1 /* Copyright (c) 2008-2014. The SimGrid Team.
2 * All rights reserved. */
4 /* This program is free software; you can redistribute it and/or modify it
5 * under the terms of the license (GNU LGPL) which comes with this package. */
9 #include "../simix/smx_private.h"
12 #include "mc_request.h"
13 #include "mc_private.h"
14 #include "mc_comm_pattern.h"
18 * \brief Creates a state data structure used by the exploration algorithm
20 mc_state_t MC_state_new()
22 mc_state_t state = xbt_new0(s_mc_state_t, 1);
23 state->max_pid = MC_smx_get_maxpid();
24 state->proc_status = xbt_new0(s_mc_procstate_t, state->max_pid);
25 state->system_state = NULL;
26 state->num = ++mc_stats->expanded_states;
27 state->in_visited_states = 0;
28 state->incomplete_comm_pattern = NULL;
29 /* Stateful model checking */
30 if((_sg_mc_checkpoint > 0 && (mc_stats->expanded_states % _sg_mc_checkpoint == 0)) || _sg_mc_termination){
31 state->system_state = MC_take_snapshot(state->num);
32 if(_sg_mc_comms_determinism || _sg_mc_send_determinism){
33 MC_state_copy_incomplete_communications_pattern(state);
34 MC_state_copy_index_communications_pattern(state);
41 * \brief Deletes a state data structure
42 * \param trans The state to be deleted
44 void MC_state_delete(mc_state_t state, int free_snapshot){
45 if (state->system_state && free_snapshot){
46 MC_free_snapshot(state->system_state);
48 if(_sg_mc_comms_determinism || _sg_mc_send_determinism){
49 xbt_free(state->index_comm);
50 xbt_free(state->incomplete_comm_pattern);
52 xbt_free(state->proc_status);
56 void MC_state_interleave_process(mc_state_t state, smx_process_t process)
59 state->proc_status[process->pid].state = MC_INTERLEAVE;
60 state->proc_status[process->pid].interleave_count = 0;
63 void MC_state_remove_interleave_process(mc_state_t state, smx_process_t process)
65 if (state->proc_status[process->pid].state == MC_INTERLEAVE)
66 state->proc_status[process->pid].state = MC_DONE;
69 unsigned int MC_state_interleave_size(mc_state_t state)
71 unsigned int i, size = 0;
73 for (i = 0; i < state->max_pid; i++) {
74 if ((state->proc_status[i].state == MC_INTERLEAVE)
75 || (state->proc_status[i].state == MC_MORE_INTERLEAVE))
82 int MC_state_process_is_done(mc_state_t state, smx_process_t process)
84 return state->proc_status[process->pid].state == MC_DONE ? TRUE : FALSE;
87 void MC_state_set_executed_request(mc_state_t state, smx_simcall_t req,
90 state->executed_req = *req;
91 state->req_num = value;
92 smx_process_t process = NULL;
93 mc_procstate_t procstate = NULL;
95 /* The waitany and testany request are transformed into a wait or test request over the
96 * corresponding communication action so it can be treated later by the dependence
99 case SIMCALL_COMM_WAITANY:
100 state->internal_req.call = SIMCALL_COMM_WAIT;
101 state->internal_req.issuer = req->issuer;
102 MC_process_read_dynar_element(&mc_model_checker->process,
103 &state->internal_comm, simcall_comm_waitany__get__comms(req),
104 sizeof(state->internal_comm));
105 simcall_comm_wait__set__comm(&state->internal_req, &state->internal_comm);
106 simcall_comm_wait__set__timeout(&state->internal_req, 0);
109 case SIMCALL_COMM_TESTANY:
110 state->internal_req.call = SIMCALL_COMM_TEST;
111 state->internal_req.issuer = req->issuer;
114 MC_process_read_dynar_element(&mc_model_checker->process,
115 &state->internal_comm, simcall_comm_testany__get__comms(req),
116 sizeof(state->internal_comm));
118 simcall_comm_test__set__comm(&state->internal_req, &state->internal_comm);
119 simcall_comm_test__set__result(&state->internal_req, value);
122 case SIMCALL_COMM_WAIT:
123 state->internal_req = *req;
124 MC_process_read_simple(&mc_model_checker->process, &state->internal_comm ,
125 simcall_comm_wait__get__comm(req), sizeof(state->internal_comm));
126 simcall_comm_wait__set__comm(&state->executed_req, &state->internal_comm);
127 simcall_comm_wait__set__comm(&state->internal_req, &state->internal_comm);
130 case SIMCALL_COMM_TEST:
131 state->internal_req = *req;
132 MC_process_read_simple(&mc_model_checker->process, &state->internal_comm,
133 simcall_comm_test__get__comm(req), sizeof(state->internal_comm));
134 simcall_comm_test__set__comm(&state->executed_req, &state->internal_comm);
135 simcall_comm_test__set__comm(&state->internal_req, &state->internal_comm);
138 case SIMCALL_MC_RANDOM:
139 state->internal_req = *req;
140 int random_max = simcall_mc_random__get__max(req);
141 if (value != random_max) {
142 MC_EACH_SIMIX_PROCESS(process,
143 procstate = &state->proc_status[process->pid];
144 const smx_process_t issuer = MC_smx_simcall_get_issuer(req);
145 if (process->pid == issuer->pid) {
146 procstate->state = MC_MORE_INTERLEAVE;
154 state->internal_req = *req;
159 smx_simcall_t MC_state_get_executed_request(mc_state_t state, int *value)
161 *value = state->req_num;
162 return &state->executed_req;
165 smx_simcall_t MC_state_get_internal_request(mc_state_t state)
167 return &state->internal_req;
170 smx_simcall_t MC_state_get_request(mc_state_t state, int *value)
172 smx_process_t process = NULL;
173 mc_procstate_t procstate = NULL;
174 unsigned int start_count;
175 smx_synchro_t act = NULL;
177 MC_EACH_SIMIX_PROCESS(process,
178 procstate = &state->proc_status[process->pid];
180 if (procstate->state != MC_INTERLEAVE
181 && procstate->state != MC_MORE_INTERLEAVE)
183 if (!MC_process_is_enabled(process))
186 switch (process->simcall.call) {
187 case SIMCALL_COMM_WAITANY:
189 while (procstate->interleave_count <
190 MC_process_read_dynar_length(&mc_model_checker->process,
191 simcall_comm_waitany__get__comms(&process->simcall))) {
192 if (MC_request_is_enabled_by_idx
193 (&process->simcall, procstate->interleave_count++)) {
194 *value = procstate->interleave_count - 1;
199 if (procstate->interleave_count >=
200 MC_process_read_dynar_length(&mc_model_checker->process,
201 simcall_comm_waitany__get__comms(&process->simcall)))
202 procstate->state = MC_DONE;
205 return &process->simcall;
209 case SIMCALL_COMM_TESTANY:
210 start_count = procstate->interleave_count;
212 while (procstate->interleave_count <
213 MC_process_read_dynar_length(&mc_model_checker->process,
214 simcall_comm_testany__get__comms(&process->simcall))) {
215 if (MC_request_is_enabled_by_idx
216 (&process->simcall, procstate->interleave_count++)) {
217 *value = procstate->interleave_count - 1;
222 if (procstate->interleave_count >=
223 MC_process_read_dynar_length(&mc_model_checker->process,
224 simcall_comm_testany__get__comms(&process->simcall)))
225 procstate->state = MC_DONE;
227 if (*value != -1 || start_count == 0)
228 return &process->simcall;
232 case SIMCALL_COMM_WAIT:
233 act = simcall_comm_wait__get__comm(&process->simcall);
235 if (act->comm.src_proc && act->comm.dst_proc) {
238 if (act->comm.src_proc == NULL && act->comm.type == SIMIX_COMM_READY
239 && act->comm.detached == 1)
244 procstate->state = MC_DONE;
245 return &process->simcall;
249 case SIMCALL_MC_RANDOM:
250 if (procstate->state == MC_INTERLEAVE)
253 if (state->req_num < simcall_mc_random__get__max(&process->simcall))
254 *value = state->req_num + 1;
256 procstate->state = MC_DONE;
257 return &process->simcall;
261 procstate->state = MC_DONE;
263 return &process->simcall;