src/mc/mc_state.c

   1 /* Copyright (c) 2008-2014. The SimGrid Team.
   2  * All rights reserved.                                                     */
   3
   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. */
   6
   7 #include <assert.h>
   8
   9 #include "../simix/smx_private.h"
  10 #include "xbt/fifo.h"
  11 #include "mc_state.h"
  12 #include "mc_request.h"
  13 #include "mc_private.h"
  14 #include "mc_comm_pattern.h"
  15 #include "mc_smx.h"
  16
  17 static void copy_incomplete_communications_pattern(mc_state_t state) {
  18   int i;
  19   xbt_dynar_t incomplete_process_comms;
  20   mc_comm_pattern_t comm;
  21   unsigned int cursor;
  22   state->incomplete_comm_pattern = xbt_dynar_new(sizeof(xbt_dynar_t), xbt_dynar_free_voidp);
  23   for (i=0; i<simix_process_maxpid; i++) {
  24     incomplete_process_comms = xbt_dynar_get_as(incomplete_communications_pattern, i, xbt_dynar_t);
  25     xbt_dynar_t incomplete_process_comms_copy = xbt_dynar_new(sizeof(mc_comm_pattern_t), comm_pattern_free_voidp);
  26     xbt_dynar_foreach(incomplete_process_comms, cursor, comm) {
  27       mc_comm_pattern_t copy_comm = xbt_new0(s_mc_comm_pattern_t, 1);
  28       copy_comm->index = comm->index;
  29       copy_comm->type = comm->type;
  30       copy_comm->comm = comm->comm;
  31       copy_comm->rdv = strdup(comm->rdv);
  32       copy_comm->data_size = -1;
  33       copy_comm->data = NULL;
  34       if(comm->type == SIMIX_COMM_SEND){
  35         copy_comm->src_proc = comm->src_proc;
  36         copy_comm->src_host = comm->src_host;
  37         if (comm->data != NULL) {
  38           copy_comm->data_size = comm->data_size;
  39           copy_comm->data = xbt_malloc0(comm->data_size);
  40           memcpy(copy_comm->data, comm->data, comm->data_size);
  41         }
  42       }else{
  43         copy_comm->dst_proc = comm->dst_proc;
  44         copy_comm->dst_host = comm->dst_host;
  45       }
  46       xbt_dynar_push(incomplete_process_comms_copy, &copy_comm);
  47     }
  48     xbt_dynar_insert_at(state->incomplete_comm_pattern, i, &incomplete_process_comms_copy);
  49   }
  50 }
  51
  52 static void copy_index_communications_pattern(mc_state_t state) {
  53
  54   state->index_comm = xbt_dynar_new(sizeof(unsigned int), NULL);
  55   mc_list_comm_pattern_t list_process_comm;
  56   unsigned int cursor;
  57   xbt_dynar_foreach(initial_communications_pattern, cursor, list_process_comm){
  58     xbt_dynar_push_as(state->index_comm, unsigned int, list_process_comm->index_comm);
  59   }
  60 }
  61
  62 /**
  63  * \brief Creates a state data structure used by the exploration algorithm
  64  */
  65 mc_state_t MC_state_new()
  66 {
  67   mc_state_t state = NULL;
  68
  69   state = xbt_new0(s_mc_state_t, 1);
  70   state->max_pid = simix_process_maxpid;
  71   state->proc_status = xbt_new0(s_mc_procstate_t, state->max_pid);
  72   state->system_state = NULL;
  73   state->num = ++mc_stats->expanded_states;
  74   state->in_visited_states = 0;
  75   state->incomplete_comm_pattern = NULL;
  76   /* Stateful model checking */
  77   if((_sg_mc_checkpoint > 0 && (mc_stats->expanded_states % _sg_mc_checkpoint == 0)) ||  _sg_mc_termination){
  78     state->system_state = MC_take_snapshot(state->num);
  79     if(_sg_mc_comms_determinism || _sg_mc_send_determinism){
  80       copy_incomplete_communications_pattern(state);
  81       copy_index_communications_pattern(state);
  82     }
  83   }
  84   return state;
  85 }
  86
  87 /**
  88  * \brief Deletes a state data structure
  89  * \param trans The state to be deleted
  90  */
  91 void MC_state_delete(mc_state_t state, int free_snapshot){
  92   if (state->system_state && free_snapshot){
  93     MC_free_snapshot(state->system_state);
  94   }
  95   if(_sg_mc_comms_determinism || _sg_mc_send_determinism){
  96     xbt_free(state->index_comm);
  97     xbt_free(state->incomplete_comm_pattern);
