-/* Copyright (c) 2008 Martin Quinson, Cristian Rosa.
- All rights reserved. */
+/* Copyright (c) 2008-2013. The 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 "private.h"
+#include "mc_private.h"
XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_dpor, mc,
"Logging specific to MC DPOR exploration");
-/**
- * \brief Initialize the DPOR exploration algorithm
- */
-void MC_dpor_init()
-{
- mc_state_t initial_state = NULL;
- smx_process_t process;
-
- /* Create the initial state and push it into the exploration stack */
- MC_SET_RAW_MEM;
- initial_state = MC_state_new();
- xbt_fifo_unshift(mc_stack_safety_stateless, initial_state);
- MC_UNSET_RAW_MEM;
-
- XBT_DEBUG("**************************************************");
- XBT_DEBUG("Initial state");
-
- /* Wait for requests (schedules processes) */
- MC_wait_for_requests();
-
- MC_SET_RAW_MEM;
- /* Get an enabled process and insert it in the interleave set of the initial state */
- xbt_swag_foreach(process, simix_global->process_list){
- if(MC_process_is_enabled(process)){
- MC_state_interleave_process(initial_state, process);
- break;
- }
- }
- MC_UNSET_RAW_MEM;
-
- /* FIXME: Update Statistics
- mc_stats->state_size +=
- xbt_setset_set_size(initial_state->enabled_transitions); */
-}
-
-
-/**
- * \brief Perform the model-checking operation using a depth-first search exploration
- * with Dynamic Partial Order Reductions
- */
-void MC_dpor(void)
-{
- char *req_str;
- int value;
- smx_req_t req = NULL, prev_req = NULL;
- mc_state_t state = NULL, prev_state = NULL, next_state = NULL;
- smx_process_t process = NULL;
- xbt_fifo_item_t item = NULL;
-
- while (xbt_fifo_size(mc_stack_safety_stateless) > 0) {
-
- /* Get current state */
- state = (mc_state_t)
- xbt_fifo_get_item_content(xbt_fifo_get_first_item(mc_stack_safety_stateless));
-
- XBT_DEBUG("**************************************************");
- XBT_DEBUG("Exploration depth=%d (state=%p)(%u interleave)",
- xbt_fifo_size(mc_stack_safety_stateless), state,
- MC_state_interleave_size(state));
-
- /* Update statistics */
- mc_stats->visited_states++;
-
- /* If there are processes to interleave and the maximum depth has not been reached
- then perform one step of the exploration algorithm */
- if (xbt_fifo_size(mc_stack_safety_stateless) < MAX_DEPTH &&
- (req = MC_state_get_request(state, &value))) {
-
- /* Debug information */
- if(XBT_LOG_ISENABLED(mc_dpor, xbt_log_priority_debug)){
- req_str = MC_request_to_string(req, value);
- XBT_DEBUG("Execute: %s", req_str);
- xbt_free(req_str);
- }
-
- MC_state_set_executed_request(state, req, value);
- mc_stats->executed_transitions++;
-
- /* Answer the request */
- SIMIX_request_pre(req, value); /* After this call req is no longer usefull */
-
- /* Wait for requests (schedules processes) */
- MC_wait_for_requests();
-
- /* Create the new expanded state */
- MC_SET_RAW_MEM;
- next_state = MC_state_new();
- xbt_fifo_unshift(mc_stack_safety_stateless, next_state);
-
- /* Get an enabled process and insert it in the interleave set of the next state */
- xbt_swag_foreach(process, simix_global->process_list){
- if(MC_process_is_enabled(process)){
- MC_state_interleave_process(next_state, process);
- break;
- }
- }
- MC_UNSET_RAW_MEM;
-
- /* FIXME: Update Statistics
- mc_stats->state_size +=
- xbt_setset_set_size(next_state->enabled_transitions);*/
-
- /* Let's loop again */
-
- /* The interleave set is empty or the maximum depth is reached, let's back-track */
- } else {
- XBT_DEBUG("There are no more processes to interleave.");
-
- /* Trash the current state, no longer needed */
- MC_SET_RAW_MEM;
- xbt_fifo_shift(mc_stack_safety_stateless);
- MC_state_delete(state);
- MC_UNSET_RAW_MEM;
-
- /* Check for deadlocks */
- if(MC_deadlock_check()){
- MC_show_deadlock(NULL);
- return;
- }
-
- MC_SET_RAW_MEM;
- /* Traverse the stack backwards until a state with a non empty interleave
- set is found, deleting all the states that have it empty in the way.
- For each deleted state, check if the request that has generated it
- (from it's predecesor state), depends on any other previous request
- executed before it. If it does then add it to the interleave set of the
- state that executed that previous request. */
- while ((state = xbt_fifo_shift(mc_stack_safety_stateless)) != NULL) {
- req = MC_state_get_internal_request(state);
- xbt_fifo_foreach(mc_stack_safety_stateless, item, prev_state, mc_state_t) {
- if(MC_request_depend(req, MC_state_get_internal_request(prev_state))){
- if(XBT_LOG_ISENABLED(mc_dpor, xbt_log_priority_debug)){
- XBT_DEBUG("Dependent Transitions:");
- prev_req = MC_state_get_executed_request(prev_state, &value);
- req_str = MC_request_to_string(prev_req, value);
- XBT_DEBUG("%s (state=%p)", req_str, prev_state);
- xbt_free(req_str);
- prev_req = MC_state_get_executed_request(state, &value);
- req_str = MC_request_to_string(prev_req, value);
- XBT_DEBUG("%s (state=%p)", req_str, state);
- xbt_free(req_str);
- }
-
- if(!MC_state_process_is_done(prev_state, req->issuer))
- MC_state_interleave_process(prev_state, req->issuer);
- else
- XBT_DEBUG("Process %p is in done set", req->issuer);
-
- break;
- }
- }
- if (MC_state_interleave_size(state)) {
- /* We found a back-tracking point, let's loop */
- xbt_fifo_unshift(mc_stack_safety_stateless, state);
- XBT_DEBUG("Back-tracking to depth %d", xbt_fifo_size(mc_stack_safety_stateless));
- MC_UNSET_RAW_MEM;
- MC_replay(mc_stack_safety_stateless);
- break;
- } else {
- MC_state_delete(state);
- }
- }
- MC_UNSET_RAW_MEM;
- }
- }
- MC_UNSET_RAW_MEM;
- return;
-}
-
-
-/********************* DPOR stateful *********************/
-
-mc_state_ws_t new_state_ws(mc_snapshot_t s, mc_state_t gs){
- mc_state_ws_t sws = NULL;
- sws = xbt_new0(s_mc_state_ws_t, 1);
- sws->system_state = s;
- sws->graph_state = gs;
- return sws;
-}
-
-void MC_dpor_stateful_init(){
-
- XBT_DEBUG("**************************************************");
- XBT_DEBUG("DPOR (stateful) init");
- XBT_DEBUG("**************************************************");
-
- mc_state_t initial_graph_state;
- smx_process_t process;
- mc_snapshot_t initial_system_snapshot;
- mc_state_ws_t initial_state ;
-
- MC_wait_for_requests();
-
- MC_SET_RAW_MEM;
-
- initial_system_snapshot = xbt_new0(s_mc_snapshot_t, 1);
-
- initial_graph_state = MC_state_new();
- xbt_swag_foreach(process, simix_global->process_list){
- if(MC_process_is_enabled(process)){
- MC_state_interleave_process(initial_graph_state, process);
- break;
- }
- }
-
- MC_take_snapshot(initial_system_snapshot);
-
- initial_state = new_state_ws(initial_system_snapshot, initial_graph_state);
- xbt_fifo_unshift(mc_stack_safety_stateful, initial_state);
-
- MC_UNSET_RAW_MEM;
-
-}
-
-void MC_dpor_stateful(){
-
- smx_process_t process = NULL;
-
- if(xbt_fifo_size(mc_stack_safety_stateful) == 0)
- return;
-
- int value;
- mc_state_t next_graph_state = NULL;
- smx_req_t req = NULL, prev_req = NULL;
- char *req_str;
- xbt_fifo_item_t item = NULL;
-
- mc_snapshot_t next_snapshot;
- mc_state_ws_t current_state;
- mc_state_ws_t prev_state;
- mc_state_ws_t next_state;
-
- while(xbt_fifo_size(mc_stack_safety_stateful) > 0){
-
