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_stats_pair_t mc_stats_pair = NULL;
19 mc_state_t mc_current_state = NULL;
20 char mc_replay_mode = FALSE;
21 double *mc_time = NULL;
22 xbt_fifo_t mc_snapshot_stack = NULL;
25 * \brief Initialize the model-checker data structures
29 /* Check if MC is already initialized */
33 mc_time = xbt_new0(double, simix_process_maxpid);
35 /* Initialize the data structures that must be persistent across every
36 iteration of the model-checker (in RAW memory) */
39 /* Initialize statistics */
40 mc_stats = xbt_new0(s_mc_stats_t, 1);
41 mc_stats->state_size = 1;
43 /* Create exploration stack */
44 mc_stack = xbt_fifo_new();
51 /* Save the initial state */
52 initial_snapshot = xbt_new0(s_mc_snapshot_t, 1);
53 MC_take_snapshot(initial_snapshot);
57 void MC_init_with_automaton(xbt_automaton_t a){
59 XBT_DEBUG("Start init mc");
61 mc_time = xbt_new0(double, simix_process_maxpid);
63 /* Initialize the data structures that must be persistent across every
64 iteration of the model-checker (in RAW memory) */
68 /* Initialize statistics */
69 mc_stats_pair = xbt_new0(s_mc_stats_pair_t, 1);
70 //mc_stats_pair->pair_size = 1;
72 XBT_DEBUG("Creating snapshot_stack");
74 /* Create exploration stack */
75 mc_snapshot_stack = xbt_fifo_new();
84 void MC_modelcheck(void)
91 void MC_modelcheck_with_automaton(xbt_automaton_t a){
92 MC_init_with_automaton(a);
93 MC_exit_with_automaton();
96 void MC_exit_with_automaton(void)
98 MC_print_statistics_pairs(mc_stats_pair);
105 MC_print_statistics(mc_stats);
110 int MC_random(int min, int max)
112 /*FIXME: return mc_current_state->executed_transition->random.value;*/
117 * \brief Schedules all the process that are ready to run
119 void MC_wait_for_requests(void)
121 smx_process_t process;
125 while (xbt_dynar_length(simix_global->process_to_run)) {
126 SIMIX_process_runall();
127 xbt_dynar_foreach(simix_global->process_that_ran, iter, process) {
128 req = &process->request;
129 if (req->call != REQ_NO_REQ && !MC_request_is_visible(req))
130 SIMIX_request_pre(req, 0);
135 int MC_deadlock_check()
137 int deadlock = FALSE;
138 smx_process_t process;
139 if(xbt_swag_size(simix_global->process_list)){
141 xbt_swag_foreach(process, simix_global->process_list){
142 if(process->request.call != REQ_NO_REQ
143 && MC_request_is_enabled(&process->request)){
153 * \brief Re-executes from the initial state all the transitions indicated by
154 * a given model-checker stack.
155 * \param stack The stack with the transitions to execute.
