1 /* Copyright (c) 2008-2012 Da SimGrid Team. All rights reserved. */
3 /* This program is free software; you can redistribute it and/or modify it
4 * under the terms of the license (GNU LGPL) which comes with this package. */
11 #include "../surf/surf_private.h"
12 #include "../simix/smx_private.h"
14 #include "mc_private.h"
15 #include "xbt/automaton.h"
17 XBT_LOG_NEW_CATEGORY(mc, "All MC categories");
18 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_global, mc,
19 "Logging specific to MC (global)");
21 /* Configuration support */
22 e_mc_reduce_t mc_reduce_kind=e_mc_reduce_unset;
24 extern int _surf_init_status;
25 void _mc_cfg_cb_reduce(const char *name, int pos) {
26 if (_surf_init_status && !_surf_do_model_check) {
27 xbt_die("You are specifying a reduction strategy after the initialization (through MSG_config?), but model-checking was not activated at config time (through --cfg=model-check:1). This won't work, sorry.");
29 char *val= xbt_cfg_get_string(_surf_cfg_set, name);
30 if (!strcasecmp(val,"none")) {
31 mc_reduce_kind = e_mc_reduce_none;
32 } else if (!strcasecmp(val,"dpor")) {
33 mc_reduce_kind = e_mc_reduce_dpor;
35 xbt_die("configuration option %s can only take 'none' or 'dpor' as a value",name);
37 xbt_cfg_set_int(_surf_cfg_set,"model-check",1);
40 void _mc_cfg_cb_checkpoint(const char *name, int pos) {
41 if (_surf_init_status && !_surf_do_model_check) {
42 xbt_die("You are specifying a checkpointing value after the initialization (through MSG_config?), but model-checking was not activated at config time (through --cfg=model-check:1). This won't work, sorry.");
44 _surf_mc_checkpoint = xbt_cfg_get_int(_surf_cfg_set, name);
45 xbt_cfg_set_int(_surf_cfg_set,"model-check",1);
47 void _mc_cfg_cb_property(const char *name, int pos) {
48 if (_surf_init_status && !_surf_do_model_check) {
49 xbt_die("You are specifying a property after the initialization (through MSG_config?), but model-checking was not activated at config time (through --cfg=model-check:1). This won't work, sorry.");
51 _surf_mc_property_file= xbt_cfg_get_string(_surf_cfg_set, name);
52 xbt_cfg_set_int(_surf_cfg_set,"model-check",1);
56 /* MC global data structures */
58 mc_state_t mc_current_state = NULL;
59 char mc_replay_mode = FALSE;
60 double *mc_time = NULL;
61 mc_snapshot_t initial_snapshot = NULL;
65 xbt_fifo_t mc_stack_safety = NULL;
66 mc_stats_t mc_stats = NULL;
70 mc_stats_pair_t mc_stats_pair = NULL;
71 xbt_fifo_t mc_stack_liveness = NULL;
72 mc_snapshot_t initial_snapshot_liveness = NULL;
74 xbt_automaton_t _mc_property_automaton = NULL;
76 static void MC_assert_pair(int prop);
78 void MC_do_the_modelcheck_for_real() {
79 if (!_surf_mc_property_file || _surf_mc_property_file[0]=='\0') {
80 if (mc_reduce_kind==e_mc_reduce_unset)
81 mc_reduce_kind=e_mc_reduce_dpor;
83 XBT_INFO("Check a safety property");
88 if (mc_reduce_kind==e_mc_reduce_unset)
89 mc_reduce_kind=e_mc_reduce_none;
91 XBT_INFO("Check the liveness property %s",_surf_mc_property_file);
92 MC_automaton_load(_surf_mc_property_file);
93 MC_modelcheck_liveness();
98 * \brief Initialize the model-checker data structures
100 void MC_init_safety(void)
103 raw_mem_set = (mmalloc_get_current_heap() == raw_heap);
105 /* Check if MC is already initialized */
106 if (initial_snapshot)
109 mc_time = xbt_new0(double, simix_process_maxpid);
111 /* Initialize the data structures that must be persistent across every
112 iteration of the model-checker (in RAW memory) */
116 /* Initialize statistics */
117 mc_stats = xbt_new0(s_mc_stats_t, 1);
118 mc_stats->state_size = 1;
120 /* Create exploration stack */
