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. */
12 #include <xbt/sysdep.h>
14 #include "src/simix/smx_private.h"
15 #include "src/mc/mc_state.h"
16 #include "src/mc/mc_request.h"
17 #include "src/mc/mc_private.h"
18 #include "src/mc/mc_comm_pattern.h"
19 #include "src/mc/mc_smx.h"
20 #include "src/mc/mc_xbt.hpp"
22 using simgrid::mc::remote;
24 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_state, mc,
25 "Logging specific to MC (state)");
28 * \brief Creates a state data structure used by the exploration algorithm
30 simgrid::mc::State* MC_state_new()
32 simgrid::mc::State* state = new simgrid::mc::State();
33 state->processStates.resize(MC_smx_get_maxpid());
34 state->num = ++mc_stats->expanded_states;
35 /* Stateful model checking */
36 if((_sg_mc_checkpoint > 0 && (mc_stats->expanded_states % _sg_mc_checkpoint == 0)) || _sg_mc_termination){
37 state->system_state = simgrid::mc::take_snapshot(state->num);
38 if(_sg_mc_comms_determinism || _sg_mc_send_determinism){
39 MC_state_copy_incomplete_communications_pattern(state);
40 MC_state_copy_index_communications_pattern(state);
51 std::memset(&this->internal_comm, 0, sizeof(this->internal_comm));
52 std::memset(&this->internal_req, 0, sizeof(this->internal_req));
53 std::memset(&this->executed_req, 0, sizeof(this->executed_req));
56 std::size_t State::interleaveSize() const
58 return std::count_if(this->processStates.begin(), this->processStates.end(),
59 [](simgrid::mc::ProcessState const& state) { return state.interleave(); });
65 void MC_state_interleave_process(simgrid::mc::State* state, smx_process_t process)
68 state->processStates[process->pid].state = simgrid::mc::ProcessInterleaveState::interleave;
69 state->processStates[process->pid].interleave_count = 0;
72 void MC_state_remove_interleave_process(simgrid::mc::State* state, smx_process_t process)
74 if (state->processStates[process->pid].state == simgrid::mc::ProcessInterleaveState::interleave)
75 state->processStates[process->pid].state = simgrid::mc::ProcessInterleaveState::done;
78 void MC_state_set_executed_request(simgrid::mc::State* state, smx_simcall_t req,
81 state->executed_req = *req;
82 state->req_num = value;
84 /* The waitany and testany request are transformed into a wait or test request over the
85 * corresponding communication action so it can be treated later by the dependence
88 case SIMCALL_COMM_WAITANY: {
89 state->internal_req.call = SIMCALL_COMM_WAIT;
90 state->internal_req.issuer = req->issuer;
91 smx_synchro_t remote_comm;
92 read_element(mc_model_checker->process(),
93 &remote_comm, remote(simcall_comm_waitany__get__comms(req)),
94 value, sizeof(remote_comm));
95 mc_model_checker->process().read(&state->internal_comm, remote(remote_comm));
96 simcall_comm_wait__set__comm(&state->internal_req, &state->internal_comm);
97 simcall_comm_wait__set__timeout(&state->internal_req, 0);
101 case SIMCALL_COMM_TESTANY:
102 state->internal_req.call = SIMCALL_COMM_TEST;
103 state->internal_req.issuer = req->issuer;
106 smx_synchro_t remote_comm;
107 read_element(mc_model_checker->process(),
108 &remote_comm, remote(simcall_comm_testany__get__comms(req)),
109 value, sizeof(remote_comm));
110 mc_model_checker->process().read(&state->internal_comm, remote(remote_comm));
113 simcall_comm_test__set__comm(&state->internal_req, &state->internal_comm);
114 simcall_comm_test__set__result(&state->internal_req, value);
117 case SIMCALL_COMM_WAIT:
118 state->internal_req = *req;
119 mc_model_checker->process().read_bytes(&state->internal_comm ,
120 sizeof(state->internal_comm), remote(simcall_comm_wait__get__comm(req)));
121 simcall_comm_wait__set__comm(&state->executed_req, &state->internal_comm);
122 simcall_comm_wait__set__comm(&state->internal_req, &state->internal_comm);
125 case SIMCALL_COMM_TEST:
126 state->internal_req = *req;