- current_state = (mc_state_ws_t)xbt_fifo_get_item_content(xbt_fifo_get_first_item(mc_stack_safety_stateful));
-
-
- XBT_DEBUG("**************************************************");
- XBT_DEBUG("Depth : %d, State : %p , %u interleave", xbt_fifo_size(mc_stack_safety_stateful),current_state, MC_state_interleave_size(current_state->graph_state));
-
- mc_stats->visited_states++;
- if(mc_stats->expanded_states>1100)
- exit(0);
- //sleep(1);
-
- if((xbt_fifo_size(mc_stack_safety_stateful) < MAX_DEPTH) && (req = MC_state_get_request(current_state->graph_state, &value))){
-
- /* Debug information */
- if(XBT_LOG_ISENABLED(mc_dpor, xbt_log_priority_debug)){
- req_str = MC_request_to_string(req, value);
- //XBT_INFO("Visited states = %lu",mc_stats->visited_states );
- XBT_DEBUG("Execute: %s",req_str);
- xbt_free(req_str);
- }
-
- MC_state_set_executed_request(current_state->graph_state, req, value);
- mc_stats->executed_transitions++;
-
- /* Answer the request */
- SIMIX_request_pre(req, value);
-
- /* Wait for requests (schedules processes) */
- MC_wait_for_requests();
-
- /* Create the new expanded graph_state */
- MC_SET_RAW_MEM;
-
- next_graph_state = MC_state_new();
-
- /* Get an enabled process and insert it in the interleave set of the next graph_state */
- xbt_swag_foreach(process, simix_global->process_list){
- if(MC_process_is_enabled(process)){
- MC_state_interleave_process(next_graph_state, process);
- break;
- }
- }
-
- next_snapshot = xbt_new0(s_mc_snapshot_t, 1);
- MC_take_snapshot(next_snapshot);
-
- next_state = new_state_ws(next_snapshot, next_graph_state);
- xbt_fifo_unshift(mc_stack_safety_stateful, next_state);
-
- MC_UNSET_RAW_MEM;
-
- }else{
- XBT_DEBUG("There are no more processes to interleave.");
-
- /* Trash the current state, no longer needed */
- MC_SET_RAW_MEM;
- xbt_fifo_shift(mc_stack_safety_stateful);
- MC_UNSET_RAW_MEM;
-
- /* Check for deadlocks */
- if(MC_deadlock_check()){
- MC_show_deadlock_stateful(NULL);
- return;
- }
-
- MC_SET_RAW_MEM;
- while((current_state = xbt_fifo_shift(mc_stack_safety_stateful)) != NULL){
- req = MC_state_get_internal_request(current_state->graph_state);
- xbt_fifo_foreach(mc_stack_safety_stateful, item, prev_state, mc_state_ws_t) {
- if(MC_request_depend(req, MC_state_get_internal_request(prev_state->graph_state))){
- if(XBT_LOG_ISENABLED(mc_dpor, xbt_log_priority_debug)){
- XBT_DEBUG("Dependent Transitions:");
- prev_req = MC_state_get_executed_request(prev_state->graph_state, &value);
- req_str = MC_request_to_string(prev_req, value);
- XBT_DEBUG("%s (state=%p)", req_str, prev_state->graph_state);
- xbt_free(req_str);
- prev_req = MC_state_get_executed_request(current_state->graph_state, &value);
- req_str = MC_request_to_string(prev_req, value);
- XBT_DEBUG("%s (state=%p)", req_str, current_state->graph_state);
- xbt_free(req_str);
- }
-
- if(!MC_state_process_is_done(prev_state->graph_state, req->issuer)){
- MC_state_interleave_process(prev_state->graph_state, req->issuer);
-
- } else {
- XBT_DEBUG("Process %p is in done set", req->issuer);
- }
-
- break;
- }
- }
-
- if(MC_state_interleave_size(current_state->graph_state)){
- MC_restore_snapshot(current_state->system_state);
- xbt_fifo_unshift(mc_stack_safety_stateful, current_state);
- XBT_DEBUG("Back-tracking to depth %d", xbt_fifo_size(mc_stack_safety_stateful));
- MC_UNSET_RAW_MEM;
- break;
- }
- }
-
- MC_UNSET_RAW_MEM;
-
- }
- }
- MC_UNSET_RAW_MEM;
- return;
-}
-
-
-
-/************ DPOR 2 (invisible and independant transitions) ************/
-
-xbt_dynar_t reached_pairs_prop;
-xbt_dynar_t visible_transitions;
-xbt_dynar_t enabled_processes;
-
-mc_prop_ato_t new_proposition(char* id, int value){
- mc_prop_ato_t prop = NULL;
- prop = xbt_new0(s_mc_prop_ato_t, 1);
- prop->id = strdup(id);
- prop->value = value;
- return prop;
-}
-
-mc_pair_prop_t new_pair_prop(mc_snapshot_t sn, mc_state_t sg, xbt_state_t st){
- mc_pair_prop_t pair = NULL;
- pair = xbt_new0(s_mc_pair_prop_t, 1);
- pair->system_state = sn;
- pair->automaton_state = st;
- pair->graph_state = sg;
- pair->propositions = xbt_dynar_new(sizeof(mc_prop_ato_t), NULL);
- pair->fully_expanded = 0;
- pair->interleave = 0;
- mc_stats_pair->expanded_pairs++;
- return pair;
-}
-
-int reached_prop(mc_pair_prop_t pair){
-
- char* hash_reached = malloc(sizeof(char)*160);
- unsigned int c= 0;
-
- MC_SET_RAW_MEM;
- char *hash = malloc(sizeof(char)*160);
- xbt_sha((char *)&pair, hash);
- xbt_dynar_foreach(reached_pairs_prop, c, hash_reached){
- if(strcmp(hash, hash_reached) == 0){
- MC_UNSET_RAW_MEM;
- return 1;
- }
- }
-
- MC_UNSET_RAW_MEM;
- return 0;
-}
-
-void set_pair_prop_reached(mc_pair_prop_t pair){
-
- if(reached_prop(pair) == 0){
- MC_SET_RAW_MEM;
- char *hash = malloc(sizeof(char)*160) ;
- xbt_sha((char *)&pair, hash);
- xbt_dynar_push(reached_pairs_prop, &hash);
- MC_UNSET_RAW_MEM;
- }
-
-}
-
-int invisible(mc_pair_prop_t p, mc_pair_prop_t np){
- mc_prop_ato_t prop1;
- mc_prop_ato_t prop2;
- int i;
- for(i=0;i<xbt_dynar_length(p->propositions); i++){
- prop1 = xbt_dynar_get_as(p->propositions, i, mc_prop_ato_t);
- prop2 = xbt_dynar_get_as(np->propositions, i, mc_prop_ato_t);
- //XBT_DEBUG("test invisible : prop 1 = %s : %d / prop 2 = %s : %d", prop1->id, prop1->value, prop2->id, prop2->value);
- if(prop1->value != prop2->value)
- return 0;
- }
- return 1;
-
-}
-
-void set_fully_expanded(mc_pair_prop_t pair){
- pair->fully_expanded = 1;
-}
-
-void MC_dpor2_init(xbt_automaton_t a)
-{
- mc_pair_prop_t initial_pair = NULL;
- mc_state_t initial_graph_state = NULL;
- mc_snapshot_t initial_system_state = NULL;
- xbt_state_t initial_automaton_state = NULL;
-
-
- MC_SET_RAW_MEM;
- initial_graph_state = MC_state_new();
- MC_UNSET_RAW_MEM;
-
- /* Wait for requests (schedules processes) */
- MC_wait_for_requests();
-
- unsigned int cursor = 0;
- unsigned int cursor2 = 0;
- xbt_state_t automaton_state = NULL;
- int res;
- xbt_transition_t transition_succ;
-
- xbt_dynar_foreach(a->states, cursor, automaton_state){
- if(automaton_state->type == -1){
- xbt_dynar_foreach(automaton_state->out, cursor2, transition_succ){
- res = MC_automaton_evaluate_label(a, transition_succ->label);
- if((res == 1) || (res == 2)){
- initial_automaton_state = transition_succ->dst;
- break;
- }
- }
- }
-
- if(initial_automaton_state != NULL)
- break;
- }
-
- if(initial_automaton_state == NULL){
- cursor = 0;
- xbt_dynar_foreach(a->states, cursor, automaton_state){
- if(automaton_state->type == -1){
- initial_automaton_state = automaton_state;
- break;
- }
- }
- }
-
- reached_pairs_prop = xbt_dynar_new(sizeof(char *), NULL);
- visible_transitions = xbt_dynar_new(sizeof(s_smx_req_t), NULL);
- enabled_processes = xbt_dynar_new(sizeof(smx_process_t), NULL);
-
- MC_SET_RAW_MEM;
- initial_system_state = xbt_new0(s_mc_snapshot_t, 1);
- MC_take_snapshot(initial_system_state);
- initial_pair = new_pair_prop(initial_system_state, initial_graph_state, initial_automaton_state);
- cursor = 0;
- xbt_propositional_symbol_t ps;
- xbt_dynar_foreach(a->propositional_symbols, cursor, ps){
- int (*f)() = ps->function;
- int val = (*f)();
- mc_prop_ato_t pa = new_proposition(ps->pred, val);
- xbt_dynar_push(initial_pair->propositions, &pa);
- }
