1 /* Copyright (c) 2007-2021. 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. */
6 #include "src/kernel/activity/CommImpl.hpp"
7 #include "simgrid/Exception.hpp"
8 #include "simgrid/kernel/resource/Action.hpp"
9 #include "simgrid/kernel/routing/NetPoint.hpp"
10 #include "simgrid/modelchecker.h"
11 #include "simgrid/s4u/Host.hpp"
12 #include "src/kernel/activity/MailboxImpl.hpp"
13 #include "src/kernel/context/Context.hpp"
14 #include "src/mc/mc_replay.hpp"
15 #include "src/surf/cpu_interface.hpp"
16 #include "src/surf/network_interface.hpp"
17 #include "src/surf/surf_interface.hpp"
19 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(simix_network, simix, "SIMIX network-related synchronization");
21 XBT_PRIVATE void simcall_HANDLER_comm_send(smx_simcall_t simcall, smx_actor_t src, smx_mailbox_t mbox, double task_size,
22 double rate, unsigned char* src_buff, size_t src_buff_size,
23 bool (*match_fun)(void*, void*, simgrid::kernel::activity::CommImpl*),
24 void (*copy_data_fun)(simgrid::kernel::activity::CommImpl*, void*, size_t),
25 void* data, double timeout)
27 simgrid::kernel::activity::ActivityImplPtr comm = simcall_HANDLER_comm_isend(
28 simcall, src, mbox, task_size, rate, src_buff, src_buff_size, match_fun, nullptr, copy_data_fun, data, false);
29 simcall->mc_value_ = 0;
30 simcall_HANDLER_comm_wait(simcall, static_cast<simgrid::kernel::activity::CommImpl*>(comm.get()), timeout);
33 XBT_PRIVATE simgrid::kernel::activity::ActivityImplPtr simcall_HANDLER_comm_isend(
34 smx_simcall_t /*simcall*/, smx_actor_t src_proc, smx_mailbox_t mbox, double task_size, double rate,
35 unsigned char* src_buff, size_t src_buff_size,
36 bool (*match_fun)(void*, void*, simgrid::kernel::activity::CommImpl*),
37 void (*clean_fun)(void*), // used to free the synchro in case of problem after a detached send
38 void (*copy_data_fun)(simgrid::kernel::activity::CommImpl*, void*, size_t), // used to copy data if not default one
39 void* data, bool detached)
41 XBT_DEBUG("send from mailbox %p", mbox);
43 /* Prepare a synchro describing us, so that it gets passed to the user-provided filter of other side */
44 simgrid::kernel::activity::CommImplPtr this_comm(
45 new simgrid::kernel::activity::CommImpl(simgrid::kernel::activity::CommImpl::Type::SEND));
47 /* Look for communication synchro matching our needs. We also provide a description of
48 * ourself so that the other side also gets a chance of choosing if it wants to match with us.
