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>
25 namespace simgrid::mc {
27 XBT_DECLARE_ENUM_CLASS(MessageType, NONE, NEED_MEMINFO, NEED_MEMINFO_REPLY, FORK, FORK_REPLY, WAIT_CHILD,
28 WAIT_CHILD_REPLY, CONTINUE, IGNORE_HEAP, UNIGNORE_HEAP, IGNORE_MEMORY, UNIGNORE_MEMORY,
29 STACK_REGION, REGISTER_SYMBOL, DEADLOCK_CHECK, DEADLOCK_CHECK_REPLY, WAITING, SIMCALL_EXECUTE,
30 SIMCALL_EXECUTE_REPLY, ASSERTION_FAILED, ACTORS_STATUS, ACTORS_STATUS_REPLY_COUNT,
31 ACTORS_STATUS_REPLY_SIMCALL, ACTORS_STATUS_REPLY_TRANSITION, ACTORS_MAXPID, ACTORS_MAXPID_REPLY,
32 FINALIZE, FINALIZE_REPLY);
33 } // namespace simgrid::mc
35 constexpr unsigned MC_MESSAGE_LENGTH = 512;
36 constexpr unsigned MC_SOCKET_NAME_LEN = sizeof(sockaddr_un::sun_path);
37 constexpr unsigned SIMCALL_SERIALIZATION_BUFFER_SIZE = 2048;
39 /** Basic structure for a MC message
41 * The current version of the client/server protocol sends C structures over `AF_UNIX`
42 * `SOCK_SEQPACKET` sockets. This means that the protocol is ABI/architecture specific:
43 * we currently can't model-check a x86 process from a x86_64 process.
45 * Moreover the protocol is not stable. The same version of the library should be used
46 * for the client and the server.
49 /* Basic structure: all message start with a message type */
50 struct s_mc_message_t {
51 simgrid::mc::MessageType type;
54 struct s_mc_message_int_t {
55 simgrid::mc::MessageType type;
60 struct s_mc_message_ignore_heap_t {
61 simgrid::mc::MessageType type;
68 struct s_mc_message_ignore_memory_t {
69 simgrid::mc::MessageType type;
74 struct s_mc_message_stack_region_t {
75 simgrid::mc::MessageType type;
76 s_stack_region_t stack_region;
79 struct s_mc_message_register_symbol_t {
80 simgrid::mc::MessageType type;
81 std::array<char, 128> name;
82 int (*callback)(void*);
86 /* Server -> client */
87 struct s_mc_message_need_meminfo_reply_t {
88 simgrid::mc::MessageType type;
89 xbt_mheap_t mmalloc_default_mdp;
92 struct s_mc_message_fork_t {
93 simgrid::mc::MessageType type;
94 std::array<char, MC_SOCKET_NAME_LEN> socket_name;
97 struct s_mc_message_simcall_execute_t {
98 simgrid::mc::MessageType type;
100 int times_considered_;
102 struct s_mc_message_simcall_execute_answer_t {
103 simgrid::mc::MessageType type;
104 std::array<char, SIMCALL_SERIALIZATION_BUFFER_SIZE> buffer;
107 struct s_mc_message_restore_t {
108 simgrid::mc::MessageType type;
112 struct s_mc_message_actors_status_answer_t {
113 simgrid::mc::MessageType type;
116 struct s_mc_message_actors_status_one_t { // an array of `s_mc_message_actors_status_one_t[count]` is sent right after
117 // after a `s_mc_message_actors_status_answer_t`
118 simgrid::mc::MessageType type;
124 // Answer from an actor to the question "what are you about to run?"
125 struct s_mc_message_simcall_probe_one_t { // a series of `s_mc_message_simcall_probe_one_t`
126 // is sent right after `s_mc_message_actors_status_one_t[]`
127 simgrid::mc::MessageType type;
128 std::array<char, SIMCALL_SERIALIZATION_BUFFER_SIZE> buffer;
131 #endif // __cplusplus