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 #ifndef SIMGRID_MC_SIMCALL_OBSERVER_HPP
7 #define SIMGRID_MC_SIMCALL_OBSERVER_HPP
9 #include "simgrid/forward.h"
10 #include "xbt/asserts.h"
11 #include "xbt/utility.hpp"
15 #define SIMCALL_SERIALIZATION_BUFFER_SIZE 2048
21 class SimcallObserver {
22 ActorImpl* const issuer_;
25 XBT_DECLARE_ENUM_CLASS(Simcall, UNKNOWN, RANDOM, ISEND, IRECV, COMM_WAIT, COMM_TEST);
27 explicit SimcallObserver(ActorImpl* issuer) : issuer_(issuer) {}
28 ActorImpl* get_issuer() const { return issuer_; }
29 /** Whether this transition can currently be taken without blocking.
31 * For example, a mutex_lock is not enabled when the mutex is not free.
32 * A comm_receive is not enabled before the corresponding send has been issued.
34 virtual bool is_enabled() const { return true; }
36 /** Returns the amount of time that this transition can be used.
38 * If it's 1 (as with send/wait), there is no need to fork the state space exploration on this point.
39 * If it's more than one (as with mc_random or waitany), we need to consider this transition several times to start
42 virtual int get_max_consider() const { return 1; }
44 /** Prepares the simcall to be used.
46 * For most simcalls, this does nothing. Once enabled, there is nothing to do to prepare a send().
48 * It is useful only for the simcalls that can be used several times, such as waitany() or random().
49 * For them, prepare() selects the right outcome for the time being considered.
51 * The first time a simcall is considered, times_considered is 0, not 1.
53 virtual void prepare(int times_considered)
54 { /* Nothing to do by default */
57 /** We need to save the observer of simcalls as they get executed to later compute their dependencies in classical
59 virtual SimcallObserver* clone() = 0;
61 /** Computes the dependency relation */
62 virtual bool depends(SimcallObserver* other);
64 /** Serialize to the given buffer */
65 virtual void serialize(Simcall& type, char* buffer) { type = Simcall::UNKNOWN; }
67 /** Some simcalls may only be observable under some conditions.
68 * Most simcalls are not visible from the MC because they don't have an observer at all. */
69 virtual bool is_visible() const { return true; }
70 virtual std::string dot_label(int times_considered) const = 0;
73 template <class T> class ResultingSimcall : public SimcallObserver {
77 ResultingSimcall() = default;
78 ResultingSimcall(ActorImpl* actor, T default_result) : SimcallObserver(actor), result_(default_result) {}
79 void set_result(T res) { result_ = res; }
80 T get_result() const { return result_; }
83 class RandomSimcall : public SimcallObserver {
89 RandomSimcall(ActorImpl* actor, int min, int max) : SimcallObserver(actor), min_(min), max_(max)
91 xbt_assert(min < max);
93 SimcallObserver* clone() override
95 auto res = new RandomSimcall(get_issuer(), min_, max_);
96 res->next_value_ = next_value_;
99 void serialize(Simcall& type, char* buffer) override;
100 int get_max_consider() const override;
101 void prepare(int times_considered) override;
102 std::string dot_label(int times_considered) const override;
103 int get_value() const { return next_value_; }
104 bool depends(SimcallObserver* other) override;
107 class MutexSimcall : public SimcallObserver {
108 activity::MutexImpl* const mutex_;
111 MutexSimcall(ActorImpl* actor, activity::MutexImpl* mutex) : SimcallObserver(actor), mutex_(mutex) {}
112 activity::MutexImpl* get_mutex() const { return mutex_; }
113 bool depends(SimcallObserver* other) override;
116 class MutexUnlockSimcall : public MutexSimcall {
117 using MutexSimcall::MutexSimcall;
120 SimcallObserver* clone() override { return new MutexUnlockSimcall(get_issuer(), get_mutex()); }
121 std::string dot_label(int times_considered) const override;
124 class MutexLockSimcall : public MutexSimcall {
125 const bool blocking_;
128 MutexLockSimcall(ActorImpl* actor, activity::MutexImpl* mutex, bool blocking = true)
129 : MutexSimcall(actor, mutex), blocking_(blocking)
132 SimcallObserver* clone() override { return new MutexLockSimcall(get_issuer(), get_mutex(), blocking_); }
