[mc] Move MC-related out of simix and into mc where it belongs

[simgrid.git] / src / mc / mc_client.cpp

diff --git a/src/mc/mc_client.cpp b/src/mc/mc_client.cpp
index 984a221..12edc6b 100644 (file)
--- a/src/mc/mc_client.cpp
+++ b/src/mc/mc_client.cpp
@@ -4,11 +4,11 @@
 /* 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. */
 
-#include <stdlib.h>
-#include <errno.h>
-#include <error.h>
+#include <cstdlib>
+#include <cerrno>
 
 #include <sys/types.h>
+#include <sys/ptrace.h>
 #include <sys/socket.h>
 
 #include <xbt/log.h>
@@ -21,7 +21,6 @@
 // We won't need those once the separation MCer/MCed is complete:
 #include "mc_mmalloc.h"
 #include "mc_ignore.h"
-#include "mc_model_checker.h"
 #include "mc_private.h" // MC_deadlock_check()
 #include "mc_smx.h"
 
@@ -33,12 +32,18 @@ mc_client_t mc_client;
 
 void MC_client_init(void)
 {
+  if (mc_mode != MC_MODE_NONE)
+    return;
+  if (!getenv(MC_ENV_SOCKET_FD))
+    return;
+  mc_mode = MC_MODE_CLIENT;
+
   if (mc_client) {
     XBT_WARN("MC_client_init called more than once.");
     return;
   }
 
-  char* fd_env = getenv(MC_ENV_SOCKET_FD);
+  char* fd_env = std::getenv(MC_ENV_SOCKET_FD);
   if (!fd_env)
     xbt_die("MC socket not found");
 
@@ -56,12 +61,11 @@ void MC_client_init(void)
   mc_client = xbt_new0(s_mc_client_t, 1);
   mc_client->fd = fd;
   mc_client->active = 1;
-}
 
-void MC_client_hello(void)
-{
-  if (MC_protocol_hello(mc_client->fd) != 0)
-    xbt_die("Could not say hello the MC server");
+  // Waiting for the model-checker:
+  if (ptrace(PTRACE_TRACEME, 0, NULL, NULL) == -1 || raise(SIGSTOP) != 0)
+    xbt_die("Could not wait for the model-checker");
+  MC_client_handle_messages();
 }
 
 void MC_client_send_message(void* message, size_t size)
@@ -120,6 +124,16 @@ void MC_client_handle_messages(void)
       }
       break;
 
+    case MC_MESSAGE_RESTORE:
+      {
+        s_mc_restore_message_t message;
+        if (s != sizeof(message))
+          xbt_die("Unexpected size for SIMCALL_HANDLE");
+        memcpy(&message, message_buffer, sizeof(message));
+        smpi_really_switch_data_segment(message.index);
+      }
+      break;
+
     default:
       xbt_die("%s received unexpected message %s (%i)",
         MC_mode_name(mc_mode),