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, char* buffer)
33 type = Simcall::RANDOM;
34 std::stringstream stream;
36 stream << min_ << ' ' << max_;
37 strcpy(buffer, stream.str().c_str());
40 bool MutexSimcall::depends(SimcallObserver* other)
42 if (dynamic_cast<RandomSimcall*>(other) != nullptr)
43 return other->depends(this); /* Other is random, that is very permissive. Use that relation instead. */
45 #if 0 /* This code is currently broken and shouldn't be used. We must implement asynchronous locks before */
46 MutexSimcall* that = dynamic_cast<MutexSimcall*>(other);
48 return true; // Depends on anything we don't know
50 /* Theorem 4.4.7: Any pair of synchronization actions of distinct actors concerning distinct mutexes are independent */
51 if (this->get_issuer() != that->get_issuer() && this->get_mutex() != that->get_mutex())
54 /* Theorem 4.4.8 An AsyncMutexLock is independent with a MutexUnlock of another actor */
55 if (((dynamic_cast<MutexLockSimcall*>(this) != nullptr && dynamic_cast<MutexUnlockSimcall*>(that)) ||
56 (dynamic_cast<MutexLockSimcall*>(that) != nullptr && dynamic_cast<MutexUnlockSimcall*>(this))) &&
57 get_issuer() != other->get_issuer())
60 return true; // Depend on things we don't know for sure that they are independent
64 std::string SimcallObserver::to_string(int) const
66 return simgrid::xbt::string_printf("[(%ld)%s (%s)] ", issuer_->get_pid(), issuer_->get_host()->get_cname(),
67 issuer_->get_cname());
70 std::string SimcallObserver::dot_label(int /*times_considered*/) const
72 if (issuer_->get_host())
73 return xbt::string_printf("[(%ld)%s] ", issuer_->get_pid(), issuer_->get_host()->get_cname());
74 return xbt::string_printf("[(%ld)] ", issuer_->get_pid());
77 std::string RandomSimcall::dot_label(int times_considered) const
79 return SimcallObserver::dot_label(times_considered) + "MC_RANDOM(" + std::to_string(next_value_) + ")";
82 void RandomSimcall::prepare(int times_considered)
84 next_value_ = min_ + times_considered;
85 XBT_DEBUG("MC_RANDOM(%d, %d) will return %d after %d times", min_, max_, next_value_, times_considered);
88 int RandomSimcall::get_max_consider() const
90 return max_ - min_ + 1;
93 std::string MutexUnlockSimcall::dot_label(int times_considered) const
95 return SimcallObserver::dot_label(times_considered) + "Mutex UNLOCK";
99 std::string MutexLockSimcall::to_string(int times_considered) const
101 auto mutex = get_mutex();
102 std::string res = SimcallObserver::to_string(times_considered) + (blocking_ ? "Mutex LOCK" : "Mutex TRYLOCK");
103 res += "(locked = " + std::to_string(mutex->is_locked());
104 res += ", owner = " + std::to_string(mutex->get_owner() ? mutex->get_owner()->get_pid() : -1);
105 res += ", sleeping = n/a)";
109 std::string MutexLockSimcall::dot_label(int times_considered) const
111 return SimcallObserver::dot_label(times_considered) + (blocking_ ? "Mutex LOCK" : "Mutex TRYLOCK");
114 bool MutexLockSimcall::is_enabled() const
116 return not blocking_ || get_mutex()->get_owner() == nullptr || get_mutex()->get_owner() == get_issuer();
119 std::string ConditionWaitSimcall::dot_label(int times_considered) const
121 return SimcallObserver::dot_label(times_considered) + "Condition WAIT";
124 bool ConditionWaitSimcall::is_enabled() const
126 static bool warned = false;
128 XBT_INFO("Using condition variables in model-checked code is still experimental. Use at your own risk");
134 std::string SemAcquireSimcall::dot_label(int times_considered) const
136 return SimcallObserver::dot_label(times_considered) + "Sem ACQUIRE";
139 bool SemAcquireSimcall::is_enabled() const
141 static bool warned = false;
143 XBT_INFO("Using semaphore in model-checked code is still experimental. Use at your own risk");
149 int ActivityTestanySimcall::get_max_consider() const
151 // Only Comms are of interest to MC for now. When all types of activities can be consider, this function can simply
152 // return the size of activities_.
