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 bool MutexSimcall::depends(SimcallObserver* other)
33 if (dynamic_cast<RandomSimcall*>(other) != nullptr)
34 return other->depends(this); /* Other is random, that is very permissive. Use that relation instead. */
36 #if 0 /* This code is currently broken and shouldn't be used. We must implement asynchronous locks before */
37 MutexSimcall* that = dynamic_cast<MutexSimcall*>(other);
39 return true; // Depends on anything we don't know
41 /* Theorem 4.4.7: Any pair of synchronization actions of distinct actors concerning distinct mutexes are independent */
42 if (this->get_issuer() != that->get_issuer() && this->get_mutex() != that->get_mutex())
45 /* Theorem 4.4.8 An AsyncMutexLock is independent with a MutexUnlock of another actor */
46 if (((dynamic_cast<MutexLockSimcall*>(this) != nullptr && dynamic_cast<MutexUnlockSimcall*>(that)) ||
47 (dynamic_cast<MutexLockSimcall*>(that) != nullptr && dynamic_cast<MutexUnlockSimcall*>(this))) &&
48 get_issuer() != other->get_issuer())
51 return true; // Depend on things we don't know for sure that they are independent
55 std::string SimcallObserver::to_string(int) const
57 return simgrid::xbt::string_printf("[(%ld)%s (%s)] ", issuer_->get_pid(), issuer_->get_host()->get_cname(),
58 issuer_->get_cname());
61 std::string SimcallObserver::dot_label(int /*times_considered*/) const
63 if (issuer_->get_host())
64 return xbt::string_printf("[(%ld)%s] ", issuer_->get_pid(), issuer_->get_host()->get_cname());
65 return xbt::string_printf("[(%ld)] ", issuer_->get_pid());
68 std::string RandomSimcall::dot_label(int times_considered) const
70 return SimcallObserver::dot_label(times_considered) + "MC_RANDOM(" + std::to_string(next_value_) + ")";
73 void RandomSimcall::prepare(int times_considered)
75 next_value_ = min_ + times_considered;
76 XBT_DEBUG("MC_RANDOM(%d, %d) will return %d after %d times", min_, max_, next_value_, times_considered);
79 int RandomSimcall::get_max_consider() const
81 return max_ - min_ + 1;
84 std::string MutexUnlockSimcall::dot_label(int times_considered) const
86 return SimcallObserver::dot_label(times_considered) + "Mutex UNLOCK";
90 std::string MutexLockSimcall::to_string(int times_considered) const
92 auto mutex = get_mutex();
93 std::string res = SimcallObserver::to_string(times_considered) + (blocking_ ? "Mutex LOCK" : "Mutex TRYLOCK");
94 res += "(locked = " + std::to_string(mutex->is_locked());
95 res += ", owner = " + std::to_string(mutex->get_owner() ? mutex->get_owner()->get_pid() : -1);
96 res += ", sleeping = n/a)";
100 std::string MutexLockSimcall::dot_label(int times_considered) const
102 return SimcallObserver::dot_label(times_considered) + (blocking_ ? "Mutex LOCK" : "Mutex TRYLOCK");
105 bool MutexLockSimcall::is_enabled() const
107 return not blocking_ || get_mutex()->get_owner() == nullptr || get_mutex()->get_owner() == get_issuer();
110 std::string ConditionWaitSimcall::dot_label(int times_considered) const
112 return SimcallObserver::dot_label(times_considered) + "Condition WAIT";
115 bool ConditionWaitSimcall::is_enabled() const
117 static bool warned = false;
119 XBT_INFO("Using condition variables in model-checked code is still experimental. Use at your own risk");
125 std::string SemAcquireSimcall::dot_label(int times_considered) const
127 return SimcallObserver::dot_label(times_considered) + "Sem ACQUIRE";
130 bool SemAcquireSimcall::is_enabled() const
132 static bool warned = false;
134 XBT_INFO("Using semaphore in model-checked code is still experimental. Use at your own risk");
140 int ActivityTestanySimcall::get_max_consider() const
142 // Only Comms are of interest to MC for now. When all types of activities can be consider, this function can simply
143 // return the size of activities_.
