1 /* Copyright (c) 2007-2015. 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. */
7 #ifndef SIMGRID_MC_STATE_H
8 #define SIMGRID_MC_STATE_H
14 #include <xbt/dynar.h>
16 #include <simgrid_config.h>
17 #include "src/simix/smx_private.h"
18 #include "src/mc/mc_snapshot.h"
23 extern XBT_PRIVATE std::unique_ptr<s_mc_global_t> initial_global_state;
25 struct PatternCommunication {
27 smx_synchro_t comm_addr;
28 e_smx_comm_type_t type = SIMIX_COMM_SEND;
29 unsigned long src_proc = 0;
30 unsigned long dst_proc = 0;
31 const char *src_host = nullptr;
32 const char *dst_host = nullptr;
34 std::vector<char> data;
38 PatternCommunication()
40 std::memset(&comm_addr, 0, sizeof(comm_addr));
43 PatternCommunication dup() const
45 simgrid::mc::PatternCommunication res;
47 res.comm_addr = this->comm_addr;
48 res.type = this->type;
51 res.dst_proc = this->dst_proc;
52 res.dst_host = this->dst_host;
54 res.data = this->data;
56 res.index = this->index;
62 /* On every state, each process has an entry of the following type */
64 /* Possible exploration status of a process in a state */
65 enum class InterleavingType {
66 /** We do not have to execute this process transitions */
68 /** We still have to execute (some of) this process transitions */
70 /** We have already executed this process transitions */
74 /** Exploration control information */
75 InterleavingType state = InterleavingType::disabled;
78 /** Number of times that the process was interleaved */
79 // TODO, make this private
80 unsigned int interleave_count = 0;
82 bool isDisabled() const
84 return this->state == InterleavingType::disabled;
88 return this->state == InterleavingType::done;
90 bool isToInterleave() const
92 return this->state == InterleavingType::interleave;
96 this->state = InterleavingType::interleave;
97 this->interleave_count = 0;
101 this->state = InterleavingType::done;
105 /* An exploration state.
107 * The `executed_state` is sometimes transformed into another `internal_req`.
108 * For example WAITANY is transformes into a WAIT and TESTANY into TEST.
109 * See `MC_state_get_request_for_process()`.
111 struct XBT_PRIVATE State {
113 /** Sequential state number (used for debugging) */
116 /* Next transition to explore for this communication
118 * Some transitions are not deterministic such as:
120 * * waitany which can receive different messages;
122 * * random which can produce different values.
124 * This variable is used to keep track of which transition
125 * should be explored next for a given simcall.
129 /** State's exploration status by process */
130 std::vector<ProcessState> processStates;
133 s_smx_simcall_t executed_req;
135 /* Internal translation of the simcall
137 * IMCALL_COMM_TESTANY is translated to a SIMCALL_COMM_TEST
138 * and SIMCALL_COMM_WAITANY to a SIMCALL_COMM_WAIT.
140 s_smx_simcall_t internal_req;
142 /* Can be used as a copy of the remote synchro object */
143 s_smx_synchro_t internal_comm;
145 /** Snapshot of system state (if needed) */
146 std::shared_ptr<simgrid::mc::Snapshot> system_state;
148 // For CommunicationDeterminismChecker
149 std::vector<std::vector<simgrid::mc::PatternCommunication>> incomplete_comm_pattern;
150 std::vector<unsigned> communicationIndices;
154 std::size_t interleaveSize() const;
155 void interleave(smx_process_t process)
157 this->processStates[process->pid].interleave();
161 XBT_PRIVATE void replay(std::list<std::unique_ptr<simgrid::mc::State>> const& stack);
166 XBT_PRIVATE simgrid::mc::State* MC_state_new(void);
167 XBT_PRIVATE smx_simcall_t MC_state_get_executed_request(simgrid::mc::State* state, int *value);
168 XBT_PRIVATE smx_simcall_t MC_state_get_internal_request(simgrid::mc::State* state);
169 XBT_PRIVATE smx_simcall_t MC_state_get_request(simgrid::mc::State* state, int *value);