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 "src/mc/api/Transition.hpp"
11 #include "xbt/asserts.h"
19 class SimcallObserver {
20 ActorImpl* const issuer_;
23 explicit SimcallObserver(ActorImpl* issuer) : issuer_(issuer) {}
24 ActorImpl* get_issuer() const { return issuer_; }
25 /** Whether this transition can currently be taken without blocking.
27 * For example, a mutex_lock is not enabled when the mutex is not free.
28 * A comm_receive is not enabled before the corresponding send has been issued.
30 virtual bool is_enabled() const { return true; }
32 /** Returns the amount of time that this transition can be used.
34 * If it's 1 (as with send/wait), there is no need to fork the state space exploration on this point.
35 * If it's more than one (as with mc_random or waitany), we need to consider this transition several times to start
38 virtual int get_max_consider() const { return 1; }
40 /** Prepares the simcall to be used.
42 * For most simcalls, this does nothing. Once enabled, there is nothing to do to prepare a send().
44 * It is useful only for the simcalls that can be used several times, such as waitany() or random().
45 * For them, prepare() selects the right outcome for the time being considered.
47 * The first time a simcall is considered, times_considered is 0, not 1.
49 virtual void prepare(int times_considered)
50 { /* Nothing to do by default */
53 /** Computes the dependency relation */
54 virtual bool depends(SimcallObserver* other);
56 /** Serialize to the given string buffer */
57 virtual void serialize(mc::Transition::Type& type, std::stringstream& stream)
59 type = mc::Transition::Type::UNKNOWN;
62 /** Some simcalls may only be observable under some conditions.
63 * Most simcalls are not visible from the MC because they don't have an observer at all. */
64 virtual bool is_visible() const { return true; }
67 template <class T> class ResultingSimcall : public SimcallObserver {
71 ResultingSimcall() = default;
72 ResultingSimcall(ActorImpl* actor, T default_result) : SimcallObserver(actor), result_(default_result) {}
73 void set_result(T res) { result_ = res; }
74 T get_result() const { return result_; }
77 class RandomSimcall : public SimcallObserver {
83 RandomSimcall(ActorImpl* actor, int min, int max) : SimcallObserver(actor), min_(min), max_(max)
85 xbt_assert(min < max);
87 void serialize(mc::Transition::Type& type, std::stringstream& stream) override;
88 int get_max_consider() const override;
89 void prepare(int times_considered) override;
90 int get_value() const { return next_value_; }
91 bool depends(SimcallObserver* other) override;
94 class MutexSimcall : public SimcallObserver {
95 activity::MutexImpl* const mutex_;
98 MutexSimcall(ActorImpl* actor, activity::MutexImpl* mutex) : SimcallObserver(actor), mutex_(mutex) {}
99 activity::MutexImpl* get_mutex() const { return mutex_; }
100 bool depends(SimcallObserver* other) override;
103 class MutexUnlockSimcall : public MutexSimcall {
104 using MutexSimcall::MutexSimcall;
107 class MutexLockSimcall : public MutexSimcall {
108 const bool blocking_;
111 MutexLockSimcall(ActorImpl* actor, activity::MutexImpl* mutex, bool blocking = true)
112 : MutexSimcall(actor, mutex), blocking_(blocking)
115 bool is_enabled() const override;
118 class ConditionWaitSimcall : public ResultingSimcall<bool> {
119 activity::ConditionVariableImpl* const cond_;
120 activity::MutexImpl* const mutex_;
121 const double timeout_;
124 ConditionWaitSimcall(ActorImpl* actor, activity::ConditionVariableImpl* cond, activity::MutexImpl* mutex,
125 double timeout = -1.0)
126 : ResultingSimcall(actor, false), cond_(cond), mutex_(mutex), timeout_(timeout)
129 bool is_enabled() const override;
130 bool is_visible() const override { return false; }
131 activity::ConditionVariableImpl* get_cond() const { return cond_; }
132 activity::MutexImpl* get_mutex() const { return mutex_; }
133 double get_timeout() const { return timeout_; }
136 class SemAcquireSimcall : public ResultingSimcall<bool> {
137 activity::SemaphoreImpl* const sem_;
138 const double timeout_;
141 SemAcquireSimcall(ActorImpl* actor, activity::SemaphoreImpl* sem, double timeout = -1.0)
142 : ResultingSimcall(actor, false), sem_(sem), timeout_(timeout)
145 bool is_enabled() const override;
146 bool is_visible() const override { return false; }
147 activity::SemaphoreImpl* get_sem() const { return sem_; }
148 double get_timeout() const { return timeout_; }
151 class ActivityTestSimcall : public ResultingSimcall<bool> {
152 activity::ActivityImpl* const activity_;
155 ActivityTestSimcall(ActorImpl* actor, activity::ActivityImpl* activity)
156 : ResultingSimcall(actor, true), activity_(activity)
159 bool is_visible() const override { return true; }
160 activity::ActivityImpl* get_activity() const { return activity_; }
161 void serialize(mc::Transition::Type& type, std::stringstream& stream) override;
