1 /* Copyright (c) 2008-2015. The SimGrid Team.
2 * All rights reserved. */
4 /* This program is free software; you can redistribute it and/or modify it
5 * under the terms of the license (GNU LGPL) which comes with this package. */
10 #include <xbt/sysdep.h>
13 #include "src/simix/smx_private.h"
14 #include "src/mc/mc_state.h"
15 #include "src/mc/mc_request.h"
16 #include "src/mc/mc_private.h"
17 #include "src/mc/mc_comm_pattern.h"
18 #include "src/mc/mc_smx.h"
19 #include "src/mc/mc_xbt.hpp"
21 using simgrid::mc::remote;
25 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_state, mc,
26 "Logging specific to MC (state)");
29 * \brief Creates a state data structure used by the exploration algorithm
31 mc_state_t MC_state_new()
33 mc_state_t state = xbt_new0(s_mc_state_t, 1);
35 state->max_pid = MC_smx_get_maxpid();
36 state->proc_status = xbt_new0(s_mc_procstate_t, state->max_pid);
37 state->system_state = nullptr;
38 state->num = ++mc_stats->expanded_states;
39 state->in_visited_states = 0;
40 state->incomplete_comm_pattern = nullptr;
41 /* Stateful model checking */
42 if((_sg_mc_checkpoint > 0 && (mc_stats->expanded_states % _sg_mc_checkpoint == 0)) || _sg_mc_termination){
43 state->system_state = simgrid::mc::take_snapshot(state->num);
44 if(_sg_mc_comms_determinism || _sg_mc_send_determinism){
45 MC_state_copy_incomplete_communications_pattern(state);
46 MC_state_copy_index_communications_pattern(state);
53 * \brief Deletes a state data structure
54 * \param trans The state to be deleted
56 void MC_state_delete(mc_state_t state, int free_snapshot){
57 if (state->system_state && free_snapshot){
58 delete state->system_state;
60 if(_sg_mc_comms_determinism || _sg_mc_send_determinism){
61 xbt_free(state->index_comm);
62 xbt_free(state->incomplete_comm_pattern);
64 xbt_free(state->proc_status);
68 void MC_state_interleave_process(mc_state_t state, smx_process_t process)
71 state->proc_status[process->pid].state = MC_INTERLEAVE;
72 state->proc_status[process->pid].interleave_count = 0;
75 void MC_state_remove_interleave_process(mc_state_t state, smx_process_t process)
77 if (state->proc_status[process->pid].state == MC_INTERLEAVE)
78 state->proc_status[process->pid].state = MC_DONE;
81 unsigned int MC_state_interleave_size(mc_state_t state)
83 unsigned int i, size = 0;
85 for (i = 0; i < state->max_pid; i++) {
86 if ((state->proc_status[i].state == MC_INTERLEAVE)
87 || (state->proc_status[i].state == MC_MORE_INTERLEAVE))
94 int MC_state_process_is_done(mc_state_t state, smx_process_t process)
96 return state->proc_status[process->pid].state == MC_DONE ? TRUE : FALSE;
99 void MC_state_set_executed_request(mc_state_t state, smx_simcall_t req,
102 state->executed_req = *req;
103 state->req_num = value;
105 /* The waitany and testany request are transformed into a wait or test request over the
106 * corresponding communication action so it can be treated later by the dependence
109 case SIMCALL_COMM_WAITANY: {
110 state->internal_req.call = SIMCALL_COMM_WAIT;
111 state->internal_req.issuer = req->issuer;
112 smx_synchro_t remote_comm;
113 read_element(mc_model_checker->process(),
114 &remote_comm, remote(simcall_comm_waitany__get__comms(req)),
115 value, sizeof(remote_comm));
116 mc_model_checker->process().read(&state->internal_comm, remote(remote_comm));
117 simcall_comm_wait__set__comm(&state->internal_req, &state->internal_comm);
118 simcall_comm_wait__set__timeout(&state->internal_req, 0);
122 case SIMCALL_COMM_TESTANY:
123 state->internal_req.call = SIMCALL_COMM_TEST;
124 state->internal_req.issuer = req->issuer;
127 smx_synchro_t remote_comm;
128 read_element(mc_model_checker->process(),
129 &remote_comm, remote(simcall_comm_testany__get__comms(req)),
130 value, sizeof(remote_comm));
131 mc_model_checker->process().read(&state->internal_comm, remote(remote_comm));
134 simcall_comm_test__set__comm(&state->internal_req, &state->internal_comm);
135 simcall_comm_test__set__result(&state->internal_req, value);
