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;
21 xbt_fifo_t mc_snapshot_stack = NULL;
24 * \brief Initialize the model-checker data structures
28 /* Check if MC is already initialized */
32 mc_time = xbt_new0(double, simix_process_maxpid);
34 /* Initialize the data structures that must be persistent across every
35 iteration of the model-checker (in RAW memory) */
38 /* Initialize statistics */
39 mc_stats = xbt_new0(s_mc_stats_t, 1);
40 mc_stats->state_size = 1;
42 /* Create exploration stack */
43 mc_stack = xbt_fifo_new();
50 /* Save the initial state */
51 initial_snapshot = xbt_new0(s_mc_snapshot_t, 1);
52 MC_take_snapshot(initial_snapshot);
56 void MC_init_with_automaton(xbt_automaton_t a){
58 XBT_DEBUG("Start init mc");
60 mc_time = xbt_new0(double, simix_process_maxpid);
62 /* Initialize the data structures that must be persistent across every
63 iteration of the model-checker (in RAW memory) */
67 /* Initialize statistics */
68 mc_stats = xbt_new0(s_mc_stats_t, 1);
69 mc_stats->state_size = 1;
71 XBT_DEBUG("Creating snapshot_stack");
73 /* Create exploration stack */
74 mc_snapshot_stack = xbt_fifo_new();
82 void MC_modelcheck(void)
89 void MC_modelcheck_with_automaton(xbt_automaton_t a){
90 MC_init_with_automaton(a);
96 MC_print_statistics(mc_stats);
101 int MC_random(int min, int max)
103 /*FIXME: return mc_current_state->executed_transition->random.value;*/
108 * \brief Schedules all the process that are ready to run
110 void MC_wait_for_requests(void)
112 smx_process_t process;
116 while (xbt_dynar_length(simix_global->process_to_run)) {
117 SIMIX_process_runall();
118 xbt_dynar_foreach(simix_global->process_that_ran, iter, process) {
119 req = &process->request;
120 if (req->call != REQ_NO_REQ && !MC_request_is_visible(req))
121 SIMIX_request_pre(req, 0);
126 int MC_deadlock_check()
128 int deadlock = FALSE;
129 smx_process_t process;
130 if(xbt_swag_size(simix_global->process_list)){
132 xbt_swag_foreach(process, simix_global->process_list){
133 if(process->request.call != REQ_NO_REQ
134 && MC_request_is_enabled(&process->request)){
144 * \brief Re-executes from the initial state all the transitions indicated by
145 * a given model-checker stack.
146 * \param stack The stack with the transitions to execute.
148 void MC_replay(xbt_fifo_t stack)
152 smx_req_t req = NULL, saved_req = NULL;
153 xbt_fifo_item_t item;
156 XBT_DEBUG("**** Begin Replay ****");
158 /* Restore the initial state */
159 MC_restore_snapshot(initial_snapshot);
160 /* At the moment of taking the snapshot the raw heap was set, so restoring
161 * it will set it back again, we have to unset it to continue */
164 /* Traverse the stack from the initial state and re-execute the transitions */
165 for (item = xbt_fifo_get_last_item(stack);
166 item != xbt_fifo_get_first_item(stack);
167 item = xbt_fifo_get_prev_item(item)) {
169 state = (mc_state_t) xbt_fifo_get_item_content(item);
170 saved_req = MC_state_get_executed_request(state, &value);
173 /* because we got a copy of the executed request, we have to fetch the
174 real one, pointed by the request field of the issuer process */
175 req = &saved_req->issuer->request;
177 /* Debug information */
178 if(XBT_LOG_ISENABLED(mc_global, xbt_log_priority_debug)){
179 req_str = MC_request_to_string(req, value);
180 XBT_DEBUG("Replay: %s (%p)", req_str, state);
185 SIMIX_request_pre(req, value);
186 MC_wait_for_requests();
188 /* Update statistics */
189 mc_stats->visited_states++;
190 mc_stats->executed_transitions++;
192 XBT_DEBUG("**** End Replay ****");
196 * \brief Dumps the contents of a model-checker's stack and shows the actual
198 * \param stack The stack to dump
200 void MC_dump_stack(xbt_fifo_t stack)
204 MC_show_stack(stack);
207 while ((state = (mc_state_t) xbt_fifo_pop(stack)) != NULL)
208 MC_state_delete(state);
212 void MC_show_stack(xbt_fifo_t stack)
216 xbt_fifo_item_t item;
218 char *req_str = NULL;
220 for (item = xbt_fifo_get_last_item(stack);
221 (item ? (state = (mc_state_t) (xbt_fifo_get_item_content(item)))
222 : (NULL)); item = xbt_fifo_get_prev_item(item)) {
223 req = MC_state_get_executed_request(state, &value);
225 req_str = MC_request_to_string(req, value);
226 XBT_INFO("%s", req_str);
232 void MC_show_deadlock(smx_req_t req)
234 /*char *req_str = NULL;*/
235 XBT_INFO("**************************");
236 XBT_INFO("*** DEAD-LOCK DETECTED ***");
237 XBT_INFO("**************************");
238 XBT_INFO("Locked request:");
239 /*req_str = MC_request_to_string(req);
240 XBT_INFO("%s", req_str);
242 XBT_INFO("Counter-example execution trace:");
243 MC_dump_stack(mc_stack);
246 void MC_print_statistics(mc_stats_t stats)
248 XBT_INFO("State space size ~= %lu", stats->state_size);
249 XBT_INFO("Expanded states = %lu", stats->expanded_states);
250 XBT_INFO("Visited states = %lu", stats->visited_states);
251 XBT_INFO("Executed transitions = %lu", stats->executed_transitions);
252 XBT_INFO("Expanded / Visited = %lf",
253 (double) stats->visited_states / stats->expanded_states);
254 /*XBT_INFO("Exploration coverage = %lf",
255 (double)stats->expanded_states / stats->state_size); */
258 void MC_assert(int prop)
260 if (MC_IS_ENABLED && !prop) {
261 XBT_INFO("**************************");
262 XBT_INFO("*** PROPERTY NOT VALID ***");
263 XBT_INFO("**************************");
264 XBT_INFO("Counter-example execution trace:");
265 MC_dump_stack(mc_stack);
266 MC_print_statistics(mc_stats);
271 void MC_assert_pair(int prop){
272 if (MC_IS_ENABLED && !prop) {
273 XBT_INFO("**************************");
274 XBT_INFO("*** PROPERTY NOT VALID ***");
275 XBT_INFO("**************************");
276 XBT_INFO("Counter-example execution trace:");
277 MC_show_snapshot_stack(mc_snapshot_stack);
278 MC_dump_snapshot_stack(mc_snapshot_stack);
279 //MC_print_statistics(mc_stats);
284 void MC_process_clock_add(smx_process_t process, double amount)
286 mc_time[process->pid] += amount;
289 double MC_process_clock_get(smx_process_t process)
292 return mc_time[process->pid];