::activity::IoImplPtr io =
418 boost::dynamic_pointer_cast<simgrid::kernel::activity::IoImpl>(process->waiting_synchro);
420 if (exec != nullptr) {
422 } else if (comm != nullptr) {
423 process->comms.remove(process->waiting_synchro);
425 // Remove first occurrence of &process->simcall:
426 auto i = boost::range::find(process->waiting_synchro->simcalls, &process->simcall);
427 if (i != process->waiting_synchro->simcalls.end())
428 process->waiting_synchro->simcalls.remove(&process->simcall);
429 } else if (sleep != nullptr) {
430 SIMIX_process_sleep_destroy(process->waiting_synchro);
432 } else if (raw != nullptr) {
433 SIMIX_synchro_stop_waiting(process, &process->simcall);
435 } else if (io != nullptr) {
436 SIMIX_io_destroy(process->waiting_synchro);
438 xbt_die("Unknown type of activity");
442 switch (process->waiting_synchro->type) {
443 case SIMIX_SYNC_JOIN:
444 SIMIX_process_sleep_destroy(process->waiting_synchro);
448 process->waiting_synchro = nullptr;
450 if (not xbt_dynar_member(simix_global->process_to_run, &(process)) && process != issuer) {
451 XBT_DEBUG("Inserting %s in the to_run list", process->name.c_str());
452 xbt_dynar_push_as(simix_global->process_to_run, smx_actor_t, process);
456 /** @brief Ask another process to raise the given exception
458 * @param process The process that should raise that exception
459 * @param cat category of exception
460 * @param value value associated to the exception
461 * @param msg string information associated to the exception
463 void SIMIX_process_throw(smx_actor_t process, xbt_errcat_t cat, int value, const char *msg) {
464 SMX_EXCEPTION(process, cat, value, msg);
466 if (process->suspended)
467 SIMIX_process_resume(process);
469 /* cancel the blocking synchro if any */
470 if (process->waiting_synchro) {
472 simgrid::kernel::activity::ExecImplPtr exec =
473 boost::dynamic_pointer_cast<simgrid::kernel::activity::ExecImpl>(process->waiting_synchro);
474 if (exec != nullptr) {
475 SIMIX_execution_cancel(process->waiting_synchro);
478 simgrid::kernel::activity::CommImplPtr comm =
479 boost::dynamic_pointer_cast<simgrid::kernel::activity::CommImpl>(process->waiting_synchro);
480 if (comm != nullptr) {
481 process->comms.remove(comm);
485 simgrid::kernel::activity::SleepImplPtr sleep =
486 boost::dynamic_pointer_cast<simgrid::kernel::activity::SleepImpl>(process->waiting_synchro);
487 if (sleep != nullptr) {
488 SIMIX_process_sleep_destroy(process->waiting_synchro);
489 if (not xbt_dynar_member(simix_global->process_to_run, &(process)) && process != SIMIX_process_self()) {
490 XBT_DEBUG("Inserting %s in the to_run list", process->name.c_str());
491 xbt_dynar_push_as(simix_global->process_to_run, smx_actor_t, process);
495 simgrid::kernel::activity::RawImplPtr raw =
496 boost::dynamic_pointer_cast<simgrid::kernel::activity::RawImpl>(process->waiting_synchro);
497 if (raw != nullptr) {
498 SIMIX_synchro_stop_waiting(process, &process->simcall);
501 simgrid::kernel::activity::IoImplPtr io =
502 boost::dynamic_pointer_cast<simgrid::kernel::activity::IoImpl>(process->waiting_synchro);
504 SIMIX_io_destroy(process->waiting_synchro);
507 process->waiting_synchro = nullptr;
511 void simcall_HANDLER_process_killall(smx_simcall_t simcall, int reset_pid) {
512 SIMIX_process_killall(simcall->issuer, reset_pid);
515 * \brief Kills all running processes.