157 void MC_replay(xbt_fifo_t stack)
161 smx_req_t req = NULL, saved_req = NULL;
162 xbt_fifo_item_t item;
165 XBT_DEBUG("**** Begin Replay ****");
167 /* Restore the initial state */
168 MC_restore_snapshot(initial_snapshot);
169 /* At the moment of taking the snapshot the raw heap was set, so restoring
170 * it will set it back again, we have to unset it to continue */
173 /* Traverse the stack from the initial state and re-execute the transitions */
174 for (item = xbt_fifo_get_last_item(stack);
175 item != xbt_fifo_get_first_item(stack);
176 item = xbt_fifo_get_prev_item(item)) {
178 state = (mc_state_t) xbt_fifo_get_item_content(item);
179 saved_req = MC_state_get_executed_request(state, &value);
182 /* because we got a copy of the executed request, we have to fetch the
183 real one, pointed by the request field of the issuer process */
184 req = &saved_req->issuer->request;
186 /* Debug information */
187 if(XBT_LOG_ISENABLED(mc_global, xbt_log_priority_debug)){
188 req_str = MC_request_to_string(req, value);
189 XBT_DEBUG("Replay: %s (%p)", req_str, state);
194 SIMIX_request_pre(req, value);
195 MC_wait_for_requests();
197 /* Update statistics */
198 mc_stats->visited_states++;
199 mc_stats->executed_transitions++;
201 XBT_DEBUG("**** End Replay ****");
205 * \brief Dumps the contents of a model-checker's stack and shows the actual
207 * \param stack The stack to dump
209 void MC_dump_stack(xbt_fifo_t stack)
213 MC_show_stack(stack);
216 while ((state = (mc_state_t) xbt_fifo_pop(stack)) != NULL)
217 MC_state_delete(state);
221 void MC_show_stack(xbt_fifo_t stack)
225 xbt_fifo_item_t item;
227 char *req_str = NULL;
229 for (item = xbt_fifo_get_last_item(stack);
230 (item ? (state = (mc_state_t) (xbt_fifo_get_item_content(item)))
231 : (NULL)); item = xbt_fifo_get_prev_item(item)) {
232 req = MC_state_get_executed_request(state, &value);
234 req_str = MC_request_to_string(req, value);
235 XBT_INFO("%s", req_str);
241 void MC_show_deadlock(smx_req_t req)
243 /*char *req_str = NULL;*/
244 XBT_INFO("**************************");
245 XBT_INFO("*** DEAD-LOCK DETECTED ***");
246 XBT_INFO("**************************");
247 XBT_INFO("Locked request:");
248 /*req_str = MC_request_to_string(req);
249 XBT_INFO("%s", req_str);
251 XBT_INFO("Counter-example execution trace:");
252 MC_dump_stack(mc_stack);
255 void MC_print_statistics(mc_stats_t stats)
257 XBT_INFO("State space size ~= %lu", stats->state_size);
258 XBT_INFO("Expanded states = %lu", stats->expanded_states);
259 XBT_INFO("Visited states = %lu", stats->visited_states);
260 XBT_INFO("Executed transitions = %lu", stats->executed_transitions);
261 XBT_INFO("Expanded / Visited = %lf",
262 (double) stats->visited_states / stats->expanded_states);
263 /*XBT_INFO("Exploration coverage = %lf",
264 (double)stats->expanded_states / stats->state_size); */
267 void MC_print_statistics_pairs(mc_stats_pair_t stats)
269 XBT_INFO("Expanded pairs = %lu", stats->expanded_pairs);
270 XBT_INFO("Visited pairs = %lu", stats->visited_pairs);
271 //XBT_INFO("Executed transitions = %lu", stats->executed_transitions);
272 XBT_INFO("Expanded / Visited = %lf",
273 (double) stats->visited_pairs / stats->expanded_pairs);
274 /*XBT_INFO("Exploration coverage = %lf",
275 (double)stats->expanded_states / stats->state_size); */
278 void MC_assert(int prop)
280 if (MC_IS_ENABLED && !prop) {
281 XBT_INFO("**************************");
282 XBT_INFO("*** PROPERTY NOT VALID ***");
283 XBT_INFO("**************************");
284 XBT_INFO("Counter-example execution trace:");
285 MC_dump_stack(mc_stack);
286 MC_print_statistics(mc_stats);
291 void MC_assert_pair(int prop){
292 if (MC_IS_ENABLED && !prop) {
293 XBT_INFO("**************************");
294 XBT_INFO("*** PROPERTY NOT VALID ***");
295 XBT_INFO("**************************");
296 //XBT_INFO("Counter-example execution trace:");
297 MC_show_snapshot_stack(mc_snapshot_stack);
298 //MC_dump_snapshot_stack(mc_snapshot_stack);
299 MC_print_statistics_pairs(mc_stats_pair);
304 void MC_process_clock_add(smx_process_t process, double amount)
306 mc_time[process->pid] += amount;
309 double MC_process_clock_get(smx_process_t process)
312 return mc_time[process->pid];