133 bool is_enabled() const override;
134 std::string dot_label(int times_considered) const override;
137 class ConditionWaitSimcall : public ResultingSimcall<bool> {
138 activity::ConditionVariableImpl* const cond_;
139 activity::MutexImpl* const mutex_;
140 const double timeout_;
143 ConditionWaitSimcall(ActorImpl* actor, activity::ConditionVariableImpl* cond, activity::MutexImpl* mutex,
144 double timeout = -1.0)
145 : ResultingSimcall(actor, false), cond_(cond), mutex_(mutex), timeout_(timeout)
148 SimcallObserver* clone() override { return new ConditionWaitSimcall(get_issuer(), cond_, mutex_, timeout_); }
149 bool is_enabled() const override;
150 bool is_visible() const override { return false; }
151 std::string dot_label(int times_considered) const override;
152 activity::ConditionVariableImpl* get_cond() const { return cond_; }
153 activity::MutexImpl* get_mutex() const { return mutex_; }
154 double get_timeout() const { return timeout_; }
157 class SemAcquireSimcall : public ResultingSimcall<bool> {
158 activity::SemaphoreImpl* const sem_;
159 const double timeout_;
162 SemAcquireSimcall(ActorImpl* actor, activity::SemaphoreImpl* sem, double timeout = -1.0)
163 : ResultingSimcall(actor, false), sem_(sem), timeout_(timeout)
166 SimcallObserver* clone() override { return new SemAcquireSimcall(get_issuer(), sem_, timeout_); }
167 bool is_enabled() const override;
168 bool is_visible() const override { return false; }
169 std::string dot_label(int times_considered) const override;
170 activity::SemaphoreImpl* get_sem() const { return sem_; }
171 double get_timeout() const { return timeout_; }
174 class ActivityTestSimcall : public ResultingSimcall<bool> {
175 activity::ActivityImpl* const activity_;
178 ActivityTestSimcall(ActorImpl* actor, activity::ActivityImpl* activity)
179 : ResultingSimcall(actor, true), activity_(activity)
182 SimcallObserver* clone() override { return new ActivityTestSimcall(get_issuer(), activity_); }
183 bool is_visible() const override { return true; }
184 bool depends(SimcallObserver* other) override;
185 std::string dot_label(int times_considered) const override;
186 activity::ActivityImpl* get_activity() const { return activity_; }
189 class ActivityTestanySimcall : public ResultingSimcall<ssize_t> {
190 const std::vector<activity::ActivityImpl*>& activities_;
194 ActivityTestanySimcall(ActorImpl* actor, const std::vector<activity::ActivityImpl*>& activities)
195 : ResultingSimcall(actor, -1), activities_(activities)
198 SimcallObserver* clone() override { return new ActivityTestanySimcall(get_issuer(), activities_); }
199 bool is_visible() const override { return true; }
200 int get_max_consider() const override;
201 void prepare(int times_considered) override;
202 std::string dot_label(int times_considered) const override;
203 const std::vector<activity::ActivityImpl*>& get_activities() const { return activities_; }
204 int get_value() const { return next_value_; }
207 class ActivityWaitSimcall : public ResultingSimcall<bool> {
208 activity::ActivityImpl* activity_;
209 const double timeout_;
212 ActivityWaitSimcall(ActorImpl* actor, activity::ActivityImpl* activity, double timeout)
213 : ResultingSimcall(actor, false), activity_(activity), timeout_(timeout)
216 SimcallObserver* clone() override { return new ActivityWaitSimcall(get_issuer(), activity_, timeout_); }
217 void serialize(Simcall& type, char* buffer) override;
218 bool is_visible() const override { return true; }
219 bool is_enabled() const override;
220 std::string dot_label(int times_considered) const override;
221 activity::ActivityImpl* get_activity() const { return activity_; }
222 void set_activity(activity::ActivityImpl* activity) { activity_ = activity; }
223 double get_timeout() const { return timeout_; }
226 class ActivityWaitanySimcall : public ResultingSimcall<ssize_t> {
227 const std::vector<activity::ActivityImpl*>& activities_;
228 const double timeout_;
232 ActivityWaitanySimcall(ActorImpl* actor, const std::vector<activity::ActivityImpl*>& activities, double timeout)
