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 bool SimcallObserver::depends(SimcallObserver* other)
26 /* Random is only dependent when issued by the same actor (ie, always independent) */
27 bool RandomSimcall::depends(SimcallObserver* other)
29 return get_issuer() == other->get_issuer();
31 void RandomSimcall::serialize(Simcall& type, std::stringstream& stream)
33 type = Simcall::RANDOM;
34 stream << min_ << ' ' << max_;
37 bool MutexSimcall::depends(SimcallObserver* other)
39 if (dynamic_cast<RandomSimcall*>(other) != nullptr)
40 return other->depends(this); /* Other is random, that is very permissive. Use that relation instead. */
42 #if 0 /* This code is currently broken and shouldn't be used. We must implement asynchronous locks before */
43 MutexSimcall* that = dynamic_cast<MutexSimcall*>(other);
45 return true; // Depends on anything we don't know
47 /* Theorem 4.4.7: Any pair of synchronization actions of distinct actors concerning distinct mutexes are independent */
48 if (this->get_issuer() != that->get_issuer() && this->get_mutex() != that->get_mutex())
51 /* Theorem 4.4.8 An AsyncMutexLock is independent with a MutexUnlock of another actor */
52 if (((dynamic_cast<MutexLockSimcall*>(this) != nullptr && dynamic_cast<MutexUnlockSimcall*>(that)) ||
53 (dynamic_cast<MutexLockSimcall*>(that) != nullptr && dynamic_cast<MutexUnlockSimcall*>(this))) &&
54 get_issuer() != other->get_issuer())
57 return true; // Depend on things we don't know for sure that they are independent
61 std::string SimcallObserver::to_string(int) const
63 return simgrid::xbt::string_printf("[(%ld)%s (%s)] ", issuer_->get_pid(), issuer_->get_host()->get_cname(),
64 issuer_->get_cname());
67 std::string SimcallObserver::dot_label(int /*times_considered*/) const
69 if (issuer_->get_host())
70 return xbt::string_printf("[(%ld)%s] ", issuer_->get_pid(), issuer_->get_host()->get_cname());
71 return xbt::string_printf("[(%ld)] ", issuer_->get_pid());
74 std::string RandomSimcall::dot_label(int times_considered) const
76 return SimcallObserver::dot_label(times_considered) + "MC_RANDOM(" + std::to_string(next_value_) + ")";
79 void RandomSimcall::prepare(int times_considered)
81 next_value_ = min_ + times_considered;
82 XBT_DEBUG("MC_RANDOM(%d, %d) will return %d after %d times", min_, max_, next_value_, times_considered);
85 int RandomSimcall::get_max_consider() const
87 return max_ - min_ + 1;
90 std::string MutexUnlockSimcall::dot_label(int times_considered) const
92 return SimcallObserver::dot_label(times_considered) + "Mutex UNLOCK";
96 std::string MutexLockSimcall::to_string(int times_considered) const
98 auto mutex = get_mutex();
99 std::string res = SimcallObserver::to_string(times_considered) + (blocking_ ? "Mutex LOCK" : "Mutex TRYLOCK");
100 res += "(locked = " + std::to_string(mutex->is_locked());
101 res += ", owner = " + std::to_string(mutex->get_owner() ? mutex->get_owner()->get_pid() : -1);
102 res += ", sleeping = n/a)";
106 std::string MutexLockSimcall::dot_label(int times_considered) const
108 return SimcallObserver::dot_label(times_considered) + (blocking_ ? "Mutex LOCK" : "Mutex TRYLOCK");
111 bool MutexLockSimcall::is_enabled() const
113 return not blocking_ || get_mutex()->get_owner() == nullptr || get_mutex()->get_owner() == get_issuer();
116 std::string ConditionWaitSimcall::dot_label(int times_considered) const
118 return SimcallObserver::dot_label(times_considered) + "Condition WAIT";
121 bool ConditionWaitSimcall::is_enabled() const
123 static bool warned = false;
125 XBT_INFO("Using condition variables in model-checked code is still experimental. Use at your own risk");
131 std::string SemAcquireSimcall::dot_label(int times_considered) const
133 return SimcallObserver::dot_label(times_considered) + "Sem ACQUIRE";
136 bool SemAcquireSimcall::is_enabled() const
138 static bool warned = false;
140 XBT_INFO("Using semaphore in model-checked code is still experimental. Use at your own risk");
146 int ActivityTestanySimcall::get_max_consider() const
148 // Only Comms are of interest to MC for now. When all types of activities can be consider, this function can simply
149 // return the size of activities_.