- xbt_fifo_unshift(mc_stack_liveness_stateful, initial_pair);
- MC_UNSET_RAW_MEM;
-
-
- XBT_DEBUG("**************************************************");
- XBT_DEBUG("Initial pair");
-
- MC_dpor2(a, 0);
-
-}
-
-
-void MC_dpor2(xbt_automaton_t a, int search_cycle)
-{
- char *req_str;
- int value;
- smx_req_t req = NULL, prev_req = NULL;
- mc_state_t next_graph_state = NULL;
- mc_snapshot_t next_system_state = NULL;
- xbt_state_t next_automaton_state = NULL;
- xbt_transition_t transition_succ;
- unsigned int cursor;
- int res;
- mc_pair_prop_t pair = NULL, next_pair = NULL, prev_pair = NULL;
- smx_process_t process = NULL;
- xbt_fifo_item_t item = NULL;
- int d;
-
-
- while (xbt_fifo_size(mc_stack_liveness_stateful) > 0) {
-
- /* Get current pair */
- pair = (mc_pair_prop_t)
- xbt_fifo_get_item_content(xbt_fifo_get_first_item(mc_stack_liveness_stateful));
-
- XBT_DEBUG("**************************************************");
- XBT_DEBUG("Exploration depth=%d (pair=%p) (%d interleave)",
- xbt_fifo_size(mc_stack_liveness_stateful), pair, MC_state_interleave_size(pair->graph_state));
-
- if(MC_state_interleave_size(pair->graph_state) == 0){
-
- xbt_dynar_reset(enabled_processes);
-
- MC_SET_RAW_MEM;
-
- xbt_swag_foreach(process, simix_global->process_list){
- if(MC_process_is_enabled(process)){
- xbt_dynar_push(enabled_processes, &process);
- //XBT_DEBUG("Process : pid=%lu",process->pid);
- }
- }
-
- //XBT_DEBUG("Enabled processes before pop : %lu", xbt_dynar_length(enabled_processes));
-
- //XBT_DEBUG("Processes already interleaved : %d", pair->interleave);
-
- if(xbt_dynar_length(enabled_processes) > 0){
- for(d=0;d<pair->interleave;d++){
- xbt_dynar_shift(enabled_processes, NULL);
- }
- }
-
- //XBT_DEBUG("Enabled processes after pop : %lu", xbt_dynar_length(enabled_processes));
-
- if(pair->fully_expanded == 0){
- if(xbt_dynar_length(enabled_processes) > 0){
- MC_state_interleave_process(pair->graph_state, xbt_dynar_get_as(enabled_processes, 0, smx_process_t));
- //XBT_DEBUG("Interleave process");
- }
- }
-
- MC_UNSET_RAW_MEM;
-
- }
-
-
- /* Update statistics */
- mc_stats_pair->visited_pairs++;
- //sleep(1);
-
- /*cursor = 0;
- mc_prop_ato_t pato;
- xbt_dynar_foreach(pair->propositions, cursor, pato){
- XBT_DEBUG("%s : %d", pato->id, pato->value);
- }*/
-
- /* Test acceptance pair and acceptance cycle*/
-
- if(pair->automaton_state->type == 1){
- if(search_cycle == 0){
- set_pair_prop_reached(pair);
- XBT_DEBUG("Acceptance pair : graph=%p, automaton=%p(%s)", pair->graph_state, pair->automaton_state, pair->automaton_state->id);
- }else{
- if(reached_prop(pair) == 1){
- XBT_INFO("*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*");
- XBT_INFO("| ACCEPTANCE CYCLE |");
- XBT_INFO("*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*");
- XBT_INFO("Counter-example that violates formula :");
- MC_show_stack_liveness_stateful(mc_stack_liveness_stateful);
- MC_dump_stack_liveness_stateful(mc_stack_liveness_stateful);
- MC_print_statistics_pairs(mc_stats_pair);
- exit(0);
- }
- }
- }
-
- /* If there are processes to interleave and the maximum depth has not been reached
- then perform one step of the exploration algorithm */
- if (xbt_fifo_size(mc_stack_liveness_stateful) < MAX_DEPTH &&
- (req = MC_state_get_request(pair->graph_state, &value))) {
-
- /* Debug information */
- if(XBT_LOG_ISENABLED(mc_dpor, xbt_log_priority_debug)){
- req_str = MC_request_to_string(req, value);
- XBT_DEBUG("Execute: %s", req_str);
- xbt_free(req_str);
- }
-
- MC_state_set_executed_request(pair->graph_state, req, value);
- //mc_stats_pairs->executed_transitions++;
-
- /* Answer the request */
- SIMIX_request_pre(req, value); /* After this call req is no longer usefull */
-
- /* Wait for requests (schedules processes) */
- MC_wait_for_requests();
-
- /* Create the new expanded state */
- MC_SET_RAW_MEM;
-
- pair->interleave++;
- //XBT_DEBUG("Process interleaved in pair %p : %u", pair, MC_state_interleave_size(pair->graph_state));
- //xbt_dynar_pop(enabled_processes, NULL);
-
- next_graph_state = MC_state_new();
-
- next_system_state = xbt_new0(s_mc_snapshot_t, 1);
- MC_take_snapshot(next_system_state);
- MC_UNSET_RAW_MEM;
-
- cursor = 0;
- xbt_dynar_foreach(pair->automaton_state->out, cursor, transition_succ){
- res = MC_automaton_evaluate_label(a, transition_succ->label);
- if((res == 1) || (res == 2)){ // enabled transition in automaton
- next_automaton_state = transition_succ->dst;
- break;
- }
- }
+/********** Global variables **********/
- if(next_automaton_state == NULL){
- next_automaton_state = pair->automaton_state;
- }
-
- MC_SET_RAW_MEM;
-
- next_pair = new_pair_prop(next_system_state, next_graph_state, next_automaton_state);
- cursor = 0;
- xbt_propositional_symbol_t ps;
- xbt_dynar_foreach(a->propositional_symbols, cursor, ps){
- int (*f)() = ps->function;
- int val = (*f)();
- mc_prop_ato_t pa = new_proposition(ps->pred, val);
- xbt_dynar_push(next_pair->propositions, &pa);
- //XBT_DEBUG("%s : %d", pa->id, pa->value);
- }
- xbt_fifo_unshift(mc_stack_liveness_stateful, next_pair);
-
- cursor = 0;
- if((invisible(pair, next_pair) == 0) && (pair->fully_expanded == 0)){
- set_fully_expanded(pair);
- if(xbt_dynar_length(enabled_processes) > 1){ // Si 1 seul process activé, déjà exécuté juste avant donc état complètement étudié
- xbt_dynar_foreach(enabled_processes, cursor, process){
- MC_state_interleave_process(pair->graph_state, process);
- }
- }
- XBT_DEBUG("Pair %p fully expanded (%u interleave)", pair, MC_state_interleave_size(pair->graph_state));
- }
-
- MC_UNSET_RAW_MEM;
+xbt_dynar_t visited_states;
+xbt_dict_t first_enabled_state;
+xbt_dynar_t initial_communications_pattern;
+xbt_dynar_t communications_pattern;
+int nb_comm_pattern;
-
- /* Let's loop again */
+/********** Static functions ***********/
- /* The interleave set is empty or the maximum depth is reached, let's back-track */
- } else {
- XBT_DEBUG("There are no more processes to interleave.");
+static void comm_pattern_free(mc_comm_pattern_t p){
+ xbt_free(p->rdv);
+ xbt_free(p->data);
+ xbt_free(p);
+ p = NULL;
+}
- /* Trash the current state, no longer needed */
- MC_SET_RAW_MEM;
- xbt_fifo_shift(mc_stack_liveness_stateful);
- //MC_state_delete(state);
- MC_UNSET_RAW_MEM;
+static void comm_pattern_free_voidp( void *p){
+ comm_pattern_free((mc_comm_pattern_t) * (void **)p);
+}
- /* Check for deadlocks */
- if(MC_deadlock_check()){
- MC_show_deadlock(NULL);
- return;
- }
+static mc_comm_pattern_t get_comm_pattern_from_idx(xbt_dynar_t pattern, unsigned int *idx, e_smx_comm_type_t type, unsigned long proc){
+ mc_comm_pattern_t current_comm;
+ while(*idx < xbt_dynar_length(pattern)){
+ current_comm = (mc_comm_pattern_t)xbt_dynar_get_as(pattern, *idx, mc_comm_pattern_t);
+ if(current_comm->type == type && type == SIMIX_COMM_SEND){
+ if(current_comm->src_proc == proc)
+ return current_comm;
+ }else if(current_comm->type == type && type == SIMIX_COMM_RECEIVE){
+ if(current_comm->dst_proc == proc)
+ return current_comm;
+ }
+ (*idx)++;
+ }
+ return NULL;
+}
- MC_SET_RAW_MEM;
- /* Traverse the stack backwards until a state with a non empty interleave
- set is found, deleting all the states that have it empty in the way.