233 : ResultingSimcall(actor, -1), activities_(activities), timeout_(timeout)
236 SimcallObserver* clone() override { return new ActivityWaitanySimcall(get_issuer(), activities_, timeout_); }
237 bool is_enabled() const override;
238 bool is_visible() const override { return true; }
239 void prepare(int times_considered) override;
240 int get_max_consider() const override;
241 std::string dot_label(int times_considered) const override;
242 const std::vector<activity::ActivityImpl*>& get_activities() const { return activities_; }
243 double get_timeout() const { return timeout_; }
244 int get_value() const { return next_value_; }
247 class CommIsendSimcall : public SimcallObserver {
248 activity::MailboxImpl* mbox_;
249 double payload_size_;
251 unsigned char* src_buff_;
252 size_t src_buff_size_;
257 bool (*match_fun_)(void*, void*, activity::CommImpl*);
258 void (*clean_fun_)(void*); // used to free the synchro in case of problem after a detached send
259 void (*copy_data_fun_)(activity::CommImpl*, void*, size_t); // used to copy data if not default one
261 CommIsendSimcall(ActorImpl* actor, activity::MailboxImpl* mbox, double payload_size, double rate,
262 unsigned char* src_buff, size_t src_buff_size, bool (*match_fun)(void*, void*, activity::CommImpl*),
263 void (*clean_fun)(void*), // used to free the synchro in case of problem after a detached send
264 void (*copy_data_fun)(activity::CommImpl*, void*, size_t), // used to copy data if not default one
265 void* payload, bool detached)
266 : SimcallObserver(actor)
268 , payload_size_(payload_size)
270 , src_buff_(src_buff)
271 , src_buff_size_(src_buff_size)
273 , detached_(detached)
274 , match_fun_(match_fun)
275 , clean_fun_(clean_fun)
276 , copy_data_fun_(copy_data_fun)
279 void serialize(Simcall& type, char* buffer) override;
280 CommIsendSimcall* clone() override
282 return new CommIsendSimcall(get_issuer(), mbox_, payload_size_, rate_, src_buff_, src_buff_size_, match_fun_,
283 clean_fun_, copy_data_fun_, payload_, detached_);
285 bool is_visible() const override { return true; }
286 std::string dot_label(int times_considered) const override
288 return SimcallObserver::dot_label(times_considered) + "iSend";
290 activity::MailboxImpl* get_mailbox() const { return mbox_; }
291 double get_payload_size() const { return payload_size_; }
292 double get_rate() const { return rate_; }
293 unsigned char* get_src_buff() const { return src_buff_; }
294 size_t get_src_buff_size() const { return src_buff_size_; }
295 void* get_payload() const { return payload_; }
296 bool is_detached() const { return detached_; }
299 class CommIrecvSimcall : public SimcallObserver {
300 activity::MailboxImpl* mbox_;
301 unsigned char* dst_buff_;
302 size_t* dst_buff_size_;
307 bool (*match_fun_)(void*, void*, activity::CommImpl*);
308 void (*copy_data_fun_)(activity::CommImpl*, void*, size_t); // used to copy data if not default one
310 CommIrecvSimcall(ActorImpl* actor, activity::MailboxImpl* mbox, unsigned char* dst_buff, size_t* dst_buff_size,
311 bool (*match_fun)(void*, void*, activity::CommImpl*),
312 void (*copy_data_fun)(activity::CommImpl*, void*, size_t), void* payload, double rate)
313 : SimcallObserver(actor)
315 , dst_buff_(dst_buff)
316 , dst_buff_size_(dst_buff_size)
319 , match_fun_(match_fun)
320 , copy_data_fun_(copy_data_fun)
323 CommIrecvSimcall* clone() override
325 return new CommIrecvSimcall(get_issuer(), mbox_, dst_buff_, dst_buff_size_, match_fun_, copy_data_fun_, payload_,
328 void serialize(Simcall& type, char* buffer) override;
329 bool is_visible() const override { return true; }
330 std::string dot_label(int times_considered) const override
332 return SimcallObserver::dot_label(times_considered) + "iRecv";
334 activity::MailboxImpl* get_mailbox() const { return mbox_; }
335 double get_rate() const { return rate_; }
336 unsigned char* get_dst_buff() const { return dst_buff_; }
337 size_t* get_dst_buff_size() const { return dst_buff_size_; }
338 void* get_payload() const { return payload_; }
342 } // namespace kernel
343 } // namespace simgrid