516 * \param issuer this one will not be killed
518 void SIMIX_process_killall(smx_actor_t issuer, int reset_pid)
520 for (auto kv : simix_global->process_list)
521 if (kv.second != issuer)
522 SIMIX_process_kill(kv.second, issuer);
525 simix_process_maxpid = reset_pid;
527 SIMIX_context_runall();
529 SIMIX_process_empty_trash();
532 void simcall_HANDLER_process_set_host(smx_simcall_t simcall, smx_actor_t process, sg_host_t dest)
534 process->new_host = dest;
537 void SIMIX_process_change_host(smx_actor_t process, sg_host_t dest)
539 xbt_assert((process != nullptr), "Invalid parameters");
540 xbt_swag_remove(process, process->host->extension<simgrid::simix::Host>()->process_list);
541 process->host = dest;
542 xbt_swag_insert(process, dest->extension<simgrid::simix::Host>()->process_list);
546 void simcall_HANDLER_process_suspend(smx_simcall_t simcall, smx_actor_t process)
548 smx_activity_t sync_suspend = SIMIX_process_suspend(process, simcall->issuer);
550 if (process != simcall->issuer) {
551 SIMIX_simcall_answer(simcall);
553 sync_suspend->simcalls.push_back(simcall);
554 process->waiting_synchro = sync_suspend;
555 process->waiting_synchro->suspend();
557 /* If we are suspending ourselves, then just do not finish the simcall now */
560 smx_activity_t SIMIX_process_suspend(smx_actor_t process, smx_actor_t issuer)
562 if (process->suspended) {
563 XBT_DEBUG("Process '%s' is already suspended", process->name.c_str());
567 process->suspended = 1;
569 /* If we are suspending another process that is waiting on a sync, suspend its synchronization. */
570 if (process != issuer) {
572 if (process->waiting_synchro)
573 process->waiting_synchro->suspend();
574 /* If the other process is not waiting, its suspension is delayed to when the process is rescheduled. */
578 return SIMIX_execution_start(process, "suspend", 0.0, 1.0, 0.0);
582 void SIMIX_process_resume(smx_actor_t process)
584 XBT_IN("process = %p", process);
586 if (process->context->iwannadie) {
587 XBT_VERB("Ignoring request to suspend a process that is currently dying.");
591 if (not process->suspended)
593 process->suspended = 0;
595 /* resume the synchronization that was blocking the resumed process. */
596 if (process->waiting_synchro)
597 process->waiting_synchro->resume();
602 int SIMIX_process_get_maxpid() {
603 return simix_process_maxpid;
606 int SIMIX_process_count()
608 return simix_global->process_list.size();
611 int SIMIX_process_get_PID(smx_actor_t self)
619 void* SIMIX_process_self_get_data()
621 smx_actor_t self = SIMIX_process_self();
629 void SIMIX_process_self_set_data(void *data)
631 smx_actor_t self = SIMIX_process_self();
633 SIMIX_process_set_data(self, data);
636 void SIMIX_process_set_data(smx_actor_t process, void *data)
638 process->data = data;
641 /* needs to be public and without simcall because it is called
642 by exceptions and logging events */
643 const char* SIMIX_process_self_get_name() {
645 smx_actor_t process = SIMIX_process_self();
646 if (process == nullptr || process == simix_global->maestro_process)
649 return process->name.c_str();
652 smx_actor_t SIMIX_process_get_by_name(const char* name)
654 for (auto kv : simix_global->process_list)
655 if (kv.second->name == name)
660 int SIMIX_process_is_suspended(smx_actor_t process)
662 return process->suspended;
665 xbt_dict_t SIMIX_process_get_properties(smx_actor_t process)
667 return process->properties;
670 void simcall_HANDLER_process_join(smx_simcall_t simcall, smx_actor_t process, double timeout)
672 if (process->finished) {
673 // The joined process is already finished, just wake up the issuer process right away
674 simcall_process_sleep__set__result(simcall, SIMIX_DONE);
675 SIMIX_simcall_answer(simcall);
678 smx_activity_t sync = SIMIX_process_join(simcall->issuer, process, timeout);
679 sync->simcalls.push_back(simcall);
680 simcall->issuer->waiting_synchro = sync;
683 static int SIMIX_process_join_finish(smx_process_exit_status_t status, void* synchro)
685 simgrid::kernel::activity::SleepImpl* sleep = static_cast<simgrid::kernel::activity::SleepImpl*>(synchro);
687 if (sleep->surf_sleep) {
688 sleep->surf_sleep->cancel();
690 while (not sleep->simcalls.empty()) {
691 smx_simcall_t simcall = sleep->simcalls.front();
692 sleep->simcalls.pop_front();
693 simcall_process_sleep__set__result(simcall, SIMIX_DONE);
694 simcall->issuer->waiting_synchro = nullptr;
695 if (simcall->issuer->suspended) {
696 XBT_DEBUG("Wait! This process is suspended and can't wake up now.");
697 simcall->issuer->suspended = 0;
698 simcall_HANDLER_process_suspend(simcall, simcall->issuer);
700 SIMIX_simcall_answer(simcall);
703 sleep->surf_sleep->unref();
704 sleep->surf_sleep = nullptr;
706 // intrusive_ptr_release(process); // FIXME: We are leaking here. See comment in SIMIX_process_join()
710 smx_activity_t SIMIX_process_join(smx_actor_t issuer, smx_actor_t process, double timeout)
712 smx_activity_t res = SIMIX_process_sleep(issuer, timeout);
713 intrusive_ptr_add_ref(res.get());
714 /* We are leaking the process here, but if we don't take the ref, we get a "use after free".
