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"
17 using simgrid::mc::remote;
21 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_state, mc,
22 "Logging specific to MC (state)");
25 * \brief Creates a state data structure used by the exploration algorithm
27 mc_state_t MC_state_new()
29 mc_state_t state = xbt_new0(s_mc_state_t, 1);
31 state->max_pid = MC_smx_get_maxpid();
32 state->proc_status = xbt_new0(s_mc_procstate_t, state->max_pid);
33 state->system_state = NULL;
34 state->num = ++mc_stats->expanded_states;
35 state->in_visited_states = 0;
36 state->incomplete_comm_pattern = NULL;
37 /* Stateful model checking */
38 if((_sg_mc_checkpoint > 0 && (mc_stats->expanded_states % _sg_mc_checkpoint == 0)) || _sg_mc_termination){
39 state->system_state = MC_take_snapshot(state->num);
40 if(_sg_mc_comms_determinism || _sg_mc_send_determinism){
41 MC_state_copy_incomplete_communications_pattern(state);
42 MC_state_copy_index_communications_pattern(state);
49 * \brief Deletes a state data structure
50 * \param trans The state to be deleted
52 void MC_state_delete(mc_state_t state, int free_snapshot){
53 if (state->system_state && free_snapshot){
54 delete state->system_state;
56 if(_sg_mc_comms_determinism || _sg_mc_send_determinism){
57 xbt_free(state->index_comm);
58 xbt_free(state->incomplete_comm_pattern);
60 xbt_free(state->proc_status);
64 void MC_state_interleave_process(mc_state_t state, smx_process_t process)
67 state->proc_status[process->pid].state = MC_INTERLEAVE;
68 state->proc_status[process->pid].interleave_count = 0;
71 void MC_state_remove_interleave_process(mc_state_t state, smx_process_t process)
73 if (state->proc_status[process->pid].state == MC_INTERLEAVE)
74 state->proc_status[process->pid].state = MC_DONE;
77 unsigned int MC_state_interleave_size(mc_state_t state)
79 unsigned int i, size = 0;
81 for (i = 0; i < state->max_pid; i++) {
82 if ((state->proc_status[i].state == MC_INTERLEAVE)
83 || (state->proc_status[i].state == MC_MORE_INTERLEAVE))
90 int MC_state_process_is_done(mc_state_t state, smx_process_t process)
92 return state->proc_status[process->pid].state == MC_DONE ? TRUE : FALSE;
95 void MC_state_set_executed_request(mc_state_t state, smx_simcall_t req,
98 state->executed_req = *req;
99 state->req_num = value;
101 smx_process_t process = NULL;
103 /* The waitany and testany request are transformed into a wait or test request over the
104 * corresponding communication action so it can be treated later by the dependence
107 case SIMCALL_COMM_WAITANY:
108 state->internal_req.call = SIMCALL_COMM_WAIT;
109 state->internal_req.issuer = req->issuer;
110 MC_process_read_dynar_element(&mc_model_checker->process(),
111 &state->internal_comm, simcall_comm_waitany__get__comms(req),
112 value, sizeof(state->internal_comm));
113 simcall_comm_wait__set__comm(&state->internal_req, &state->internal_comm);
114 simcall_comm_wait__set__timeout(&state->internal_req, 0);
117 case SIMCALL_COMM_TESTANY:
118 state->internal_req.call = SIMCALL_COMM_TEST;
119 state->internal_req.issuer = req->issuer;
122 MC_process_read_dynar_element(&mc_model_checker->process(),
123 &state->internal_comm, simcall_comm_testany__get__comms(req),
124 value, sizeof(state->internal_comm));
126 simcall_comm_test__set__comm(&state->internal_req, &state->internal_comm);
127 simcall_comm_test__set__result(&state->internal_req, value);
130 case SIMCALL_COMM_WAIT:
131 state->internal_req = *req;
132 mc_model_checker->process().read_bytes(&state->internal_comm ,
133 sizeof(state->internal_comm), remote(simcall_comm_wait__get__comm(req)));
134 simcall_comm_wait__set__comm(&state->executed_req, &state->internal_comm);