121 mc_stack_safety = xbt_fifo_new();
128 /* Save the initial state */
129 initial_snapshot = xbt_new0(s_mc_snapshot_t, 1);
130 MC_take_snapshot(initial_snapshot);
141 void MC_modelcheck(void)
148 void MC_modelcheck_liveness(){
150 raw_mem_set = (mmalloc_get_current_heap() == raw_heap);
153 XBT_DEBUG("Start init mc");
155 mc_time = xbt_new0(double, simix_process_maxpid);
157 /* Initialize the data structures that must be persistent across every
158 iteration of the model-checker (in RAW memory) */
162 /* Initialize statistics */
163 mc_stats_pair = xbt_new0(s_mc_stats_pair_t, 1);
165 XBT_DEBUG("Creating stack");
167 /* Create exploration stack */
168 mc_stack_liveness = xbt_fifo_new();
176 MC_print_statistics_pairs(mc_stats_pair);
185 MC_print_statistics(mc_stats);
191 int MC_random(int min, int max)
193 /*FIXME: return mc_current_state->executed_transition->random.value;*/
198 * \brief Schedules all the process that are ready to run
200 void MC_wait_for_requests(void)
202 smx_process_t process;
206 while (!xbt_dynar_is_empty(simix_global->process_to_run)) {
207 SIMIX_process_runall();
208 xbt_dynar_foreach(simix_global->process_that_ran, iter, process) {
209 req = &process->simcall;
210 if (req->call != SIMCALL_NONE && !MC_request_is_visible(req))
211 SIMIX_simcall_pre(req, 0);
216 int MC_deadlock_check()
218 int deadlock = FALSE;
219 smx_process_t process;
220 if(xbt_swag_size(simix_global->process_list)){
222 xbt_swag_foreach(process, simix_global->process_list){
223 if(process->simcall.call != SIMCALL_NONE
224 && MC_request_is_enabled(&process->simcall)){
234 * \brief Re-executes from the state at position start all the transitions indicated by
235 * a given model-checker stack.
236 * \param stack The stack with the transitions to execute.
237 * \param start Start index to begin the re-execution.
239 void MC_replay(xbt_fifo_t stack, int start)
241 raw_mem_set = (mmalloc_get_current_heap() == raw_heap);
245 smx_simcall_t req = NULL, saved_req = NULL;
246 xbt_fifo_item_t item, start_item;
249 XBT_DEBUG("**** Begin Replay ****");
252 /* Restore the initial state */
253 MC_restore_snapshot(initial_snapshot);
254 /* At the moment of taking the snapshot the raw heap was set, so restoring
255 * it will set it back again, we have to unset it to continue */
259 start_item = xbt_fifo_get_last_item(stack);
262 start_item = xbt_fifo_get_prev_item(start_item);
267 /* Traverse the stack from the state at position start and re-execute the transitions */
268 for (item = start_item;
269 item != xbt_fifo_get_first_item(stack);
270 item = xbt_fifo_get_prev_item(item)) {
272 state = (mc_state_t) xbt_fifo_get_item_content(item);
273 saved_req = MC_state_get_executed_request(state, &value);
276 /* because we got a copy of the executed request, we have to fetch the
277 real one, pointed by the request field of the issuer process */
278 req = &saved_req->issuer->simcall;
280 /* Debug information */
281 if(XBT_LOG_ISENABLED(mc_global, xbt_log_priority_debug)){
282 req_str = MC_request_to_string(req, value);
283 XBT_DEBUG("Replay: %s (%p)", req_str, state);
288 SIMIX_simcall_pre(req, value);
289 MC_wait_for_requests();
291 /* Update statistics */
292 mc_stats->visited_states++;
293 mc_stats->executed_transitions++;
295 XBT_DEBUG("**** End Replay ****");
305 void MC_replay_liveness(xbt_fifo_t stack, int all_stack)
308 raw_mem_set = (mmalloc_get_current_heap() == raw_heap);
312 smx_simcall_t req = NULL, saved_req = NULL;
313 xbt_fifo_item_t item;
315 mc_pair_stateless_t pair;
318 XBT_DEBUG("**** Begin Replay ****");
320 /* Restore the initial state */
321 MC_restore_snapshot(initial_snapshot_liveness);
