1 /* Copyright (c) 2015-2023. The SimGrid Team. All rights reserved. */
3 /* This program is free software; you can redistribute it and/or modify it
4 * under the terms of the license (GNU LGPL) which comes with this package. */
6 #ifndef SIMGRID_MC_PROTOCOL_H
7 #define SIMGRID_MC_PROTOCOL_H
9 // ***** Environment variables for passing context to the model-checked process
13 #include "src/kernel/actor/SimcallObserver.hpp"
15 #include "simgrid/forward.h" // aid_t
16 #include "src/mc/datatypes.h"
17 #include "src/xbt/mmalloc/mmalloc.h"
18 #include <xbt/utility.hpp>
24 namespace simgrid::mc {
26 XBT_DECLARE_ENUM_CLASS(MessageType, NONE, INITIAL_ADDRESSES, INITIAL_ADDRESSES_REPLY, CONTINUE, IGNORE_HEAP,
27 UNIGNORE_HEAP, IGNORE_MEMORY, STACK_REGION, REGISTER_SYMBOL, DEADLOCK_CHECK,
28 DEADLOCK_CHECK_REPLY, WAITING, SIMCALL_EXECUTE, SIMCALL_EXECUTE_ANSWER, ASSERTION_FAILED,
29 ACTORS_STATUS, ACTORS_STATUS_REPLY, ACTORS_MAXPID, ACTORS_MAXPID_REPLY, FINALIZE,
31 } // namespace simgrid::mc
33 constexpr unsigned MC_MESSAGE_LENGTH = 512;
34 constexpr unsigned SIMCALL_SERIALIZATION_BUFFER_SIZE = 2048;
36 /** Basic structure for a MC message
38 * The current version of the client/server protocol sends C structures over `AF_LOCAL`
39 * `SOCK_SEQPACKET` sockets. This means that the protocol is ABI/architecture specific:
40 * we currently can't model-check a x86 process from a x86_64 process.
42 * Moreover the protocol is not stable. The same version of the library should be used
43 * for the client and the server.
46 /* Basic structure: all message start with a message type */
47 struct s_mc_message_t {
48 simgrid::mc::MessageType type;
51 struct s_mc_message_int_t {
52 simgrid::mc::MessageType type;
57 struct s_mc_message_ignore_heap_t {
58 simgrid::mc::MessageType type;
65 struct s_mc_message_ignore_memory_t {
66 simgrid::mc::MessageType type;
71 struct s_mc_message_stack_region_t {
72 simgrid::mc::MessageType type;
73 s_stack_region_t stack_region;
76 struct s_mc_message_register_symbol_t {
77 simgrid::mc::MessageType type;
78 std::array<char, 128> name;
79 int (*callback)(void*);
83 /* Server -> client */
84 struct s_mc_message_initial_addresses_reply_t {
85 simgrid::mc::MessageType type;
86 xbt_mheap_t mmalloc_default_mdp;
89 struct s_mc_message_simcall_execute_t {
90 simgrid::mc::MessageType type;
92 int times_considered_;
94 struct s_mc_message_simcall_execute_answer_t {
95 simgrid::mc::MessageType type;
96 std::array<char, SIMCALL_SERIALIZATION_BUFFER_SIZE> buffer;
99 struct s_mc_message_restore_t {
100 simgrid::mc::MessageType type;
104 struct s_mc_message_actors_status_answer_t {
105 simgrid::mc::MessageType type;
108 struct s_mc_message_actors_status_one_t { // an array of `s_mc_message_actors_status_one_t[count]` is sent right after
109 // after a `s_mc_message_actors_status_answer_t`
114 // The total number of transitions that are serialized and associated with this actor.
115 // Enforced to be either `0` or the same as `max_considered`
119 // Answer from an actor to the question "what are you about to run?"
120 struct s_mc_message_simcall_probe_one_t { // a series of `s_mc_message_simcall_probe_one_t`
121 // is sent right after `s_mc_message_actors_status_one_t[]`
122 std::array<char, SIMCALL_SERIALIZATION_BUFFER_SIZE> buffer;
125 #endif // __cplusplus