+/* Copyright (c) 2008-2012 Da SimGrid Team. All rights reserved. */
+
+/* This program is free software; you can redistribute it and/or modify it
+ * under the terms of the license (GNU LGPL) which comes with this package. */
+
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <sys/time.h>
+
#include "../surf/surf_private.h"
-#include "../simix/private.h"
+#include "../simix/smx_private.h"
#include "xbt/fifo.h"
-#include "private.h"
+#include "mc_private.h"
+XBT_LOG_NEW_CATEGORY(mc, "All MC categories");
XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_global, mc,
- "Logging specific to MC (global)");
+ "Logging specific to MC (global)");
/* MC global data structures */
-mc_snapshot_t initial_snapshot = NULL;
-xbt_fifo_t mc_stack = NULL;
-xbt_setset_t mc_setset = NULL;
-mc_stats_t mc_stats = NULL;
+
mc_state_t mc_current_state = NULL;
char mc_replay_mode = FALSE;
+double *mc_time = NULL;
+mc_snapshot_t initial_snapshot = NULL;
+
+/* Safety */
+
+xbt_fifo_t mc_stack_safety_stateful = NULL;
+xbt_fifo_t mc_stack_safety_stateless = NULL;
+mc_stats_t mc_stats = NULL;
+
+/* Liveness */
+
+mc_stats_pair_t mc_stats_pair = NULL;
+xbt_fifo_t mc_stack_liveness = NULL;
+mc_snapshot_t initial_snapshot_liveness = NULL;
+
+xbt_automaton_t automaton;
+
+static void MC_init_liveness(xbt_automaton_t a);
+static void MC_assert_pair(int prop);
+
/**
* \brief Initialize the model-checker data structures
*/
-void MC_init(int method)
-{
+void MC_init_safety_stateless(void)
+{
+
/* Check if MC is already initialized */
- if(initial_snapshot)
+ if (initial_snapshot)
return;
-
+
+ mc_time = xbt_new0(double, simix_process_maxpid);
+
/* Initialize the data structures that must be persistent across every
iteration of the model-checker (in RAW memory) */
MC_SET_RAW_MEM;
-
+
/* Initialize statistics */
mc_stats = xbt_new0(s_mc_stats_t, 1);
mc_stats->state_size = 1;
-
+
/* Create exploration stack */
- mc_stack = xbt_fifo_new();
+ mc_stack_safety_stateless = xbt_fifo_new();
+
+ MC_UNSET_RAW_MEM;
+
+ MC_dpor_init();
- /* Create the container for the sets */
- mc_setset = xbt_setset_new(20);
-
- switch(method){
- case 0:
- MC_dfs_init();
- break;
- case 1:
- MC_dpor_init();
- break;
- default:
- break;
- }
-
- /* Save the initial state */
MC_SET_RAW_MEM;
- initial_snapshot = xbt_new(s_mc_snapshot_t,1);
+ /* Save the initial state */
+ initial_snapshot = xbt_new0(s_mc_snapshot_t, 1);
MC_take_snapshot(initial_snapshot);
MC_UNSET_RAW_MEM;
}
-void MC_modelcheck(int method)
-{
+void MC_init_safety_stateful(void){
- MC_init(method);
+
+ /* Check if MC is already initialized */
+ if (initial_snapshot)
+ return;
+
+ mc_time = xbt_new0(double, simix_process_maxpid);
+
+ /* Initialize the data structures that must be persistent across every
+ iteration of the model-checker (in RAW memory) */
+ MC_SET_RAW_MEM;
+
+ /* Initialize statistics */
+ mc_stats = xbt_new0(s_mc_stats_t, 1);
+ mc_stats->state_size = 1;
+
+ /* Create exploration stack */
+ mc_stack_safety_stateful = xbt_fifo_new();
+
+ MC_UNSET_RAW_MEM;
+