322 /* At the moment of taking the snapshot the raw heap was set, so restoring
323 * it will set it back again, we have to unset it to continue */
328 item = xbt_fifo_get_last_item(stack);
330 while(depth <= xbt_fifo_size(stack)){
332 pair = (mc_pair_stateless_t) xbt_fifo_get_item_content(item);
333 state = (mc_state_t) pair->graph_state;
335 if(pair->requests > 0){
337 saved_req = MC_state_get_executed_request(state, &value);
338 //XBT_DEBUG("SavedReq->call %u", saved_req->call);
340 if(saved_req != NULL){
341 /* because we got a copy of the executed request, we have to fetch the
342 real one, pointed by the request field of the issuer process */
343 req = &saved_req->issuer->simcall;
344 //XBT_DEBUG("Req->call %u", req->call);
346 /* Debug information */
347 if(XBT_LOG_ISENABLED(mc_global, xbt_log_priority_debug)){
348 req_str = MC_request_to_string(req, value);
349 XBT_DEBUG("Replay (depth = %d) : %s (%p)", depth, req_str, state);
355 SIMIX_simcall_pre(req, value);
356 MC_wait_for_requests();
361 /* Update statistics */
362 mc_stats_pair->visited_pairs++;
364 item = xbt_fifo_get_prev_item(item);
369 /* Traverse the stack from the initial state and re-execute the transitions */
370 for (item = xbt_fifo_get_last_item(stack);
371 item != xbt_fifo_get_first_item(stack);
372 item = xbt_fifo_get_prev_item(item)) {
374 pair = (mc_pair_stateless_t) xbt_fifo_get_item_content(item);
375 state = (mc_state_t) pair->graph_state;
377 if(pair->requests > 0){
379 saved_req = MC_state_get_executed_request(state, &value);
380 //XBT_DEBUG("SavedReq->call %u", saved_req->call);
382 if(saved_req != NULL){
383 /* because we got a copy of the executed request, we have to fetch the
384 real one, pointed by the request field of the issuer process */
385 req = &saved_req->issuer->simcall;
386 //XBT_DEBUG("Req->call %u", req->call);
388 /* Debug information */
389 if(XBT_LOG_ISENABLED(mc_global, xbt_log_priority_debug)){
390 req_str = MC_request_to_string(req, value);
391 XBT_DEBUG("Replay (depth = %d) : %s (%p)", depth, req_str, state);
397 SIMIX_simcall_pre(req, value);
398 MC_wait_for_requests();
403 /* Update statistics */
404 mc_stats_pair->visited_pairs++;
408 XBT_DEBUG("**** End Replay ****");
418 * \brief Dumps the contents of a model-checker's stack and shows the actual
420 * \param stack The stack to dump
422 void MC_dump_stack_safety(xbt_fifo_t stack)
425 raw_mem_set = (mmalloc_get_current_heap() == raw_heap);
427 MC_show_stack_safety(stack);
429 if(!_surf_mc_checkpoint){
434 while ((state = (mc_state_t) xbt_fifo_pop(stack)) != NULL)
435 MC_state_delete(state);
448 void MC_show_stack_safety(xbt_fifo_t stack)
452 xbt_fifo_item_t item;
454 char *req_str = NULL;
456 for (item = xbt_fifo_get_last_item(stack);
457 (item ? (state = (mc_state_t) (xbt_fifo_get_item_content(item)))
458 : (NULL)); item = xbt_fifo_get_prev_item(item)) {
459 req = MC_state_get_executed_request(state, &value);
461 req_str = MC_request_to_string(req, value);
462 XBT_INFO("%s", req_str);
468 void MC_show_deadlock(smx_simcall_t req)
470 /*char *req_str = NULL;*/
471 XBT_INFO("**************************");
472 XBT_INFO("*** DEAD-LOCK DETECTED ***");
473 XBT_INFO("**************************");
474 XBT_INFO("Locked request:");
475 /*req_str = MC_request_to_string(req);
476 XBT_INFO("%s", req_str);
478 XBT_INFO("Counter-example execution trace:");
479 MC_dump_stack_safety(mc_stack_safety);
483 void MC_show_stack_liveness(xbt_fifo_t stack){
485 mc_pair_stateless_t pair;
486 xbt_fifo_item_t item;
488 char *req_str = NULL;
490 for (item = xbt_fifo_get_last_item(stack);
491 (item ? (pair = (mc_pair_stateless_t) (xbt_fifo_get_item_content(item)))
