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/transition/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() { 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() { 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(std::stringstream& stream) const;
59 /** Some simcalls may only be observable under some conditions.
60 * Most simcalls are not visible from the MC because they don't have an observer at all. */
61 virtual bool is_visible() const { return true; }
64 template <class T> class ResultingSimcall : public SimcallObserver {
68 ResultingSimcall() = default;
69 ResultingSimcall(ActorImpl* actor, T default_result) : SimcallObserver(actor), result_(default_result) {}
70 void set_result(T res) { result_ = res; }
71 T get_result() const { return result_; }
74 class RandomSimcall : public SimcallObserver {
80 RandomSimcall(ActorImpl* actor, int min, int max) : SimcallObserver(actor), min_(min), max_(max)
82 xbt_assert(min < max);
84 void serialize(std::stringstream& stream) const override;
85 int get_max_consider() override;
86 void prepare(int times_considered) override;
87 int get_value() const { return next_value_; }
88 bool depends(SimcallObserver* other) override;
91 class MutexSimcall : public SimcallObserver {
92 activity::MutexImpl* const mutex_;
95 MutexSimcall(ActorImpl* actor, activity::MutexImpl* mutex) : SimcallObserver(actor), mutex_(mutex) {}
96 activity::MutexImpl* get_mutex() const { return mutex_; }
97 bool depends(SimcallObserver* other) override;
100 class MutexUnlockSimcall : public MutexSimcall {
101 using MutexSimcall::MutexSimcall;
104 class MutexLockSimcall : public MutexSimcall {
105 const bool blocking_;
108 MutexLockSimcall(ActorImpl* actor, activity::MutexImpl* mutex, bool blocking = true)
109 : MutexSimcall(actor, mutex), blocking_(blocking)
112 bool is_enabled() override;
115 class ConditionWaitSimcall : public ResultingSimcall<bool> {
116 activity::ConditionVariableImpl* const cond_;
117 activity::MutexImpl* const mutex_;
118 const double timeout_;
121 ConditionWaitSimcall(ActorImpl* actor, activity::ConditionVariableImpl* cond, activity::MutexImpl* mutex,
122 double timeout = -1.0)
123 : ResultingSimcall(actor, false), cond_(cond), mutex_(mutex), timeout_(timeout)
126 bool is_enabled() override;
127 bool is_visible() const override { return false; }
128 activity::ConditionVariableImpl* get_cond() const { return cond_; }
129 activity::MutexImpl* get_mutex() const { return mutex_; }
130 double get_timeout() const { return timeout_; }
133 class SemAcquireSimcall : public ResultingSimcall<bool> {
134 activity::SemaphoreImpl* const sem_;
135 const double timeout_;
138 SemAcquireSimcall(ActorImpl* actor, activity::SemaphoreImpl* sem, double timeout = -1.0)
139 : ResultingSimcall(actor, false), sem_(sem), timeout_(timeout)
142 bool is_enabled() override;
143 bool is_visible() const override { return false; }
144 activity::SemaphoreImpl* get_sem() const { return sem_; }
145 double get_timeout() const { return timeout_; }
148 class ActivityTestSimcall : public ResultingSimcall<bool> {
149 activity::ActivityImpl* const activity_;
152 ActivityTestSimcall(ActorImpl* actor, activity::ActivityImpl* activity)
153 : ResultingSimcall(actor, true), activity_(activity)
156 bool is_visible() const override { return true; }
157 activity::ActivityImpl* get_activity() const { return activity_; }
158 void serialize(std::stringstream& stream) const override;
161 class ActivityTestanySimcall : public ResultingSimcall<ssize_t> {
162 const std::vector<activity::ActivityImpl*>& activities_;
163 std::vector<int> indexes_; // indexes in activities_ pointing to ready activities (=whose test() is positive)
167 ActivityTestanySimcall(ActorImpl* actor, const std::vector<activity::ActivityImpl*>& activities);
168 bool is_visible() const override { return true; }
169 bool is_enabled() override { return true; /* can return -1 if no activity is ready */ }
170 void serialize(std::stringstream& stream) const override;
171 int get_max_consider() override;
172 void prepare(int times_considered) override;
173 const std::vector<activity::ActivityImpl*>& get_activities() const { return activities_; }
174 int get_value() const { return next_value_; }
177 class ActivityWaitSimcall : public ResultingSimcall<bool> {
178 activity::ActivityImpl* activity_;
179 const double timeout_;
182 ActivityWaitSimcall(ActorImpl* actor, activity::ActivityImpl* activity, double timeout)
183 : ResultingSimcall(actor, false), activity_(activity), timeout_(timeout)
