1 /* Copyright (c) 2019-2022. 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/actor/SimcallObserver.hpp"
7 #include "simgrid/s4u/Host.hpp"
8 #include "src/kernel/activity/CommImpl.hpp"
9 #include "src/kernel/activity/MailboxImpl.hpp"
10 #include "src/kernel/activity/MutexImpl.hpp"
11 #include "src/kernel/actor/ActorImpl.hpp"
12 #include "src/mc/mc_config.hpp"
16 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_observer, mc, "Logging specific to MC simcall observation");
22 void SimcallObserver::serialize(std::stringstream& stream) const
24 stream << (short)mc::Transition::Type::UNKNOWN;
26 bool SimcallObserver::depends(SimcallObserver* other)
30 /* Random is only dependent when issued by the same actor (ie, always independent) */
31 bool RandomSimcall::depends(SimcallObserver* other)
33 return get_issuer() == other->get_issuer();
35 void RandomSimcall::serialize(std::stringstream& stream) const
37 stream << (short)mc::Transition::Type::RANDOM << ' ';
38 stream << min_ << ' ' << max_;
41 bool MutexSimcall::depends(SimcallObserver* other)
43 if (dynamic_cast<RandomSimcall*>(other) != nullptr)
44 return other->depends(this); /* Other is random, that is very permissive. Use that relation instead. */
46 #if 0 /* This code is currently broken and shouldn't be used. We must implement asynchronous locks before */
47 MutexSimcall* that = dynamic_cast<MutexSimcall*>(other);
49 return true; // Depends on anything we don't know
51 /* Theorem 4.4.7: Any pair of synchronization actions of distinct actors concerning distinct mutexes are independent */
52 if (this->get_issuer() != that->get_issuer() && this->get_mutex() != that->get_mutex())
55 /* Theorem 4.4.8 An AsyncMutexLock is independent with a MutexUnlock of another actor */
56 if (((dynamic_cast<MutexLockSimcall*>(this) != nullptr && dynamic_cast<MutexUnlockSimcall*>(that)) ||
57 (dynamic_cast<MutexLockSimcall*>(that) != nullptr && dynamic_cast<MutexUnlockSimcall*>(this))) &&
58 get_issuer() != other->get_issuer())
61 return true; // Depend on things we don't know for sure that they are independent
64 void RandomSimcall::prepare(int times_considered)
66 next_value_ = min_ + times_considered;
67 XBT_DEBUG("MC_RANDOM(%d, %d) will return %d after %d times", min_, max_, next_value_, times_considered);
70 int RandomSimcall::get_max_consider()
72 return max_ - min_ + 1;
76 std::string MutexLockSimcall::to_string(int times_considered) const
78 auto mutex = get_mutex();
79 std::string res = SimcallObserver::to_string(times_considered) + (blocking_ ? "Mutex LOCK" : "Mutex TRYLOCK");
80 res += "(locked = " + std::to_string(mutex->is_locked());
81 res += ", owner = " + std::to_string(mutex->get_owner() ? mutex->get_owner()->get_pid() : -1);
82 res += ", sleeping = n/a)";
86 bool MutexLockSimcall::is_enabled()
88 return not blocking_ || get_mutex()->get_owner() == nullptr || get_mutex()->get_owner() == get_issuer();
91 bool ConditionWaitSimcall::is_enabled()
93 static bool warned = false;
95 XBT_INFO("Using condition variables in model-checked code is still experimental. Use at your own risk");
101 bool SemAcquireSimcall::is_enabled()
103 static bool warned = false;
105 XBT_INFO("Using semaphore in model-checked code is still experimental. Use at your own risk");
111 ActivityTestanySimcall::ActivityTestanySimcall(ActorImpl* actor, const std::vector<activity::ActivityImpl*>& activities)
112 : ResultingSimcall(actor, -1), activities_(activities)
116 int ActivityTestanySimcall::get_max_consider()
119 // list all the activities that are ready
120 for (unsigned i = 0; i < activities_.size(); i++)
121 if (activities_[i]->test(get_issuer()))
122 indexes_.push_back(i);
123 return indexes_.size() + 1;
126 void ActivityTestanySimcall::prepare(int times_considered)
128 if (times_considered < static_cast<int>(indexes_.size()))
129 next_value_ = indexes_.at(times_considered);
133 static void serialize_activity_test(const activity::ActivityImpl* act, std::stringstream& stream)
135 if (auto* comm = dynamic_cast<activity::CommImpl const*>(act)) {
136 stream << " " << (short)mc::Transition::Type::COMM_TEST;