492 : (NULL)); item = xbt_fifo_get_prev_item(item)) {
493 req = MC_state_get_executed_request(pair->graph_state, &value);
495 if(pair->requests>0){
496 req_str = MC_request_to_string(req, value);
497 XBT_INFO("%s", req_str);
500 XBT_INFO("End of system requests but evolution in Büchi automaton");
506 void MC_dump_stack_liveness(xbt_fifo_t stack){
508 raw_mem_set = (mmalloc_get_current_heap() == raw_heap);
510 mc_pair_stateless_t pair;
513 while ((pair = (mc_pair_stateless_t) xbt_fifo_pop(stack)) != NULL)
514 MC_pair_stateless_delete(pair);
525 void MC_print_statistics(mc_stats_t stats)
527 //XBT_INFO("State space size ~= %lu", stats->state_size);
528 XBT_INFO("Expanded states = %lu", stats->expanded_states);
529 XBT_INFO("Visited states = %lu", stats->visited_states);
530 XBT_INFO("Executed transitions = %lu", stats->executed_transitions);
531 XBT_INFO("Expanded / Visited = %lf",
532 (double) stats->visited_states / stats->expanded_states);
533 /*XBT_INFO("Exploration coverage = %lf",
534 (double)stats->expanded_states / stats->state_size); */
537 void MC_print_statistics_pairs(mc_stats_pair_t stats)
539 XBT_INFO("Expanded pairs = %lu", stats->expanded_pairs);
540 XBT_INFO("Visited pairs = %lu", stats->visited_pairs);
541 //XBT_INFO("Executed transitions = %lu", stats->executed_transitions);
542 XBT_INFO("Expanded / Visited = %lf",
543 (double) stats->visited_pairs / stats->expanded_pairs);
544 /*XBT_INFO("Exploration coverage = %lf",
545 (double)stats->expanded_states / stats->state_size); */
548 void MC_assert(int prop)
550 if (MC_IS_ENABLED && !prop){
551 XBT_INFO("**************************");
552 XBT_INFO("*** PROPERTY NOT VALID ***");
553 XBT_INFO("**************************");
554 XBT_INFO("Counter-example execution trace:");
555 MC_dump_stack_safety(mc_stack_safety);
556 MC_print_statistics(mc_stats);
561 static void MC_assert_pair(int prop){
562 if (MC_IS_ENABLED && !prop) {
563 XBT_INFO("**************************");
564 XBT_INFO("*** PROPERTY NOT VALID ***");
565 XBT_INFO("**************************");
566 //XBT_INFO("Counter-example execution trace:");
567 MC_show_stack_liveness(mc_stack_liveness);
568 //MC_dump_snapshot_stack(mc_snapshot_stack);
569 MC_print_statistics_pairs(mc_stats_pair);
574 void MC_process_clock_add(smx_process_t process, double amount)
576 mc_time[process->pid] += amount;
579 double MC_process_clock_get(smx_process_t process)
582 return mc_time[process->pid];
589 mc_snapshot_t sn = xbt_new0(s_mc_snapshot_t, 1);
590 MC_take_snapshot_liveness(sn);
594 XBT_INFO("Number of regions : %u", sn->num_reg);
596 for(i=0; i<sn->num_reg; i++){
598 switch(sn->regions[i]->type){
600 XBT_INFO("Size of heap : %zu", sn->regions[i]->size);
601 mmalloc_display_info_heap(sn->regions[i]->data);
603 case 1 : /* libsimgrid */
604 XBT_INFO("Size of libsimgrid : %zu", sn->regions[i]->size);
606 case 2 : /* data program */
607 XBT_INFO("Size of data program : %zu", sn->regions[i]->size);
610 XBT_INFO("Size of stack : %zu", sn->regions[i]->size);
611 XBT_INFO("Start addr of stack : %p", sn->regions[i]->start_addr);
619 void MC_automaton_load(const char *file){
621 raw_mem_set = (mmalloc_get_current_heap() == raw_heap);
625 if (_mc_property_automaton == NULL)
626 _mc_property_automaton = xbt_automaton_new();
628 xbt_automaton_load(_mc_property_automaton,file);
639 void MC_automaton_new_propositional_symbol(const char* id, void* fct) {
641 raw_mem_set = (mmalloc_get_current_heap() == raw_heap);
645 if (_mc_property_automaton == NULL)
646 _mc_property_automaton = xbt_automaton_new();
648 xbt_new_propositional_symbol(_mc_property_automaton,id,fct);