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 smx_process_t process = nullptr;
107 /* The waitany and testany request are transformed into a wait or test request over the
108 * corresponding communication action so it can be treated later by the dependence
111 case SIMCALL_COMM_WAITANY: {
112 state->internal_req.call = SIMCALL_COMM_WAIT;
113 state->internal_req.issuer = req->issuer;
114 smx_synchro_t remote_comm;
115 read_element(mc_model_checker->process(),
116 &remote_comm, remote(simcall_comm_waitany__get__comms(req)),
117 value, sizeof(remote_comm));
118 mc_model_checker->process().read(&state->internal_comm, remote(remote_comm));
119 simcall_comm_wait__set__comm(&state->internal_req, &state->internal_comm);
120 simcall_comm_wait__set__timeout(&state->internal_req, 0);
124 case SIMCALL_COMM_TESTANY:
125 state->internal_req.call = SIMCALL_COMM_TEST;
126 state->internal_req.issuer = req->issuer;
129 smx_synchro_t remote_comm;
130 read_element(mc_model_checker->process(),
131 &remote_comm, remote(simcall_comm_testany__get__comms(req)),
132 value, sizeof(remote_comm));
133 mc_model_checker->process().read(&state->internal_comm, remote(remote_comm));
136 simcall_comm_test__set__comm(&state->internal_req, &state->internal_comm);
137 simcall_comm_test__set__result(&state->internal_req, value);
140 case SIMCALL_COMM_WAIT:
141 state->internal_req = *req;
142 mc_model_checker->process().read_bytes(&state->internal_comm ,
143 sizeof(state->internal_comm), remote(simcall_comm_wait__get__comm(req)));
144 simcall_comm_wait__set__comm(&state->executed_req, &state->internal_comm);
145 simcall_comm_wait__set__comm(&state->internal_req, &state->internal_comm);
148 case SIMCALL_COMM_TEST:
149 state->internal_req = *req;
150 mc_model_checker->process().read_bytes(&state->internal_comm,
151 sizeof(state->internal_comm), remote(simcall_comm_test__get__comm(req)));
152 simcall_comm_test__set__comm(&state->executed_req, &state->internal_comm);
153 simcall_comm_test__set__comm(&state->internal_req, &state->internal_comm);
156 case SIMCALL_MC_RANDOM: {
157 state->internal_req = *req;
158 int random_max = simcall_mc_random__get__max(req);
159 if (value != random_max) {
160 MC_EACH_SIMIX_PROCESS(process,
161 mc_procstate_t procstate = &state->proc_status[process->pid];
162 const smx_process_t issuer = MC_smx_simcall_get_issuer(req);
163 if (process->pid == issuer->pid) {
164 procstate->state = MC_MORE_INTERLEAVE;
173 state->internal_req = *req;
178 smx_simcall_t MC_state_get_executed_request(mc_state_t state, int *value)
180 *value = state->req_num;
181 return &state->executed_req;
184 smx_simcall_t MC_state_get_internal_request(mc_state_t state)
186 return &state->internal_req;
189 static inline smx_simcall_t MC_state_get_request_for_process(
190 mc_state_t state, int*value, smx_process_t process)
192 mc_procstate_t procstate = &state->proc_status[process->pid];
194 if (procstate->state != MC_INTERLEAVE
195 && procstate->state != MC_MORE_INTERLEAVE)
197 if (!MC_process_is_enabled(process))
200 switch (process->simcall.call) {
202 case SIMCALL_COMM_WAITANY:
204 while (procstate->interleave_count <
205 read_length(mc_model_checker->process(),
206 remote(simcall_comm_waitany__get__comms(&process->simcall)))) {
207 if (MC_request_is_enabled_by_idx
208 (&process->simcall, procstate->interleave_count++)) {
209 *value = procstate->interleave_count - 1;
214 if (procstate->interleave_count >=
215 simgrid::mc::read_length(mc_model_checker->process(),
216 simgrid::mc::remote(simcall_comm_waitany__get__comms(&process->simcall))))
217 procstate->state = MC_DONE;
220 return &process->simcall;
224 case SIMCALL_COMM_TESTANY: {
225 unsigned start_count = procstate->interleave_count;
227 while (procstate->interleave_count <
228 read_length(mc_model_checker->process(),
229 remote(simcall_comm_testany__get__comms(&process->simcall)))) {
230 if (MC_request_is_enabled_by_idx
231 (&process->simcall, procstate->interleave_count++)) {
232 *value = procstate->interleave_count - 1;
237 if (procstate->interleave_count >=
238 read_length(mc_model_checker->process(),
239 remote(simcall_comm_testany__get__comms(&process->simcall))))
240 procstate->state = MC_DONE;
242 if (*value != -1 || start_count == 0)
243 return &process->simcall;
248 case SIMCALL_COMM_WAIT: {
249 smx_synchro_t remote_act = simcall_comm_wait__get__comm(&process->simcall);
251 mc_model_checker->process().read_bytes(
252 &act, sizeof(act), remote(remote_act));
253 if (act.comm.src_proc && act.comm.dst_proc) {
256 if (act.comm.src_proc == nullptr && act.comm.type == SIMIX_COMM_READY
257 && act.comm.detached == 1)
262 procstate->state = MC_DONE;
263 return &process->simcall;
266 case SIMCALL_MC_RANDOM:
267 if (procstate->state == MC_INTERLEAVE)
268 *value = simcall_mc_random__get__min(&process->simcall);
270 if (state->req_num < simcall_mc_random__get__max(&process->simcall))
271 *value = state->req_num + 1;
273 procstate->state = MC_DONE;
274 return &process->simcall;
277 procstate->state = MC_DONE;
279 return &process->simcall;
284 smx_simcall_t MC_state_get_request(mc_state_t state, int *value)
286 smx_process_t process = nullptr;
287 MC_EACH_SIMIX_PROCESS(process,
288 smx_simcall_t res = MC_state_get_request_for_process(state, value, process);