1 /* Copyright (c) 2008-2014. The SimGrid Team.
2 * All rights reserved. */
4 /* This program is free software; you can redistribute it and/or modify it
5 * under the terms of the license (GNU LGPL) which comes with this package. */
11 #include <sys/types.h>
18 #include "simgrid/sg_config.h"
19 #include "../surf/surf_private.h"
20 #include "../simix/smx_private.h"
22 #include "xbt/automaton.h"
26 #define UNW_LOCAL_ONLY
27 #include <libunwind.h>
29 #include "../xbt/mmalloc/mmprivate.h"
30 #include "mc_object_info.h"
31 #include "mc_comm_pattern.h"
32 #include "mc_request.h"
33 #include "mc_safety.h"
34 #include "mc_memory_map.h"
35 #include "mc_snapshot.h"
36 #include "mc_liveness.h"
37 #include "mc_private.h"
39 #include "mc_record.h"
41 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_global, mc,
42 "Logging specific to MC (global)");
44 double *mc_time = NULL;
47 int user_max_depth_reached = 0;
49 /* MC global data structures */
50 mc_state_t mc_current_state = NULL;
51 char mc_replay_mode = FALSE;
53 __thread mc_comparison_times_t mc_comp_times = NULL;
54 __thread double mc_snapshot_comparison_time;
55 mc_stats_t mc_stats = NULL;
56 mc_global_t initial_global_state = NULL;
57 xbt_fifo_t mc_stack = NULL;
60 xbt_automaton_t _mc_property_automaton = NULL;
63 mc_object_info_t mc_libsimgrid_info = NULL;
64 mc_object_info_t mc_binary_info = NULL;
66 mc_object_info_t mc_object_infos[2] = { NULL, NULL };
68 size_t mc_object_infos_size = 2;
71 FILE *dot_output = NULL;
72 const char *colors[13];
75 /******************************* Initialisation of MC *******************************/
76 /*********************************************************************************/
78 static void MC_init_dot_output()
79 { /* FIXME : more colors */
84 colors[3] = "goldenrod";
87 colors[6] = "magenta";
88 colors[7] = "turquoise4";
90 colors[9] = "forestgreen";
91 colors[10] = "hotpink";
92 colors[11] = "lightblue";
95 dot_output = fopen(_sg_mc_dot_output_file, "w");
97 if (dot_output == NULL) {
98 perror("Error open dot output file");
103 "digraph graphname{\n fixedsize=true; rankdir=TB; ranksep=.25; edge [fontsize=12]; node [fontsize=10, shape=circle,width=.5 ]; graph [resolution=20, fontsize=10];\n");
107 static void MC_init_debug_info(void)
109 XBT_INFO("Get debug information ...");
111 memory_map_t maps = MC_get_memory_map();
113 /* Get local variables for state equality detection */
114 mc_binary_info = MC_find_object_info(maps, xbt_binary_name, 1);
115 mc_object_infos[0] = mc_binary_info;
117 mc_libsimgrid_info = MC_find_object_info(maps, libsimgrid_path, 0);
118 mc_object_infos[1] = mc_libsimgrid_info;
120 // Use information of the other objects:
121 MC_post_process_object_info(mc_binary_info);
122 MC_post_process_object_info(mc_libsimgrid_info);
124 MC_free_memory_map(maps);
125 XBT_INFO("Get debug information done !");
129 mc_model_checker_t mc_model_checker = NULL;
131 mc_model_checker_t MC_model_checker_new()
133 mc_model_checker_t mc = xbt_new0(s_mc_model_checker_t, 1);
134 mc->pages = mc_pages_store_new();
135 mc->fd_clear_refs = -1;
140 void MC_model_checker_delete(mc_model_checker_t mc) {
141 mc_pages_store_delete(mc->pages);
143 xbt_dynar_free(&mc->record);
148 int raw_mem_set = (mmalloc_get_current_heap() == mc_heap);
150 mc_time = xbt_new0(double, simix_process_maxpid);
152 /* Initialize the data structures that must be persistent across every
153 iteration of the model-checker (in RAW memory) */
157 mc_model_checker = MC_model_checker_new();
