5 #include "../surf/surf_private.h"
6 #include "../simix/private.h"
11 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_global, mc,
12 "Logging specific to MC (global)");
14 /* MC global data structures */
15 mc_snapshot_t initial_snapshot = NULL;
16 xbt_fifo_t mc_stack = NULL;
17 mc_stats_t mc_stats = NULL;
18 mc_state_t mc_current_state = NULL;
19 char mc_replay_mode = FALSE;
20 double *mc_time = NULL;
22 * \brief Initialize the model-checker data structures
26 /* Check if MC is already initialized */
30 mc_time = xbt_new0(double, simix_process_maxpid);
32 /* Initialize the data structures that must be persistent across every
33 iteration of the model-checker (in RAW memory) */
36 /* Initialize statistics */
37 mc_stats = xbt_new0(s_mc_stats_t, 1);
38 mc_stats->state_size = 1;
40 /* Create exploration stack */
41 mc_stack = xbt_fifo_new();
48 /* Save the initial state */
49 initial_snapshot = xbt_new0(s_mc_snapshot_t, 1);
50 MC_take_snapshot(initial_snapshot);
54 void MC_modelcheck(void)
67 int MC_random(int min, int max)
69 /*FIXME: return mc_current_state->executed_transition->random.value;*/
74 * \brief Schedules all the process that are ready to run
76 void MC_wait_for_requests(void)
81 SIMIX_context_runall(simix_global->process_to_run);
82 while((req = SIMIX_request_pop())){
83 if(!MC_request_is_visible(req))
84 SIMIX_request_pre(req, 0);
86 } while (xbt_dynar_length(simix_global->process_to_run));
89 int MC_deadlock_check()
92 smx_process_t process;
93 if(xbt_swag_size(simix_global->process_list)){
95 xbt_swag_foreach(process, simix_global->process_list){
96 if(process->request.call != REQ_NO_REQ
97 && MC_request_is_enabled(&process->request)){
107 * \brief Re-executes from the initial state all the transitions indicated by
108 * a given model-checker stack.
109 * \param stack The stack with the transitions to execute.
111 void MC_replay(xbt_fifo_t stack)
115 smx_req_t req = NULL, saved_req = NULL;
116 xbt_fifo_item_t item;
119 DEBUG0("**** Begin Replay ****");
121 /* Restore the initial state */
122 MC_restore_snapshot(initial_snapshot);
123 /* At the moment of taking the snapshot the raw heap was set, so restoring
124 * it will set it back again, we have to unset it to continue */
127 /* Traverse the stack from the initial state and re-execute the transitions */
128 for (item = xbt_fifo_get_last_item(stack);
129 item != xbt_fifo_get_first_item(stack);
130 item = xbt_fifo_get_prev_item(item)) {
132 state = (mc_state_t) xbt_fifo_get_item_content(item);
133 saved_req = MC_state_get_executed_request(state, &value);
136 /* because we got a copy of the executed request, we have to fetch the
137 real one, pointed by the request field of the issuer process */
138 req = &saved_req->issuer->request;
140 /* Debug information */
141 if(XBT_LOG_ISENABLED(mc_global, xbt_log_priority_debug)){
142 req_str = MC_request_to_string(req, value);
143 DEBUG2("Replay: %s (%p)", req_str, state);
148 SIMIX_request_pre(req, value);
149 MC_wait_for_requests();
151 /* Update statistics */
152 mc_stats->visited_states++;
153 mc_stats->executed_transitions++;
155 DEBUG0("**** End Replay ****");
159 * \brief Dumps the contents of a model-checker's stack and shows the actual
161 * \param stack The stack to dump
163 void MC_dump_stack(xbt_fifo_t stack)
167 MC_show_stack(stack);
170 while ((state = (mc_state_t) xbt_fifo_pop(stack)) != NULL)
171 MC_state_delete(state);
175 void MC_show_stack(xbt_fifo_t stack)
179 xbt_fifo_item_t item;
181 char *req_str = NULL;
183 for (item = xbt_fifo_get_last_item(stack);
184 (item ? (state = (mc_state_t) (xbt_fifo_get_item_content(item)))
185 : (NULL)); item = xbt_fifo_get_prev_item(item)) {
186 req = MC_state_get_executed_request(state, &value);
188 req_str = MC_request_to_string(req, value);
189 INFO1("%s", req_str);
195 void MC_show_deadlock(smx_req_t req)
197 /*char *req_str = NULL;*/
198 INFO0("**************************");
199 INFO0("*** DEAD-LOCK DETECTED ***");
200 INFO0("**************************");
201 INFO0("Locked request:");
202 /*req_str = MC_request_to_string(req);
203 INFO1("%s", req_str);
205 INFO0("Counter-example execution trace:");
206 MC_dump_stack(mc_stack);
209 void MC_print_statistics(mc_stats_t stats)
211 INFO1("State space size ~= %lu", stats->state_size);
212 INFO1("Expanded states = %lu", stats->expanded_states);
213 INFO1("Visited states = %lu", stats->visited_states);
214 INFO1("Executed transitions = %lu", stats->executed_transitions);
215 INFO1("Expanded / Visited = %lf",
216 (double) stats->visited_states / stats->expanded_states);
217 /*INFO1("Exploration coverage = %lf",
218 (double)stats->expanded_states / stats->state_size); */
221 void MC_assert(int prop)
223 if (MC_IS_ENABLED && !prop) {
224 INFO0("**************************");
225 INFO0("*** PROPERTY NOT VALID ***");
226 INFO0("**************************");
227 INFO0("Counter-example execution trace:");
228 MC_dump_stack(mc_stack);
229 MC_print_statistics(mc_stats);
234 void MC_process_clock_add(smx_process_t process, double amount)
236 mc_time[process->pid] += amount;
239 double MC_process_clock_get(smx_process_t process)
242 return mc_time[process->pid];