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;
66 xbt_fifo_t mc_stack_safety = NULL;
67 mc_stats_t mc_stats = NULL;
71 mc_stats_pair_t mc_stats_pair = NULL;
72 xbt_fifo_t mc_stack_liveness = NULL;
73 mc_snapshot_t initial_snapshot_liveness = NULL;
75 xbt_automaton_t _mc_property_automaton = NULL;
77 static void MC_assert_pair(int prop);
79 void MC_do_the_modelcheck_for_real() {
80 if (!_surf_mc_property_file || _surf_mc_property_file[0]=='\0') {
81 if (mc_reduce_kind==e_mc_reduce_unset)
82 mc_reduce_kind=e_mc_reduce_dpor;
84 XBT_INFO("Check a safety property");
89 if (mc_reduce_kind==e_mc_reduce_unset)
90 mc_reduce_kind=e_mc_reduce_none;
92 XBT_INFO("Check the liveness property %s",_surf_mc_property_file);
93 MC_automaton_load(_surf_mc_property_file);
94 MC_modelcheck_liveness();
99 * \brief Initialize the model-checker data structures
101 void MC_init_safety(void)
104 raw_mem_set = (mmalloc_get_current_heap() == raw_heap);
106 /* Check if MC is already initialized */
107 if (initial_snapshot)
110 mc_time = xbt_new0(double, simix_process_maxpid);
112 /* Initialize the data structures that must be persistent across every
113 iteration of the model-checker (in RAW memory) */
117 /* Initialize statistics */
118 mc_stats = xbt_new0(s_mc_stats_t, 1);
119 mc_stats->state_size = 1;
121 /* Create exploration stack */
122 mc_stack_safety = xbt_fifo_new();
129 /* Save the initial state */
130 initial_snapshot = xbt_new0(s_mc_snapshot_t, 1);
131 MC_take_snapshot(initial_snapshot);
142 void MC_modelcheck(void)
149 void MC_modelcheck_liveness(){
151 raw_mem_set = (mmalloc_get_current_heap() == raw_heap);
154 XBT_DEBUG("Start init mc");
156 mc_time = xbt_new0(double, simix_process_maxpid);
158 /* Initialize the data structures that must be persistent across every
159 iteration of the model-checker (in RAW memory) */
163 /* Initialize statistics */
164 mc_stats_pair = xbt_new0(s_mc_stats_pair_t, 1);
166 XBT_DEBUG("Creating stack");
168 /* Create exploration stack */
169 mc_stack_liveness = xbt_fifo_new();
177 MC_print_statistics_pairs(mc_stats_pair);
186 MC_print_statistics(mc_stats);
192 int MC_random(int min, int max)
194 /*FIXME: return mc_current_state->executed_transition->random.value;*/
199 * \brief Schedules all the process that are ready to run
201 void MC_wait_for_requests(void)
203 smx_process_t process;
207 while (!xbt_dynar_is_empty(simix_global->process_to_run)) {
208 SIMIX_process_runall();
209 xbt_dynar_foreach(simix_global->process_that_ran, iter, process) {
210 req = &process->simcall;
211 if (req->call != SIMCALL_NONE && !MC_request_is_visible(req))
212 SIMIX_simcall_pre(req, 0);
217 int MC_deadlock_check()
219 int deadlock = FALSE;
220 smx_process_t process;
221 if(xbt_swag_size(simix_global->process_list)){
223 xbt_swag_foreach(process, simix_global->process_list){
224 if(process->simcall.call != SIMCALL_NONE
225 && MC_request_is_enabled(&process->simcall)){
235 * \brief Re-executes from the state at position start all the transitions indicated by
236 * a given model-checker stack.
237 * \param stack The stack with the transitions to execute.
238 * \param start Start index to begin the re-execution.