+ MC_dpor_stateful_init();
- switch(method){
- case 0:
- MC_dfs();
- break;
- case 1:
- MC_dpor();
- break;
- default:
- break;
- }
- MC_exit(method);
}
-void MC_exit(int method)
-{
- mc_state_t state;
+static void MC_init_liveness(xbt_automaton_t a){
+
+ XBT_DEBUG("Start init mc");
- switch(method){
- case 0:
- //MC_dfs_exit();
- break;
- case 1:
- //MC_dpor_exit();
- break;
- default:
- break;
- }
-
- /* Destroy MC data structures (in RAW memory) */
+ mc_time = xbt_new0(double, simix_process_maxpid);
+
+ /* Initialize the data structures that must be persistent across every
+ iteration of the model-checker (in RAW memory) */
+
MC_SET_RAW_MEM;
- xbt_free(mc_stats);
- while( (state = (mc_state_t)xbt_fifo_pop(mc_stack)) != NULL )
- MC_state_delete(state);
-
- xbt_fifo_free(mc_stack);
- xbt_setset_destroy(mc_setset);
+ /* Initialize statistics */
+ mc_stats_pair = xbt_new0(s_mc_stats_pair_t, 1);
+
+ XBT_DEBUG("Creating stack");
+
+ /* Create exploration stack */
+ mc_stack_liveness = xbt_fifo_new();
+
MC_UNSET_RAW_MEM;
+
+ automaton = a;
+
+ MC_ddfs_init();
+
+
+}
+
+
+void MC_modelcheck(void)
+{
+ MC_init_safety_stateless();
+ MC_dpor();
+ MC_exit();
+}
+
+void MC_modelcheck_stateful(void)
+{
+ MC_init_safety_stateful();
+ MC_dpor_stateful();
+ MC_exit();
+}
+
+
+void MC_modelcheck_liveness(xbt_automaton_t a){
+ MC_init_liveness(a);
+ MC_exit_liveness();
+}
+
+void MC_exit_liveness(void)
+{
+ MC_print_statistics_pairs(mc_stats_pair);
+ //xbt_free(mc_time);
+ //MC_memory_exit();
+ exit(0);
}
+
+void MC_exit(void)
+{
+ MC_print_statistics(mc_stats);
+ xbt_free(mc_time);
+ MC_memory_exit();
+}
+
+
int MC_random(int min, int max)
{
- MC_trans_intercept_random(min, max);
- return mc_current_state->executed_transition->random.value;
+ /*FIXME: return mc_current_state->executed_transition->random.value;*/
+ return 0;
+}
+
+/**
+ * \brief Schedules all the process that are ready to run
+ */
+void MC_wait_for_requests(void)
+{
+ smx_process_t process;
+ smx_simcall_t req;
+ unsigned int iter;
+
+ while (!xbt_dynar_is_empty(simix_global->process_to_run)) {
+ SIMIX_process_runall();
+ xbt_dynar_foreach(simix_global->process_that_ran, iter, process) {
+ req = &process->simcall;
+ if (req->call != SIMCALL_NONE && !MC_request_is_visible(req))
+ SIMIX_simcall_pre(req, 0);
+ }
+ }
+}
+
+int MC_deadlock_check()
+{
+ int deadlock = FALSE;
+ smx_process_t process;
+ if(xbt_swag_size(simix_global->process_list)){
+ deadlock = TRUE;
+ xbt_swag_foreach(process, simix_global->process_list){
+ if(process->simcall.call != SIMCALL_NONE
+ && MC_request_is_enabled(&process->simcall)){
+ deadlock = FALSE;
+ break;
+ }
+ }
+ }
+ return deadlock;
}
/**
*/
void MC_replay(xbt_fifo_t stack)
{
+ int value;
+ char *req_str;
+ smx_simcall_t req = NULL, saved_req = NULL;
xbt_fifo_item_t item;
- mc_transition_t trans;
+ mc_state_t state;
- DEBUG0("**** Begin Replay ****");
+ XBT_DEBUG("**** Begin Replay ****");
/* Restore the initial state */
MC_restore_snapshot(initial_snapshot);
-
- mc_replay_mode = TRUE;
-