- For each deleted state, check if the request that has generated it
- (from it's predecesor state), depends on any other previous request
- executed before it. If it does then add it to the interleave set of the
- state that executed that previous request. */
- while ((pair = xbt_fifo_shift(mc_stack_liveness_stateful)) != NULL) {
- req = MC_state_get_internal_request(pair->graph_state);
- xbt_fifo_foreach(mc_stack_liveness_stateful, item, prev_pair, mc_pair_prop_t) {
- if(MC_request_depend(req, MC_state_get_internal_request(prev_pair->graph_state))){
- if(XBT_LOG_ISENABLED(mc_dpor, xbt_log_priority_debug)){
- XBT_DEBUG("Dependent Transitions:");
- prev_req = MC_state_get_executed_request(prev_pair->graph_state, &value);
- req_str = MC_request_to_string(prev_req, value);
- XBT_DEBUG("%s (pair=%p)", req_str, prev_pair);
- xbt_free(req_str);
- prev_req = MC_state_get_executed_request(pair->graph_state, &value);
- req_str = MC_request_to_string(prev_req, value);
- XBT_DEBUG("%s (pair=%p)", req_str, pair);
- xbt_free(req_str);
- }
+static int compare_comm_pattern(mc_comm_pattern_t comm1, mc_comm_pattern_t comm2){
+ if(strcmp(comm1->rdv, comm2->rdv) != 0)
+ return 1;
+ if(comm1->src_proc != comm2->src_proc)
+ return 1;
+ if(comm1->dst_proc != comm2->dst_proc)
+ return 1;
+ if(comm1->data_size != comm2->data_size)
+ return 1;
+ if(memcmp(comm1->data, comm2->data, comm1->data_size) != 0)
+ return 1;
+ return 0;
+}
- if(prev_pair->fully_expanded == 0){
- if(!MC_state_process_is_done(prev_pair->graph_state, req->issuer)){
- MC_state_interleave_process(prev_pair->graph_state, req->issuer);
- XBT_DEBUG("Process %p (%lu) interleaved in pair %p", req->issuer, req->issuer->pid, prev_pair);
- }else{
- XBT_DEBUG("Process %p (%lu) is in done set", req->issuer, req->issuer->pid);
- }
- }
-
- break;
- }
+static void deterministic_pattern(xbt_dynar_t initial_pattern, xbt_dynar_t pattern){
+ unsigned int cursor = 0, send_index = 0, recv_index = 0;
+ mc_comm_pattern_t comm1, comm2;
+ int comm_comparison = 0;
+ int current_process = 0;
+ while(current_process < simix_process_maxpid){
+ while(cursor < xbt_dynar_length(initial_pattern)){
+ comm1 = (mc_comm_pattern_t)xbt_dynar_get_as(initial_pattern, cursor, mc_comm_pattern_t);
+ if(comm1->type == SIMIX_COMM_SEND && comm1->src_proc == current_process){
+ comm2 = get_comm_pattern_from_idx(pattern, &send_index, comm1->type, current_process);
+ comm_comparison = compare_comm_pattern(comm1, comm2);
+ if(comm_comparison == 1){
+ initial_state_safety->send_deterministic = 0;
+ initial_state_safety->comm_deterministic = 0;
+ return;
}
-
-
- if (MC_state_interleave_size(pair->graph_state) > 0) {
- /* We found a back-tracking point, let's loop */
- MC_restore_snapshot(pair->system_state);
- xbt_fifo_unshift(mc_stack_liveness_stateful, pair);
- XBT_DEBUG("Back-tracking to depth %d", xbt_fifo_size(mc_stack_liveness_stateful));
- MC_UNSET_RAW_MEM;
- break;
- } else {
- //MC_state_delete(state);
+ send_index++;
+ }else if(comm1->type == SIMIX_COMM_RECEIVE && comm1->dst_proc == current_process){
+ comm2 = get_comm_pattern_from_idx(pattern, &recv_index, comm1->type, current_process);
+ comm_comparison = compare_comm_pattern(comm1, comm2);
+ if(comm_comparison == 1){
+ initial_state_safety->comm_deterministic = 0;
}
+ recv_index++;
}
- MC_UNSET_RAW_MEM;
+ cursor++;
}
+ cursor = 0;
+ send_index = 0;
+ recv_index = 0;
+ current_process++;
}
- MC_UNSET_RAW_MEM;
- return;
+ XBT_DEBUG("Communication-deterministic : %d, Send-deterministic : %d", initial_state_safety->comm_deterministic, initial_state_safety->send_deterministic);
}
-/************ DPOR 3 (invisible and independant transitions with coloration of pairs) ************/
-
-int expanded;
-xbt_dynar_t reached_pairs_prop_col;
-xbt_dynar_t visited_pairs_prop_col;
+static int complete_comm_pattern(xbt_dynar_t list, mc_comm_pattern_t pattern){
+ mc_comm_pattern_t current_pattern;
+ unsigned int cursor = 0;
+ xbt_dynar_foreach(list, cursor, current_pattern){
+ if(current_pattern->comm == pattern->comm){
+ if(!current_pattern->completed){
+ current_pattern->src_proc = pattern->comm->comm.src_proc->pid;
+ current_pattern->dst_proc = pattern->comm->comm.dst_proc->pid;
+ current_pattern->data_size = pattern->comm->comm.src_buff_size;
+ current_pattern->data = xbt_malloc0(current_pattern->data_size);
+ current_pattern->matched_comm = pattern->num;
+ memcpy(current_pattern->data, current_pattern->comm->comm.src_buff, current_pattern->data_size);
+ current_pattern->completed = 1;
+ return current_pattern->num;
+ }
+ }
+ }
+ return -1;
+}
+void get_comm_pattern(xbt_dynar_t list, smx_simcall_t request, int call){
+ mc_comm_pattern_t pattern = NULL;
+ pattern = xbt_new0(s_mc_comm_pattern_t, 1);
+ pattern->num = ++nb_comm_pattern;
+ pattern->completed = 0;
+ if(call == 1){ // ISEND
+ pattern->comm = simcall_comm_isend__get__result(request);
+ pattern->type = SIMIX_COMM_SEND;
+ if(pattern->comm->comm.dst_proc != NULL){
+
+ pattern->matched_comm = complete_comm_pattern(list, pattern);
+ pattern->dst_proc = pattern->comm->comm.dst_proc->pid;
+ pattern->completed = 1;
+ }
+ pattern->src_proc = pattern->comm->comm.src_proc->pid;
+ pattern->data_size = pattern->comm->comm.src_buff_size;
+ pattern->data=xbt_malloc0(pattern->data_size);
+ memcpy(pattern->data, pattern->comm->comm.src_buff, pattern->data_size);
+ }else{ // IRECV
+ pattern->comm = simcall_comm_irecv__get__result(request);
+ pattern->type = SIMIX_COMM_RECEIVE;
+ if(pattern->comm->comm.src_proc != NULL){
+ pattern->matched_comm = complete_comm_pattern(list, pattern);
+ pattern->src_proc = pattern->comm->comm.src_proc->pid;
+ pattern->completed = 1;
+ pattern->data_size = pattern->comm->comm.src_buff_size;
+ pattern->data=xbt_malloc0(pattern->data_size);
+ memcpy(pattern->data, pattern->comm->comm.src_buff, pattern->data_size);
+ }
+ pattern->dst_proc = pattern->comm->comm.dst_proc->pid;
+ }
+ if(pattern->comm->comm.rdv != NULL)
+ pattern->rdv = strdup(pattern->comm->comm.rdv->name);
+ else
+ pattern->rdv = strdup(pattern->comm->comm.rdv_cpy->name);
+ xbt_dynar_push(list, &pattern);
+}
+static void print_communications_pattern(xbt_dynar_t comms_pattern){
+ unsigned int cursor = 0;
+ mc_comm_pattern_t current_comm;
+ xbt_dynar_foreach(comms_pattern, cursor, current_comm){
+ fprintf(stderr, "%s (%d - comm %p, src : %lu, dst %lu, rdv name %s, data %p, matched with %d)\n", current_comm->type == SIMIX_COMM_SEND ? "iSend" : "iRecv", current_comm->num, current_comm->comm, current_comm->src_proc, current_comm->dst_proc, current_comm->rdv, current_comm->data, current_comm->matched_comm);
+ }
+}
-mc_pair_prop_col_t new_pair_prop_col(mc_snapshot_t sn, mc_state_t sg, xbt_state_t st){
-
- mc_pair_prop_col_t pair = NULL;
- pair = xbt_new0(s_mc_pair_prop_col_t, 1);