154 for (const auto& act : activities_)
155 if (dynamic_cast<activity::CommImpl*>(act) != nullptr)
160 void ActivityTestanySimcall::prepare(int times_considered)
162 next_value_ = times_considered;
166 std::string ActivityTestanySimcall::to_string(int times_considered) const
168 std::string res = SimcallObserver::to_string(times_considered);
169 if (times_considered == -1) {
170 res += "TestAny FALSE(-)";
172 res += "TestAny(" + xbt::string_printf("(%d of %zu)", times_considered + 1, activities_.size());
178 std::string ActivityTestanySimcall::dot_label(int times_considered) const
180 std::string res = SimcallObserver::dot_label(times_considered) + "TestAny ";
181 if (times_considered == -1) {
184 res += xbt::string_printf("TRUE [%d of %zu]", times_considered + 1, activities_.size());
189 bool ActivityTestSimcall::depends(SimcallObserver* other)
191 if (get_issuer() == other->get_issuer())
194 if (dynamic_cast<ActivityTestSimcall*>(other))
197 const auto* comm1 = dynamic_cast<activity::CommImpl*>(activity_);
198 if (comm1 == nullptr)
201 if (dynamic_cast<ActivityWaitSimcall*>(other) != nullptr &&
202 (comm1->src_actor_.get() == nullptr || comm1->dst_actor_.get() == nullptr))
205 if (comm1->src_buff_ == nullptr || comm1->dst_buff_ == nullptr)
208 if (const auto* test = dynamic_cast<ActivityTestSimcall*>(other)) {
209 const auto* comm2 = dynamic_cast<activity::CommImpl*>(test->get_activity());
210 if (comm2 == nullptr)
212 else if (comm2->src_buff_ == nullptr || comm2->dst_buff_ == nullptr)
216 if (auto* wait = dynamic_cast<ActivityWaitSimcall*>(other)) {
217 auto* comm2 = dynamic_cast<activity::CommImpl*>(wait->get_activity());
218 if (comm2 == nullptr)
220 if (comm1->src_buff_ == comm2->src_buff_ && comm1->dst_buff_ == comm2->dst_buff_)
222 if (comm1->src_buff_ != nullptr && comm1->dst_buff_ != nullptr && comm2->src_buff_ != nullptr &&
223 comm2->dst_buff_ != nullptr && comm1->dst_buff_ != comm2->src_buff_ && comm1->dst_buff_ != comm2->dst_buff_ &&
224 comm2->dst_buff_ != comm1->src_buff_)
230 void ActivityWaitSimcall::serialize(Simcall& type, char* buffer)
232 std::stringstream stream;
233 if (auto* comm = dynamic_cast<activity::CommImpl*>(activity_)) {
234 type = Simcall::COMM_WAIT;
235 stream << (timeout_ > 0) << ' ' << comm;
236 stream << ' ' << (comm->src_actor_ != nullptr ? comm->src_actor_->get_pid() : -1);
237 stream << ' ' << (comm->dst_actor_ != nullptr ? comm->dst_actor_->get_pid() : -1);
238 stream << ' ' << comm->get_mailbox_id();
239 stream << ' ' << (void*)comm->src_buff_ << ' ' << (void*)comm->dst_buff_ << ' ' << comm->src_buff_size_;
240 strcpy(buffer, stream.str().c_str());
242 type = Simcall::UNKNOWN;
243 strcpy(buffer, stream.str().c_str());
248 std::string ActivityTestSimcall::to_string(int times_considered) const
250 std::string res = SimcallObserver::to_string(times_considered) + "Test ";
251 if (const auto* comm = dynamic_cast<activity::CommImpl*>(activity_)) {
252 if (comm->src_actor_.get() == nullptr || comm->dst_actor_.get() == nullptr) {
253 res += "FALSE(comm=";
254 res += XBT_LOG_ISENABLED(mc_observer, xbt_log_priority_verbose) ? xbt::string_printf("%p)", comm)
259 auto src = comm->src_actor_;
260 auto dst = comm->dst_actor_;
262 XBT_LOG_ISENABLED(mc_observer, xbt_log_priority_verbose) ? xbt::string_printf("%p", comm) : "(verbose only) ";
263 res += xbt::string_printf("[(%ld)%s (%s) ", src->get_pid(), src->get_host()->get_cname(), src->get_cname()) +
265 xbt::string_printf("(%ld)%s (%s)])", dst->get_pid(), dst->get_host()->get_cname(), dst->get_cname());
268 xbt_die("Only Comms are supported here for now");
272 std::string ActivityTestSimcall::dot_label(int times_considered) const
274 std::string res = SimcallObserver::dot_label(times_considered) + "Test ";
275 const auto* comm = dynamic_cast<activity::CommImpl*>(activity_);