+ /* At the moment of taking the snapshot the raw heap was set, so restoring
+ * it will set it back again, we have to unset it to continue */
MC_UNSET_RAW_MEM;
/* Traverse the stack from the initial state and re-execute the transitions */
- for(item = xbt_fifo_get_last_item(stack);
- item != xbt_fifo_get_first_item(stack);
- item = xbt_fifo_get_prev_item(item)){
-
- mc_current_state = (mc_state_t) xbt_fifo_get_item_content(item);
- trans = mc_current_state->executed_transition;
+ for (item = xbt_fifo_get_last_item(stack);
+ item != xbt_fifo_get_first_item(stack);
+ item = xbt_fifo_get_prev_item(item)) {
+ state = (mc_state_t) xbt_fifo_get_item_content(item);
+ saved_req = MC_state_get_executed_request(state, &value);
+
+ if(saved_req){
+ /* because we got a copy of the executed request, we have to fetch the
+ real one, pointed by the request field of the issuer process */
+ req = &saved_req->issuer->simcall;
+
+ /* Debug information */
+ if(XBT_LOG_ISENABLED(mc_global, xbt_log_priority_debug)){
+ req_str = MC_request_to_string(req, value);
+ XBT_DEBUG("Replay: %s (%p)", req_str, state);
+ xbt_free(req_str);
+ }
+ }
+
+ SIMIX_simcall_pre(req, value);
+ MC_wait_for_requests();
+
/* Update statistics */
mc_stats->visited_states++;
mc_stats->executed_transitions++;
+ }
+ XBT_DEBUG("**** End Replay ****");
+}
+
+void MC_replay_liveness(xbt_fifo_t stack, int all_stack)
+{
+ int value;
+ char *req_str;
+ smx_simcall_t req = NULL, saved_req = NULL;
+ xbt_fifo_item_t item;
+ mc_state_t state;
+ mc_pair_stateless_t pair;
+ int depth = 1;
- DEBUG1("Executing transition %s", trans->name);
- SIMIX_process_schedule(trans->process);
+ XBT_DEBUG("**** Begin Replay ****");
- /* Do all surf's related black magic tricks to keep all working */
- MC_execute_surf_actions();
+ /* Restore the initial state */
+ MC_restore_snapshot(initial_snapshot_liveness);
+ /* At the moment of taking the snapshot the raw heap was set, so restoring
+ * it will set it back again, we have to unset it to continue */
+ MC_UNSET_RAW_MEM;
- /* Schedule every process that got enabled due to the executed transition */
- MC_schedule_enabled_processes();
- }
- mc_replay_mode = FALSE;
- DEBUG0("**** End Replay ****");
+ if(all_stack){
+
+ item = xbt_fifo_get_last_item(stack);
+
+ while(depth <= xbt_fifo_size(stack)){
+
+ pair = (mc_pair_stateless_t) xbt_fifo_get_item_content(item);
+ state = (mc_state_t) pair->graph_state;
+
+ if(pair->requests > 0){
+
+ saved_req = MC_state_get_executed_request(state, &value);
+ //XBT_DEBUG("SavedReq->call %u", saved_req->call);
+
+ if(saved_req != NULL){
+ /* because we got a copy of the executed request, we have to fetch the
+ real one, pointed by the request field of the issuer process */
+ req = &saved_req->issuer->simcall;
+ //XBT_DEBUG("Req->call %u", req->call);
+
+ /* Debug information */
+ if(XBT_LOG_ISENABLED(mc_global, xbt_log_priority_debug)){
+ req_str = MC_request_to_string(req, value);
+ XBT_DEBUG("Replay (depth = %d) : %s (%p)", depth, req_str, state);
+ xbt_free(req_str);
+ }
+
+ }
+