50 * If it is not found then push our communication into the rendez-vous point */
51 simgrid::kernel::activity::CommImplPtr other_comm =
52 mbox->find_matching_comm(simgrid::kernel::activity::CommImpl::Type::RECEIVE, match_fun, data, this_comm,
53 /*done*/ false, /*remove_matching*/ true);
56 other_comm = std::move(this_comm);
58 if (mbox->permanent_receiver_ != nullptr) {
59 // this mailbox is for small messages, which have to be sent right now
60 other_comm->state_ = simgrid::kernel::activity::State::READY;
61 other_comm->dst_actor_ = mbox->permanent_receiver_.get();
62 mbox->done_comm_queue_.push_back(other_comm);
63 XBT_DEBUG("pushing a message into the permanent receive list %p, comm %p", mbox, other_comm.get());
66 mbox->push(other_comm);
69 XBT_DEBUG("Receive already pushed");
71 other_comm->state_ = simgrid::kernel::activity::State::READY;
76 other_comm->clean_fun = clean_fun;
78 other_comm->clean_fun = nullptr;
79 src_proc->activities_.emplace_back(other_comm);
82 /* Setup the communication synchro */
83 other_comm->src_actor_ = src_proc;
84 other_comm->src_data_ = data;
85 (*other_comm).set_src_buff(src_buff, src_buff_size).set_size(task_size).set_rate(rate);
87 other_comm->match_fun = match_fun;
88 other_comm->copy_data_fun = copy_data_fun;
90 if (MC_is_active() || MC_record_replay_is_active())
91 other_comm->state_ = simgrid::kernel::activity::State::RUNNING;
95 return (detached ? nullptr : other_comm);
98 XBT_PRIVATE void simcall_HANDLER_comm_recv(smx_simcall_t simcall, smx_actor_t receiver, smx_mailbox_t mbox,
99 unsigned char* dst_buff, size_t* dst_buff_size,
100 bool (*match_fun)(void*, void*, simgrid::kernel::activity::CommImpl*),
101 void (*copy_data_fun)(simgrid::kernel::activity::CommImpl*, void*, size_t),
102 void* data, double timeout, double rate)
104 simgrid::kernel::activity::ActivityImplPtr comm = simcall_HANDLER_comm_irecv(
105 simcall, receiver, mbox, dst_buff, dst_buff_size, match_fun, copy_data_fun, data, rate);
106 simcall->mc_value_ = 0;
107 simcall_HANDLER_comm_wait(simcall, static_cast<simgrid::kernel::activity::CommImpl*>(comm.get()), timeout);
110 XBT_PRIVATE simgrid::kernel::activity::ActivityImplPtr
111 simcall_HANDLER_comm_irecv(smx_simcall_t /*simcall*/, smx_actor_t receiver, smx_mailbox_t mbox, unsigned char* dst_buff,
112 size_t* dst_buff_size, bool (*match_fun)(void*, void*, simgrid::kernel::activity::CommImpl*),
113 void (*copy_data_fun)(simgrid::kernel::activity::CommImpl*, void*, size_t), void* data,
116 simgrid::kernel::activity::CommImplPtr this_synchro(
117 new simgrid::kernel::activity::CommImpl(simgrid::kernel::activity::CommImpl::Type::RECEIVE));
118 XBT_DEBUG("recv from mbox %p. this_synchro=%p", mbox, this_synchro.get());
120 simgrid::kernel::activity::CommImplPtr other_comm;
121 // communication already done, get it inside the list of completed comms
122 if (mbox->permanent_receiver_ != nullptr && not mbox->done_comm_queue_.empty()) {
123 XBT_DEBUG("We have a comm that has probably already been received, trying to match it, to skip the communication");
124 // find a match in the list of already received comms
125 other_comm = mbox->find_matching_comm(simgrid::kernel::activity::CommImpl::Type::SEND, match_fun, data,
126 this_synchro, /*done*/ true,
127 /*remove_matching*/ true);
128 // if not found, assume the receiver came first, register it to the mailbox in the classical way
129 if (not other_comm) {
130 XBT_DEBUG("We have messages in the permanent receive list, but not the one we are looking for, pushing request "
132 other_comm = std::move(this_synchro);
133 mbox->push(other_comm);
135 if (other_comm->surf_action_ && other_comm->get_remaining() < 1e-12) {
136 XBT_DEBUG("comm %p has been already sent, and is finished, destroy it", other_comm.get());
137 other_comm->state_ = simgrid::kernel::activity::State::DONE;
138 other_comm->set_mailbox(nullptr);
142 /* Prepare a comm describing us, so that it gets passed to the user-provided filter of other side */
144 /* Look for communication activity matching our needs. We also provide a description of
145 * ourself so that the other side also gets a chance of choosing if it wants to match with us.