145 for (const auto& act : activities_)
146 if (dynamic_cast<activity::CommImpl*>(act) != nullptr)
151 void ActivityTestanySimcall::prepare(int times_considered)
153 next_value_ = times_considered;
157 std::string ActivityTestanySimcall::to_string(int times_considered) const
159 std::string res = SimcallObserver::to_string(times_considered);
160 if (times_considered == -1) {
161 res += "TestAny FALSE(-)";
163 res += "TestAny(" + xbt::string_printf("(%d of %zu)", times_considered + 1, activities_.size());
169 std::string ActivityTestanySimcall::dot_label(int times_considered) const
171 std::string res = SimcallObserver::dot_label(times_considered) + "TestAny ";
172 if (times_considered == -1) {
175 res += xbt::string_printf("TRUE [%d of %zu]", times_considered + 1, activities_.size());
180 bool ActivityTestSimcall::depends(SimcallObserver* other)
182 if (get_issuer() == other->get_issuer())
185 if (dynamic_cast<ActivityTestSimcall*>(other))
188 const auto* comm1 = dynamic_cast<activity::CommImpl*>(activity_);
189 if (comm1 == nullptr)
192 if (dynamic_cast<ActivityWaitSimcall*>(other) != nullptr &&
193 (comm1->src_actor_.get() == nullptr || comm1->dst_actor_.get() == nullptr))
196 if (comm1->src_buff_ == nullptr || comm1->dst_buff_ == nullptr)
199 if (const auto* test = dynamic_cast<ActivityTestSimcall*>(other)) {
200 const auto* comm2 = dynamic_cast<activity::CommImpl*>(test->get_activity());
201 if (comm2 == nullptr)
203 else if (comm2->src_buff_ == nullptr || comm2->dst_buff_ == nullptr)
207 if (auto* wait = dynamic_cast<ActivityWaitSimcall*>(other)) {
208 auto* comm2 = dynamic_cast<activity::CommImpl*>(wait->get_activity());
209 if (comm2 == nullptr)
211 if (comm1->src_buff_ == comm2->src_buff_ && comm1->dst_buff_ == comm2->dst_buff_)
213 if (comm1->src_buff_ != nullptr && comm1->dst_buff_ != nullptr && comm2->src_buff_ != nullptr &&
214 comm2->dst_buff_ != nullptr && comm1->dst_buff_ != comm2->src_buff_ && comm1->dst_buff_ != comm2->dst_buff_ &&
215 comm2->dst_buff_ != comm1->src_buff_)
221 void ActivityWaitSimcall::serialize(Simcall& type, char* buffer)
223 std::stringstream stream;
224 if (auto* comm = dynamic_cast<activity::CommImpl*>(activity_)) {
225 type = Simcall::COMM_WAIT;
226 stream << timeout_ << ' ' << comm;
227 stream << ' ' << (comm->src_actor_ != nullptr ? comm->src_actor_->get_pid() : -1);
228 stream << ' ' << (comm->dst_actor_ != nullptr ? comm->dst_actor_->get_pid() : -1);
229 stream << ' ' << (comm->get_mailbox() != nullptr ? comm->get_mailbox()->get_id() : 666);
230 stream << ' ' << (void*)comm->src_buff_ << ' ' << (void*)comm->dst_buff_ << ' ' << comm->src_buff_size_;
231 strcpy(buffer, stream.str().c_str());
233 type = Simcall::UNKNOWN;
234 strcpy(buffer, stream.str().c_str());
239 std::string ActivityTestSimcall::to_string(int times_considered) const
241 std::string res = SimcallObserver::to_string(times_considered) + "Test ";
242 if (const auto* comm = dynamic_cast<activity::CommImpl*>(activity_)) {
243 if (comm->src_actor_.get() == nullptr || comm->dst_actor_.get() == nullptr) {
244 res += "FALSE(comm=";
245 res += XBT_LOG_ISENABLED(mc_observer, xbt_log_priority_verbose) ? xbt::string_printf("%p)", comm)
250 auto src = comm->src_actor_;
251 auto dst = comm->dst_actor_;
253 XBT_LOG_ISENABLED(mc_observer, xbt_log_priority_verbose) ? xbt::string_printf("%p", comm) : "(verbose only) ";
254 res += xbt::string_printf("[(%ld)%s (%s) ", src->get_pid(), src->get_host()->get_cname(), src->get_cname()) +
256 xbt::string_printf("(%ld)%s (%s)])", dst->get_pid(), dst->get_host()->get_cname(), dst->get_cname());
259 xbt_die("Only Comms are supported here for now");
263 std::string ActivityTestSimcall::dot_label(int times_considered) const
265 std::string res = SimcallObserver::dot_label(times_considered) + "Test ";