+ SIMIX_simcall_pre(req, value);
+ MC_wait_for_requests();
+ }
+
+ depth++;
+
+ /* Update statistics */
+ mc_stats_pair->visited_pairs++;
+
+ item = xbt_fifo_get_prev_item(item);
+ }
+
+ }else{
+
+ /* Traverse the stack from the initial state and re-execute the transitions */
+ for (item = xbt_fifo_get_last_item(stack);
+ item != xbt_fifo_get_first_item(stack);
+ item = xbt_fifo_get_prev_item(item)) {
+
+ pair = (mc_pair_stateless_t) xbt_fifo_get_item_content(item);
+ state = (mc_state_t) pair->graph_state;
+
+ if(pair->requests > 0){
+
+ saved_req = MC_state_get_executed_request(state, &value);
+ //XBT_DEBUG("SavedReq->call %u", saved_req->call);
+
+ if(saved_req != NULL){
+ /* because we got a copy of the executed request, we have to fetch the
+ real one, pointed by the request field of the issuer process */
+ req = &saved_req->issuer->simcall;
+ //XBT_DEBUG("Req->call %u", req->call);
+
+ /* Debug information */
+ if(XBT_LOG_ISENABLED(mc_global, xbt_log_priority_debug)){
+ req_str = MC_request_to_string(req, value);
+ XBT_DEBUG("Replay (depth = %d) : %s (%p)", depth, req_str, state);
+ xbt_free(req_str);
+ }
+
+ }
+
+ SIMIX_simcall_pre(req, value);
+ MC_wait_for_requests();
+ }
+
+ depth++;
+
+ /* Update statistics */
+ mc_stats_pair->visited_pairs++;
+ }
+ }
+
+ XBT_DEBUG("**** End Replay ****");
}
+
/**
* \brief Dumps the contents of a model-checker's stack and shows the actual
* execution trace
* \param stack The stack to dump
*/
-void MC_dump_stack(xbt_fifo_t stack)
+void MC_dump_stack_safety_stateless(xbt_fifo_t stack)
{
mc_state_t state;
- MC_show_stack(stack);
-
+ MC_show_stack_safety_stateless(stack);
+
MC_SET_RAW_MEM;
- while( (state = (mc_state_t)xbt_fifo_pop(stack)) != NULL )
+ while ((state = (mc_state_t) xbt_fifo_pop(stack)) != NULL)
MC_state_delete(state);
MC_UNSET_RAW_MEM;
}
-void MC_show_stack(xbt_fifo_t stack)
+
+void MC_show_stack_safety_stateless(xbt_fifo_t stack)
{
+ int value;
mc_state_t state;
- mc_transition_t trans;
xbt_fifo_item_t item;
-
- for(item=xbt_fifo_get_last_item(stack);
- (item?(state=(mc_state_t)(xbt_fifo_get_item_content(item))):(NULL));
- item=xbt_fifo_get_prev_item(item)){
- trans = state->executed_transition;
- if(trans){
- INFO1("%s", trans->name);
+ smx_simcall_t req;
+ char *req_str = NULL;
+
+ for (item = xbt_fifo_get_last_item(stack);
+ (item ? (state = (mc_state_t) (xbt_fifo_get_item_content(item)))
+ : (NULL)); item = xbt_fifo_get_prev_item(item)) {
+ req = MC_state_get_executed_request(state, &value);
+ if(req){
+ req_str = MC_request_to_string(req, value);
+ XBT_INFO("%s", req_str);
+ xbt_free(req_str);
}
}
}
-/**
- * \brief Schedules all the process that are ready to run
- * As a side effect it performs some clean-up required by SIMIX
- */
-void MC_schedule_enabled_processes(void)
+void MC_show_deadlock(smx_simcall_t req)
{
- smx_process_t process;
+ /*char *req_str = NULL;*/
+ XBT_INFO("**************************");
+ XBT_INFO("*** DEAD-LOCK DETECTED ***");
+ XBT_INFO("**************************");
+ XBT_INFO("Locked request:");