147 * If it is not found then push our communication into the rendez-vous point */
148 other_comm = mbox->find_matching_comm(simgrid::kernel::activity::CommImpl::Type::SEND, match_fun, data,
149 this_synchro, /*done*/ false,
150 /*remove_matching*/ true);
152 if (other_comm == nullptr) {
153 XBT_DEBUG("Receive pushed first (%zu comm enqueued so far)", mbox->comm_queue_.size());
154 other_comm = std::move(this_synchro);
155 mbox->push(other_comm);
157 XBT_DEBUG("Match my %p with the existing %p", this_synchro.get(), other_comm.get());
159 other_comm->state_ = simgrid::kernel::activity::State::READY;
161 receiver->activities_.emplace_back(other_comm);
164 /* Setup communication synchro */
165 other_comm->dst_actor_ = receiver;
166 other_comm->dst_data_ = data;
167 other_comm->set_dst_buff(dst_buff, dst_buff_size);
169 if (rate > -1.0 && (other_comm->get_rate() < 0.0 || rate < other_comm->get_rate()))
170 other_comm->set_rate(rate);
172 other_comm->match_fun = match_fun;
173 other_comm->copy_data_fun = copy_data_fun;
175 if (MC_is_active() || MC_record_replay_is_active()) {
176 other_comm->state_ = simgrid::kernel::activity::State::RUNNING;
183 void simcall_HANDLER_comm_wait(smx_simcall_t simcall, simgrid::kernel::activity::CommImpl* comm, double timeout)
185 /* Associate this simcall to the wait synchro */
186 XBT_DEBUG("simcall_HANDLER_comm_wait, %p", comm);
188 comm->register_simcall(simcall);
190 if (MC_is_active() || MC_record_replay_is_active()) {
191 int idx = simcall->mc_value_;
193 comm->state_ = simgrid::kernel::activity::State::DONE;
195 /* If we reached this point, the wait simcall must have a timeout */
196 /* Otherwise it shouldn't be enabled and executed by the MC */
200 if (comm->src_actor_ == simcall->issuer_)
201 comm->state_ = simgrid::kernel::activity::State::SRC_TIMEOUT;
203 comm->state_ = simgrid::kernel::activity::State::DST_TIMEOUT;
210 /* If the synchro has already finish perform the error handling, */
211 /* otherwise set up a waiting timeout on the right side */
212 if (comm->state_ != simgrid::kernel::activity::State::WAITING &&
213 comm->state_ != simgrid::kernel::activity::State::RUNNING) {
215 } else { /* we need a sleep action (even when there is no timeout) to be notified of host failures */
216 simgrid::kernel::resource::Action* sleep = simcall->issuer_->get_host()->pimpl_cpu->sleep(timeout);
217 sleep->set_activity(comm);
219 if (simcall->issuer_ == comm->src_actor_)
220 comm->src_timeout_ = sleep;
222 comm->dst_timeout_ = sleep;
226 bool simcall_HANDLER_comm_test(smx_simcall_t, simgrid::kernel::activity::CommImpl* comm)
231 void simcall_HANDLER_comm_testany(smx_simcall_t simcall, simgrid::kernel::activity::CommImpl* comms[], size_t count)
233 // The default result is -1 -- this means, "nothing is ready".
234 // It can be changed below, but only if something matches.