159 mc_comp_times = xbt_new0(s_mc_comparison_times_t, 1);
161 /* Initialize statistics */
162 mc_stats = xbt_new0(s_mc_stats_t, 1);
163 mc_stats->state_size = 1;
165 MC_init_memory_map_info();
166 MC_init_debug_info(); /* FIXME : get debug information only if liveness verification or visited state reduction */
168 if ((_sg_mc_dot_output_file != NULL) && (_sg_mc_dot_output_file[0] != '\0'))
169 MC_init_dot_output();
172 //parmap = xbt_parmap_mc_new(xbt_os_get_numcores(), XBT_PARMAP_DEFAULT);
176 if (_sg_mc_visited > 0 || _sg_mc_liveness) {
177 /* Ignore some variables from xbt/ex.h used by exception e for stacks comparison */
178 MC_ignore_local_variable("e", "*");
179 MC_ignore_local_variable("__ex_cleanup", "*");
180 MC_ignore_local_variable("__ex_mctx_en", "*");
181 MC_ignore_local_variable("__ex_mctx_me", "*");
182 MC_ignore_local_variable("__xbt_ex_ctx_ptr", "*");
183 MC_ignore_local_variable("_log_ev", "*");
184 MC_ignore_local_variable("_throw_ctx", "*");
185 MC_ignore_local_variable("ctx", "*");
187 MC_ignore_local_variable("self", "simcall_BODY_mc_snapshot");
188 MC_ignore_local_variable("next_cont"
189 "ext", "smx_ctx_sysv_suspend_serial");
190 MC_ignore_local_variable("i", "smx_ctx_sysv_suspend_serial");
192 /* Ignore local variable about time used for tracing */
193 MC_ignore_local_variable("start_time", "*");
196 MC_ignore_global_variable("mc_model_checker");
197 MC_ignore_global_variable("initial_communications_pattern");
198 MC_ignore_global_variable("incomplete_communications_pattern");
199 MC_ignore_global_variable("nb_comm_pattern");
201 /* MC __thread variables: */
202 MC_ignore_global_variable("mc_diff_info");
203 MC_ignore_global_variable("mc_comp_times");
204 MC_ignore_global_variable("mc_snapshot_comparison_time");
206 /* This MC state is used in MC replay as well: */
207 MC_ignore_global_variable("mc_time");
209 /* Static variable used for tracing */
210 MC_ignore_global_variable("counter");
213 MC_ignore_global_variable("smx_total_comms");
215 MC_ignore_heap(mc_time, simix_process_maxpid * sizeof(double));
217 smx_process_t process;
218 xbt_swag_foreach(process, simix_global->process_list) {
219 MC_ignore_heap(&(process->process_hookup), sizeof(process->process_hookup));
228 /******************************* Core of MC *******************************/
229 /**************************************************************************/
231 static void MC_modelcheck_comm_determinism_init(void)
234 int mc_mem_set = (mmalloc_get_current_heap() == mc_heap);
241 /* Create exploration stack */
242 mc_stack = xbt_fifo_new();
246 MC_pre_modelcheck_comm_determinism();
249 initial_global_state = xbt_new0(s_mc_global_t, 1);
250 initial_global_state->snapshot = MC_take_snapshot(0);
251 initial_global_state->initial_communications_pattern_done = 0;
252 initial_global_state->comm_deterministic = 1;
253 initial_global_state->send_deterministic = 1;
256 MC_modelcheck_comm_determinism();
263 static void MC_modelcheck_safety_init(void)
265 int mc_mem_set = (mmalloc_get_current_heap() == mc_heap);
274 /* Create exploration stack */
275 mc_stack = xbt_fifo_new();
279 MC_pre_modelcheck_safety();
282 /* Save the initial state */
283 initial_global_state = xbt_new0(s_mc_global_t, 1);
284 initial_global_state->snapshot = MC_take_snapshot(0);
287 MC_modelcheck_safety();
296 static void MC_modelcheck_liveness_init()
299 int mc_mem_set = (mmalloc_get_current_heap() == mc_heap);
308 /* Create exploration stack */