276 if (comm && (comm->src_actor_.get() == nullptr || comm->dst_actor_.get() == nullptr)) {
284 bool ActivityWaitSimcall::is_enabled() const
286 /* FIXME: check also that src and dst processes are not suspended */
287 const auto* comm = dynamic_cast<activity::CommImpl*>(activity_);
289 xbt_die("Only Comms are supported here for now");
291 if (comm->src_timeout_ || comm->dst_timeout_) {
292 /* If it has a timeout it will be always be enabled (regardless of who declared the timeout),
293 * because even if the communication is not ready, it can timeout and won't block. */
294 if (_sg_mc_timeout == 1)
297 /* On the other hand if it hasn't a timeout, check if the comm is ready.*/
298 else if (comm->detached() && comm->src_actor_ == nullptr && comm->get_state() == activity::State::READY)
299 return (comm->dst_actor_ != nullptr);
300 return (comm->src_actor_ && comm->dst_actor_);
303 std::string ActivityWaitSimcall::dot_label(int times_considered) const
305 std::string res = SimcallObserver::dot_label(times_considered);
306 res += (times_considered == -1) ? "WaitTimeout " : "Wait ";
308 const auto* comm = dynamic_cast<activity::CommImpl*>(activity_);
310 auto src = comm->src_actor_;
311 auto dst = comm->dst_actor_;
312 res += " [(" + std::to_string(src ? src->get_pid() : 0) + ")";
313 res += "->(" + std::to_string(dst ? dst->get_pid() : 0) + ")]";
315 xbt_die("Only Comms are supported here for now");
319 std::string ActivityWaitanySimcall::dot_label(int times_considered) const
321 return SimcallObserver::dot_label(times_considered) +
322 xbt::string_printf("WaitAny [%d of %zu]", times_considered + 1, activities_.size());
325 bool ActivityWaitanySimcall::is_enabled() const
327 // FIXME: deal with other kind of activities (Exec and I/Os)
328 // FIXME: Can be factored with ActivityWaitSimcall::is_enabled()
329 const auto* comm = dynamic_cast<activity::CommImpl*>(activities_[next_value_]);
331 xbt_die("Only Comms are supported here for now");
332 if (comm->src_timeout_ || comm->dst_timeout_) {
333 /* If it has a timeout it will be always be enabled (regardless of who declared the timeout),
334 * because even if the communication is not ready, it can timeout and won't block. */
335 if (_sg_mc_timeout == 1)
338 /* On the other hand if it hasn't a timeout, check if the comm is ready.*/
339 else if (comm->detached() && comm->src_actor_ == nullptr && comm->get_state() == activity::State::READY)
340 return (comm->dst_actor_ != nullptr);
341 return (comm->src_actor_ && comm->dst_actor_);
344 int ActivityWaitanySimcall::get_max_consider() const
346 return static_cast<int>(activities_.size());
349 void ActivityWaitanySimcall::prepare(int times_considered)
351 next_value_ = times_considered;
354 void CommIsendSimcall::serialize(Simcall& type, char* buffer)
356 type = Simcall::ISEND;
357 std::stringstream stream;
358 stream << mbox_->get_id() << ' ' << (void*)src_buff_ << ' ' << src_buff_size_;
359 strcpy(buffer, stream.str().c_str());
360 XBT_DEBUG("SendObserver mbox:%u buff:%p size:%zu", mbox_->get_id(), src_buff_, src_buff_size_);
363 void CommIrecvSimcall::serialize(Simcall& type, char* buffer)
365 type = Simcall::IRECV;
366 std::stringstream stream;
367 stream << mbox_->get_id() << dst_buff_;
368 strcpy(buffer, stream.str().c_str());
373 std::string CommIrecvSimcall::to_string(int times_considered) const
375 std::string res = SimcallObserver::to_string(times_considered) + "iRecv(";
376 res += xbt::string_printf("dst=(%ld)%s (%s)", get_issuer()->get_pid(), get_issuer()->get_host()->get_cname(),
377 get_issuer()->get_cname());
378 res += ", buff=" + (XBT_LOG_ISENABLED(mc_observer, xbt_log_priority_verbose) ? xbt::string_printf("%p", dst_buff_)
380 res += ", size=" + (XBT_LOG_ISENABLED(mc_observer, xbt_log_priority_verbose) ? std::to_string(*dst_buff_size_)
388 } // namespace kernel
389 } // namespace simgrid