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 // FIXME, read from remote process
115 MC_process_read_dynar_element(&mc_model_checker->process,
116 &state->internal_comm, simcall_comm_testany__get__comms(req),
117 sizeof(state->internal_comm));
119 simcall_comm_test__set__comm(&state->internal_req, &state->internal_comm);
120 simcall_comm_test__set__result(&state->internal_req, value);
123 case SIMCALL_COMM_WAIT:
124 state->internal_req = *req;
125 MC_process_read_simple(&mc_model_checker->process, &state->internal_comm ,
126 simcall_comm_wait__get__comm(req), sizeof(state->internal_comm));
127 simcall_comm_wait__set__comm(&state->executed_req, &state->internal_comm);
128 simcall_comm_wait__set__comm(&state->internal_req, &state->internal_comm);
131 case SIMCALL_COMM_TEST:
132 state->internal_req = *req;
133 MC_process_read_simple(&mc_model_checker->process, &state->internal_comm,
134 simcall_comm_test__get__comm(req), sizeof(state->internal_comm));
135 simcall_comm_test__set__comm(&state->executed_req, &state->internal_comm);
136 simcall_comm_test__set__comm(&state->internal_req, &state->internal_comm);
139 case SIMCALL_MC_RANDOM:
140 state->internal_req = *req;
141 int random_max = simcall_mc_random__get__max(req);
142 if (value != random_max) {
143 MC_EACH_SIMIX_PROCESS(process,
144 procstate = &state->proc_status[process->pid];
145 const smx_process_t issuer = MC_smx_simcall_get_issuer(req);
146 if (process->pid == issuer->pid) {
147 procstate->state = MC_MORE_INTERLEAVE;
155 state->internal_req = *req;
160 smx_simcall_t MC_state_get_executed_request(mc_state_t state, int *value)
162 *value = state->req_num;
163 return &state->executed_req;
166 smx_simcall_t MC_state_get_internal_request(mc_state_t state)
168 return &state->internal_req;
171 smx_simcall_t MC_state_get_request(mc_state_t state, int *value)
173 smx_process_t process = NULL;
174 mc_procstate_t procstate = NULL;
175 unsigned int start_count;
176 smx_synchro_t act = NULL;
178 MC_EACH_SIMIX_PROCESS(process,
179 procstate = &state->proc_status[process->pid];
181 if (procstate->state != MC_INTERLEAVE
182 && procstate->state != MC_MORE_INTERLEAVE)
184 if (!MC_process_is_enabled(process))
187 switch (process->simcall.call) {
188 case SIMCALL_COMM_WAITANY:
190 while (procstate->interleave_count <
191 MC_process_read_dynar_length(&mc_model_checker->process,
192 simcall_comm_waitany__get__comms(&process->simcall))) {
193 if (MC_request_is_enabled_by_idx
194 (&process->simcall, procstate->interleave_count++)) {
195 *value = procstate->interleave_count - 1;
200 if (procstate->interleave_count >=
201 MC_process_read_dynar_length(&mc_model_checker->process,
202 simcall_comm_waitany__get__comms(&process->simcall)))
203 procstate->state = MC_DONE;
206 return &process->simcall;
210 case SIMCALL_COMM_TESTANY:
211 start_count = procstate->interleave_count;
213 while (procstate->interleave_count <
214 MC_process_read_dynar_length(&mc_model_checker->process,
215 simcall_comm_testany__get__comms(&process->simcall))) {
216 if (MC_request_is_enabled_by_idx
217 (&process->simcall, procstate->interleave_count++)) {
218 *value = procstate->interleave_count - 1;
223 if (procstate->interleave_count >=
224 MC_process_read_dynar_length(&mc_model_checker->process,
225 simcall_comm_testany__get__comms(&process->simcall)))
226 procstate->state = MC_DONE;
228 if (*value != -1 || start_count == 0)
229 return &process->simcall;
233 case SIMCALL_COMM_WAIT:
234 act = simcall_comm_wait__get__comm(&process->simcall);
236 if (act->comm.src_proc && act->comm.dst_proc) {
239 if (act->comm.src_proc == NULL && act->comm.type == SIMIX_COMM_READY
240 && act->comm.detached == 1)
245 procstate->state = MC_DONE;
246 return &process->simcall;
250 case SIMCALL_MC_RANDOM:
251 if (procstate->state == MC_INTERLEAVE)
254 if (state->req_num < simcall_mc_random__get__max(&process->simcall))
255 *value = state->req_num + 1;
257 procstate->state = MC_DONE;
258 return &process->simcall;
262 procstate->state = MC_DONE;
264 return &process->simcall;