309 mc_stack = xbt_fifo_new();
311 /* Create the initial state */
312 initial_global_state = xbt_new0(s_mc_global_t, 1);
316 MC_pre_modelcheck_liveness();
319 MC_print_statistics(mc_stats);
327 void MC_do_the_modelcheck_for_real()
330 if (_sg_mc_comms_determinism || _sg_mc_send_determinism) {
331 XBT_INFO("Check communication determinism");
332 MC_modelcheck_comm_determinism_init();
333 } else if (!_sg_mc_property_file || _sg_mc_property_file[0] == '\0') {
334 if (mc_reduce_kind == e_mc_reduce_unset)
335 mc_reduce_kind = e_mc_reduce_dpor;
336 XBT_INFO("Check a safety property");
337 MC_modelcheck_safety_init();
339 if (mc_reduce_kind == e_mc_reduce_unset)
340 mc_reduce_kind = e_mc_reduce_none;
341 XBT_INFO("Check the liveness property %s", _sg_mc_property_file);
342 MC_automaton_load(_sg_mc_property_file);
343 MC_modelcheck_liveness_init();
356 int MC_deadlock_check()
358 int deadlock = FALSE;
359 smx_process_t process;
360 if (xbt_swag_size(simix_global->process_list)) {
362 xbt_swag_foreach(process, simix_global->process_list) {
363 if (MC_request_is_enabled(&process->simcall)) {
372 void handle_comm_pattern(e_mc_call_type_t call_type, smx_simcall_t req, int value, xbt_dynar_t pattern, int backtracking) {
375 case MC_CALL_TYPE_NONE:
377 case MC_CALL_TYPE_SEND:
378 case MC_CALL_TYPE_RECV:
379 get_comm_pattern(pattern, req, call_type);
381 case MC_CALL_TYPE_WAIT:
382 case MC_CALL_TYPE_WAITANY:
384 smx_synchro_t current_comm = NULL;
385 if (call_type == MC_CALL_TYPE_WAIT)
386 current_comm = simcall_comm_wait__get__comm(req);
388 current_comm = xbt_dynar_get_as(simcall_comm_waitany__get__comms(req), value, smx_synchro_t);
389 // First wait only must be considered:
390 if (current_comm->comm.refcount == 1)
391 complete_comm_pattern(pattern, current_comm, backtracking);
395 xbt_die("Unexpected call type %i", (int)call_type);
400 static void MC_restore_communications_pattern(mc_state_t state) {
401 mc_list_comm_pattern_t list_process_comm;
402 unsigned int cursor, cursor2;
403 xbt_dynar_foreach(initial_communications_pattern, cursor, list_process_comm){
404 list_process_comm->index_comm = (int)xbt_dynar_get_as(state->index_comm, cursor, int);
406 mc_comm_pattern_t comm;
408 xbt_dynar_t initial_incomplete_process_comms, incomplete_process_comms;
409 for(int i=0; i<simix_process_maxpid; i++){
410 initial_incomplete_process_comms = xbt_dynar_get_as(incomplete_communications_pattern, i, xbt_dynar_t);
411 xbt_dynar_reset(initial_incomplete_process_comms);
412 incomplete_process_comms = xbt_dynar_get_as(state->incomplete_comm_pattern, i, xbt_dynar_t);
413 xbt_dynar_foreach(incomplete_process_comms, cursor2, comm) {
414 mc_comm_pattern_t copy_comm = xbt_new0(s_mc_comm_pattern_t, 1);
415 copy_comm->index = comm->index;
416 copy_comm->type = comm->type;
417 copy_comm->comm = comm->comm;
418 copy_comm->rdv = strdup(comm->rdv);
419 copy_comm->data_size = -1;
420 copy_comm->data = NULL;
421 if(comm->type == SIMIX_COMM_SEND){
422 copy_comm->src_proc = comm->src_proc;
423 copy_comm->src_host = comm->src_host;
424 if(comm->data != NULL){
425 copy_comm->data_size = comm->data_size;
426 copy_comm->data = xbt_malloc0(comm->data_size);
427 memcpy(copy_comm->data, comm->data, comm->data_size);
430 copy_comm->dst_proc = comm->dst_proc;
431 copy_comm->dst_host = comm->dst_host;
433 xbt_dynar_push(initial_incomplete_process_comms, ©_comm);
439 * \brief Re-executes from the state at position start all the transitions indicated by
440 * a given model-checker stack.