235 simcall_comm_testany__set__result(simcall, -1);
237 if (MC_is_active() || MC_record_replay_is_active()) {
238 int idx = simcall->mc_value_;
240 simcall->issuer_->simcall_answer();
242 simgrid::kernel::activity::CommImpl* comm = comms[idx];
243 simcall_comm_testany__set__result(simcall, idx);
244 comm->simcalls_.push_back(simcall);
245 comm->state_ = simgrid::kernel::activity::State::DONE;
251 for (std::size_t i = 0; i != count; ++i) {
252 simgrid::kernel::activity::CommImpl* comm = comms[i];
253 if (comm->state_ != simgrid::kernel::activity::State::WAITING &&
254 comm->state_ != simgrid::kernel::activity::State::RUNNING) {
255 simcall_comm_testany__set__result(simcall, i);
256 comm->simcalls_.push_back(simcall);
261 simcall->issuer_->simcall_answer();
264 static void SIMIX_waitany_remove_simcall_from_actions(smx_simcall_t simcall)
266 simgrid::kernel::activity::CommImpl** comms = simcall_comm_waitany__get__comms(simcall);
267 size_t count = simcall_comm_waitany__get__count(simcall);
269 for (size_t i = 0; i < count; i++)
270 comms[i]->unregister_simcall(simcall);
272 void simcall_HANDLER_comm_waitany(smx_simcall_t simcall, simgrid::kernel::activity::CommImpl* comms[], size_t count,
275 if (MC_is_active() || MC_record_replay_is_active()) {
276 xbt_assert(timeout <= 0.0, "Timeout not implemented for waitany in the model-checker");
277 int idx = simcall->mc_value_;
278 auto* comm = comms[idx];
279 comm->simcalls_.push_back(simcall);
280 simcall_comm_waitany__set__result(simcall, idx);
281 comm->state_ = simgrid::kernel::activity::State::DONE;
287 simcall->timeout_cb_ = nullptr;
289 simcall->timeout_cb_ = simgrid::simix::Timer::set(SIMIX_get_clock() + timeout, [simcall]() {
290 simcall->timeout_cb_ = nullptr;
291 SIMIX_waitany_remove_simcall_from_actions(simcall);
292 simcall_comm_waitany__set__result(simcall, -1);
293 simcall->issuer_->simcall_answer();
297 for (size_t i = 0; i < count; i++) {
298 /* associate this simcall to the the synchro */
299 auto* comm = comms[i];
300 comm->simcalls_.push_back(simcall);
302 /* see if the synchro is already finished */
303 if (comm->state_ != simgrid::kernel::activity::State::WAITING &&
304 comm->state_ != simgrid::kernel::activity::State::RUNNING) {
311 /******************************************************************************/
312 /* SIMIX_comm_copy_data callbacks */
313 /******************************************************************************/
314 void SIMIX_comm_set_copy_data_callback(void (*callback)(simgrid::kernel::activity::CommImpl*, void*, size_t))
316 simgrid::kernel::activity::CommImpl::set_copy_data_callback(callback);
319 void SIMIX_comm_copy_buffer_callback(simgrid::kernel::activity::CommImpl* comm, void* buff, size_t buff_size)
321 XBT_DEBUG("Copy the data over");
322 memcpy(comm->dst_buff_, buff, buff_size);
323 if (comm->detached()) { // if this is a detached send, the source buffer was duplicated by SMPI sender to make the
324 // original buffer available to the application ASAP
326 comm->src_buff_ = nullptr;
330 void SIMIX_comm_copy_pointer_callback(simgrid::kernel::activity::CommImpl* comm, void* buff, size_t buff_size)
332 xbt_assert((buff_size == sizeof(void*)), "Cannot copy %zu bytes: must be sizeof(void*)", buff_size);
333 *(void**)(comm->dst_buff_) = buff;
340 void (*CommImpl::copy_data_callback_)(CommImpl*, void*, size_t) = &SIMIX_comm_copy_pointer_callback;
342 void CommImpl::set_copy_data_callback(void (*callback)(CommImpl*, void*, size_t))
344 copy_data_callback_ = callback;
347 CommImpl& CommImpl::set_size(double size)
353 CommImpl& CommImpl::set_rate(double rate)