- pair->system_state = sn;
- pair->automaton_state = st;
- pair->graph_state = sg;
- pair->propositions = xbt_dynar_new(sizeof(mc_prop_ato_t), NULL);
- pair->fully_expanded = 0;
- pair->interleave = 0;
- pair->color=ORANGE;
- mc_stats_pair->expanded_pairs++;
- //XBT_DEBUG("New pair %p : automaton=%p", pair, st);
- return pair;
+static void visited_state_free(mc_visited_state_t state){
+ if(state){
+ MC_free_snapshot(state->system_state);
+ xbt_free(state);
+ }
}
-void set_expanded(mc_pair_prop_col_t pair){
- pair->expanded = expanded;
+static void visited_state_free_voidp(void *s){
+ visited_state_free((mc_visited_state_t) * (void **) s);
}
-int reached_prop_col(mc_pair_prop_col_t pair){
+static mc_visited_state_t visited_state_new(){
- char* hash_reached = malloc(sizeof(char)*160);
- unsigned int c= 0;
+ mc_visited_state_t new_state = NULL;
+ new_state = xbt_new0(s_mc_visited_state_t, 1);
+ new_state->heap_bytes_used = mmalloc_get_bytes_used(std_heap);
+ new_state->nb_processes = xbt_swag_size(simix_global->process_list);
+ new_state->system_state = MC_take_snapshot(mc_stats->expanded_states);
+ new_state->num = mc_stats->expanded_states;
+ new_state->other_num = -1;
- MC_SET_RAW_MEM;
- char *hash = malloc(sizeof(char)*160);
- xbt_sha((char *)&pair, hash);
- xbt_dynar_foreach(reached_pairs_prop_col, c, hash_reached){
- if(strcmp(hash, hash_reached) == 0){
- MC_UNSET_RAW_MEM;
- return 1;
- }
- }
+ return new_state;
- MC_UNSET_RAW_MEM;
- return 0;
}
-void set_pair_prop_col_reached(mc_pair_prop_col_t pair){
+static int get_search_interval(xbt_dynar_t all_states, mc_visited_state_t state, int *min, int *max){
- if(reached_prop_col(pair) == 0){
- MC_SET_RAW_MEM;
- char *hash = malloc(sizeof(char)*160) ;
- xbt_sha((char *)&pair, hash);
- xbt_dynar_push(reached_pairs_prop_col, &hash);
- MC_UNSET_RAW_MEM;
- }
+ int raw_mem_set = (mmalloc_get_current_heap() == raw_heap);
-}
+ MC_SET_RAW_MEM;
-int invisible_col(mc_pair_prop_col_t p, mc_pair_prop_col_t np){
- mc_prop_ato_t prop1;
- mc_prop_ato_t prop2;
- int i;
- for(i=0;i<xbt_dynar_length(p->propositions); i++){
- prop1 = xbt_dynar_get_as(p->propositions, i, mc_prop_ato_t);
- prop2 = xbt_dynar_get_as(np->propositions, i, mc_prop_ato_t);
- //XBT_DEBUG("test invisible : prop 1 = %s : %d / prop 2 = %s : %d", prop1->id, prop1->value, prop2->id, prop2->value);
- if(prop1->value != prop2->value)
- return 0;
+ int cursor = 0, previous_cursor, next_cursor;
+ mc_visited_state_t state_test;
+ int start = 0;
+ int end = xbt_dynar_length(all_states) - 1;
+
+ while(start <= end){
+ cursor = (start + end) / 2;
+ state_test = (mc_visited_state_t)xbt_dynar_get_as(all_states, cursor, mc_visited_state_t);
+ if(state_test->nb_processes < state->nb_processes){
+ start = cursor + 1;
+ }else if(state_test->nb_processes > state->nb_processes){
+ end = cursor - 1;
+ }else{
+ if(state_test->heap_bytes_used < state->heap_bytes_used){
+ start = cursor +1;
+ }else if(state_test->heap_bytes_used > state->heap_bytes_used){
+ end = cursor - 1;
+ }else{
+ *min = *max = cursor;
+ previous_cursor = cursor - 1;
+ while(previous_cursor >= 0){
+ state_test = (mc_visited_state_t)xbt_dynar_get_as(all_states, previous_cursor, mc_visited_state_t);
+ if(state_test->nb_processes != state->nb_processes || state_test->heap_bytes_used != state->heap_bytes_used)
+ break;
+ *min = previous_cursor;
+ previous_cursor--;
+ }
+ next_cursor = cursor + 1;
+ while(next_cursor < xbt_dynar_length(all_states)){
+ state_test = (mc_visited_state_t)xbt_dynar_get_as(all_states, next_cursor, mc_visited_state_t);
+ if(state_test->nb_processes != state->nb_processes || state_test->heap_bytes_used != state->heap_bytes_used)
+ break;
+ *max = next_cursor;
+ next_cursor++;
+ }
+ if(!raw_mem_set)
+ MC_UNSET_RAW_MEM;
+ return -1;
+ }
+ }
}
- return 1;
-}
+ if(!raw_mem_set)
+ MC_UNSET_RAW_MEM;
-void set_fully_expanded_col(mc_pair_prop_col_t pair){
- pair->fully_expanded = 1;
- pair->color = GREEN;
+ return cursor;
}
-void set_pair_prop_col_visited(mc_pair_prop_col_t pair, int sc){
+static int is_visited_state(){
- MC_SET_RAW_MEM;
- mc_visited_pair_prop_col_t p = NULL;
- p = xbt_new0(s_mc_visited_pair_prop_col_t, 1);
- p->pair = pair;
- p->search_cycle = sc;
- char *hash = malloc(sizeof(char)*160);
- xbt_sha((char *)&p, hash);
- xbt_dynar_push(visited_pairs_prop_col, &hash);
- MC_UNSET_RAW_MEM;
+ if(_sg_mc_visited == 0)
+ return -1;
-}
+ int raw_mem_set = (mmalloc_get_current_heap() == raw_heap);
+
+ MC_SET_RAW_MEM;
-int visited_pair_prop_col(mc_pair_prop_col_t pair, int sc){
+ mc_visited_state_t new_state = visited_state_new();
+
+ if(xbt_dynar_is_empty(visited_states)){
- char* hash_visited = malloc(sizeof(char)*160);
- unsigned int c= 0;
+ xbt_dynar_push(visited_states, &new_state);
- MC_SET_RAW_MEM;
- mc_visited_pair_prop_col_t p = NULL;
- p = xbt_new0(s_mc_visited_pair_prop_col_t, 1);
- p->pair = pair;
- p->search_cycle = sc;
- char *hash = malloc(sizeof(char)*160);
- xbt_sha((char *)&p, hash);
- xbt_dynar_foreach(visited_pairs_prop_col, c, hash_visited){
- if(strcmp(hash, hash_visited) == 0){
+ if(!raw_mem_set)
MC_UNSET_RAW_MEM;
- return 1;
+
+ return -1;
+
+ }else{
+
+ int min = -1, max = -1, index;
+ //int res;
+ mc_visited_state_t state_test;
+ int cursor;
+
+ index = get_search_interval(visited_states, new_state, &min, &max);
+
+ if(min != -1 && max != -1){
+ /*res = xbt_parmap_mc_apply(parmap, snapshot_compare, xbt_dynar_get_ptr(visited_states, min), (max-min)+1, new_state);
+ if(res != -1){
+ state_test = (mc_visited_state_t)xbt_dynar_get_as(visited_states, (min+res)-1, mc_visited_state_t);
+ if(state_test->other_num == -1)
+ new_state->other_num = state_test->num;
+ else
+ new_state->other_num = state_test->other_num;
+ if(dot_output == NULL)
+ XBT_DEBUG("State %d already visited ! (equal to state %d)", new_state->num, state_test->num);
+ else
+ XBT_DEBUG("State %d already visited ! (equal to state %d (state %d in dot_output))", new_state->num, state_test->num, new_state->other_num);
+ xbt_dynar_remove_at(visited_states, (min + res) - 1, NULL);
+ xbt_dynar_insert_at(visited_states, (min+res) - 1, &new_state);
+ if(!raw_mem_set)
+ MC_UNSET_RAW_MEM;
+ return new_state->other_num;
+ }*/
+ cursor = min;
+ while(cursor <= max){
+ state_test = (mc_visited_state_t)xbt_dynar_get_as(visited_states, cursor, mc_visited_state_t);
+ if(snapshot_compare(state_test, new_state) == 0){
+ if(state_test->other_num == -1)
+ new_state->other_num = state_test->num;
+ else
+ new_state->other_num = state_test->other_num;
+ if(dot_output == NULL)
+ XBT_DEBUG("State %d already visited ! (equal to state %d)", new_state->num, state_test->num);
+ else
+ XBT_DEBUG("State %d already visited ! (equal to state %d (state %d in dot_output))", new_state->num, state_test->num, new_state->other_num);
