X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/f18ab288219690177e48123c64ba809bd421f02a..9e9c6282dfe55ae4c5b35553d5d68f9dc129181c:/src/mc/mc_global.c diff --git a/src/mc/mc_global.c b/src/mc/mc_global.c index acbaabfe63..0dd57b1c95 100644 --- a/src/mc/mc_global.c +++ b/src/mc/mc_global.c @@ -1,10 +1,15 @@ +#include +#include +#include + #include "../surf/surf_private.h" #include "../simix/private.h" #include "xbt/fifo.h" #include "private.h" + 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; @@ -17,99 +22,116 @@ char mc_replay_mode = FALSE; /** * \brief Initialize the model-checker data structures */ -void MC_init(int method) -{ +void MC_init(void) +{ + smx_process_t process; + /* Check if MC is already initialized */ - if(initial_snapshot) + if (initial_snapshot) return; - + /* 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(); /* 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; + + /* Add the existing processes to mc's setset so they have an ID designated */ + xbt_swag_foreach(process, simix_global->process_list){ + xbt_setset_elm_add(mc_setset, process); } + /* Initialize the control variable */ + mc_exp_ctl = xbt_new0(e_mc_exp_ctl_t, 1); + *mc_exp_ctl = MC_EXPLORE; + + MC_UNSET_RAW_MEM; + + + /* Save the initial state */ - MC_SET_RAW_MEM; - initial_snapshot = xbt_new(s_mc_snapshot_t,1); +/* MC_SET_RAW_MEM; + initial_snapshot = xbt_new0(s_mc_snapshot_t, 1); MC_take_snapshot(initial_snapshot); - MC_UNSET_RAW_MEM; + MC_UNSET_RAW_MEM;*/ } -void MC_modelcheck(int method) +void MC_modelcheck(void) { + int status; + pid_t pid; - MC_init(method); - - switch(method){ - case 0: - MC_dfs(); + /* Compute initial state */ + MC_init(); + + /* Fork an mc's slave exploration process and wait for it. */ + /* The forked process will explore a trace until: + - a back-tracking point is found (it sets mc_expl_ctl to MC_explore) + - there are no more states to explore (it sets mc_expl_ctl to MC_STOP) + - a property is invalid (or dead-lock) + */ + while(*mc_exp_ctl == MC_EXPLORE){ + if((pid = fork())){ + waitpid(pid, &status, 0); + mmalloc_detach(raw_heap); + raw_heap = mmalloc_attach(raw_heap_fd, (char*)(std_heap) + STD_HEAP_SIZE + getpagesize()); + + if (WIFSIGNALED(status)) { + INFO1("killed by signal %d\n", WTERMSIG(status)); break; - case 1: - MC_dpor(); + }else if (WIFSTOPPED(status)) { + INFO1("stopped by signal %d\n", WSTOPSIG(status)); break; - default: + }else if (WIFCONTINUED(status)) { + INFO0("continued\n"); break; - } + } + + if(*mc_exp_ctl == MC_DEADLOCK){ + INFO0("**************************"); + INFO0("*** DEAD-LOCK DETECTED ***"); + INFO0("**************************"); + MC_dump_stack(mc_stack); + MC_print_statistics(mc_stats); + break; + } + + }else{ + /* if mc_stack is empty then create first state, otherwise replay */ + if(xbt_fifo_size(mc_stack) == 0) + MC_dpor_init(); + else + MC_replay(mc_stack); - MC_exit(method); + MC_dpor(); + MC_memory_exit(); + break; + } + } + + /* If we are the mc's master process then exit */ + if(pid) + MC_exit(); } -void MC_exit(int method) +void MC_exit(void) { - mc_state_t state; - - switch(method){ - case 0: - //MC_dfs_exit(); - break; - case 1: - //MC_dpor_exit(); - break; - default: - break; - } - - /* Destroy MC data structures (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); - MC_UNSET_RAW_MEM; + mmalloc_detach(raw_heap); + shm_unlink("raw_heap"); } int MC_random(int min, int max) { - MC_random_create(min,max); - SIMIX_process_yield(); - - if(!mc_replay_mode) - return mc_current_state->executed_transition->current_value; - else - return mc_current_state->executed_transition->current_value - 1; + /*FIXME: return mc_current_state->executed_transition->random.value;*/ + return 0; } /** @@ -119,40 +141,46 @@ int MC_random(int min, int max) */ void MC_replay(xbt_fifo_t stack) { + char *req_str; + smx_req_t req = NULL, saved_req = NULL; xbt_fifo_item_t item; - mc_transition_t trans; + mc_state_t state; DEBUG0("**** Begin Replay ****"); /* Restore the initial state */ - MC_restore_snapshot(initial_snapshot); + /*MC_restore_snapshot(initial_snapshot);*/ - mc_replay_mode = TRUE; - - MC_UNSET_RAW_MEM; + MC_wait_for_requests(); /* 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); + + 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->request; + + /* Debug information */ + if(XBT_LOG_ISENABLED(mc_global, xbt_log_priority_debug)){ + req_str = MC_request_to_string(req); + DEBUG1("Replay: %s", req_str); + xbt_free(req_str); + } + } + + SIMIX_request_pre(req); + MC_wait_for_requests(); + /* Update statistics */ mc_stats->visited_states++; mc_stats->executed_transitions++; - - DEBUG1("Executing transition %s", trans->name); - SIMIX_process_schedule(trans->process); - - /* Do all surf's related black magic tricks to keep all working */ - MC_execute_surf_actions(); - - /* Schedule every process that got enabled due to the executed transition */ - MC_schedule_enabled_processes(); } - mc_replay_mode = FALSE; DEBUG0("**** End Replay ****"); } @@ -166,9 +194,9 @@ void MC_dump_stack(xbt_fifo_t stack) mc_state_t state; MC_show_stack(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; } @@ -176,122 +204,44 @@ void MC_dump_stack(xbt_fifo_t stack) void MC_show_stack(xbt_fifo_t stack) { 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_req_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); + if(req){ + req_str = MC_request_to_string(req); + INFO1("%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) -{ - smx_process_t process; - - //SIMIX_process_empty_trash(); - - /* 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); - } -} - -/******************************** States **************************************/ - -/** - * \brief Creates a state data structure used by the exploration algorithm - */ -mc_state_t MC_state_new(void) -{ - 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++; - - return state; -} -/** - * \brief Deletes a state data structure - * \param trans The state to be deleted */ -void MC_state_delete(mc_state_t state) +void MC_wait_for_requests(void) { - xbt_setset_cursor_t cursor; - mc_transition_t trans; - - xbt_setset_foreach(state->created_transitions, cursor, trans){ - MC_transition_delete(trans); - } - - 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); - - xbt_free(state); -} - -/************************** 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) -{ - 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); + char *req_str = NULL; + smx_req_t req = NULL; + + do { + SIMIX_context_runall(simix_global->process_to_run); + while((req = SIMIX_request_pop())){ + if(!SIMIX_request_is_visible(req)) + SIMIX_request_pre(req); + else if(req->call == REQ_COMM_WAITANY) + THROW_UNIMPLEMENTED; + else if(XBT_LOG_ISENABLED(mc_global, xbt_log_priority_debug)){ + req_str = MC_request_to_string(req); + DEBUG1("Got: %s", req_str); + xbt_free(req_str); } } - /*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*/ + } while (xbt_swag_size(simix_global->process_to_run)); } /****************************** Statistics ************************************/ @@ -302,15 +252,15 @@ void MC_print_statistics(mc_stats_t stats) 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); + (double) stats->visited_states / stats->expanded_states); /*INFO1("Exploration coverage = %lf", - (double)stats->expanded_states / stats->state_size);*/ + (double)stats->expanded_states / stats->state_size); */ } /************************* Assertion Checking *********************************/ void MC_assert(int prop) { - if(!prop){ + if (MC_IS_ENABLED && !prop) { INFO0("**************************"); INFO0("*** PROPERTY NOT VALID ***"); INFO0("**************************"); @@ -321,3 +271,16 @@ void MC_assert(int prop) } } +void MC_show_deadlock(smx_req_t req) +{ + char *req_str = NULL; + INFO0("**************************"); + INFO0("*** DEAD-LOCK DETECTED ***"); + INFO0("**************************"); + INFO0("Locked request:"); + req_str = MC_request_to_string(req); + INFO1("%s", req_str); + xbt_free(req_str); + INFO0("Counter-example execution trace:"); + MC_dump_stack(mc_stack); +}