358 CommImpl& CommImpl::set_mailbox(MailboxImpl* mbox)
364 CommImpl& CommImpl::set_src_buff(unsigned char* buff, size_t size)
367 src_buff_size_ = size;
371 CommImpl& CommImpl::set_dst_buff(unsigned char* buff, size_t* size)
374 dst_buff_size_ = size;
378 CommImpl& CommImpl::detach()
384 CommImpl::CommImpl(s4u::Host* from, s4u::Host* to, double bytes) : size_(bytes), detached_(true), from_(from), to_(to)
386 state_ = State::READY;
389 CommImpl::~CommImpl()
391 XBT_DEBUG("Really free communication %p in state %s (detached = %d)", this, get_state_str(), detached_);
395 if (detached_ && state_ != State::DONE) {
396 /* the communication has failed and was detached:
397 * we have to free the buffer */
399 clean_fun(src_buff_);
406 /** @brief Starts the simulation of a communication synchro. */
407 CommImpl* CommImpl::start()
409 /* If both the sender and the receiver are already there, start the communication */
410 if (state_ == State::READY) {
411 from_ = from_ != nullptr ? from_ : src_actor_->get_host();
412 to_ = to_ != nullptr ? to_ : dst_actor_->get_host();
414 /* FIXME[donassolo]: getting the network_model from the origin host
415 * Soon we need to change this function to first get the routes and later
416 * create the respective surf actions */
417 auto net_model = from_->get_netpoint()->get_englobing_zone()->get_network_model();
419 surf_action_ = net_model->communicate(from_, to_, size_, rate_);
420 surf_action_->set_activity(this);
421 surf_action_->set_category(get_tracing_category());
422 state_ = State::RUNNING;
424 XBT_DEBUG("Starting communication %p from '%s' to '%s' (surf_action: %p; state: %s)", this, from_->get_cname(),
425 to_->get_cname(), surf_action_, get_state_str());
427 /* If a link is failed, detect it immediately */
428 if (surf_action_->get_state() == resource::Action::State::FAILED) {
429 XBT_DEBUG("Communication from '%s' to '%s' failed to start because of a link failure", from_->get_cname(),
431 state_ = State::LINK_FAILURE;
434 } else if ((src_actor_ != nullptr && src_actor_->is_suspended()) ||
435 (dst_actor_ != nullptr && dst_actor_->is_suspended())) {
436 /* If any of the process is suspended, create the synchro but stop its execution,
437 it will be restarted when the sender process resume */
438 if (src_actor_->is_suspended())
439 XBT_DEBUG("The communication is suspended on startup because src (%s@%s) was suspended since it initiated the "
441 src_actor_->get_cname(), src_actor_->get_host()->get_cname());
443 XBT_DEBUG("The communication is suspended on startup because dst (%s@%s) was suspended since it initiated the "
445 dst_actor_->get_cname(), dst_actor_->get_host()->get_cname());
447 surf_action_->suspend();
454 /** @brief Copy the communication data from the sender's buffer to the receiver's one */
455 void CommImpl::copy_data()
457 size_t buff_size = src_buff_size_;
458 /* If there is no data to copy then return */
459 if (not src_buff_ || not dst_buff_ || copied_)
462 XBT_DEBUG("Copying comm %p data from %s (%p) -> %s (%p) (%zu bytes)", this,
463 src_actor_ ? src_actor_->get_host()->get_cname() : "a finished process", src_buff_,
464 dst_actor_ ? dst_actor_->get_host()->get_cname() : "a finished process", dst_buff_, buff_size);
466 /* Copy at most dst_buff_size bytes of the message to receiver's buffer */
467 if (dst_buff_size_) {
468 buff_size = std::min(buff_size, *dst_buff_size_);
470 /* Update the receiver's buffer size to the copied amount */
471 *dst_buff_size_ = buff_size;
476 copy_data_fun(this, src_buff_, buff_size);
478 copy_data_callback_(this, src_buff_, buff_size);
