X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/0a82e90d4cfdd7e27e1b946d22aff74a5abdda99..af53a6d1fbdda6d8d5523d1284927e8c72e24f91:/src/mc/SafetyChecker.cpp

diff --git a/src/mc/SafetyChecker.cpp b/src/mc/SafetyChecker.cpp
index 4064b6aaf4..e223f5e4e4 100644
--- a/src/mc/SafetyChecker.cpp
+++ b/src/mc/SafetyChecker.cpp
@@ -268,7 +268,7 @@ int SafetyChecker::backtrack()
       XBT_DEBUG("Back-tracking to state %d at depth %zi",
         state->num, stack_.size() + 1);
       stack_.push_back(std::move(state));
-      simgrid::mc::replay(stack_);
+      this->restoreState();
       XBT_DEBUG("Back-tracking to state %d at depth %zi done",
         stack_.back()->num, stack_.size());
       break;
@@ -280,6 +280,31 @@ int SafetyChecker::backtrack()
   return SIMGRID_MC_EXIT_SUCCESS;
 }
 
+void SafetyChecker::restoreState()
+{
+  /* Intermediate backtracking */
+  {
+    simgrid::mc::State* state = stack_.back().get();
+    if (state->system_state) {
+      simgrid::mc::restore_snapshot(state->system_state);
+      return;
+    }
+  }
+
+  /* Restore the initial state */
+  simgrid::mc::session->restoreInitialState();
+
+  /* Traverse the stack from the state at position start and re-execute the transitions */
+  for (std::unique_ptr<simgrid::mc::State> const& state : stack_) {
+    if (state == stack_.back())
+      break;
+      session->execute(state->transition);
+    /* Update statistics */
+    mc_model_checker->visited_states++;
+    mc_model_checker->executed_transitions++;
+  }
+}
+
 void SafetyChecker::init()
 {
   reductionMode_ = simgrid::mc::reduction_mode;