+ /*req_str = MC_request_to_string(req);
+ XBT_INFO("%s", req_str);
+ xbt_free(req_str);*/
+ XBT_INFO("Counter-example execution trace:");
+ MC_dump_stack_safety_stateless(mc_stack_safety_stateless);
+}
+
+void MC_show_deadlock_stateful(smx_simcall_t req)
+{
+ /*char *req_str = NULL;*/
+ XBT_INFO("**************************");
+ XBT_INFO("*** DEAD-LOCK DETECTED ***");
+ XBT_INFO("**************************");
+ XBT_INFO("Locked request:");
+ /*req_str = MC_request_to_string(req);
+ XBT_INFO("%s", req_str);
+ xbt_free(req_str);*/
+ XBT_INFO("Counter-example execution trace:");
+ MC_show_stack_safety_stateful(mc_stack_safety_stateful);
+}
+
+void MC_dump_stack_safety_stateful(xbt_fifo_t stack)
+{
+ //mc_state_ws_t state;
- //SIMIX_process_empty_trash();
+ MC_show_stack_safety_stateful(stack);
- /* Schedule every process that is ready to run due to an finished action */
- while ((process = xbt_swag_extract(simix_global->process_to_run))) {
- DEBUG2("Scheduling %s on %s", process->name, process->smx_host->name);
- SIMIX_process_schedule(process);
- }
+ /*MC_SET_RAW_MEM;
+ while ((state = (mc_state_t) xbt_fifo_pop(stack)) != NULL)
+ MC_state_delete(state);
+ MC_UNSET_RAW_MEM;*/
}
-/******************************** States **************************************/
-/**
- * \brief Creates a state data structure used by the exploration algorithm
- */
-mc_state_t MC_state_new(void)
+void MC_show_stack_safety_stateful(xbt_fifo_t stack)
{
- mc_state_t state = NULL;
-
- state = xbt_new0(s_mc_state_t, 1);
- state->created_transitions = xbt_setset_new_set(mc_setset);
- state->transitions = xbt_setset_new_set(mc_setset);
- state->enabled_transitions = xbt_setset_new_set(mc_setset);
- state->interleave = xbt_setset_new_set(mc_setset);
- state->done = xbt_setset_new_set(mc_setset);
- state->executed_transition = NULL;
-
- mc_stats->expanded_states++;
+ int value;
+ mc_state_ws_t state;
+ xbt_fifo_item_t item;
+ smx_simcall_t req;
+ char *req_str = NULL;
- return state;
+ for (item = xbt_fifo_get_last_item(stack);
+ (item ? (state = (mc_state_ws_t) (xbt_fifo_get_item_content(item)))
+ : (NULL)); item = xbt_fifo_get_prev_item(item)) {
+ req = MC_state_get_executed_request(state->graph_state, &value);
+ if(req){
+ req_str = MC_request_to_string(req, value);
+ XBT_INFO("%s", req_str);
+ xbt_free(req_str);
+ }
+ }
}
-/**
- * \brief Deletes a state data structure
- * \param trans The state to be deleted
- */
-void MC_state_delete(mc_state_t state)
-{
- xbt_setset_cursor_t cursor;
- mc_transition_t trans;
+
+
+void MC_show_stack_liveness(xbt_fifo_t stack){
+ int value;
+ mc_pair_stateless_t pair;
+ xbt_fifo_item_t item;
+ smx_simcall_t req;
+ char *req_str = NULL;
- xbt_setset_foreach(state->created_transitions, cursor, trans){
- MC_transition_delete(trans);
+ for (item = xbt_fifo_get_last_item(stack);
+ (item ? (pair = (mc_pair_stateless_t) (xbt_fifo_get_item_content(item)))
+ : (NULL)); item = xbt_fifo_get_prev_item(item)) {
+ req = MC_state_get_executed_request(pair->graph_state, &value);
+ if(req){
+ if(pair->requests>0){