481 /* Set the copied flag so we copy data only once */
482 /* (this function might be called from both communication ends) */
486 bool CommImpl::test()
488 if ((MC_is_active() || MC_record_replay_is_active()) && src_actor_ && dst_actor_)
489 state_ = State::DONE;
490 return ActivityImpl::test();
493 void CommImpl::suspend()
495 /* FIXME: shall we suspend also the timeout synchro? */
497 surf_action_->suspend();
498 /* if not created yet, the action will be suspended on creation, in CommImpl::start() */
501 void CommImpl::resume()
503 /*FIXME: check what happen with the timeouts */
505 surf_action_->resume();
506 /* in the other case, the synchro were not really suspended yet, see CommImpl::suspend() and CommImpl::start() */
509 void CommImpl::cancel()
511 /* if the synchro is a waiting state means that it is still in a mbox so remove from it and delete it */
512 if (state_ == State::WAITING) {
515 state_ = State::CANCELED;
517 } else if (not MC_is_active() /* when running the MC there are no surf actions */
518 && not MC_record_replay_is_active() && (state_ == State::READY || state_ == State::RUNNING)) {
519 surf_action_->cancel();
523 /** @brief This is part of the cleanup process, probably an internal command */
524 void CommImpl::cleanup_surf()
529 src_timeout_->unref();
530 src_timeout_ = nullptr;
534 dst_timeout_->unref();
535 dst_timeout_ = nullptr;
539 void CommImpl::post()
541 /* Update synchro state */
542 if (src_timeout_ && src_timeout_->get_state() == resource::Action::State::FINISHED)
543 state_ = State::SRC_TIMEOUT;
544 else if (dst_timeout_ && dst_timeout_->get_state() == resource::Action::State::FINISHED)
545 state_ = State::DST_TIMEOUT;
546 else if (src_timeout_ && src_timeout_->get_state() == resource::Action::State::FAILED)
547 state_ = State::SRC_HOST_FAILURE;
548 else if (dst_timeout_ && dst_timeout_->get_state() == resource::Action::State::FAILED)
549 state_ = State::DST_HOST_FAILURE;
550 else if (surf_action_ && surf_action_->get_state() == resource::Action::State::FAILED) {
551 state_ = State::LINK_FAILURE;
553 state_ = State::DONE;
555 XBT_DEBUG("CommImpl::post(): comm %p, state %s, src_proc %p, dst_proc %p, detached: %d", this, get_state_str(),
556 src_actor_.get(), dst_actor_.get(), detached_);
558 /* destroy the surf actions associated with the Simix communication */
561 /* Answer all simcalls associated with the synchro */
565 void CommImpl::finish()
567 XBT_DEBUG("CommImpl::finish() in state %s", to_c_str(state_));
569 /* If the synchro is still in a rendez-vous point then remove from it */
573 if (state_ == State::DONE)
576 while (not simcalls_.empty()) {
577 smx_simcall_t simcall = simcalls_.front();
578 simcalls_.pop_front();
580 /* If a waitany simcall is waiting for this synchro to finish, then remove it from the other synchros in the waitany
581 * list. Afterwards, get the position of the actual synchro in the waitany list and return it as the result of the
584 if (simcall->call_ == simix::Simcall::NONE) // FIXME: maybe a better way to handle this case
585 continue; // if actor handling comm is killed
586 if (simcall->call_ == simix::Simcall::COMM_WAITANY) {
587 SIMIX_waitany_remove_simcall_from_actions(simcall);
588 if (simcall->timeout_cb_) {
589 simcall->timeout_cb_->remove();
590 simcall->timeout_cb_ = nullptr;
592 if (not MC_is_active() && not MC_record_replay_is_active()) {
593 CommImpl** comms = simcall_comm_waitany__get__comms(simcall);
594 size_t count = simcall_comm_waitany__get__count(simcall);
595 CommImpl** element = std::find(comms, comms + count, this);
596 int rank = (element != comms + count) ? element - comms : -1;