127 mc_model_checker->process().read_bytes(&state->internal_comm,
128 sizeof(state->internal_comm), remote(simcall_comm_test__get__comm(req)));
129 simcall_comm_test__set__comm(&state->executed_req, &state->internal_comm);
130 simcall_comm_test__set__comm(&state->internal_req, &state->internal_comm);
133 case SIMCALL_MC_RANDOM: {
134 state->internal_req = *req;
135 int random_max = simcall_mc_random__get__max(req);
136 if (value != random_max)
137 for (auto& p : mc_model_checker->process().simix_processes()) {
138 simgrid::mc::ProcessState* procstate = &state->processStates[p.copy.pid];
139 const smx_process_t issuer = MC_smx_simcall_get_issuer(req);
140 if (p.copy.pid == issuer->pid) {
141 procstate->state = simgrid::mc::ProcessInterleaveState::more_interleave;
149 state->internal_req = *req;
154 smx_simcall_t MC_state_get_executed_request(simgrid::mc::State* state, int *value)
156 *value = state->req_num;
157 return &state->executed_req;
160 smx_simcall_t MC_state_get_internal_request(simgrid::mc::State* state)
162 return &state->internal_req;
165 static inline smx_simcall_t MC_state_get_request_for_process(
166 simgrid::mc::State* state, int*value, smx_process_t process)
168 simgrid::mc::ProcessState* procstate = &state->processStates[process->pid];
170 if (!procstate->interleave())
172 if (!simgrid::mc::process_is_enabled(process))
175 switch (process->simcall.call) {
177 case SIMCALL_COMM_WAITANY:
179 while (procstate->interleave_count <
180 read_length(mc_model_checker->process(),
181 remote(simcall_comm_waitany__get__comms(&process->simcall)))) {
182 if (simgrid::mc::request_is_enabled_by_idx(&process->simcall,
183 procstate->interleave_count++)) {
184 *value = procstate->interleave_count - 1;
189 if (procstate->interleave_count >=
190 simgrid::mc::read_length(mc_model_checker->process(),
191 simgrid::mc::remote(simcall_comm_waitany__get__comms(&process->simcall))))
192 procstate->state = simgrid::mc::ProcessInterleaveState::done;
195 return &process->simcall;
199 case SIMCALL_COMM_TESTANY: {
200 unsigned start_count = procstate->interleave_count;
202 while (procstate->interleave_count <
203 read_length(mc_model_checker->process(),
204 remote(simcall_comm_testany__get__comms(&process->simcall))))
205 if (simgrid::mc::request_is_enabled_by_idx(&process->simcall,
206 procstate->interleave_count++)) {
207 *value = procstate->interleave_count - 1;
211 if (procstate->interleave_count >=
212 read_length(mc_model_checker->process(),
213 remote(simcall_comm_testany__get__comms(&process->simcall))))
214 procstate->state = simgrid::mc::ProcessInterleaveState::done;
216 if (*value != -1 || start_count == 0)
217 return &process->simcall;
222 case SIMCALL_COMM_WAIT: {
223 smx_synchro_t remote_act = simcall_comm_wait__get__comm(&process->simcall);
225 mc_model_checker->process().read_bytes(
226 &act, sizeof(act), remote(remote_act));
227 if (act.comm.src_proc && act.comm.dst_proc)
229 else if (act.comm.src_proc == nullptr && act.comm.type == SIMIX_COMM_READY
230 && act.comm.detached == 1)
234 procstate->state = simgrid::mc::ProcessInterleaveState::done;
235 return &process->simcall;
238 case SIMCALL_MC_RANDOM:
239 if (procstate->state == simgrid::mc::ProcessInterleaveState::interleave)
240 *value = simcall_mc_random__get__min(&process->simcall);
241 else if (state->req_num < simcall_mc_random__get__max(&process->simcall))
242 *value = state->req_num + 1;
243 procstate->state = simgrid::mc::ProcessInterleaveState::done;
244 return &process->simcall;
247 procstate->state = simgrid::mc::ProcessInterleaveState::done;
249 return &process->simcall;
254 smx_simcall_t MC_state_get_request(simgrid::mc::State* state, int *value)
256 for (auto& p : mc_model_checker->process().simix_processes()) {
257 smx_simcall_t res = MC_state_get_request_for_process(state, value, &p.copy);