  98   }
  99   xbt_free(state->proc_status);
 100   xbt_free(state);
 101 }
 102
 103 void MC_state_interleave_process(mc_state_t state, smx_process_t process)
 104 {
 105   assert(state);
 106   state->proc_status[process->pid].state = MC_INTERLEAVE;
 107   state->proc_status[process->pid].interleave_count = 0;
 108 }
 109
 110 void MC_state_remove_interleave_process(mc_state_t state, smx_process_t process)
 111 {
 112   if (state->proc_status[process->pid].state == MC_INTERLEAVE)
 113     state->proc_status[process->pid].state = MC_DONE;
 114 }
 115
 116 unsigned int MC_state_interleave_size(mc_state_t state)
 117 {
 118   unsigned int i, size = 0;
 119
 120   for (i = 0; i < state->max_pid; i++) {
 121     if ((state->proc_status[i].state == MC_INTERLEAVE)
 122         || (state->proc_status[i].state == MC_MORE_INTERLEAVE))
 123       size++;
 124   }
 125
 126   return size;
 127 }
 128
 129 int MC_state_process_is_done(mc_state_t state, smx_process_t process)
 130 {
 131   return state->proc_status[process->pid].state == MC_DONE ? TRUE : FALSE;
 132 }
 133
 134 void MC_state_set_executed_request(mc_state_t state, smx_simcall_t req,
 135                                    int value)
 136 {
 137   state->executed_req = *req;
 138   state->req_num = value;
 139   smx_process_t process = NULL;
 140   mc_procstate_t procstate = NULL;
 141
 142   /* The waitany and testany request are transformed into a wait or test request over the
 143    * corresponding communication action so it can be treated later by the dependence
 144    * function. */
 145   switch (req->call) {
 146   case SIMCALL_COMM_WAITANY:
 147     state->internal_req.call = SIMCALL_COMM_WAIT;
 148     state->internal_req.issuer = req->issuer;
 149     // FIXME, read from remote process
 150     state->internal_comm =
 151         *xbt_dynar_get_as(simcall_comm_waitany__get__comms(req), value,
 152                           smx_synchro_t);
 153     simcall_comm_wait__set__comm(&state->internal_req, &state->internal_comm);
 154     simcall_comm_wait__set__timeout(&state->internal_req, 0);
 155     break;
 156
 157   case SIMCALL_COMM_TESTANY:
 158     state->internal_req.call = SIMCALL_COMM_TEST;
 159     state->internal_req.issuer = req->issuer;
 160
 161     if (value > 0)
 162       // FIXME, read from remote process
 163       state->internal_comm =
 164           *xbt_dynar_get_as(simcall_comm_testany__get__comms(req), value,
 165                             smx_synchro_t);
 166
 167     simcall_comm_test__set__comm(&state->internal_req, &state->internal_comm);
 168     simcall_comm_test__set__result(&state->internal_req, value);
 169     break;
 170
 171   case SIMCALL_COMM_WAIT:
 172     state->internal_req = *req;
 173     // FIXME, read from remote process
 174     state->internal_comm = *(simcall_comm_wait__get__comm(req));
 175     simcall_comm_wait__set__comm(&state->executed_req, &state->internal_comm);
 176     simcall_comm_wait__set__comm(&state->internal_req, &state->internal_comm);
 177     break;
 178
 179   case SIMCALL_COMM_TEST:
 180     state->internal_req = *req;
 181     // FIXME, read from remote process
 182     state->internal_comm = *simcall_comm_test__get__comm(req);
 183     simcall_comm_test__set__comm(&state->executed_req, &state->internal_comm);
 184     simcall_comm_test__set__comm(&state->internal_req, &state->internal_comm);
 185     break;
 186
 187   case SIMCALL_MC_RANDOM:
 188     state->internal_req = *req;
 189     int random_max = simcall_mc_random__get__max(req);
 190     if (value != random_max) {
 191       MC_EACH_SIMIX_PROCESS(process,
 192         procstate = &state->proc_status[process->pid];
 193         const smx_process_t issuer = MC_smx_simcall_get_issuer(req);
 194         if (process->pid == issuer->pid) {
 195           procstate->state = MC_MORE_INTERLEAVE;
 196           break;
 197         }
 198       );