138 case SIMCALL_COMM_WAIT:
139 state->internal_req = *req;
140 mc_model_checker->process().read_bytes(&state->internal_comm ,
141 sizeof(state->internal_comm), remote(simcall_comm_wait__get__comm(req)));
142 simcall_comm_wait__set__comm(&state->executed_req, &state->internal_comm);
143 simcall_comm_wait__set__comm(&state->internal_req, &state->internal_comm);
146 case SIMCALL_COMM_TEST:
147 state->internal_req = *req;
148 mc_model_checker->process().read_bytes(&state->internal_comm,
149 sizeof(state->internal_comm), remote(simcall_comm_test__get__comm(req)));
150 simcall_comm_test__set__comm(&state->executed_req, &state->internal_comm);
151 simcall_comm_test__set__comm(&state->internal_req, &state->internal_comm);
154 case SIMCALL_MC_RANDOM: {
155 state->internal_req = *req;
156 int random_max = simcall_mc_random__get__max(req);
157 if (value != random_max) {
158 for (auto& p : mc_model_checker->process().simix_processes()) {
159 mc_procstate_t procstate = &state->proc_status[p.copy.pid];
160 const smx_process_t issuer = MC_smx_simcall_get_issuer(req);
161 if (p.copy.pid == issuer->pid) {
162 procstate->state = MC_MORE_INTERLEAVE;
171 state->internal_req = *req;
176 smx_simcall_t MC_state_get_executed_request(mc_state_t state, int *value)
178 *value = state->req_num;
179 return &state->executed_req;
182 smx_simcall_t MC_state_get_internal_request(mc_state_t state)
184 return &state->internal_req;
187 static inline smx_simcall_t MC_state_get_request_for_process(
188 mc_state_t state, int*value, smx_process_t process)
190 mc_procstate_t procstate = &state->proc_status[process->pid];
192 if (procstate->state != MC_INTERLEAVE
193 && procstate->state != MC_MORE_INTERLEAVE)
195 if (!MC_process_is_enabled(process))
198 switch (process->simcall.call) {
200 case SIMCALL_COMM_WAITANY:
202 while (procstate->interleave_count <
203 read_length(mc_model_checker->process(),
204 remote(simcall_comm_waitany__get__comms(&process->simcall)))) {
205 if (MC_request_is_enabled_by_idx
206 (&process->simcall, procstate->interleave_count++)) {
207 *value = procstate->interleave_count - 1;
212 if (procstate->interleave_count >=
213 simgrid::mc::read_length(mc_model_checker->process(),
214 simgrid::mc::remote(simcall_comm_waitany__get__comms(&process->simcall))))
215 procstate->state = MC_DONE;
218 return &process->simcall;
222 case SIMCALL_COMM_TESTANY: {
223 unsigned start_count = procstate->interleave_count;
225 while (procstate->interleave_count <
226 read_length(mc_model_checker->process(),
227 remote(simcall_comm_testany__get__comms(&process->simcall)))) {
228 if (MC_request_is_enabled_by_idx
229 (&process->simcall, procstate->interleave_count++)) {
230 *value = procstate->interleave_count - 1;
235 if (procstate->interleave_count >=
236 read_length(mc_model_checker->process(),
237 remote(simcall_comm_testany__get__comms(&process->simcall))))
238 procstate->state = MC_DONE;
240 if (*value != -1 || start_count == 0)
241 return &process->simcall;
246 case SIMCALL_COMM_WAIT: {
247 smx_synchro_t remote_act = simcall_comm_wait__get__comm(&process->simcall);
249 mc_model_checker->process().read_bytes(
250 &act, sizeof(act), remote(remote_act));
251 if (act.comm.src_proc && act.comm.dst_proc) {
254 if (act.comm.src_proc == nullptr && act.comm.type == SIMIX_COMM_READY
255 && act.comm.detached == 1)
260 procstate->state = MC_DONE;
261 return &process->simcall;
264 case SIMCALL_MC_RANDOM:
265 if (procstate->state == MC_INTERLEAVE)
266 *value = simcall_mc_random__get__min(&process->simcall);
268 if (state->req_num < simcall_mc_random__get__max(&process->simcall))
269 *value = state->req_num + 1;
271 procstate->state = MC_DONE;
272 return &process->simcall;
275 procstate->state = MC_DONE;
277 return &process->simcall;
282 smx_simcall_t MC_state_get_request(mc_state_t state, int *value)
284 for (auto& p : mc_model_checker->process().simix_processes()) {
285 smx_simcall_t res = MC_state_get_request_for_process(state, value, &p.copy);