715 * The correct solution would be to derivate the type SynchroSleep into a SynchroProcessJoin,
716 * but the code is not clean enough for now for this.
717 * The C API should first be properly replaced with the C++ one, which is a fair amount of work.
719 intrusive_ptr_add_ref(process);
720 SIMIX_process_on_exit(process, (int_f_pvoid_pvoid_t)SIMIX_process_join_finish, &*res);
724 void simcall_HANDLER_process_sleep(smx_simcall_t simcall, double duration)
726 if (MC_is_active() || MC_record_replay_is_active()) {
727 MC_process_clock_add(simcall->issuer, duration);
728 simcall_process_sleep__set__result(simcall, SIMIX_DONE);
729 SIMIX_simcall_answer(simcall);
732 smx_activity_t sync = SIMIX_process_sleep(simcall->issuer, duration);
733 sync->simcalls.push_back(simcall);
734 simcall->issuer->waiting_synchro = sync;
737 smx_activity_t SIMIX_process_sleep(smx_actor_t process, double duration)
739 sg_host_t host = process->host;
742 THROWF(host_error, 0, "Host %s failed, you cannot sleep there.", host->cname());
744 simgrid::kernel::activity::SleepImpl* synchro = new simgrid::kernel::activity::SleepImpl();
745 synchro->host = host;
746 synchro->surf_sleep = host->pimpl_cpu->sleep(duration);
747 synchro->surf_sleep->setData(synchro);
748 XBT_DEBUG("Create sleep synchronization %p", synchro);
753 void SIMIX_process_sleep_destroy(smx_activity_t synchro)
755 XBT_DEBUG("Destroy sleep synchro %p", synchro.get());
756 simgrid::kernel::activity::SleepImplPtr sleep =
757 boost::dynamic_pointer_cast<simgrid::kernel::activity::SleepImpl>(synchro);
759 if (sleep->surf_sleep) {
760 sleep->surf_sleep->unref();
761 sleep->surf_sleep = nullptr;
766 * \brief Calling this function makes the process to yield.
768 * Only the current process can call this function, giving back the control to
771 * \param self the current process
773 void SIMIX_process_yield(smx_actor_t self)
775 XBT_DEBUG("Yield actor '%s'", self->cname());
777 /* Go into sleep and return control to maestro */
778 self->context->suspend();
780 /* Ok, maestro returned control to us */
781 XBT_DEBUG("Control returned to me: '%s'", self->name.c_str());
783 if (self->new_host) {
784 SIMIX_process_change_host(self, self->new_host);
785 self->new_host = nullptr;
788 if (self->context->iwannadie){
789 XBT_DEBUG("I wanna die!");
790 self->finished = true;
791 /* execute the on_exit functions */
792 SIMIX_process_on_exit_runall(self);
793 /* Add the process to the list of process to restart, only if the host is down */
794 if (self->auto_restart && self->host->isOff()) {
795 SIMIX_host_add_auto_restart_process(self->host, self->cname(),
796 self->code, self->data,
797 SIMIX_timer_get_date(self->kill_timer),
801 XBT_DEBUG("Process %s@%s is dead", self->cname(), self->host->cname());
802 self->context->stop();
805 if (self->suspended) {
806 XBT_DEBUG("Hey! I'm suspended.");
807 xbt_assert(self->exception != nullptr, "Gasp! This exception may be lost by subsequent calls.");
809 SIMIX_process_suspend(self, self);
812 if (self->exception != nullptr) {
813 XBT_DEBUG("Wait, maestro left me an exception");
814 std::exception_ptr exception = std::move(self->exception);
815 self->exception = nullptr;
816 std::rethrow_exception(std::move(exception));
819 if(SMPI_switch_data_segment && self->segment_index != -1){
820 SMPI_switch_data_segment(self->segment_index);
824 /* callback: termination */
825 void SIMIX_process_exception_terminate(xbt_ex_t * e)
831 smx_context_t SIMIX_process_get_context(smx_actor_t p) {
835 void SIMIX_process_set_context(smx_actor_t p,smx_context_t c) {
840 * \brief Returns the list of processes to run.
842 xbt_dynar_t SIMIX_process_get_runnable()
844 return simix_global->process_to_run;
848 * \brief Returns the process from PID.