+ xbt_dynar_remove_at(visited_states, cursor, NULL);
+ xbt_dynar_insert_at(visited_states, cursor, &new_state);
+ if(!raw_mem_set)
+ MC_UNSET_RAW_MEM;
+ return new_state->other_num;
+ }
+ cursor++;
+ }
+ xbt_dynar_insert_at(visited_states, min, &new_state);
+ }else{
+ state_test = (mc_visited_state_t)xbt_dynar_get_as(visited_states, index, mc_visited_state_t);
+ if(state_test->nb_processes < new_state->nb_processes){
+ xbt_dynar_insert_at(visited_states, index+1, &new_state);
+ }else{
+ if(state_test->heap_bytes_used < new_state->heap_bytes_used)
+ xbt_dynar_insert_at(visited_states, index + 1, &new_state);
+ else
+ xbt_dynar_insert_at(visited_states, index, &new_state);
+ }
+ }
+
+ if(xbt_dynar_length(visited_states) > _sg_mc_visited){
+ int min2 = mc_stats->expanded_states;
+ unsigned int cursor2 = 0;
+ unsigned int index2 = 0;
+ xbt_dynar_foreach(visited_states, cursor2, state_test){
+ if(state_test->num < min2){
+ index2 = cursor2;
+ min2 = state_test->num;
+ }
+ }
+ xbt_dynar_remove_at(visited_states, index2, NULL);
}
- }
-
- MC_UNSET_RAW_MEM;
- return 0;
+ if(!raw_mem_set)
+ MC_UNSET_RAW_MEM;
+
+ return -1;
+
+ }
}
-void MC_dpor3_init(xbt_automaton_t a)
+/**
+ * \brief Initialize the DPOR exploration algorithm
+ */
+void MC_dpor_init()
{
- mc_pair_prop_col_t initial_pair = NULL;
- mc_state_t initial_graph_state = NULL;
- mc_snapshot_t initial_system_state = NULL;
- xbt_state_t initial_automaton_state = NULL;
-
+
+ int raw_mem_set = (mmalloc_get_current_heap() == raw_heap);
+ mc_state_t initial_state = NULL;
+ smx_process_t process;
+
+ /* Create the initial state and push it into the exploration stack */
MC_SET_RAW_MEM;
- initial_graph_state = MC_state_new();
+
+ if(_sg_mc_visited > 0)
+ visited_states = xbt_dynar_new(sizeof(mc_visited_state_t), visited_state_free_voidp);
+
+ first_enabled_state = xbt_dict_new_homogeneous(&xbt_free_f);
+
+ initial_communications_pattern = xbt_dynar_new(sizeof(mc_comm_pattern_t), comm_pattern_free_voidp);
+ communications_pattern = xbt_dynar_new(sizeof(mc_comm_pattern_t), comm_pattern_free_voidp);
+ nb_comm_pattern = 0;
+
+ initial_state = MC_state_new();
+
MC_UNSET_RAW_MEM;
+ XBT_DEBUG("**************************************************");
+ XBT_DEBUG("Initial state");
+
/* Wait for requests (schedules processes) */
MC_wait_for_requests();
- unsigned int cursor = 0;
- unsigned int cursor2 = 0;
- xbt_state_t automaton_state = NULL;
- int res;
- xbt_transition_t transition_succ;
-
- xbt_dynar_foreach(a->states, cursor, automaton_state){
- if(automaton_state->type == -1){
- xbt_dynar_foreach(automaton_state->out, cursor2, transition_succ){
- res = MC_automaton_evaluate_label(a, transition_succ->label);
- if((res == 1) || (res == 2)){
- initial_automaton_state = transition_succ->dst;
- break;
- }
- }
- }
+ MC_ignore_heap(simix_global->process_to_run->data, 0);
+ MC_ignore_heap(simix_global->process_that_ran->data, 0);
- if(initial_automaton_state != NULL)
- break;
+ MC_SET_RAW_MEM;
+
+ /* Get an enabled process and insert it in the interleave set of the initial state */
+ xbt_swag_foreach(process, simix_global->process_list){
+ if(MC_process_is_enabled(process)){
+ MC_state_interleave_process(initial_state, process);
+ if(mc_reduce_kind != e_mc_reduce_none)
+ break;
+ }
}
- if(initial_automaton_state == NULL){
- cursor = 0;
- xbt_dynar_foreach(a->states, cursor, automaton_state){
- if(automaton_state->type == -1){
- initial_automaton_state = automaton_state;
- break;
- }
+ xbt_fifo_unshift(mc_stack_safety, initial_state);
+
+ /* To ensure the soundness of DPOR, we have to keep a list of
+ processes which are still enabled at each step of the exploration.
+ If max depth is reached, we interleave them in the state in which they have
+ been enabled for the first time. */
+ xbt_swag_foreach(process, simix_global->process_list){
+ if(MC_process_is_enabled(process)){
+ char *key = bprintf("%lu", process->pid);
+ char *data = bprintf("%d", xbt_fifo_size(mc_stack_safety));
+ xbt_dict_set(first_enabled_state, key, data, NULL);
+ xbt_free(key);
}
}
- reached_pairs_prop_col = xbt_dynar_new(sizeof(char *), NULL);
- visited_pairs_prop_col = xbt_dynar_new(sizeof(char *), NULL);
- visible_transitions = xbt_dynar_new(sizeof(s_smx_req_t), NULL);
- enabled_processes = xbt_dynar_new(sizeof(smx_process_t), NULL);
- expanded = 0;
-
- MC_SET_RAW_MEM;
- initial_system_state = xbt_new0(s_mc_snapshot_t, 1);
- MC_take_snapshot(initial_system_state);
- initial_pair = new_pair_prop_col(initial_system_state, initial_graph_state, initial_automaton_state);
- cursor = 0;
- xbt_propositional_symbol_t ps;
- xbt_dynar_foreach(a->propositional_symbols, cursor, ps){
- int (*f)() = ps->function;
- int val = (*f)();
- mc_prop_ato_t pa = new_proposition(ps->pred, val);
- xbt_dynar_push(initial_pair->propositions, &pa);
- }
- xbt_fifo_unshift(mc_stack_liveness_stateful, initial_pair);
MC_UNSET_RAW_MEM;
-
- XBT_DEBUG("**************************************************");
- XBT_DEBUG("Initial pair");
-
- MC_dpor3(a, 0);
-
+ if(raw_mem_set)
+ MC_SET_RAW_MEM;
+ else
+ MC_UNSET_RAW_MEM;
+
}
-void MC_dpor3(xbt_automaton_t a, int search_cycle)
+/**
+ * \brief Perform the model-checking operation using a depth-first search exploration
+ * with Dynamic Partial Order Reductions
+ */
+void MC_dpor(void)
{
- char *req_str;
+
+ char *req_str = NULL;
int value;
- smx_req_t req = NULL, prev_req = NULL;
- mc_state_t next_graph_state = NULL;
- mc_snapshot_t next_system_state = NULL;
- xbt_state_t next_automaton_state = NULL;
- xbt_transition_t transition_succ;
- unsigned int cursor;
- int res;
- mc_pair_prop_col_t pair = NULL, next_pair = NULL, prev_pair = NULL;
+ smx_simcall_t req = NULL, prev_req = NULL;
+ mc_state_t state = NULL, prev_state = NULL, next_state = NULL, restore_state=NULL;
smx_process_t process = NULL;
xbt_fifo_item_t item = NULL;
- int d;
+ mc_state_t state_test = NULL;
+ int pos;
+ int visited_state = -1;
+ int enabled = 0;
+ int comm_pattern = 0;
+ int interleave_size = 0;
+ while (xbt_fifo_size(mc_stack_safety) > 0) {
- while (xbt_fifo_size(mc_stack_liveness_stateful) > 0) {
-
- /* Get current pair */
- pair = (mc_pair_prop_col_t)
- xbt_fifo_get_item_content(xbt_fifo_get_first_item(mc_stack_liveness_stateful));
+ /* Get current state */
+ state = (mc_state_t)
+ xbt_fifo_get_item_content(xbt_fifo_get_first_item(mc_stack_safety));
XBT_DEBUG("**************************************************");
- XBT_DEBUG("Exploration depth=%d (pair=%p) (%d interleave)",
- xbt_fifo_size(mc_stack_liveness_stateful), pair, MC_state_interleave_size(pair->graph_state));
-
- if(MC_state_interleave_size(pair->graph_state) == 0){
-
- xbt_dynar_reset(enabled_processes);
-
- MC_SET_RAW_MEM;
-
- xbt_swag_foreach(process, simix_global->process_list){