186 void serialize(std::stringstream& stream) const override;
187 bool is_visible() const override { return true; }
188 bool is_enabled() override;
189 activity::ActivityImpl* get_activity() const { return activity_; }
190 void set_activity(activity::ActivityImpl* activity) { activity_ = activity; }
191 double get_timeout() const { return timeout_; }
194 class ActivityWaitanySimcall : public ResultingSimcall<ssize_t> {
195 const std::vector<activity::ActivityImpl*>& activities_;
196 std::vector<int> indexes_; // indexes in activities_ pointing to ready activities (=whose test() is positive)
197 const double timeout_;
201 ActivityWaitanySimcall(ActorImpl* actor, const std::vector<activity::ActivityImpl*>& activities, double timeout);
202 bool is_enabled() override;
203 void serialize(std::stringstream& stream) const override;
204 bool is_visible() const override { return true; }
205 void prepare(int times_considered) override;
206 int get_max_consider() override;
207 const std::vector<activity::ActivityImpl*>& get_activities() const { return activities_; }
208 double get_timeout() const { return timeout_; }
209 int get_value() const { return next_value_; }
212 class CommIsendSimcall : public SimcallObserver {
213 activity::MailboxImpl* mbox_;
214 double payload_size_;
216 unsigned char* src_buff_;
217 size_t src_buff_size_;
220 activity::CommImpl* comm_;
223 bool (*match_fun_)(void*, void*, activity::CommImpl*);
224 void (*clean_fun_)(void*); // used to free the synchro in case of problem after a detached send
225 void (*copy_data_fun_)(activity::CommImpl*, void*, size_t); // used to copy data if not default one
228 CommIsendSimcall(ActorImpl* actor, activity::MailboxImpl* mbox, double payload_size, double rate,
229 unsigned char* src_buff, size_t src_buff_size, bool (*match_fun)(void*, void*, activity::CommImpl*),
230 void (*clean_fun)(void*), // used to free the synchro in case of problem after a detached send
231 void (*copy_data_fun)(activity::CommImpl*, void*, size_t), // used to copy data if not default one
232 void* payload, bool detached)
233 : SimcallObserver(actor)
235 , payload_size_(payload_size)
237 , src_buff_(src_buff)
238 , src_buff_size_(src_buff_size)
240 , detached_(detached)
241 , match_fun_(match_fun)
242 , clean_fun_(clean_fun)
243 , copy_data_fun_(copy_data_fun)
246 void serialize(std::stringstream& stream) const override;
247 bool is_visible() const override { return true; }
248 activity::MailboxImpl* get_mailbox() const { return mbox_; }
249 double get_payload_size() const { return payload_size_; }
250 double get_rate() const { return rate_; }
251 unsigned char* get_src_buff() const { return src_buff_; }
252 size_t get_src_buff_size() const { return src_buff_size_; }
253 void* get_payload() const { return payload_; }
254 bool is_detached() const { return detached_; }
255 void set_comm(activity::CommImpl* comm) { comm_ = comm; }
256 void set_tag(int tag) { tag_ = tag; }
258 auto get_match_fun() const { return match_fun_; }
259 auto get_clean_fun() const { return clean_fun_; }
260 auto get_copy_data_fun() const { return copy_data_fun_; }
263 class CommIrecvSimcall : public SimcallObserver {
264 activity::MailboxImpl* mbox_;
265 unsigned char* dst_buff_;
266 size_t* dst_buff_size_;
270 activity::CommImpl* comm_;
272 bool (*match_fun_)(void*, void*, activity::CommImpl*);
273 void (*copy_data_fun_)(activity::CommImpl*, void*, size_t); // used to copy data if not default one
276 CommIrecvSimcall(ActorImpl* actor, activity::MailboxImpl* mbox, unsigned char* dst_buff, size_t* dst_buff_size,
277 bool (*match_fun)(void*, void*, activity::CommImpl*),
278 void (*copy_data_fun)(activity::CommImpl*, void*, size_t), void* payload, double rate)
279 : SimcallObserver(actor)
281 , dst_buff_(dst_buff)
282 , dst_buff_size_(dst_buff_size)
285 , match_fun_(match_fun)
286 , copy_data_fun_(copy_data_fun)
289 void serialize(std::stringstream& stream) const override;
290 bool is_visible() const override { return true; }
291 activity::MailboxImpl* get_mailbox() const { return mbox_; }
292 double get_rate() const { return rate_; }
293 unsigned char* get_dst_buff() const { return dst_buff_; }
294 size_t* get_dst_buff_size() const { return dst_buff_size_; }
295 void* get_payload() const { return payload_; }
296 void set_comm(activity::CommImpl* comm) { comm_ = comm; }
297 void set_tag(int tag) { tag_ = tag; }
299 auto get_match_fun() const { return match_fun_; };
300 auto get_copy_data_fun() const { return copy_data_fun_; }
304 } // namespace kernel
305 } // namespace simgrid