X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/2807fde4fd1f59c230d69a934634c5dfb77905f2..7f5e78a43b4bed7bae8304ad12de6e2e555b34db:/src/mc/Session.cpp

diff --git a/src/mc/Session.cpp b/src/mc/Session.cpp
index a01cf122ce..4d73338e5f 100644
--- a/src/mc/Session.cpp
+++ b/src/mc/Session.cpp
@@ -1,29 +1,22 @@
-/* Copyright (c) 2015-2017. The SimGrid Team.
- * All rights reserved.                                                     */
+/* Copyright (c) 2015-2019. 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. */
 
-#include <csignal>
-#include <fcntl.h>
-
-#include <functional>
-
-#include "xbt/log.h"
-#include "xbt/system_error.hpp"
-#include <mc/mc.h>
-#include <simgrid/modelchecker.h>
-#include <simgrid/sg_config.h>
-
 #include "src/mc/Session.hpp"
 #include "src/mc/checker/Checker.hpp"
+#include "src/mc/mc_config.hpp"
 #include "src/mc/mc_private.hpp"
 #include "src/mc/mc_state.hpp"
+#include "xbt/log.h"
+#include "xbt/system_error.hpp"
 
-#include "src/smpi/include/private.hpp"
+#include <fcntl.h>
+#ifdef __linux__
+#include <sys/prctl.h>
+#endif
 
 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_Session, mc, "Model-checker session");
-extern std::string _sg_mc_dot_output_file;
 
 namespace simgrid {
 namespace mc {
@@ -84,15 +77,37 @@ pid_t do_fork(F code)
   }
 }
 
-Session::Session(pid_t pid, int socket)
+Session::Session(const std::function<void()>& code)
 {
-  std::unique_ptr<simgrid::mc::RemoteClient> process(new simgrid::mc::RemoteClient(pid, socket));
-  // TODO, automatic detection of the config from the process
-  process->privatized(smpi_privatize_global_variables != SMPI_PRIVATIZE_NONE);
-  modelChecker_ = std::unique_ptr<ModelChecker>(
-    new simgrid::mc::ModelChecker(std::move(process)));
+#if HAVE_SMPI
+  xbt_assert(smpi_privatize_global_variables != SmpiPrivStrategies::MMAP,
+             "Please use the dlopen privatization schema when model-checking SMPI code");
+#endif
+
+  // Create a AF_LOCAL socketpair used for exchanging messages
+  // between the model-checker process (ourselves) and the model-checked
+  // process:
+  int res;
+  int sockets[2];
+  res = socketpair(AF_LOCAL, SOCK_SEQPACKET | SOCK_CLOEXEC, 0, sockets);
+  if (res == -1)
+    throw simgrid::xbt::errno_error("Could not create socketpair");
+
+  pid_t pid = do_fork([sockets, &code] {
+    ::close(sockets[1]);
+    setup_child_environment(sockets[0]);
+    code();
+    xbt_die("The model-checked process failed to exec()");
+  });
+
+  // Parent (model-checker):
+  ::close(sockets[0]);
+
+  std::unique_ptr<simgrid::mc::RemoteClient> process(new simgrid::mc::RemoteClient(pid, sockets[1]));
+  model_checker_.reset(new simgrid::mc::ModelChecker(std::move(process)));
+
   xbt_assert(mc_model_checker == nullptr);
-  mc_model_checker = modelChecker_.get();
+  mc_model_checker = model_checker_.get();
   mc_model_checker->start();
 }
 
@@ -103,27 +118,27 @@ Session::~Session()
 
 void Session::initialize()
 {
-  xbt_assert(initialSnapshot_ == nullptr);
+  xbt_assert(initial_snapshot_ == nullptr);
   mc_model_checker->wait_for_requests();
-  initialSnapshot_ = simgrid::mc::take_snapshot(0);
+  initial_snapshot_ = std::make_shared<simgrid::mc::Snapshot>(0);
 }
 
 void Session::execute(Transition const& transition)
 {
-  modelChecker_->handle_simcall(transition);
-  modelChecker_->wait_for_requests();
+  model_checker_->handle_simcall(transition);
+  model_checker_->wait_for_requests();
 }
 
-void Session::restoreInitialState()
+void Session::restore_initial_state()
 {
-  simgrid::mc::restore_snapshot(this->initialSnapshot_);
+  this->initial_snapshot_->restore(&mc_model_checker->process());
 }
 
-void Session::logState()
+void Session::log_state()
 {
-  mc_model_checker->getChecker()->logState();
+  mc_model_checker->getChecker()->log_state();
 
-  if (not _sg_mc_dot_output_file.empty()) {
+  if (not _sg_mc_dot_output_file.get().empty()) {
     fprintf(dot_output, "}\n");
     fclose(dot_output);
   }
@@ -133,53 +148,12 @@ void Session::logState()
   }
 }
 
-// static
-Session* Session::fork(std::function<void()> code)
-{
-  // Create a AF_LOCAL socketpair used for exchanging messages
-  // between the model-checker process (ourselves) and the model-checked
-  // process:
-  int res;
-  int sockets[2];
-  res = socketpair(AF_LOCAL, SOCK_SEQPACKET | SOCK_CLOEXEC, 0, sockets);
-  if (res == -1)
-    throw simgrid::xbt::errno_error("Could not create socketpair");
-
-  pid_t pid = do_fork([sockets, &code] {
-    ::close(sockets[1]);
-    setup_child_environment(sockets[0]);
-    code();
-    xbt_die("The model-checked process failed to exec()");
-  });
-
-  // Parent (model-checker):
-  ::close(sockets[0]);
-
-  return new Session(pid, sockets[1]);
-}
-
-// static
-Session* Session::spawnv(const char *path, char *const argv[])
-{
-  return Session::fork([path, argv] {
-    execv(path, argv);
-  });
-}
-
-// static
-Session* Session::spawnvp(const char *file, char *const argv[])
-{
-  return Session::fork([file, argv] {
-    execvp(file, argv);
-  });
-}
-
 void Session::close()
 {
-  initialSnapshot_ = nullptr;
-  if (modelChecker_) {
-    modelChecker_->shutdown();
-    modelChecker_ = nullptr;
+  initial_snapshot_ = nullptr;
+  if (model_checker_) {
+    model_checker_->shutdown();
+    model_checker_   = nullptr;
     mc_model_checker = nullptr;
   }
 }