135 simcall_comm_wait__set__comm(&state->internal_req, &state->internal_comm);
138 case SIMCALL_COMM_TEST:
139 state->internal_req = *req;
140 mc_model_checker->process().read_bytes(&state->internal_comm,
141 sizeof(state->internal_comm), remote(simcall_comm_test__get__comm(req)));
142 simcall_comm_test__set__comm(&state->executed_req, &state->internal_comm);
143 simcall_comm_test__set__comm(&state->internal_req, &state->internal_comm);
146 case SIMCALL_MC_RANDOM: {
147 state->internal_req = *req;
148 int random_max = simcall_mc_random__get__max(req);
149 if (value != random_max) {
150 MC_EACH_SIMIX_PROCESS(process,
151 mc_procstate_t procstate = &state->proc_status[process->pid];
152 const smx_process_t issuer = MC_smx_simcall_get_issuer(req);
153 if (process->pid == issuer->pid) {
154 procstate->state = MC_MORE_INTERLEAVE;
163 state->internal_req = *req;
168 smx_simcall_t MC_state_get_executed_request(mc_state_t state, int *value)
170 *value = state->req_num;
171 return &state->executed_req;
174 smx_simcall_t MC_state_get_internal_request(mc_state_t state)
176 return &state->internal_req;
179 static inline smx_simcall_t MC_state_get_request_for_process(
180 mc_state_t state, int*value, smx_process_t process)
182 mc_procstate_t procstate = &state->proc_status[process->pid];
184 if (procstate->state != MC_INTERLEAVE
185 && procstate->state != MC_MORE_INTERLEAVE)
187 if (!MC_process_is_enabled(process))
190 switch (process->simcall.call) {
192 case SIMCALL_COMM_WAITANY:
194 while (procstate->interleave_count <
195 MC_process_read_dynar_length(&mc_model_checker->process(),
196 simcall_comm_waitany__get__comms(&process->simcall))) {
197 if (MC_request_is_enabled_by_idx
198 (&process->simcall, procstate->interleave_count++)) {
199 *value = procstate->interleave_count - 1;
204 if (procstate->interleave_count >=
205 MC_process_read_dynar_length(&mc_model_checker->process(),
206 simcall_comm_waitany__get__comms(&process->simcall)))
207 procstate->state = MC_DONE;
210 return &process->simcall;
214 case SIMCALL_COMM_TESTANY: {
215 unsigned start_count = procstate->interleave_count;
217 while (procstate->interleave_count <
218 MC_process_read_dynar_length(&mc_model_checker->process(),
219 simcall_comm_testany__get__comms(&process->simcall))) {
220 if (MC_request_is_enabled_by_idx
221 (&process->simcall, procstate->interleave_count++)) {
222 *value = procstate->interleave_count - 1;
227 if (procstate->interleave_count >=
228 MC_process_read_dynar_length(&mc_model_checker->process(),
229 simcall_comm_testany__get__comms(&process->simcall)))
230 procstate->state = MC_DONE;
232 if (*value != -1 || start_count == 0)
233 return &process->simcall;
238 case SIMCALL_COMM_WAIT: {
239 smx_synchro_t remote_act = simcall_comm_wait__get__comm(&process->simcall);
241 mc_model_checker->process().read_bytes(
242 &act, sizeof(act), remote(remote_act));
243 if (act.comm.src_proc && act.comm.dst_proc) {
246 if (act.comm.src_proc == NULL && act.comm.type == SIMIX_COMM_READY
247 && act.comm.detached == 1)
252 procstate->state = MC_DONE;
253 return &process->simcall;
256 case SIMCALL_MC_RANDOM:
257 if (procstate->state == MC_INTERLEAVE)
258 *value = simcall_mc_random__get__min(&process->simcall);
260 if (state->req_num < simcall_mc_random__get__max(&process->simcall))
261 *value = state->req_num + 1;
263 procstate->state = MC_DONE;
264 return &process->simcall;
267 procstate->state = MC_DONE;
269 return &process->simcall;
274 smx_simcall_t MC_state_get_request(mc_state_t state, int *value)
276 smx_process_t process = NULL;
277 MC_EACH_SIMIX_PROCESS(process,
278 smx_simcall_t res = MC_state_get_request_for_process(state, value, process);