137 stream << ' ' << (uintptr_t)comm;
138 stream << ' ' << (comm->src_actor_ != nullptr ? comm->src_actor_->get_pid() : -1);
139 stream << ' ' << (comm->dst_actor_ != nullptr ? comm->dst_actor_->get_pid() : -1);
140 stream << ' ' << comm->get_mailbox_id();
141 stream << ' ' << (uintptr_t)comm->src_buff_ << ' ' << (uintptr_t)comm->dst_buff_ << ' ' << comm->src_buff_size_;
143 stream << (short)mc::Transition::Type::UNKNOWN;
146 void ActivityTestanySimcall::serialize(std::stringstream& stream) const
148 stream << (short)mc::Transition::Type::TESTANY << ' ' << activities_.size() << ' ';
149 for (auto const& act : activities_) {
150 serialize_activity_test(act, stream);
154 void ActivityTestSimcall::serialize(std::stringstream& stream) const
156 serialize_activity_test(activity_, stream);
158 static void serialize_activity_wait(const activity::ActivityImpl* act, bool timeout, std::stringstream& stream)
160 if (auto* comm = dynamic_cast<activity::CommImpl const*>(act)) {
161 stream << (short)mc::Transition::Type::COMM_WAIT << ' ';
162 stream << timeout << ' ' << (uintptr_t)comm;
164 stream << ' ' << (comm->src_actor_ != nullptr ? comm->src_actor_->get_pid() : -1);
165 stream << ' ' << (comm->dst_actor_ != nullptr ? comm->dst_actor_->get_pid() : -1);
166 stream << ' ' << comm->get_mailbox_id();
167 stream << ' ' << (uintptr_t)comm->src_buff_ << ' ' << (uintptr_t)comm->dst_buff_ << ' ' << comm->src_buff_size_;
169 stream << (short)mc::Transition::Type::UNKNOWN;
173 void ActivityWaitSimcall::serialize(std::stringstream& stream) const
175 serialize_activity_wait(activity_, timeout_ > 0, stream);
177 void ActivityWaitanySimcall::serialize(std::stringstream& stream) const
179 stream << (short)mc::Transition::Type::WAITANY << ' ' << activities_.size() << ' ';
180 for (auto const& act : activities_) {
181 serialize_activity_wait(act, timeout_ > 0, stream);
185 ActivityWaitanySimcall::ActivityWaitanySimcall(ActorImpl* actor, const std::vector<activity::ActivityImpl*>& activities,
187 : ResultingSimcall(actor, -1), activities_(activities), timeout_(timeout)
191 bool ActivityWaitSimcall::is_enabled()
193 // FIXME: if _sg_mc_timeout == 1 and if we have either a sender or receiver timeout, the transition is enabled
194 // because even if the communication is not ready, it can timeout and won't block.
196 return activity_->test(get_issuer());
199 bool ActivityWaitanySimcall::is_enabled()
201 // list all the activities that are ready
203 for (unsigned i = 0; i < activities_.size(); i++)
204 if (activities_[i]->test(get_issuer()))
205 indexes_.push_back(i);
207 // if (_sg_mc_timeout && timeout_) FIXME: deal with the potential timeout of the WaitAny
209 // FIXME: even if the WaitAny has no timeout, some of the activities may still have one.
210 // we should iterate over the vector searching for them
211 return not indexes_.empty();
214 int ActivityWaitanySimcall::get_max_consider()
216 // list all the activities that are ready
218 for (unsigned i = 0; i < activities_.size(); i++)
219 if (activities_[i]->test(get_issuer()))
220 indexes_.push_back(i);
222 int res = indexes_.size();
223 // if (_sg_mc_timeout && timeout_)
229 void ActivityWaitanySimcall::prepare(int times_considered)
231 if (times_considered < static_cast<int>(indexes_.size()))
232 next_value_ = indexes_.at(times_considered);
237 void CommIsendSimcall::serialize(std::stringstream& stream) const
239 stream << (short)mc::Transition::Type::COMM_SEND << ' ';
240 stream << (uintptr_t)comm_ << ' ' << mbox_->get_id() << ' ' << (uintptr_t)src_buff_ << ' ' << src_buff_size_ << ' '
242 XBT_DEBUG("SendObserver comm:%p mbox:%u buff:%p size:%zu tag:%d", comm_, mbox_->get_id(), src_buff_, src_buff_size_,
246 void CommIrecvSimcall::serialize(std::stringstream& stream) const
248 stream << (short)mc::Transition::Type::COMM_RECV << ' ';
249 stream << (uintptr_t)comm_ << ' ' << mbox_->get_id() << ' ' << (uintptr_t)dst_buff_ << ' ' << tag_;
250 XBT_DEBUG("RecvObserver comm:%p mbox:%u buff:%p tag:%d", comm_, mbox_->get_id(), dst_buff_, tag_);
254 } // namespace kernel
255 } // namespace simgrid