+ModelChecker::ModelChecker(std::unique_ptr<RemoteClient> process)
+ : base_(nullptr)
+ , socket_event_(nullptr)
+ , signal_event_(nullptr)
+ , page_store_(500)
+ , process_(std::move(process))
+{
+
+}
+
+ModelChecker::~ModelChecker() {
+ if (socket_event_ != nullptr)
+ event_free(socket_event_);
+ if (signal_event_ != nullptr)
+ event_free(signal_event_);
+ if (base_ != nullptr)
+ event_base_free(base_);
+}
+
+void ModelChecker::start()
+{
+ base_ = event_base_new();
+ event_callback_fn event_callback = [](evutil_socket_t fd, short events, void *arg)
+ {
+ ((ModelChecker *)arg)->handle_events(fd, events);
+ };
+ socket_event_ = event_new(base_, process_->get_channel().get_socket(), EV_READ | EV_PERSIST, event_callback, this);
+ event_add(socket_event_, NULL);
+ signal_event_ = event_new(base_,
+ SIGCHLD,
+ EV_SIGNAL|EV_PERSIST,
+ event_callback, this);
+ event_add(signal_event_, NULL);
+
+ XBT_DEBUG("Waiting for the model-checked process");
+ int status;
+
+ // The model-checked process SIGSTOP itself to signal it's ready:
+ const pid_t pid = process_->pid();
+
+ pid_t res = waitpid(pid, &status, WAITPID_CHECKED_FLAGS);
+ if (res < 0 || not WIFSTOPPED(status) || WSTOPSIG(status) != SIGSTOP)
+ xbt_die("Could not wait model-checked process");
+
+ process_->init();
+
+ if (not _sg_mc_dot_output_file.get().empty())
+ MC_init_dot_output();
+
+ setup_ignore();
+
+#ifdef __linux__
+ ptrace(PTRACE_SETOPTIONS, pid, nullptr, PTRACE_O_TRACEEXIT);
+ ptrace(PTRACE_CONT, pid, 0, 0);
+#elif defined BSD
+ ptrace(PT_CONTINUE, pid, (caddr_t)1, 0);
+#else
+# error "no ptrace equivalent coded for this platform"
+#endif
+}
+
+static const std::pair<const char*, const char*> ignored_local_variables[] = {
+ std::pair<const char*, const char*>{ "e", "*" },
+ std::pair<const char*, const char*>{ "_log_ev", "*" },
+
+ /* Ignore local variable about time used for tracing */
+ std::pair<const char*, const char*>{ "start_time", "*" },
+};
+
+void ModelChecker::setup_ignore()
+{
+ RemoteClient& process = this->process();
+ for (std::pair<const char*, const char*> const& var :
+ ignored_local_variables)
+ process.ignore_local_variable(var.first, var.second);
+
+ /* Static variable used for tracing */
+ process.ignore_global_variable("counter");
+}
+
+void ModelChecker::shutdown()
+{
+ XBT_DEBUG("Shuting down model-checker");
+
+ simgrid::mc::RemoteClient* process = &this->process();
+ if (process->running()) {
+ XBT_DEBUG("Killing process");
+ kill(process->pid(), SIGKILL);
+ process->terminate();
+ }
+}
+
+void ModelChecker::resume(simgrid::mc::RemoteClient& process)
+{
+ int res = process.get_channel().send(MC_MESSAGE_CONTINUE);
+ if (res)
+ throw simgrid::xbt::errno_error();
+ process.clear_cache();
+}
+
+static void MC_report_crash(int status)
+{
+ XBT_INFO("**************************");
+ XBT_INFO("** CRASH IN THE PROGRAM **");
+ XBT_INFO("**************************");
+ if (WIFSIGNALED(status))
+ XBT_INFO("From signal: %s", strsignal(WTERMSIG(status)));
+ else if (WIFEXITED(status))
+ XBT_INFO("From exit: %i", WEXITSTATUS(status));
+ if (not xbt_log_no_loc)
+ XBT_INFO("%s core dump was generated by the system.", WCOREDUMP(status) ? "A" : "No");
+ XBT_INFO("Counter-example execution trace:");
+ for (auto const& s : mc_model_checker->getChecker()->get_textual_trace())
+ XBT_INFO(" %s", s.c_str());
+ simgrid::mc::dumpRecordPath();
+ simgrid::mc::session->log_state();
+ if (xbt_log_no_loc) {
+ XBT_INFO("Stack trace not displayed because you passed --log=no_loc");
+ } else {
+ XBT_INFO("Stack trace:");
+ mc_model_checker->process().dump_stack();
+ }
+}
+
+static void MC_report_assertion_error()
+{
+ XBT_INFO("**************************");
+ XBT_INFO("*** PROPERTY NOT VALID ***");
+ XBT_INFO("**************************");
+ XBT_INFO("Counter-example execution trace:");
+ for (auto const& s : mc_model_checker->getChecker()->get_textual_trace())
+ XBT_INFO(" %s", s.c_str());
+ simgrid::mc::dumpRecordPath();
+ simgrid::mc::session->log_state();
+}
+
+bool ModelChecker::handle_message(char* buffer, ssize_t size)