240 void MC_replay(xbt_fifo_t stack, int start)
242 raw_mem_set = (mmalloc_get_current_heap() == raw_heap);
246 smx_simcall_t req = NULL, saved_req = NULL;
247 xbt_fifo_item_t item, start_item;
250 XBT_DEBUG("**** Begin Replay ****");
253 /* Restore the initial state */
254 MC_restore_snapshot(initial_snapshot);
255 /* At the moment of taking the snapshot the raw heap was set, so restoring
256 * it will set it back again, we have to unset it to continue */
260 start_item = xbt_fifo_get_last_item(stack);
263 start_item = xbt_fifo_get_prev_item(start_item);
268 /* Traverse the stack from the state at position start and re-execute the transitions */
269 for (item = start_item;
270 item != xbt_fifo_get_first_item(stack);
271 item = xbt_fifo_get_prev_item(item)) {
273 state = (mc_state_t) xbt_fifo_get_item_content(item);
274 saved_req = MC_state_get_executed_request(state, &value);
277 /* because we got a copy of the executed request, we have to fetch the
278 real one, pointed by the request field of the issuer process */
279 req = &saved_req->issuer->simcall;
281 /* Debug information */
282 if(XBT_LOG_ISENABLED(mc_global, xbt_log_priority_debug)){
283 req_str = MC_request_to_string(req, value);
284 XBT_DEBUG("Replay: %s (%p)", req_str, state);
289 SIMIX_simcall_pre(req, value);
290 MC_wait_for_requests();
292 /* Update statistics */
293 mc_stats->visited_states++;
294 mc_stats->executed_transitions++;
296 XBT_DEBUG("**** End Replay ****");
306 void MC_replay_liveness(xbt_fifo_t stack, int all_stack)
309 raw_mem_set = (mmalloc_get_current_heap() == raw_heap);
313 smx_simcall_t req = NULL, saved_req = NULL;
314 xbt_fifo_item_t item;
316 mc_pair_stateless_t pair;
319 XBT_DEBUG("**** Begin Replay ****");
321 /* Restore the initial state */
322 MC_restore_snapshot(initial_snapshot_liveness);
323 /* At the moment of taking the snapshot the raw heap was set, so restoring
324 * it will set it back again, we have to unset it to continue */
329 item = xbt_fifo_get_last_item(stack);
331 while(depth <= xbt_fifo_size(stack)){
333 pair = (mc_pair_stateless_t) xbt_fifo_get_item_content(item);
334 state = (mc_state_t) pair->graph_state;
336 if(pair->requests > 0){
338 saved_req = MC_state_get_executed_request(state, &value);
339 //XBT_DEBUG("SavedReq->call %u", saved_req->call);
341 if(saved_req != NULL){
342 /* because we got a copy of the executed request, we have to fetch the
343 real one, pointed by the request field of the issuer process */
344 req = &saved_req->issuer->simcall;
345 //XBT_DEBUG("Req->call %u", req->call);
347 /* Debug information */
348 if(XBT_LOG_ISENABLED(mc_global, xbt_log_priority_debug)){
349 req_str = MC_request_to_string(req, value);
350 XBT_DEBUG("Replay (depth = %d) : %s (%p)", depth, req_str, state);
356 SIMIX_simcall_pre(req, value);
357 MC_wait_for_requests();
362 /* Update statistics */
363 mc_stats_pair->visited_pairs++;
365 item = xbt_fifo_get_prev_item(item);
370 /* Traverse the stack from the initial state and re-execute the transitions */
371 for (item = xbt_fifo_get_last_item(stack);
372 item != xbt_fifo_get_first_item(stack);
373 item = xbt_fifo_get_prev_item(item)) {
375 pair = (mc_pair_stateless_t) xbt_fifo_get_item_content(item);
376 state = (mc_state_t) pair->graph_state;
378 if(pair->requests > 0){
380 saved_req = MC_state_get_executed_request(state, &value);
381 //XBT_DEBUG("SavedReq->call %u", saved_req->call);
383 if(saved_req != NULL){
384 /* because we got a copy of the executed request, we have to fetch the
385 real one, pointed by the request field of the issuer process */
386 req = &saved_req->issuer->simcall;
387 //XBT_DEBUG("Req->call %u", req->call);
389 /* Debug information */
390 if(XBT_LOG_ISENABLED(mc_global, xbt_log_priority_debug)){
391 req_str = MC_request_to_string(req, value);
392 XBT_DEBUG("Replay (depth = %d) : %s (%p)", depth, req_str, state);
398 SIMIX_simcall_pre(req, value);
399 MC_wait_for_requests();
404 /* Update statistics */
405 mc_stats_pair->visited_pairs++;
409 XBT_DEBUG("**** End Replay ****");
419 * \brief Dumps the contents of a model-checker's stack and shows the actual
421 * \param stack The stack to dump
423 void MC_dump_stack_safety(xbt_fifo_t stack)
426 raw_mem_set = (mmalloc_get_current_heap() == raw_heap);
428 MC_show_stack_safety(stack);
430 if(!_surf_mc_checkpoint){
435 while ((state = (mc_state_t) xbt_fifo_pop(stack)) != NULL)
436 MC_state_delete(state);
449 void MC_show_stack_safety(xbt_fifo_t stack)
453 xbt_fifo_item_t item;
455 char *req_str = NULL;
457 for (item = xbt_fifo_get_last_item(stack);