151 for (const auto& act : activities_)
152 if (dynamic_cast<activity::CommImpl*>(act) != nullptr)
157 void ActivityTestanySimcall::prepare(int times_considered)
159 next_value_ = times_considered;
163 std::string ActivityTestanySimcall::to_string(int times_considered) const
165 std::string res = SimcallObserver::to_string(times_considered);
166 if (times_considered == -1) {
167 res += "TestAny FALSE(-)";
169 res += "TestAny(" + xbt::string_printf("(%d of %zu)", times_considered + 1, activities_.size());
175 std::string ActivityTestanySimcall::dot_label(int times_considered) const
177 std::string res = SimcallObserver::dot_label(times_considered) + "TestAny ";
178 if (times_considered == -1) {
181 res += xbt::string_printf("TRUE [%d of %zu]", times_considered + 1, activities_.size());
186 bool ActivityTestSimcall::depends(SimcallObserver* other)
188 if (get_issuer() == other->get_issuer())
191 if (dynamic_cast<ActivityTestSimcall*>(other))
194 const auto* comm1 = dynamic_cast<activity::CommImpl*>(activity_);
195 if (comm1 == nullptr)
198 if (dynamic_cast<ActivityWaitSimcall*>(other) != nullptr &&
199 (comm1->src_actor_.get() == nullptr || comm1->dst_actor_.get() == nullptr))
202 if (comm1->src_buff_ == nullptr || comm1->dst_buff_ == nullptr)
205 if (const auto* test = dynamic_cast<ActivityTestSimcall*>(other)) {
206 const auto* comm2 = dynamic_cast<activity::CommImpl*>(test->get_activity());
207 if (comm2 == nullptr)
209 else if (comm2->src_buff_ == nullptr || comm2->dst_buff_ == nullptr)
213 if (auto* wait = dynamic_cast<ActivityWaitSimcall*>(other)) {
214 auto* comm2 = dynamic_cast<activity::CommImpl*>(wait->get_activity());
215 if (comm2 == nullptr)
217 if (comm1->src_buff_ == comm2->src_buff_ && comm1->dst_buff_ == comm2->dst_buff_)
219 if (comm1->src_buff_ != nullptr && comm1->dst_buff_ != nullptr && comm2->src_buff_ != nullptr &&
220 comm2->dst_buff_ != nullptr && comm1->dst_buff_ != comm2->src_buff_ && comm1->dst_buff_ != comm2->dst_buff_ &&
221 comm2->dst_buff_ != comm1->src_buff_)
227 void ActivityWaitSimcall::serialize(Simcall& type, std::stringstream& stream)
229 if (auto* comm = dynamic_cast<activity::CommImpl*>(activity_)) {
230 type = Simcall::COMM_WAIT;
231 stream << (timeout_ > 0) << ' ' << comm;
232 stream << ' ' << (comm->src_actor_ != nullptr ? comm->src_actor_->get_pid() : -1);
233 stream << ' ' << (comm->dst_actor_ != nullptr ? comm->dst_actor_->get_pid() : -1);
234 stream << ' ' << comm->get_mailbox_id();
235 stream << ' ' << (void*)comm->src_buff_ << ' ' << (void*)comm->dst_buff_ << ' ' << comm->src_buff_size_;
237 type = Simcall::UNKNOWN;
242 std::string ActivityTestSimcall::to_string(int times_considered) const
244 std::string res = SimcallObserver::to_string(times_considered) + "Test ";
245 if (const auto* comm = dynamic_cast<activity::CommImpl*>(activity_)) {
246 if (comm->src_actor_.get() == nullptr || comm->dst_actor_.get() == nullptr) {
247 res += "FALSE(comm=";
248 res += XBT_LOG_ISENABLED(mc_observer, xbt_log_priority_verbose) ? xbt::string_printf("%p)", comm)
253 auto src = comm->src_actor_;
254 auto dst = comm->dst_actor_;
256 XBT_LOG_ISENABLED(mc_observer, xbt_log_priority_verbose) ? xbt::string_printf("%p", comm) : "(verbose only) ";
257 res += xbt::string_printf("[(%ld)%s (%s) ", src->get_pid(), src->get_host()->get_cname(), src->get_cname()) +
259 xbt::string_printf("(%ld)%s (%s)])", dst->get_pid(), dst->get_host()->get_cname(), dst->get_cname());