441 * \param stack The stack with the transitions to execute.
442 * \param start Start index to begin the re-execution.
444 void MC_replay(xbt_fifo_t stack)
446 int raw_mem = (mmalloc_get_current_heap() == mc_heap);
448 int value, count = 1, j;
450 smx_simcall_t req = NULL, saved_req = NULL;
451 xbt_fifo_item_t item, start_item;
454 XBT_DEBUG("**** Begin Replay ****");
456 /* Intermediate backtracking */
457 if(_sg_mc_checkpoint > 0) {
458 start_item = xbt_fifo_get_first_item(stack);
459 state = (mc_state_t)xbt_fifo_get_item_content(start_item);
460 if(state->system_state){
461 MC_restore_snapshot(state->system_state);
462 if(_sg_mc_comms_determinism || _sg_mc_send_determinism)
463 MC_restore_communications_pattern(state);
470 /* Restore the initial state */
471 MC_restore_snapshot(initial_global_state->snapshot);
472 /* At the moment of taking the snapshot the raw heap was set, so restoring
473 * it will set it back again, we have to unset it to continue */
476 start_item = xbt_fifo_get_last_item(stack);
480 if (_sg_mc_comms_determinism || _sg_mc_send_determinism) {
481 for (j=0; j<simix_process_maxpid; j++) {
482 xbt_dynar_reset((xbt_dynar_t)xbt_dynar_get_as(incomplete_communications_pattern, j, xbt_dynar_t));
483 ((mc_list_comm_pattern_t)xbt_dynar_get_as(initial_communications_pattern, j, mc_list_comm_pattern_t))->index_comm = 0;
489 /* Traverse the stack from the state at position start and re-execute the transitions */
490 for (item = start_item;
491 item != xbt_fifo_get_first_item(stack);
492 item = xbt_fifo_get_prev_item(item)) {
494 state = (mc_state_t) xbt_fifo_get_item_content(item);
495 saved_req = MC_state_get_executed_request(state, &value);
498 /* because we got a copy of the executed request, we have to fetch the
499 real one, pointed by the request field of the issuer process */
500 req = &saved_req->issuer->simcall;
502 /* Debug information */
503 if (XBT_LOG_ISENABLED(mc_global, xbt_log_priority_debug)) {
504 req_str = MC_request_to_string(req, value);
505 XBT_DEBUG("Replay: %s (%p)", req_str, state);
509 /* TODO : handle test and testany simcalls */
510 e_mc_call_type_t call = MC_CALL_TYPE_NONE;
511 if (_sg_mc_comms_determinism || _sg_mc_send_determinism)
512 call = mc_get_call_type(req);
514 SIMIX_simcall_handle(req, value);
517 if (_sg_mc_comms_determinism || _sg_mc_send_determinism)
518 handle_comm_pattern(call, req, value, NULL, 1);
521 MC_wait_for_requests();
526 /* Update statistics */
527 mc_stats->visited_states++;
528 mc_stats->executed_transitions++;
532 XBT_DEBUG("**** End Replay ****");
542 void MC_replay_liveness(xbt_fifo_t stack)
545 initial_global_state->raw_mem_set = (mmalloc_get_current_heap() == mc_heap);
547 xbt_fifo_item_t item;
548 mc_pair_t pair = NULL;
549 mc_state_t state = NULL;
550 smx_simcall_t req = NULL, saved_req = NULL;
551 int value, depth = 1;
554 XBT_DEBUG("**** Begin Replay ****");
556 /* Intermediate backtracking */
557 if(_sg_mc_checkpoint > 0) {
558 item = xbt_fifo_get_first_item(stack);