164 class ActivityTestanySimcall : public ResultingSimcall<ssize_t> {
165 const std::vector<activity::ActivityImpl*>& activities_;
169 ActivityTestanySimcall(ActorImpl* actor, const std::vector<activity::ActivityImpl*>& activities)
170 : ResultingSimcall(actor, -1), activities_(activities)
173 bool is_visible() const override { return true; }
174 int get_max_consider() const override;
175 void prepare(int times_considered) override;
176 const std::vector<activity::ActivityImpl*>& get_activities() const { return activities_; }
177 int get_value() const { return next_value_; }
180 class ActivityWaitSimcall : public ResultingSimcall<bool> {
181 activity::ActivityImpl* activity_;
182 const double timeout_;
185 ActivityWaitSimcall(ActorImpl* actor, activity::ActivityImpl* activity, double timeout)
186 : ResultingSimcall(actor, false), activity_(activity), timeout_(timeout)
189 void serialize(mc::Transition::Type& type, std::stringstream& stream) override;
190 bool is_visible() const override { return true; }
191 bool is_enabled() const override;
192 activity::ActivityImpl* get_activity() const { return activity_; }
193 void set_activity(activity::ActivityImpl* activity) { activity_ = activity; }
194 double get_timeout() const { return timeout_; }
197 class ActivityWaitanySimcall : public ResultingSimcall<ssize_t> {
198 const std::vector<activity::ActivityImpl*>& activities_;
199 const double timeout_;
203 ActivityWaitanySimcall(ActorImpl* actor, const std::vector<activity::ActivityImpl*>& activities, double timeout)
204 : ResultingSimcall(actor, -1), activities_(activities), timeout_(timeout)
207 bool is_enabled() const override;
208 bool is_visible() const override { return true; }
209 void prepare(int times_considered) override;
210 int get_max_consider() const override;
211 const std::vector<activity::ActivityImpl*>& get_activities() const { return activities_; }
212 double get_timeout() const { return timeout_; }
213 int get_value() const { return next_value_; }
216 class CommIsendSimcall : public SimcallObserver {
217 activity::MailboxImpl* mbox_;
218 double payload_size_;
220 unsigned char* src_buff_;
221 size_t src_buff_size_;
226 bool (*match_fun_)(void*, void*, activity::CommImpl*);
227 void (*clean_fun_)(void*); // used to free the synchro in case of problem after a detached send
228 void (*copy_data_fun_)(activity::CommImpl*, void*, size_t); // used to copy data if not default one
230 CommIsendSimcall(ActorImpl* actor, activity::MailboxImpl* mbox, double payload_size, double rate,
231 unsigned char* src_buff, size_t src_buff_size, bool (*match_fun)(void*, void*, activity::CommImpl*),
232 void (*clean_fun)(void*), // used to free the synchro in case of problem after a detached send
233 void (*copy_data_fun)(activity::CommImpl*, void*, size_t), // used to copy data if not default one
234 void* payload, bool detached)
235 : SimcallObserver(actor)
237 , payload_size_(payload_size)
239 , src_buff_(src_buff)
240 , src_buff_size_(src_buff_size)
242 , detached_(detached)
243 , match_fun_(match_fun)
244 , clean_fun_(clean_fun)
245 , copy_data_fun_(copy_data_fun)
248 void serialize(mc::Transition::Type& type, std::stringstream& stream) override;
249 bool is_visible() const override { return true; }
250 activity::MailboxImpl* get_mailbox() const { return mbox_; }
251 double get_payload_size() const { return payload_size_; }
252 double get_rate() const { return rate_; }
253 unsigned char* get_src_buff() const { return src_buff_; }
254 size_t get_src_buff_size() const { return src_buff_size_; }
255 void* get_payload() const { return payload_; }
256 bool is_detached() const { return detached_; }
259 class CommIrecvSimcall : public SimcallObserver {
260 activity::MailboxImpl* mbox_;
261 unsigned char* dst_buff_;
262 size_t* dst_buff_size_;
267 bool (*match_fun_)(void*, void*, activity::CommImpl*);
268 void (*copy_data_fun_)(activity::CommImpl*, void*, size_t); // used to copy data if not default one
270 CommIrecvSimcall(ActorImpl* actor, activity::MailboxImpl* mbox, unsigned char* dst_buff, size_t* dst_buff_size,
271 bool (*match_fun)(void*, void*, activity::CommImpl*),
272 void (*copy_data_fun)(activity::CommImpl*, void*, size_t), void* payload, double rate)
273 : SimcallObserver(actor)
275 , dst_buff_(dst_buff)
276 , dst_buff_size_(dst_buff_size)
279 , match_fun_(match_fun)
280 , copy_data_fun_(copy_data_fun)
283 void serialize(mc::Transition::Type& type, std::stringstream& stream) override;
284 bool is_visible() const override { return true; }
285 activity::MailboxImpl* get_mailbox() const { return mbox_; }
286 double get_rate() const { return rate_; }
287 unsigned char* get_dst_buff() const { return dst_buff_; }
288 size_t* get_dst_buff_size() const { return dst_buff_size_; }
289 void* get_payload() const { return payload_; }
293 } // namespace kernel
294 } // namespace simgrid