850 smx_actor_t SIMIX_process_from_PID(aid_t PID)
852 if (simix_global->process_list.find(PID) == simix_global->process_list.end())
854 return simix_global->process_list.at(PID);
857 /** @brief returns a dynar containing all currently existing processes */
858 xbt_dynar_t SIMIX_processes_as_dynar() {
859 xbt_dynar_t res = xbt_dynar_new(sizeof(smx_actor_t),nullptr);
860 for (auto kv : simix_global->process_list) {
861 smx_actor_t proc = kv.second;
862 xbt_dynar_push(res,&proc);
867 void SIMIX_process_on_exit_runall(smx_actor_t process) {
868 smx_process_exit_status_t exit_status = (process->context->iwannadie) ? SMX_EXIT_FAILURE : SMX_EXIT_SUCCESS;
869 while (not process->on_exit.empty()) {
870 s_smx_process_exit_fun_t exit_fun = process->on_exit.back();
871 (exit_fun.fun)((void*)exit_status, exit_fun.arg);
872 process->on_exit.pop_back();
876 void SIMIX_process_on_exit(smx_actor_t process, int_f_pvoid_pvoid_t fun, void *data) {
877 xbt_assert(process, "current process not found: are you in maestro context ?");
879 s_smx_process_exit_fun_t exit_fun = {fun, data};
881 process->on_exit.push_back(exit_fun);
885 * \brief Sets the auto-restart status of the process.
886 * If set to 1, the process will be automatically restarted when its host
889 void SIMIX_process_auto_restart_set(smx_actor_t process, int auto_restart) {
890 process->auto_restart = auto_restart;
893 smx_actor_t simcall_HANDLER_process_restart(smx_simcall_t simcall, smx_actor_t process) {
894 return SIMIX_process_restart(process, simcall->issuer);
896 /** @brief Restart a process, starting it again from the beginning. */
897 smx_actor_t SIMIX_process_restart(smx_actor_t process, smx_actor_t issuer) {
898 XBT_DEBUG("Restarting process %s on %s", process->cname(), process->host->cname());
900 //retrieve the arguments of the old process
901 //FIXME: Factorize this with SIMIX_host_add_auto_restart_process ?
902 simgrid::simix::ProcessArg arg;
903 arg.name = process->name;
904 arg.code = process->code;
905 arg.host = process->host;
906 arg.kill_time = SIMIX_timer_get_date(process->kill_timer);
907 arg.data = process->data;
908 arg.properties = nullptr;
909 arg.auto_restart = process->auto_restart;
911 //kill the old process
912 SIMIX_process_kill(process, issuer);
914 //start the new process
915 smx_actor_t actor = simix_global->create_process_function(arg.name.c_str(), std::move(arg.code), arg.data, arg.host,
916 arg.properties, nullptr);
917 if (arg.kill_time >= 0)
918 simcall_process_set_kill_time(actor, arg.kill_time);
919 if (arg.auto_restart)
920 simcall_process_auto_restart_set(actor, arg.auto_restart);
925 void SIMIX_segment_index_set(smx_actor_t proc, int index){
926 proc->segment_index = index;
930 * \ingroup simix_process_management
931 * \brief Creates and runs a new SIMIX process.
933 * The structure and the corresponding thread are created and put in the list of ready processes.
935 * \param name a name for the process. It is for user-level information and can be nullptr.
936 * \param code the main function of the process
937 * \param data a pointer to any data one may want to attach to the new object. It is for user-level information and can be nullptr.
938 * It can be retrieved with the function \ref simcall_process_get_data.
939 * \param host where the new agent is executed.
940 * \param kill_time time when the process is killed
941 * \param argc first argument passed to \a code
942 * \param argv second argument passed to \a code
943 * \param properties the properties of the process
944 * \param auto_restart either it is autorestarting or not.
947 smx_actor_t simcall_process_create(const char* name, xbt_main_func_t code, void* data, sg_host_t host, int argc,
948 char** argv, xbt_dict_t properties)
952 auto wrapped_code = simgrid::xbt::wrapMain(code, argc, argv);
953 for (int i = 0; i != argc; ++i)
956 smx_actor_t res = simcall_process_create(name, std::move(wrapped_code), data, host, properties);
960 smx_actor_t simcall_process_create(const char* name, std::function<void()> code, void* data, sg_host_t host,
961 xbt_dict_t properties)
965 smx_actor_t self = SIMIX_process_self();
966 return simgrid::simix::kernelImmediate([name, code, data, host, properties, self] {
967 return SIMIX_process_create(name, std::move(code), data, host, properties, self);