X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/72d32c4e88a57f4786f62fec48a1bfa454adbff9..5f5a10db6fc4552782638abb4817041223e17775:/src/mc/remote/mc_protocol.h

diff --git a/src/mc/remote/mc_protocol.h b/src/mc/remote/mc_protocol.h
index e83a281459..0c41b275ea 100644
--- a/src/mc/remote/mc_protocol.h
+++ b/src/mc/remote/mc_protocol.h
@@ -1,4 +1,4 @@
-/* Copyright (c) 2015-2022. The SimGrid Team. All rights reserved.          */
+/* Copyright (c) 2015-2023. The SimGrid Team. All rights reserved.          */
 
 /* This program is free software; you can redistribute it and/or modify it
  * under the terms of the license (GNU LGPL) which comes with this package. */
@@ -8,39 +8,34 @@
 
 // ***** Environment variables for passing context to the model-checked process
 
-/** Environment variable name used to pass the communication socket.
- *
- * It is set by `simgrid-mc` to enable MC support in the children processes
- */
-#define MC_ENV_SOCKET_FD "SIMGRID_MC_SOCKET_FD"
-
 #ifdef __cplusplus
 
 #include "src/kernel/actor/SimcallObserver.hpp"
 
-#include "mc/datatypes.h"
 #include "simgrid/forward.h" // aid_t
+#include "src/mc/datatypes.h"
+#include <xbt/utility.hpp>
+
 #include <array>
 #include <cstdint>
-#include <xbt/dynar.h>
-#include <xbt/mmalloc.h>
-#include <xbt/utility.hpp>
+#include <sys/un.h>
 
 // ***** Messages
 namespace simgrid::mc {
 
-XBT_DECLARE_ENUM_CLASS(MessageType, NONE, INITIAL_ADDRESSES, CONTINUE, IGNORE_HEAP, UNIGNORE_HEAP, IGNORE_MEMORY,
-                       STACK_REGION, REGISTER_SYMBOL, DEADLOCK_CHECK, DEADLOCK_CHECK_REPLY, WAITING, SIMCALL_EXECUTE,
-                       SIMCALL_EXECUTE_ANSWER, ASSERTION_FAILED, ACTOR_ENABLED, ACTOR_ENABLED_REPLY, FINALIZE);
-
+XBT_DECLARE_ENUM_CLASS(MessageType, NONE, FORK, FORK_REPLY, WAIT_CHILD, WAIT_CHILD_REPLY, CONTINUE, DEADLOCK_CHECK,
+                       DEADLOCK_CHECK_REPLY, WAITING, SIMCALL_EXECUTE, SIMCALL_EXECUTE_REPLY, ASSERTION_FAILED,
+                       ACTORS_STATUS, ACTORS_STATUS_REPLY_COUNT, ACTORS_STATUS_REPLY_SIMCALL,
+                       ACTORS_STATUS_REPLY_TRANSITION, ACTORS_MAXPID, ACTORS_MAXPID_REPLY, FINALIZE, FINALIZE_REPLY);
 } // namespace simgrid::mc
 
-constexpr unsigned MC_MESSAGE_LENGTH = 512;
+constexpr unsigned MC_MESSAGE_LENGTH                 = 512;
+constexpr unsigned MC_SOCKET_NAME_LEN                = sizeof(sockaddr_un::sun_path);
 constexpr unsigned SIMCALL_SERIALIZATION_BUFFER_SIZE = 2048;
 
 /** Basic structure for a MC message
  *
- *  The current version of the client/server protocol sends C structures over `AF_LOCAL`
+ *  The current version of the client/server protocol sends C structures over `AF_UNIX`
  *  `SOCK_SEQPACKET` sockets. This means that the protocol is ABI/architecture specific:
  *  we currently can't model-check a x86 process from a x86_64 process.
  *
@@ -59,40 +54,13 @@ struct s_mc_message_int_t {
 };
 
 /* Client->Server */
-struct s_mc_message_initial_addresses_t {
-  simgrid::mc::MessageType type;
-  xbt_mheap_t mmalloc_default_mdp;
-  unsigned long* maxpid;
-  xbt_dynar_t actors;
-};
-
-struct s_mc_message_ignore_heap_t {
-  simgrid::mc::MessageType type;
-  int block;
-  int fragment;
-  void* address;
-  size_t size;
-};
-
-struct s_mc_message_ignore_memory_t {
-  simgrid::mc::MessageType type;
-  uint64_t addr;
-  size_t size;
-};
 
-struct s_mc_message_stack_region_t {
-  simgrid::mc::MessageType type;
-  s_stack_region_t stack_region;
-};
-
-struct s_mc_message_register_symbol_t {
+/* Server -> client */
+struct s_mc_message_fork_t {
   simgrid::mc::MessageType type;
-  std::array<char, 128> name;
-  int (*callback)(void*);
-  void* data;
+  std::array<char, MC_SOCKET_NAME_LEN> socket_name;
 };
 
-/* Server -> client */
 struct s_mc_message_simcall_execute_t {
   simgrid::mc::MessageType type;
   aid_t aid_;
@@ -108,9 +76,23 @@ struct s_mc_message_restore_t {
   int index;
 };
 
-struct s_mc_message_actor_enabled_t {
+struct s_mc_message_actors_status_answer_t {
   simgrid::mc::MessageType type;
-  aid_t aid; // actor ID
+  int count;
+};
+struct s_mc_message_actors_status_one_t { // an array of `s_mc_message_actors_status_one_t[count]` is sent right after
+                                          // after a `s_mc_message_actors_status_answer_t`
+  simgrid::mc::MessageType type;
+  aid_t aid;
+  bool enabled;
+  int max_considered;
+};
+
+// Answer from an actor to the question "what are you about to run?"
+struct s_mc_message_simcall_probe_one_t { // a series of `s_mc_message_simcall_probe_one_t`
+                                          // is sent right after `s_mc_message_actors_status_one_t[]`
+  simgrid::mc::MessageType type;
+  std::array<char, SIMCALL_SERIALIZATION_BUFFER_SIZE> buffer;
 };
 
 #endif // __cplusplus