- if(MC_process_is_enabled(process)){
- xbt_dynar_push(enabled_processes, &process);
- //XBT_DEBUG("Process : pid=%lu",process->pid);
- }
- }
-
- //XBT_DEBUG("Enabled processes before pop : %lu", xbt_dynar_length(enabled_processes));
-
- //XBT_DEBUG("Processes already interleaved : %d", pair->interleave);
-
- if(xbt_dynar_length(enabled_processes) > 0){
- for(d=0;d<pair->interleave;d++){
- xbt_dynar_shift(enabled_processes, NULL);
- }
- }
-
- //XBT_DEBUG("Enabled processes after pop : %lu", xbt_dynar_length(enabled_processes));
-
- if(pair->fully_expanded == 0){
- if(xbt_dynar_length(enabled_processes) > 0){
- MC_state_interleave_process(pair->graph_state, xbt_dynar_get_as(enabled_processes, 0, smx_process_t));
- //XBT_DEBUG("Interleave process");
- }
- }
-
- MC_UNSET_RAW_MEM;
-
- }
-
+ XBT_DEBUG("Exploration depth=%d (state=%p, num %d)(%u interleave, user_max_depth %d, first_enabled_state size : %d)",
+ xbt_fifo_size(mc_stack_safety), state, state->num,
+ MC_state_interleave_size(state), user_max_depth_reached, xbt_dict_size(first_enabled_state));
+
+ interleave_size = MC_state_interleave_size(state);
/* Update statistics */
- mc_stats_pair->visited_pairs++;
- //sleep(1);
-
- /* Test acceptance pair and acceptance cycle*/
-
- if(pair->automaton_state->type == 1){
- if(search_cycle == 0){
- set_pair_prop_col_reached(pair);
- XBT_DEBUG("Acceptance pair : graph=%p, automaton=%p(%s)", pair->graph_state, pair->automaton_state, pair->automaton_state->id);
- }else{
- if(reached_prop_col(pair) == 1){
- XBT_INFO("*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*");
- XBT_INFO("| ACCEPTANCE CYCLE |");
- XBT_INFO("*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*");
- XBT_INFO("Counter-example that violates formula :");
- MC_show_stack_liveness_stateful(mc_stack_liveness_stateful);
- MC_dump_stack_liveness_stateful(mc_stack_liveness_stateful);
- MC_print_statistics_pairs(mc_stats_pair);
- exit(0);
- }
- }
- }
+ mc_stats->visited_states++;
/* If there are processes to interleave and the maximum depth has not been reached
then perform one step of the exploration algorithm */
- if (xbt_fifo_size(mc_stack_liveness_stateful) < MAX_DEPTH &&
- (req = MC_state_get_request(pair->graph_state, &value))) {
+ if (xbt_fifo_size(mc_stack_safety) <= _sg_mc_max_depth && !user_max_depth_reached &&
+ (req = MC_state_get_request(state, &value)) && visited_state == -1) {
- set_pair_prop_col_visited(pair, search_cycle);
-
/* Debug information */
if(XBT_LOG_ISENABLED(mc_dpor, xbt_log_priority_debug)){
req_str = MC_request_to_string(req, value);
XBT_DEBUG("Execute: %s", req_str);
xbt_free(req_str);
}
+
+ MC_SET_RAW_MEM;
+ if(dot_output != NULL)
+ req_str = MC_request_get_dot_output(req, value);
+ MC_UNSET_RAW_MEM;
+
+ MC_state_set_executed_request(state, req, value);
+ mc_stats->executed_transitions++;
+
+ MC_SET_RAW_MEM;
+ char *key = bprintf("%lu", req->issuer->pid);
+ xbt_dict_remove(first_enabled_state, key);
+ xbt_free(key);
+ MC_UNSET_RAW_MEM;
- MC_state_set_executed_request(pair->graph_state, req, value);
+ if(req->call == SIMCALL_COMM_ISEND)
+ comm_pattern = 1;
+ else if(req->call == SIMCALL_COMM_IRECV)
+ comm_pattern = 2;
/* Answer the request */
- SIMIX_request_pre(req, value); /* After this call req is no longer usefull */
+ SIMIX_simcall_pre(req, value); /* After this call req is no longer usefull */
+
+ MC_SET_RAW_MEM;
+ if(comm_pattern != 0){
+ if(!initial_state_safety->initial_communications_pattern_done)
+ get_comm_pattern(initial_communications_pattern, req, comm_pattern);
+ else
+ get_comm_pattern(communications_pattern, req, comm_pattern);
+ }
+ MC_UNSET_RAW_MEM;
+
+ comm_pattern = 0;
/* Wait for requests (schedules processes) */
MC_wait_for_requests();
/* Create the new expanded state */
MC_SET_RAW_MEM;
- pair->interleave++;
+ next_state = MC_state_new();
- next_graph_state = MC_state_new();
+ if((visited_state = is_visited_state()) == -1){
+
+ /* Get an enabled process and insert it in the interleave set of the next state */
+ xbt_swag_foreach(process, simix_global->process_list){
+ if(MC_process_is_enabled(process)){
+ MC_state_interleave_process(next_state, process);
+ if(mc_reduce_kind != e_mc_reduce_none)
+ break;
+ }
+ }
- next_system_state = xbt_new0(s_mc_snapshot_t, 1);
- MC_take_snapshot(next_system_state);
- MC_UNSET_RAW_MEM;
+ if(_sg_mc_checkpoint && ((xbt_fifo_size(mc_stack_safety) + 1) % _sg_mc_checkpoint == 0)){
+ next_state->system_state = MC_take_snapshot(next_state->num);
+ }
+
+ if(dot_output != NULL)
+ fprintf(dot_output, "\"%d\" -> \"%d\" [%s];\n", state->num, next_state->num, req_str);
+
+ }else{
+
+ if(dot_output != NULL)
+ fprintf(dot_output, "\"%d\" -> \"%d\" [%s];\n", state->num, visited_state, req_str);
- cursor = 0;
- xbt_dynar_foreach(pair->automaton_state->out, cursor, transition_succ){
- res = MC_automaton_evaluate_label(a, transition_succ->label);
- if((res == 1) || (res == 2)){ // enabled transition in automaton
- next_automaton_state = transition_succ->dst;
- break;
- }
}
- if(next_automaton_state == NULL)
- next_automaton_state = pair->automaton_state;
+ xbt_fifo_unshift(mc_stack_safety, next_state);
- MC_SET_RAW_MEM;
-
- next_pair = new_pair_prop_col(next_system_state, next_graph_state, next_automaton_state);
- cursor = 0;
- xbt_propositional_symbol_t ps;
- xbt_dynar_foreach(a->propositional_symbols, cursor, ps){
- int (*f)() = ps->function;
- int val = (*f)();
- mc_prop_ato_t pa = new_proposition(ps->pred, val);
- xbt_dynar_push(next_pair->propositions, &pa);
- }
- xbt_fifo_unshift(mc_stack_liveness_stateful, next_pair);
-
- cursor = 0;
- if((invisible_col(pair, next_pair) == 0) && (pair->fully_expanded == 0)){
- set_fully_expanded_col(pair);
- if(xbt_dynar_length(enabled_processes) > 1){ // Si 1 seul process activé, déjà exécuté juste avant donc état complètement étudié
- xbt_dynar_foreach(enabled_processes, cursor, process){
- MC_state_interleave_process(pair->graph_state, process);
- }
- }
- XBT_DEBUG("Pair %p fully expanded (%u interleave)", pair, MC_state_interleave_size(pair->graph_state));
+ /* Insert in dict all enabled processes, if not included yet */
+ xbt_swag_foreach(process, simix_global->process_list){
+ if(MC_process_is_enabled(process)){
+ char *key = bprintf("%lu", process->pid);
+ if(xbt_dict_get_or_null(first_enabled_state, key) == NULL){
+ char *data = bprintf("%d", xbt_fifo_size(mc_stack_safety));
+ xbt_dict_set(first_enabled_state, key, data, NULL);
+ }
+ xbt_free(key);
+ }
}
+
+ if(dot_output != NULL)
+ xbt_free(req_str);
MC_UNSET_RAW_MEM;
-
/* Let's loop again */
/* The interleave set is empty or the maximum depth is reached, let's back-track */
} else {
- XBT_DEBUG("There are no more processes to interleave.");
- /* Trash the current state, no longer needed */
