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, ASSERTION_FAILED, ACTOR_ENABLED, ACTOR_ENABLED_REPLY, FINALIZE);
38 } // namespace simgrid
40 constexpr unsigned MC_MESSAGE_LENGTH = 512;
41 constexpr unsigned SIMCALL_SERIALIZATION_BUFFER_SIZE = 2048;
43 /** Basic structure for a MC message
45 * The current version of the client/server protocol sends C structures over `AF_LOCAL`
46 * `SOCK_SEQPACKET` sockets. This means that the protocol is ABI/architecture specific:
47 * we currently can't model-check a x86 process from a x86_64 process.
49 * Moreover the protocol is not stable. The same version of the library should be used
50 * for the client and the server.
53 /* Basic structure: all message start with a message type */
54 struct s_mc_message_t {
55 simgrid::mc::MessageType type;
58 struct s_mc_message_int_t {
59 simgrid::mc::MessageType type;
64 struct s_mc_message_initial_addresses_t {
65 simgrid::mc::MessageType type;
66 xbt_mheap_t mmalloc_default_mdp;
67 unsigned long* maxpid;
71 struct s_mc_message_ignore_heap_t {
72 simgrid::mc::MessageType type;
79 struct s_mc_message_ignore_memory_t {
80 simgrid::mc::MessageType type;
85 struct s_mc_message_stack_region_t {
86 simgrid::mc::MessageType type;
87 s_stack_region_t stack_region;
90 struct s_mc_message_register_symbol_t {
91 simgrid::mc::MessageType type;
92 std::array<char, 128> name;
93 int (*callback)(void*);
97 /* Server -> client */
98 struct s_mc_message_simcall_execute_t {
99 simgrid::mc::MessageType type;
101 int times_considered_;
103 struct s_mc_message_simcall_execute_answer_t {
104 simgrid::mc::MessageType type;
105 std::array<char, SIMCALL_SERIALIZATION_BUFFER_SIZE> buffer;
108 struct s_mc_message_restore_t {
109 simgrid::mc::MessageType type;
113 struct s_mc_message_actor_enabled_t {
114 simgrid::mc::MessageType type;
115 aid_t aid; // actor ID
118 #endif // __cplusplus