559 pair = (mc_pair_t) xbt_fifo_get_item_content(item);
560 if(pair->graph_state->system_state){
561 MC_restore_snapshot(pair->graph_state->system_state);
567 /* Restore the initial state */
568 MC_restore_snapshot(initial_global_state->snapshot);
570 /* At the moment of taking the snapshot the raw heap was set, so restoring
571 * it will set it back again, we have to unset it to continue */
572 if (!initial_global_state->raw_mem_set)
575 /* Traverse the stack from the initial state and re-execute the transitions */
576 for (item = xbt_fifo_get_last_item(stack);
577 item != xbt_fifo_get_first_item(stack);
578 item = xbt_fifo_get_prev_item(item)) {
580 pair = (mc_pair_t) xbt_fifo_get_item_content(item);
582 state = (mc_state_t) pair->graph_state;
584 if (pair->exploration_started) {
586 saved_req = MC_state_get_executed_request(state, &value);
588 if (saved_req != NULL) {
589 /* because we got a copy of the executed request, we have to fetch the
590 real one, pointed by the request field of the issuer process */
591 req = &saved_req->issuer->simcall;
593 /* Debug information */
594 if (XBT_LOG_ISENABLED(mc_global, xbt_log_priority_debug)) {
595 req_str = MC_request_to_string(req, value);
596 XBT_DEBUG("Replay (depth = %d) : %s (%p)", depth, req_str, state);
602 SIMIX_simcall_handle(req, value);
603 MC_wait_for_requests();
606 /* Update statistics */
607 mc_stats->visited_pairs++;
608 mc_stats->executed_transitions++;
614 XBT_DEBUG("**** End Replay ****");
616 if (initial_global_state->raw_mem_set)
624 * \brief Dumps the contents of a model-checker's stack and shows the actual
626 * \param stack The stack to dump
628 void MC_dump_stack_safety(xbt_fifo_t stack)
631 int raw_mem_set = (mmalloc_get_current_heap() == mc_heap);
633 MC_show_stack_safety(stack);
638 while ((state = (mc_state_t) xbt_fifo_pop(stack)) != NULL)
639 MC_state_delete(state, !state->in_visited_states ? 1 : 0);
650 void MC_show_stack_safety(xbt_fifo_t stack)
653 int raw_mem_set = (mmalloc_get_current_heap() == mc_heap);
659 xbt_fifo_item_t item;
661 char *req_str = NULL;
663 for (item = xbt_fifo_get_last_item(stack);
664 (item ? (state = (mc_state_t) (xbt_fifo_get_item_content(item)))
665 : (NULL)); item = xbt_fifo_get_prev_item(item)) {
666 req = MC_state_get_executed_request(state, &value);
668 req_str = MC_request_to_string(req, value);
669 XBT_INFO("%s", req_str);
678 void MC_show_deadlock(smx_simcall_t req)
680 /*char *req_str = NULL; */
681 XBT_INFO("**************************");
682 XBT_INFO("*** DEAD-LOCK DETECTED ***");
683 XBT_INFO("**************************");
684 XBT_INFO("Locked request:");
685 /*req_str = MC_request_to_string(req);
686 XBT_INFO("%s", req_str);
687 xbt_free(req_str); */
688 XBT_INFO("Counter-example execution trace:");
689 MC_dump_stack_safety(mc_stack);
690 MC_print_statistics(mc_stats);
694 void MC_show_stack_liveness(xbt_fifo_t stack)
698 xbt_fifo_item_t item;
700 char *req_str = NULL;
702 for (item = xbt_fifo_get_last_item(stack);
703 (item ? (pair = (mc_pair_t) (xbt_fifo_get_item_content(item))) : (NULL));