+ if((xbt_fifo_size(mc_stack_safety) > _sg_mc_max_depth) || user_max_depth_reached || visited_state != -1){
+
+ if(user_max_depth_reached && visited_state == -1)
+ XBT_DEBUG("User max depth reached !");
+ else if(visited_state == -1)
+ XBT_WARN("/!\\ Max depth reached ! /!\\ ");
+
+ visited_state = -1;
+
+ /* Interleave enabled processes in the state in which they have been enabled for the first time */
+ xbt_swag_foreach(process, simix_global->process_list){
+ if(MC_process_is_enabled(process)){
+ char *key = bprintf("%lu", process->pid);
+ enabled = (int)strtoul(xbt_dict_get_or_null(first_enabled_state, key), 0, 10);
+ xbt_free(key);
+ int cursor = xbt_fifo_size(mc_stack_safety);
+ xbt_fifo_foreach(mc_stack_safety, item, state_test, mc_state_t){
+ if(cursor-- == enabled){
+ if(!MC_state_process_is_done(state_test, process) && state_test->num != state->num){
+ XBT_DEBUG("Interleave process %lu in state %d", process->pid, state_test->num);
+ MC_state_interleave_process(state_test, process);
+ break;
+ }
+ }
+ }
+ }
+ }
+
+ }else{
+
+ XBT_DEBUG("There are no more processes to interleave. (depth %d)", xbt_fifo_size(mc_stack_safety) + 1);
+
+ }
+
MC_SET_RAW_MEM;
- xbt_fifo_shift(mc_stack_liveness_stateful);
- //MC_state_delete(state);
+ if(!initial_state_safety->initial_communications_pattern_done){
+ //print_communications_pattern(initial_communications_pattern);
+ }else{
+ if(interleave_size == 0){ /* if (interleave_size > 0), process interleaved but not enabled => "incorrect" path, determinism not evaluated */
+ //print_communications_pattern(communications_pattern);
+ deterministic_pattern(initial_communications_pattern, communications_pattern);
+ }
+ }
+ initial_state_safety->initial_communications_pattern_done = 1;
MC_UNSET_RAW_MEM;
+ /* Trash the current state, no longer needed */
+ MC_SET_RAW_MEM;
+ xbt_fifo_shift(mc_stack_safety);
+ MC_state_delete(state);
+ XBT_DEBUG("Delete state %d at depth %d", state->num, xbt_fifo_size(mc_stack_safety) + 1);
+ MC_UNSET_RAW_MEM;
+
/* Check for deadlocks */
if(MC_deadlock_check()){
MC_show_deadlock(NULL);
(from it's predecesor state), depends on any other previous request
executed before it. If it does then add it to the interleave set of the
state that executed that previous request. */
- while ((pair = xbt_fifo_shift(mc_stack_liveness_stateful)) != NULL) {
- req = MC_state_get_internal_request(pair->graph_state);
- xbt_fifo_foreach(mc_stack_liveness_stateful, item, prev_pair, mc_pair_prop_col_t) {
- if(MC_request_depend(req, MC_state_get_internal_request(prev_pair->graph_state))){
- if(XBT_LOG_ISENABLED(mc_dpor, xbt_log_priority_debug)){
- XBT_DEBUG("Dependent Transitions:");
- prev_req = MC_state_get_executed_request(prev_pair->graph_state, &value);
- req_str = MC_request_to_string(prev_req, value);
- XBT_DEBUG("%s (pair=%p)", req_str, prev_pair);
- xbt_free(req_str);
- prev_req = MC_state_get_executed_request(pair->graph_state, &value);
- req_str = MC_request_to_string(prev_req, value);
- XBT_DEBUG("%s (pair=%p)", req_str, pair);
- xbt_free(req_str);
- }
-
- if(prev_pair->fully_expanded == 0){
- if(!MC_state_process_is_done(prev_pair->graph_state, req->issuer)){
- MC_state_interleave_process(prev_pair->graph_state, req->issuer);
- XBT_DEBUG("Process %p (%lu) interleaved in pair %p", req->issuer, req->issuer->pid, prev_pair);
- }else{
- XBT_DEBUG("Process %p (%lu) is in done set", req->issuer, req->issuer->pid);
- }
- }
- break;
+ while ((state = xbt_fifo_shift(mc_stack_safety)) != NULL) {
+ if(mc_reduce_kind != e_mc_reduce_none){
+ req = MC_state_get_internal_request(state);
+ xbt_fifo_foreach(mc_stack_safety, item, prev_state, mc_state_t) {
+ if(MC_request_depend(req, MC_state_get_internal_request(prev_state))){
+ if(XBT_LOG_ISENABLED(mc_dpor, xbt_log_priority_debug)){
+ XBT_DEBUG("Dependent Transitions:");
+ prev_req = MC_state_get_executed_request(prev_state, &value);
+ req_str = MC_request_to_string(prev_req, value);
+ XBT_DEBUG("%s (state=%d)", req_str, prev_state->num);
+ xbt_free(req_str);
+ prev_req = MC_state_get_executed_request(state, &value);
+ req_str = MC_request_to_string(prev_req, value);
+ XBT_DEBUG("%s (state=%d)", req_str, state->num);
+ xbt_free(req_str);
+ }
+
+ if(!MC_state_process_is_done(prev_state, req->issuer))
+ MC_state_interleave_process(prev_state, req->issuer);
+ else
+ XBT_DEBUG("Process %p is in done set", req->issuer);
+
+ break;
+
+ }else if(req->issuer == MC_state_get_internal_request(prev_state)->issuer){
+
+ XBT_DEBUG("Simcall %d and %d with same issuer", req->call, MC_state_get_internal_request(prev_state)->call);
+ break;
+
+ }else{
+
+ XBT_DEBUG("Simcall %d, process %lu (state %d) and simcall %d, process %lu (state %d) are independant", req->call, req->issuer->pid, state->num, MC_state_get_internal_request(prev_state)->call, MC_state_get_internal_request(prev_state)->issuer->pid, prev_state->num);
+
+ }
}
}
-
-
- if (MC_state_interleave_size(pair->graph_state) > 0) {
+
+ if (MC_state_interleave_size(state) && xbt_fifo_size(mc_stack_safety) < _sg_mc_max_depth) {
/* We found a back-tracking point, let's loop */
- MC_restore_snapshot(pair->system_state);
- xbt_fifo_unshift(mc_stack_liveness_stateful, pair);
- XBT_DEBUG("Back-tracking to depth %d", xbt_fifo_size(mc_stack_liveness_stateful));
- MC_UNSET_RAW_MEM;
+ XBT_DEBUG("Back-tracking to state %d at depth %d", state->num, xbt_fifo_size(mc_stack_safety) + 1);
+ if(_sg_mc_checkpoint){
+ if(state->system_state != NULL){
+ MC_restore_snapshot(state->system_state);
+ xbt_fifo_unshift(mc_stack_safety, state);
+ MC_UNSET_RAW_MEM;
+ }else{
+ pos = xbt_fifo_size(mc_stack_safety);
+ item = xbt_fifo_get_first_item(mc_stack_safety);
+ while(pos>0){
+ restore_state = (mc_state_t) xbt_fifo_get_item_content(item);
+ if(restore_state->system_state != NULL){
+ break;
+ }else{
+ item = xbt_fifo_get_next_item(item);
+ pos--;
+ }
+ }
+ MC_restore_snapshot(restore_state->system_state);
+ xbt_fifo_unshift(mc_stack_safety, state);
+ MC_UNSET_RAW_MEM;
+ MC_replay(mc_stack_safety, pos);
+ }
+ }else{
+ xbt_fifo_unshift(mc_stack_safety, state);
+ MC_UNSET_RAW_MEM;
+ MC_replay(mc_stack_safety, -1);
+ }
+ XBT_DEBUG("Back-tracking to state %d at depth %d done", state->num, xbt_fifo_size(mc_stack_safety));
break;
} else {
- //MC_state_delete(state);
+ req = MC_state_get_internal_request(state);
+ if(req->call == SIMCALL_COMM_ISEND || req->call == SIMCALL_COMM_IRECV){
+ if(!xbt_dynar_is_empty(communications_pattern))
+ xbt_dynar_remove_at(communications_pattern, xbt_dynar_length(communications_pattern) - 1, NULL);
+ }
+ XBT_DEBUG("Delete state %d at depth %d", state->num, xbt_fifo_size(mc_stack_safety) + 1);
+ MC_state_delete(state);
}
}
MC_UNSET_RAW_MEM;
}
}
- MC_UNSET_RAW_MEM;
+ MC_print_statistics(mc_stats);
+ MC_UNSET_RAW_MEM;
+
return;
}
+
+
+
+