597 simcall_comm_waitany__set__result(simcall, rank);
601 /* Check out for errors */
603 if (not simcall->issuer_->get_host()->is_on()) {
604 simcall->issuer_->context_->set_wannadie();
607 case State::SRC_TIMEOUT:
608 simcall->issuer_->exception_ = std::make_exception_ptr(
609 simgrid::TimeoutException(XBT_THROW_POINT, "Communication timeouted because of the sender"));
612 case State::DST_TIMEOUT:
613 simcall->issuer_->exception_ = std::make_exception_ptr(
614 simgrid::TimeoutException(XBT_THROW_POINT, "Communication timeouted because of the receiver"));
617 case State::SRC_HOST_FAILURE:
618 if (simcall->issuer_ == src_actor_)
619 simcall->issuer_->context_->set_wannadie();
621 simcall->issuer_->exception_ =
622 std::make_exception_ptr(simgrid::NetworkFailureException(XBT_THROW_POINT, "Remote peer failed"));
625 case State::DST_HOST_FAILURE:
626 if (simcall->issuer_ == dst_actor_)
627 simcall->issuer_->context_->set_wannadie();
629 simcall->issuer_->exception_ =
630 std::make_exception_ptr(simgrid::NetworkFailureException(XBT_THROW_POINT, "Remote peer failed"));
633 case State::LINK_FAILURE:
634 XBT_DEBUG("Link failure in synchro %p between '%s' and '%s': posting an exception to the issuer: %s (%p) "
636 this, src_actor_ ? src_actor_->get_host()->get_cname() : nullptr,
637 dst_actor_ ? dst_actor_->get_host()->get_cname() : nullptr, simcall->issuer_->get_cname(),
638 simcall->issuer_, detached_);
639 if (src_actor_ == simcall->issuer_) {
640 XBT_DEBUG("I'm source");
641 } else if (dst_actor_ == simcall->issuer_) {
642 XBT_DEBUG("I'm dest");
644 XBT_DEBUG("I'm neither source nor dest");
646 simcall->issuer_->throw_exception(
647 std::make_exception_ptr(simgrid::NetworkFailureException(XBT_THROW_POINT, "Link failure")));
650 case State::CANCELED:
651 if (simcall->issuer_ == dst_actor_)
652 simcall->issuer_->exception_ = std::make_exception_ptr(
653 simgrid::CancelException(XBT_THROW_POINT, "Communication canceled by the sender"));
655 simcall->issuer_->exception_ = std::make_exception_ptr(
656 simgrid::CancelException(XBT_THROW_POINT, "Communication canceled by the receiver"));
660 xbt_assert(state_ == State::DONE, "Internal error in CommImpl::finish(): unexpected synchro state %s",
663 simcall->issuer_->simcall_answer();
665 /* if there is an exception during a waitany or a testany, indicate the position of the failed communication */
666 if (simcall->issuer_->exception_ &&
667 (simcall->call_ == simix::Simcall::COMM_WAITANY || simcall->call_ == simix::Simcall::COMM_TESTANY)) {
668 // First retrieve the rank of our failing synchro
671 if (simcall->call_ == simix::Simcall::COMM_WAITANY) {
672 comms = simcall_comm_waitany__get__comms(simcall);
673 count = simcall_comm_waitany__get__count(simcall);
675 /* simcall->call_ == simix::Simcall::COMM_TESTANY */
676 comms = simcall_comm_testany__get__comms(simcall);
677 count = simcall_comm_testany__get__count(simcall);
679 CommImpl** element = std::find(comms, comms + count, this);
680 int rank = (element != comms + count) ? element - comms : -1;
681 // In order to modify the exception we have to rethrow it:
683 std::rethrow_exception(simcall->issuer_->exception_);
684 } catch (simgrid::Exception& e) {
689 simcall->issuer_->waiting_synchro_ = nullptr;
690 simcall->issuer_->activities_.remove(this);
692 if (simcall->issuer_ != dst_actor_ && dst_actor_ != nullptr)
693 dst_actor_->activities_.remove(this);
694 if (simcall->issuer_ != src_actor_ && src_actor_ != nullptr)
695 src_actor_->activities_.remove(this);
700 } // namespace activity
701 } // namespace kernel
702 } // namespace simgrid