704 item = xbt_fifo_get_prev_item(item)) {
705 req = MC_state_get_executed_request(pair->graph_state, &value);
706 if (req && req->call != SIMCALL_NONE) {
707 req_str = MC_request_to_string(req, value);
708 XBT_INFO("%s", req_str);
715 void MC_dump_stack_liveness(xbt_fifo_t stack)
718 int raw_mem_set = (mmalloc_get_current_heap() == mc_heap);
723 while ((pair = (mc_pair_t) xbt_fifo_pop(stack)) != NULL)
724 MC_pair_delete(pair);
733 void MC_print_statistics(mc_stats_t stats)
735 xbt_mheap_t previous_heap = mmalloc_get_current_heap();
737 if (stats->expanded_pairs == 0) {
738 XBT_INFO("Expanded states = %lu", stats->expanded_states);
739 XBT_INFO("Visited states = %lu", stats->visited_states);
741 XBT_INFO("Expanded pairs = %lu", stats->expanded_pairs);
742 XBT_INFO("Visited pairs = %lu", stats->visited_pairs);
744 XBT_INFO("Executed transitions = %lu", stats->executed_transitions);
746 if ((_sg_mc_dot_output_file != NULL) && (_sg_mc_dot_output_file[0] != '\0')) {
747 fprintf(dot_output, "}\n");
750 if (initial_global_state != NULL) {
751 if (_sg_mc_comms_determinism)
752 XBT_INFO("Communication-deterministic : %s", !initial_global_state->comm_deterministic ? "No" : "Yes");
753 if (_sg_mc_send_determinism)
754 XBT_INFO("Send-deterministic : %s", !initial_global_state->send_deterministic ? "No" : "Yes");
756 mmalloc_set_current_heap(previous_heap);
759 void MC_assert(int prop)
761 if (MC_is_active() && !prop) {
762 XBT_INFO("**************************");
763 XBT_INFO("*** PROPERTY NOT VALID ***");
764 XBT_INFO("**************************");
765 XBT_INFO("Counter-example execution trace:");
766 MC_record_dump_path(mc_stack);
767 MC_dump_stack_safety(mc_stack);
768 MC_print_statistics(mc_stats);
775 user_max_depth_reached = 1;
778 void MC_automaton_load(const char *file)
781 int raw_mem_set = (mmalloc_get_current_heap() == mc_heap);
785 if (_mc_property_automaton == NULL)
786 _mc_property_automaton = xbt_automaton_new();
788 xbt_automaton_load(_mc_property_automaton, file);
797 void MC_automaton_new_propositional_symbol(const char *id, void *fct)
800 int raw_mem_set = (mmalloc_get_current_heap() == mc_heap);
804 if (_mc_property_automaton == NULL)
805 _mc_property_automaton = xbt_automaton_new();
807 xbt_automaton_propositional_symbol_new(_mc_property_automaton, id, fct);
816 void MC_dump_stacks(FILE* file)
818 int raw_mem_set = (mmalloc_get_current_heap() == mc_heap);
822 stack_region_t current_stack;
824 xbt_dynar_foreach(stacks_areas, cursor, current_stack) {
825 unw_context_t * context = (unw_context_t *)current_stack->context;
826 fprintf(file, "Stack %i:\n", nstack);
831 unw_init_local (&c, context);
834 const char * name = !unw_get_proc_name(&c, buffer, 100, &off) ? buffer : "?";
835 fprintf(file, " %i: %s\n", nframe, name);
837 } while(unw_step(&c));
847 double MC_process_clock_get(smx_process_t process)
851 return mc_time[process->pid];
859 void MC_process_clock_add(smx_process_t process, double amount)
861 mc_time[process->pid] += amount;