+ req_str = MC_request_to_string(req, value);
+ XBT_INFO("%s", req_str);
+ xbt_free(req_str);
+ }else{
+ XBT_INFO("End of system requests but evolution in Büchi automaton");
+ }
+ }
}
+}
- xbt_setset_destroy_set(state->created_transitions);
- xbt_setset_destroy_set(state->transitions);
- xbt_setset_destroy_set(state->enabled_transitions);
- xbt_setset_destroy_set(state->interleave);
- xbt_setset_destroy_set(state->done);
+void MC_dump_stack_liveness(xbt_fifo_t stack){
+ mc_pair_stateless_t pair;
- xbt_free(state);
+ MC_SET_RAW_MEM;
+ while ((pair = (mc_pair_stateless_t) xbt_fifo_pop(stack)) != NULL)
+ MC_pair_stateless_delete(pair);
+ MC_UNSET_RAW_MEM;
}
-/************************** SURF Emulation ************************************/
-
-/* Dirty hack, we manipulate surf's clock to simplify the integration of the
- model-checker */
-extern double NOW;
-/**
- * \brief Executes all the actions at every model
- */
-void MC_execute_surf_actions(void)
+void MC_print_statistics(mc_stats_t stats)
{
- unsigned int iter;
- surf_action_t action = NULL;
- surf_model_t model = NULL;
- smx_action_t smx_action = NULL;
-
- /* Execute all the actions in every model */
- xbt_dynar_foreach(model_list, iter, model){
- while ((action = xbt_swag_extract(model->states.running_action_set))){
- /* FIXME: timeouts are not calculated correctly */
- if(NOW >= action->max_duration){
- surf_action_state_set(action, SURF_ACTION_DONE);
- smx_action = action->data;
- DEBUG5("Resource [%s] (%d): Executing RUNNING action \"%s\" (%p) MaxDuration %lf",
- model->name, xbt_swag_size(model->states.running_action_set),
- smx_action->name, smx_action, action->max_duration);
-
- if(smx_action)
- SIMIX_action_signal_all(smx_action);
- }
- }
- /*FIXME: check if this is always empty or not */
- while ((action = xbt_swag_extract(model->states.failed_action_set))) {
- smx_action = action->data;
- DEBUG4("Resource [%s] (%d): Executing FAILED action \"%s\" (%p)",
- model->name, xbt_swag_size(model->states.running_action_set),
- smx_action->name, smx_action);
- if (smx_action)
- SIMIX_action_signal_all(smx_action);
- }
- }
- /* That's it, now go one step deeper into the model-checking process! */
- NOW += 0.5; /* FIXME: Check time increases*/
+ //XBT_INFO("State space size ~= %lu", stats->state_size);
+ XBT_INFO("Expanded states = %lu", stats->expanded_states);
+ XBT_INFO("Visited states = %lu", stats->visited_states);
+ XBT_INFO("Executed transitions = %lu", stats->executed_transitions);
+ XBT_INFO("Expanded / Visited = %lf",
+ (double) stats->visited_states / stats->expanded_states);
+ /*XBT_INFO("Exploration coverage = %lf",
+ (double)stats->expanded_states / stats->state_size); */
}
-/****************************** Statistics ************************************/
-void MC_print_statistics(mc_stats_t stats)
+void MC_print_statistics_pairs(mc_stats_pair_t stats)
{
- INFO1("State space size ~= %lu", stats->state_size);
- INFO1("Expanded states = %lu", stats->expanded_states);
- INFO1("Visited states = %lu", stats->visited_states);
