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 mc_time = xbt_new0(double, simix_process_maxpid);
60 /* Initialize the data structures that must be persistent across every
61 iteration of the model-checker (in RAW memory) */
64 /* Initialize statistics */
65 mc_stats = xbt_new0(s_mc_stats_t, 1);
66 mc_stats->state_size = 1;
68 XBT_DEBUG("Creating snapshot_stack");
70 /* Create exploration stack */
71 mc_snapshot_stack = xbt_fifo_new();
79 void MC_modelcheck(void)
86 void MC_modelcheck_with_automaton(xbt_automaton_t a){
87 MC_init_with_automaton(a);
93 MC_print_statistics(mc_stats);
98 int MC_random(int min, int max)
100 /*FIXME: return mc_current_state->executed_transition->random.value;*/
105 * \brief Schedules all the process that are ready to run
107 void MC_wait_for_requests(void)
109 smx_process_t process;
113 while (xbt_dynar_length(simix_global->process_to_run)) {
114 SIMIX_process_runall();
115 xbt_dynar_foreach(simix_global->process_that_ran, iter, process) {
116 req = &process->request;
117 if (req->call != REQ_NO_REQ && !MC_request_is_visible(req))
118 SIMIX_request_pre(req, 0);
123 int MC_deadlock_check()
125 int deadlock = FALSE;
126 smx_process_t process;
127 if(xbt_swag_size(simix_global->process_list)){
129 xbt_swag_foreach(process, simix_global->process_list){
130 if(process->request.call != REQ_NO_REQ
131 && MC_request_is_enabled(&process->request)){
141 * \brief Re-executes from the initial state all the transitions indicated by
142 * a given model-checker stack.
143 * \param stack The stack with the transitions to execute.
145 void MC_replay(xbt_fifo_t stack)
149 smx_req_t req = NULL, saved_req = NULL;
150 xbt_fifo_item_t item;
153 XBT_DEBUG("**** Begin Replay ****");
155 /* Restore the initial state */
156 MC_restore_snapshot(initial_snapshot);
157 /* At the moment of taking the snapshot the raw heap was set, so restoring
158 * it will set it back again, we have to unset it to continue */
161 /* Traverse the stack from the initial state and re-execute the transitions */
162 for (item = xbt_fifo_get_last_item(stack);
163 item != xbt_fifo_get_first_item(stack);
164 item = xbt_fifo_get_prev_item(item)) {
166 state = (mc_state_t) xbt_fifo_get_item_content(item);
167 saved_req = MC_state_get_executed_request(state, &value);
170 /* because we got a copy of the executed request, we have to fetch the
171 real one, pointed by the request field of the issuer process */
172 req = &saved_req->issuer->request;
174 /* Debug information */
175 if(XBT_LOG_ISENABLED(mc_global, xbt_log_priority_debug)){
176 req_str = MC_request_to_string(req, value);
177 XBT_DEBUG("Replay: %s (%p)", req_str, state);
182 SIMIX_request_pre(req, value);
183 MC_wait_for_requests();
185 /* Update statistics */
186 mc_stats->visited_states++;
187 mc_stats->executed_transitions++;
189 XBT_DEBUG("**** End Replay ****");
193 * \brief Dumps the contents of a model-checker's stack and shows the actual
195 * \param stack The stack to dump
197 void MC_dump_stack(xbt_fifo_t stack)
201 MC_show_stack(stack);
204 while ((state = (mc_state_t) xbt_fifo_pop(stack)) != NULL)
205 MC_state_delete(state);
209 void MC_show_stack(xbt_fifo_t stack)
213 xbt_fifo_item_t item;
215 char *req_str = NULL;
217 for (item = xbt_fifo_get_last_item(stack);
218 (item ? (state = (mc_state_t) (xbt_fifo_get_item_content(item)))
219 : (NULL)); item = xbt_fifo_get_prev_item(item)) {
220 req = MC_state_get_executed_request(state, &value);
222 req_str = MC_request_to_string(req, value);
223 XBT_INFO("%s", req_str);
229 void MC_show_deadlock(smx_req_t req)
231 /*char *req_str = NULL;*/
232 XBT_INFO("**************************");
233 XBT_INFO("*** DEAD-LOCK DETECTED ***");
234 XBT_INFO("**************************");
235 XBT_INFO("Locked request:");
236 /*req_str = MC_request_to_string(req);
237 XBT_INFO("%s", req_str);
239 XBT_INFO("Counter-example execution trace:");
240 MC_dump_stack(mc_stack);
243 void MC_print_statistics(mc_stats_t stats)
245 XBT_INFO("State space size ~= %lu", stats->state_size);
246 XBT_INFO("Expanded states = %lu", stats->expanded_states);
247 XBT_INFO("Visited states = %lu", stats->visited_states);
248 XBT_INFO("Executed transitions = %lu", stats->executed_transitions);
249 XBT_INFO("Expanded / Visited = %lf",
250 (double) stats->visited_states / stats->expanded_states);
251 /*XBT_INFO("Exploration coverage = %lf",
252 (double)stats->expanded_states / stats->state_size); */
255 void MC_assert(int prop)
257 if (MC_IS_ENABLED && !prop) {
258 XBT_INFO("**************************");
259 XBT_INFO("*** PROPERTY NOT VALID ***");
260 XBT_INFO("**************************");
261 XBT_INFO("Counter-example execution trace:");
262 MC_dump_stack(mc_stack);
263 MC_print_statistics(mc_stats);
268 void MC_process_clock_add(smx_process_t process, double amount)
270 mc_time[process->pid] += amount;
273 double MC_process_clock_get(smx_process_t process)
276 return mc_time[process->pid];