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 xbt_setset_t mc_setset = NULL;
18 mc_stats_t mc_stats = NULL;
19 mc_state_t mc_current_state = NULL;
20 char mc_replay_mode = FALSE;
23 * \brief Initialize the model-checker data structures
27 smx_process_t process;
29 /* Check if MC is already initialized */
33 /* Initialize the data structures that must be persistent across every
34 iteration of the model-checker (in RAW memory) */
37 /* Initialize statistics */
38 mc_stats = xbt_new0(s_mc_stats_t, 1);
39 mc_stats->state_size = 1;
41 /* Create exploration stack */
42 mc_stack = xbt_fifo_new();
44 /* Create the container for the sets */
45 mc_setset = xbt_setset_new(20);
47 /* Add the existing processes to mc's setset so they have an ID designated */
48 /* FIXME: check what happen if there are processes created during the exploration */
49 xbt_swag_foreach(process, simix_global->process_list){
50 xbt_setset_elm_add(mc_setset, process);
57 /* Save the initial state */
58 initial_snapshot = xbt_new0(s_mc_snapshot_t, 1);
59 MC_take_snapshot(initial_snapshot);
63 void MC_modelcheck(void)
75 int MC_random(int min, int max)
77 /*FIXME: return mc_current_state->executed_transition->random.value;*/
82 * \brief Re-executes from the initial state all the transitions indicated by
83 * a given model-checker stack.
84 * \param stack The stack with the transitions to execute.
86 void MC_replay(xbt_fifo_t stack)
89 smx_req_t req = NULL, saved_req = NULL;
93 DEBUG0("**** Begin Replay ****");
95 /* Restore the initial state */
96 MC_restore_snapshot(initial_snapshot);
97 /* At the moment of taking the snapshot the raw heap was set, so restoring
98 * it will set it back again, we have to unset it to continue */
101 /* Traverse the stack from the initial state and re-execute the transitions */
102 for (item = xbt_fifo_get_last_item(stack);
103 item != xbt_fifo_get_first_item(stack);
104 item = xbt_fifo_get_prev_item(item)) {
106 state = (mc_state_t) xbt_fifo_get_item_content(item);
107 saved_req = MC_state_get_executed_request(state);
110 /* because we got a copy of the executed request, we have to fetch the
111 real one, pointed by the request field of the issuer process */
112 req = &saved_req->issuer->request;
114 /* Debug information */
115 if(XBT_LOG_ISENABLED(mc_global, xbt_log_priority_debug)){
116 req_str = MC_request_to_string(req);
117 DEBUG2("Replay: %s (%p)", req_str, state);
122 SIMIX_request_pre(req);
123 MC_wait_for_requests();
125 /* Update statistics */
126 mc_stats->visited_states++;
127 mc_stats->executed_transitions++;
129 DEBUG0("**** End Replay ****");
133 * \brief Dumps the contents of a model-checker's stack and shows the actual
135 * \param stack The stack to dump
137 void MC_dump_stack(xbt_fifo_t stack)
141 MC_show_stack(stack);
144 while ((state = (mc_state_t) xbt_fifo_pop(stack)) != NULL)
145 MC_state_delete(state);
149 void MC_show_stack(xbt_fifo_t stack)
152 xbt_fifo_item_t item;
154 char *req_str = NULL;
156 for (item = xbt_fifo_get_last_item(stack);
157 (item ? (state = (mc_state_t) (xbt_fifo_get_item_content(item)))
158 : (NULL)); item = xbt_fifo_get_prev_item(item)) {
159 req = MC_state_get_executed_request(state);
161 req_str = MC_request_to_string(req);
162 INFO1("%s", req_str);
169 * \brief Schedules all the process that are ready to run
171 void MC_wait_for_requests(void)
173 char *req_str = NULL;
174 smx_req_t req = NULL;
177 SIMIX_context_runall(simix_global->process_to_run);
178 while((req = SIMIX_request_pop())){
179 if(!SIMIX_request_is_visible(req))
180 SIMIX_request_pre(req);
181 else if(req->call == REQ_COMM_WAITANY)
183 else if(XBT_LOG_ISENABLED(mc_global, xbt_log_priority_debug)){
184 req_str = MC_request_to_string(req);
185 DEBUG1("Got: %s", req_str);
189 } while (xbt_dynar_length(simix_global->process_to_run));
192 /****************************** Statistics ************************************/
193 void MC_print_statistics(mc_stats_t stats)
195 INFO1("State space size ~= %lu", stats->state_size);
196 INFO1("Expanded states = %lu", stats->expanded_states);
197 INFO1("Visited states = %lu", stats->visited_states);
198 INFO1("Executed transitions = %lu", stats->executed_transitions);
199 INFO1("Expanded / Visited = %lf",
200 (double) stats->visited_states / stats->expanded_states);
201 /*INFO1("Exploration coverage = %lf",
202 (double)stats->expanded_states / stats->state_size); */
205 /************************* Assertion Checking *********************************/
206 void MC_assert(int prop)
208 if (MC_IS_ENABLED && !prop) {
209 INFO0("**************************");
210 INFO0("*** PROPERTY NOT VALID ***");
211 INFO0("**************************");
212 INFO0("Counter-example execution trace:");
213 MC_dump_stack(mc_stack);
214 MC_print_statistics(mc_stats);
219 void MC_show_deadlock(smx_req_t req)
221 char *req_str = NULL;
222 INFO0("**************************");
223 INFO0("*** DEAD-LOCK DETECTED ***");
224 INFO0("**************************");
225 INFO0("Locked request:");
226 req_str = MC_request_to_string(req);
227 INFO1("%s", req_str);
229 INFO0("Counter-example execution trace:");
230 MC_dump_stack(mc_stack);