266 const auto* comm = dynamic_cast<activity::CommImpl*>(activity_);
267 if (comm && (comm->src_actor_.get() == nullptr || comm->dst_actor_.get() == nullptr)) {
275 bool ActivityWaitSimcall::is_enabled() const
277 /* FIXME: check also that src and dst processes are not suspended */
278 const auto* comm = dynamic_cast<activity::CommImpl*>(activity_);
280 xbt_die("Only Comms are supported here for now");
282 if (comm->src_timeout_ || comm->dst_timeout_) {
283 /* If it has a timeout it will be always be enabled (regardless of who declared the timeout),
284 * because even if the communication is not ready, it can timeout and won't block. */
285 if (_sg_mc_timeout == 1)
288 /* On the other hand if it hasn't a timeout, check if the comm is ready.*/
289 else if (comm->detached() && comm->src_actor_ == nullptr && comm->get_state() == activity::State::READY)
290 return (comm->dst_actor_ != nullptr);
291 return (comm->src_actor_ && comm->dst_actor_);
294 std::string ActivityWaitSimcall::dot_label(int times_considered) const
296 std::string res = SimcallObserver::dot_label(times_considered);
297 res += (times_considered == -1) ? "WaitTimeout " : "Wait ";
299 const auto* comm = dynamic_cast<activity::CommImpl*>(activity_);
301 auto src = comm->src_actor_;
302 auto dst = comm->dst_actor_;
303 res += " [(" + std::to_string(src ? src->get_pid() : 0) + ")";
304 res += "->(" + std::to_string(dst ? dst->get_pid() : 0) + ")]";
306 xbt_die("Only Comms are supported here for now");
310 std::string ActivityWaitanySimcall::dot_label(int times_considered) const
312 return SimcallObserver::dot_label(times_considered) +
313 xbt::string_printf("WaitAny [%d of %zu]", times_considered + 1, activities_.size());
316 bool ActivityWaitanySimcall::is_enabled() const
318 // FIXME: deal with other kind of activities (Exec and I/Os)
319 // FIXME: Can be factored with ActivityWaitSimcall::is_enabled()
320 const auto* comm = dynamic_cast<activity::CommImpl*>(activities_[next_value_]);
322 xbt_die("Only Comms are supported here for now");
323 if (comm->src_timeout_ || comm->dst_timeout_) {
324 /* If it has a timeout it will be always be enabled (regardless of who declared the timeout),
325 * because even if the communication is not ready, it can timeout and won't block. */
326 if (_sg_mc_timeout == 1)
329 /* On the other hand if it hasn't a timeout, check if the comm is ready.*/
330 else if (comm->detached() && comm->src_actor_ == nullptr && comm->get_state() == activity::State::READY)
331 return (comm->dst_actor_ != nullptr);
332 return (comm->src_actor_ && comm->dst_actor_);
335 int ActivityWaitanySimcall::get_max_consider() const
337 return static_cast<int>(activities_.size());
340 void ActivityWaitanySimcall::prepare(int times_considered)
342 next_value_ = times_considered;
345 void CommIsendSimcall::serialize(Simcall& type, char* buffer)
347 type = Simcall::ISEND;
348 std::stringstream stream;
349 stream << mbox_->get_id() << ' ' << (void*)src_buff_ << ' ' << src_buff_size_;
350 strcpy(buffer, stream.str().c_str());
353 void CommIrecvSimcall::serialize(Simcall& type, char* buffer)
355 type = Simcall::IRECV;
356 std::stringstream stream;
357 stream << mbox_->get_id() << dst_buff_;
358 strcpy(buffer, stream.str().c_str());
363 std::string CommIrecvSimcall::to_string(int times_considered) const
365 std::string res = SimcallObserver::to_string(times_considered) + "iRecv(";
366 res += xbt::string_printf("dst=(%ld)%s (%s)", get_issuer()->get_pid(), get_issuer()->get_host()->get_cname(),
367 get_issuer()->get_cname());
368 res += ", buff=" + (XBT_LOG_ISENABLED(mc_observer, xbt_log_priority_verbose) ? xbt::string_printf("%p", dst_buff_)
370 res += ", size=" + (XBT_LOG_ISENABLED(mc_observer, xbt_log_priority_verbose) ? std::to_string(*dst_buff_size_)
378 } // namespace kernel
379 } // namespace simgrid