262 xbt_die("Only Comms are supported here for now");
266 std::string ActivityTestSimcall::dot_label(int times_considered) const
268 std::string res = SimcallObserver::dot_label(times_considered) + "Test ";
269 const auto* comm = dynamic_cast<activity::CommImpl*>(activity_);
270 if (comm && (comm->src_actor_.get() == nullptr || comm->dst_actor_.get() == nullptr)) {
278 bool ActivityWaitSimcall::is_enabled() const
280 /* FIXME: check also that src and dst processes are not suspended */
281 const auto* comm = dynamic_cast<activity::CommImpl*>(activity_);
283 xbt_die("Only Comms are supported here for now");
285 if (comm->src_timeout_ || comm->dst_timeout_) {
286 /* If it has a timeout it will be always be enabled (regardless of who declared the timeout),
287 * because even if the communication is not ready, it can timeout and won't block. */
288 if (_sg_mc_timeout == 1)
291 /* On the other hand if it hasn't a timeout, check if the comm is ready.*/
292 else if (comm->detached() && comm->src_actor_ == nullptr && comm->get_state() == activity::State::READY)
293 return (comm->dst_actor_ != nullptr);
294 return (comm->src_actor_ && comm->dst_actor_);
297 std::string ActivityWaitSimcall::dot_label(int times_considered) const
299 std::string res = SimcallObserver::dot_label(times_considered);
300 res += (times_considered == -1) ? "WaitTimeout " : "Wait ";
302 const auto* comm = dynamic_cast<activity::CommImpl*>(activity_);
304 auto src = comm->src_actor_;
305 auto dst = comm->dst_actor_;
306 res += " [(" + std::to_string(src ? src->get_pid() : 0) + ")";
307 res += "->(" + std::to_string(dst ? dst->get_pid() : 0) + ")]";
309 xbt_die("Only Comms are supported here for now");
313 std::string ActivityWaitanySimcall::dot_label(int times_considered) const
315 return SimcallObserver::dot_label(times_considered) +
316 xbt::string_printf("WaitAny [%d of %zu]", times_considered + 1, activities_.size());
319 bool ActivityWaitanySimcall::is_enabled() const
321 // FIXME: deal with other kind of activities (Exec and I/Os)
322 // FIXME: Can be factored with ActivityWaitSimcall::is_enabled()
323 const auto* comm = dynamic_cast<activity::CommImpl*>(activities_[next_value_]);
325 xbt_die("Only Comms are supported here for now");
326 if (comm->src_timeout_ || comm->dst_timeout_) {
327 /* If it has a timeout it will be always be enabled (regardless of who declared the timeout),
328 * because even if the communication is not ready, it can timeout and won't block. */
329 if (_sg_mc_timeout == 1)
332 /* On the other hand if it hasn't a timeout, check if the comm is ready.*/
333 else if (comm->detached() && comm->src_actor_ == nullptr && comm->get_state() == activity::State::READY)
334 return (comm->dst_actor_ != nullptr);
335 return (comm->src_actor_ && comm->dst_actor_);
338 int ActivityWaitanySimcall::get_max_consider() const
340 return static_cast<int>(activities_.size());
343 void ActivityWaitanySimcall::prepare(int times_considered)
345 next_value_ = times_considered;
348 void CommIsendSimcall::serialize(Simcall& type, std::stringstream& stream)
350 type = Simcall::ISEND;
351 stream << mbox_->get_id() << ' ' << (void*)src_buff_ << ' ' << src_buff_size_;
352 XBT_DEBUG("SendObserver mbox:%u buff:%p size:%zu", mbox_->get_id(), src_buff_, src_buff_size_);
355 void CommIrecvSimcall::serialize(Simcall& type, std::stringstream& stream)
357 type = Simcall::IRECV;
358 stream << mbox_->get_id() << dst_buff_;
362 } // namespace kernel
363 } // namespace simgrid