458 (item ? (state = (mc_state_t) (xbt_fifo_get_item_content(item)))
459 : (NULL)); item = xbt_fifo_get_prev_item(item)) {
460 req = MC_state_get_executed_request(state, &value);
462 req_str = MC_request_to_string(req, value);
463 XBT_INFO("%s", req_str);
469 void MC_show_deadlock(smx_simcall_t req)
471 /*char *req_str = NULL;*/
472 XBT_INFO("**************************");
473 XBT_INFO("*** DEAD-LOCK DETECTED ***");
474 XBT_INFO("**************************");
475 XBT_INFO("Locked request:");
476 /*req_str = MC_request_to_string(req);
477 XBT_INFO("%s", req_str);
479 XBT_INFO("Counter-example execution trace:");
480 MC_dump_stack_safety(mc_stack_safety);
484 void MC_show_stack_liveness(xbt_fifo_t stack){
486 mc_pair_stateless_t pair;
487 xbt_fifo_item_t item;
489 char *req_str = NULL;
491 for (item = xbt_fifo_get_last_item(stack);
492 (item ? (pair = (mc_pair_stateless_t) (xbt_fifo_get_item_content(item)))
493 : (NULL)); item = xbt_fifo_get_prev_item(item)) {
494 req = MC_state_get_executed_request(pair->graph_state, &value);
496 if(pair->requests>0){
497 req_str = MC_request_to_string(req, value);
498 XBT_INFO("%s", req_str);
501 XBT_INFO("End of system requests but evolution in Büchi automaton");
507 void MC_dump_stack_liveness(xbt_fifo_t stack){
509 raw_mem_set = (mmalloc_get_current_heap() == raw_heap);
511 mc_pair_stateless_t pair;
514 while ((pair = (mc_pair_stateless_t) xbt_fifo_pop(stack)) != NULL)
515 MC_pair_stateless_delete(pair);
526 void MC_print_statistics(mc_stats_t stats)
528 //XBT_INFO("State space size ~= %lu", stats->state_size);
529 XBT_INFO("Expanded states = %lu", stats->expanded_states);
530 XBT_INFO("Visited states = %lu", stats->visited_states);
531 XBT_INFO("Executed transitions = %lu", stats->executed_transitions);
532 XBT_INFO("Expanded / Visited = %lf",
533 (double) stats->visited_states / stats->expanded_states);
534 /*XBT_INFO("Exploration coverage = %lf",
535 (double)stats->expanded_states / stats->state_size); */
538 void MC_print_statistics_pairs(mc_stats_pair_t stats)
540 XBT_INFO("Expanded pairs = %lu", stats->expanded_pairs);
541 XBT_INFO("Visited pairs = %lu", stats->visited_pairs);
542 //XBT_INFO("Executed transitions = %lu", stats->executed_transitions);
543 XBT_INFO("Expanded / Visited = %lf",
544 (double) stats->visited_pairs / stats->expanded_pairs);
545 /*XBT_INFO("Exploration coverage = %lf",
546 (double)stats->expanded_states / stats->state_size); */
549 void MC_assert(int prop)
551 if (MC_IS_ENABLED && !prop){
552 XBT_INFO("**************************");
553 XBT_INFO("*** PROPERTY NOT VALID ***");
554 XBT_INFO("**************************");
555 XBT_INFO("Counter-example execution trace:");
556 MC_dump_stack_safety(mc_stack_safety);
557 MC_print_statistics(mc_stats);
562 static void MC_assert_pair(int prop){
563 if (MC_IS_ENABLED && !prop) {
564 XBT_INFO("**************************");
565 XBT_INFO("*** PROPERTY NOT VALID ***");
566 XBT_INFO("**************************");
567 //XBT_INFO("Counter-example execution trace:");
568 MC_show_stack_liveness(mc_stack_liveness);
569 //MC_dump_snapshot_stack(mc_snapshot_stack);
570 MC_print_statistics_pairs(mc_stats_pair);
575 void MC_process_clock_add(smx_process_t process, double amount)
577 mc_time[process->pid] += amount;
580 double MC_process_clock_get(smx_process_t process)
583 return mc_time[process->pid];
590 mc_snapshot_t sn = xbt_new0(s_mc_snapshot_t, 1);
591 MC_take_snapshot_liveness(sn);
595 XBT_INFO("Number of regions : %u", sn->num_reg);
597 for(i=0; i<sn->num_reg; i++){
599 switch(sn->regions[i]->type){
601 XBT_INFO("Size of heap : %zu", sn->regions[i]->size);
602 mmalloc_display_info_heap(sn->regions[i]->data);
604 case 1 : /* libsimgrid */
605 XBT_INFO("Size of libsimgrid : %zu", sn->regions[i]->size);
607 case 2 : /* data program */
608 XBT_INFO("Size of data program : %zu", sn->regions[i]->size);
611 XBT_INFO("Size of stack : %zu", sn->regions[i]->size);
612 XBT_INFO("Start addr of stack : %p", sn->regions[i]->start_addr);
620 void MC_automaton_load(const char *file){
622 raw_mem_set = (mmalloc_get_current_heap() == raw_heap);
626 if (_mc_property_automaton == NULL)
627 _mc_property_automaton = xbt_automaton_new();
629 xbt_automaton_load(_mc_property_automaton,file);
640 void MC_automaton_new_propositional_symbol(const char* id, void* fct) {
642 raw_mem_set = (mmalloc_get_current_heap() == raw_heap);
646 if (_mc_property_automaton == NULL)
647 _mc_property_automaton = xbt_automaton_new();
649 xbt_new_propositional_symbol(_mc_property_automaton,id,fct);