1 /* Copyright (c) 2015-2022. 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
11 /** Environment variable name used to pass the communication socket.
13 * It is set by `simgrid-mc` to enable MC support in the children processes
15 #define MC_ENV_SOCKET_FD "SIMGRID_MC_SOCKET_FD"
19 #include "src/kernel/actor/SimcallObserver.hpp"
21 #include "mc/datatypes.h"
22 #include "simgrid/forward.h" // aid_t
25 #include <xbt/dynar.h>
26 #include <xbt/mmalloc.h>
27 #include <xbt/utility.hpp>
33 XBT_DECLARE_ENUM_CLASS(MessageType, NONE, INITIAL_ADDRESSES, CONTINUE, IGNORE_HEAP, UNIGNORE_HEAP, IGNORE_MEMORY,
34 STACK_REGION, REGISTER_SYMBOL, DEADLOCK_CHECK, DEADLOCK_CHECK_REPLY, WAITING, SIMCALL_EXECUTE,
35 SIMCALL_EXECUTE_ANSWER, SIMCALL_IS_VISIBLE, SIMCALL_IS_VISIBLE_ANSWER, ASSERTION_FAILED,
36 ACTOR_ENABLED, ACTOR_ENABLED_REPLY, FINALIZE);
38 #define SIMCALL_SERIALIZATION_BUFFER_SIZE 2048
41 } // namespace simgrid
43 constexpr unsigned MC_MESSAGE_LENGTH = 512;
45 /** Basic structure for a MC message
47 * The current version of the client/server protocol sends C structures over `AF_LOCAL`
48 * `SOCK_SEQPACKET` sockets. This means that the protocol is ABI/architecture specific:
49 * we currently can't model-check a x86 process from a x86_64 process.
51 * Moreover the protocol is not stable. The same version of the library should be used
52 * for the client and the server.
55 /* Basic structure: all message start with a message type */
56 struct s_mc_message_t {
57 simgrid::mc::MessageType type;
60 struct s_mc_message_int_t {
61 simgrid::mc::MessageType type;
66 struct s_mc_message_initial_addresses_t {
67 simgrid::mc::MessageType type;
68 xbt_mheap_t mmalloc_default_mdp;
69 unsigned long* maxpid;
71 xbt_dynar_t dead_actors;
74 struct s_mc_message_ignore_heap_t {
75 simgrid::mc::MessageType type;
82 struct s_mc_message_ignore_memory_t {
83 simgrid::mc::MessageType type;
88 struct s_mc_message_stack_region_t {
89 simgrid::mc::MessageType type;
90 s_stack_region_t stack_region;
93 struct s_mc_message_register_symbol_t {
94 simgrid::mc::MessageType type;
95 std::array<char, 128> name;
96 int (*callback)(void*);
100 /* Server -> client */
101 struct s_mc_message_simcall_execute_t {
102 simgrid::mc::MessageType type;
104 int times_considered_;
106 struct s_mc_message_simcall_execute_answer_t {
107 simgrid::mc::MessageType type;
108 simgrid::mc::Transition::Type simcall;
109 char buffer[SIMCALL_SERIALIZATION_BUFFER_SIZE];
112 struct s_mc_message_restore_t {
113 simgrid::mc::MessageType type;
117 struct s_mc_message_actor_enabled_t {
118 simgrid::mc::MessageType type;
119 aid_t aid; // actor ID
123 struct s_mc_message_simcall_is_visible_t { // MessageType::SIMCALL_IS_VISIBLE
124 simgrid::mc::MessageType type;
127 struct s_mc_message_simcall_is_visible_answer_t { // MessageType::SIMCALL_IS_VISIBLE_ANSWER
128 simgrid::mc::MessageType type;
132 #endif // __cplusplus