 199     }
 200     break;
 201
 202   default:
 203     state->internal_req = *req;
 204     break;
 205   }
 206 }
 207
 208 smx_simcall_t MC_state_get_executed_request(mc_state_t state, int *value)
 209 {
 210   *value = state->req_num;
 211   return &state->executed_req;
 212 }
 213
 214 smx_simcall_t MC_state_get_internal_request(mc_state_t state)
 215 {
 216   return &state->internal_req;
 217 }
 218
 219 smx_simcall_t MC_state_get_request(mc_state_t state, int *value)
 220 {
 221   smx_process_t process = NULL;
 222   mc_procstate_t procstate = NULL;
 223   unsigned int start_count;
 224   smx_synchro_t act = NULL;
 225
 226   MC_EACH_SIMIX_PROCESS(process,
 227     procstate = &state->proc_status[process->pid];
 228
 229     if (procstate->state == MC_INTERLEAVE
 230         || procstate->state == MC_MORE_INTERLEAVE) {
 231       if (MC_process_is_enabled(process)) {
 232         switch (process->simcall.call) {
 233         case SIMCALL_COMM_WAITANY:
 234           *value = -1;
 235           while (procstate->interleave_count <
 236                  xbt_dynar_length(simcall_comm_waitany__get__comms
 237                                   (&process->simcall))) {
 238             if (MC_request_is_enabled_by_idx
 239                 (&process->simcall, procstate->interleave_count++)) {
 240               *value = procstate->interleave_count - 1;
 241               break;
 242             }
 243           }
 244
 245           if (procstate->interleave_count >=
 246               xbt_dynar_length(simcall_comm_waitany__get__comms
 247                                (&process->simcall)))
 248             procstate->state = MC_DONE;
 249
 250           if (*value != -1)
 251             return &process->simcall;
 252
 253           break;
 254
 255         case SIMCALL_COMM_TESTANY:
 256           start_count = procstate->interleave_count;
 257           *value = -1;
 258           while (procstate->interleave_count <
 259                  xbt_dynar_length(simcall_comm_testany__get__comms
 260                                   (&process->simcall))) {
 261             if (MC_request_is_enabled_by_idx
 262                 (&process->simcall, procstate->interleave_count++)) {
 263               *value = procstate->interleave_count - 1;
 264               break;
 265             }
 266           }
 267
 268           if (procstate->interleave_count >=
 269               xbt_dynar_length(simcall_comm_testany__get__comms
 270                                (&process->simcall)))
 271             procstate->state = MC_DONE;
 272
 273           if (*value != -1 || start_count == 0)
 274             return &process->simcall;
 275
 276           break;
 277
 278         case SIMCALL_COMM_WAIT:
 279           act = simcall_comm_wait__get__comm(&process->simcall);
 280           if (act->comm.src_proc && act->comm.dst_proc) {
 281             *value = 0;
 282           } else {
 283             if (act->comm.src_proc == NULL && act->comm.type == SIMIX_COMM_READY
 284                 && act->comm.detached == 1)
 285               *value = 0;
 286             else
 287               *value = -1;
 288           }
 289           procstate->state = MC_DONE;
 290           return &process->simcall;
 291
 292           break;
 293
 294         case SIMCALL_MC_RANDOM:
 295           if (procstate->state == MC_INTERLEAVE)
 296             *value = 0;
 297           else {
 298             if (state->req_num < simcall_mc_random__get__max(&process->simcall))
 299               *value = state->req_num + 1;
 300           }
 301           procstate->state = MC_DONE;
 302           return &process->simcall;
 303           break;
 304
 305         default:
 306           procstate->state = MC_DONE;
 307           *value = 0;
 308           return &process->simcall;
 309           break;
 310         }
 311       }
 312     }
 313   );
 314
 315   return NULL;
 316 }