- INFO1("Executed transitions = %lu", stats->executed_transitions);
- INFO1("Expanded / Visited = %lf",
- (double)stats->visited_states / stats->expanded_states);
- /*INFO1("Exploration coverage = %lf",
- (double)stats->expanded_states / stats->state_size);*/
+ XBT_INFO("Expanded pairs = %lu", stats->expanded_pairs);
+ XBT_INFO("Visited pairs = %lu", stats->visited_pairs);
+ //XBT_INFO("Executed transitions = %lu", stats->executed_transitions);
+ XBT_INFO("Expanded / Visited = %lf",
+ (double) stats->visited_pairs / stats->expanded_pairs);
+ /*XBT_INFO("Exploration coverage = %lf",
+ (double)stats->expanded_states / stats->state_size); */
}
-/************************* Assertion Checking *********************************/
void MC_assert(int prop)
{
- if(!prop){
- INFO0("**************************");
- INFO0("*** PROPERTY NOT VALID ***");
- INFO0("**************************");
- INFO0("Counter-example execution trace:");
- MC_dump_stack(mc_stack);
+ if (MC_IS_ENABLED && !prop){
+ XBT_INFO("**************************");
+ XBT_INFO("*** PROPERTY NOT VALID ***");
+ XBT_INFO("**************************");
+ XBT_INFO("Counter-example execution trace:");
+ MC_dump_stack_safety_stateless(mc_stack_safety_stateless);
MC_print_statistics(mc_stats);
xbt_abort();
}
}
+void MC_assert_stateful(int prop)
+{
+ if (MC_IS_ENABLED && !prop) {
+ XBT_INFO("**************************");
+ XBT_INFO("*** PROPERTY NOT VALID ***");
+ XBT_INFO("**************************");
+ XBT_INFO("Counter-example execution trace:");
+ MC_dump_stack_safety_stateful(mc_stack_safety_stateful);
+ MC_print_statistics(mc_stats);
+ xbt_abort();
+ }
+}
+
+
+static void MC_assert_pair(int prop){
+ if (MC_IS_ENABLED && !prop) {
+ XBT_INFO("**************************");
+ XBT_INFO("*** PROPERTY NOT VALID ***");
+ XBT_INFO("**************************");
+ //XBT_INFO("Counter-example execution trace:");
+ MC_show_stack_liveness(mc_stack_liveness);
+ //MC_dump_snapshot_stack(mc_snapshot_stack);
+ MC_print_statistics_pairs(mc_stats_pair);
+ xbt_abort();
+ }
+}
+
+void MC_process_clock_add(smx_process_t process, double amount)
+{
+ mc_time[process->pid] += amount;
+}
+
+double MC_process_clock_get(smx_process_t process)
+{
+ if(mc_time)
+ return mc_time[process->pid];
+ else
+ return 0;
+}
+
+void MC_diff(void){
+
+ mc_snapshot_t sn = xbt_new0(s_mc_snapshot_t, 1);
+ MC_take_snapshot_liveness(sn);
+
+ int i;
+
+ XBT_INFO("Number of regions : %u", sn->num_reg);
+
+ for(i=0; i<sn->num_reg; i++){
+
+ switch(sn->regions[i]->type){
+ case 0: /* heap */
+ XBT_INFO("Size of heap : %zu", sn->regions[i]->size);
+ mmalloc_display_info_heap(sn->regions[i]->data);
+ break;
+ case 1 : /* libsimgrid */
+ XBT_INFO("Size of libsimgrid : %zu", sn->regions[i]->size);
+ break;
+ case 2 : /* data program */
+ XBT_INFO("Size of data program : %zu", sn->regions[i]->size);
+ break;
+ case 3 : /* stack */
+ XBT_INFO("Size of stack : %zu", sn->regions[i]->size);
+ XBT_INFO("Start addr of stack : %p", sn->regions[i]->start_addr);
+ break;
+ }
+
+ }
+
+}
