X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/37628abb1a6de84ea9ddee484632b6a9d6245c96..HEAD:/src/mc/Session.cpp diff --git a/src/mc/Session.cpp b/src/mc/Session.cpp deleted file mode 100644 index e600b30222..0000000000 --- a/src/mc/Session.cpp +++ /dev/null @@ -1,204 +0,0 @@ -/* Copyright (c) 2015-2016. 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 -#include - -#include - -#include -#include -#include -#include -#include - -#include "src/mc/Session.hpp" -#include "src/mc/mc_state.h" -#include "src/mc/mc_private.h" - -XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_Session, mc, "Model-checker session"); - -namespace simgrid { -namespace mc { - -static void setup_child_environment(int socket) -{ -#ifdef __linux__ - // Make sure we do not outlive our parent: - sigset_t mask; - sigemptyset (&mask); - if (sigprocmask(SIG_SETMASK, &mask, nullptr) < 0) - throw simgrid::xbt::errno_error(errno, "Could not unblock signals"); - if (prctl(PR_SET_PDEATHSIG, SIGHUP) != 0) - throw simgrid::xbt::errno_error(errno, "Could not PR_SET_PDEATHSIG"); -#endif - - int res; - - // Remove CLOEXEC in order to pass the socket to the exec-ed program: - int fdflags = fcntl(socket, F_GETFD, 0); - if (fdflags == -1 || fcntl(socket, F_SETFD, fdflags & ~FD_CLOEXEC) == -1) - throw simgrid::xbt::errno_error(errno, "Could not remove CLOEXEC for socket"); - - // Set environment: - setenv(MC_ENV_VARIABLE, "1", 1); - - // Disable lazy relocation in the model-checked process. - // We don't want the model-checked process to modify its .got.plt during - // snapshot. - setenv("LC_BIND_NOW", "1", 1); - - char buffer[64]; - res = std::snprintf(buffer, sizeof(buffer), "%i", socket); - if ((size_t) res >= sizeof(buffer) || res == -1) - std::abort(); - setenv(MC_ENV_SOCKET_FD, buffer, 1); -} - -/** Execute some code in a forked process */ -template -static inline -pid_t do_fork(F code) -{ - pid_t pid = fork(); - if (pid < 0) - throw simgrid::xbt::errno_error(errno, "Could not fork model-checked process"); - if (pid != 0) - return pid; - - // Child-process: - try { - code(); - _exit(EXIT_SUCCESS); - } - catch(...) { - // The callback should catch exceptions: - std::terminate(); - } -} - -Session::Session(pid_t pid, int socket) -{ - std::unique_ptr process(new simgrid::mc::Process(pid, socket)); - // TODO, automatic detection of the config from the process - process->privatized( - xbt_cfg_get_boolean("smpi/privatize_global_variables")); - modelChecker_ = std::unique_ptr( - new simgrid::mc::ModelChecker(std::move(process))); - xbt_assert(mc_model_checker == nullptr); - mc_model_checker = modelChecker_.get(); - mc_model_checker->start(); -} - -Session::~Session() -{ - this->close(); -} - -void Session::execute(Transition const& transition) -{ - modelChecker_->handle_simcall(transition); - modelChecker_->wait_for_requests(); -} - -void Session::logState() -{ - if(_sg_mc_comms_determinism) { - if (!simgrid::mc::initial_global_state->recv_deterministic && - simgrid::mc::initial_global_state->send_deterministic){ - XBT_INFO("******************************************************"); - XBT_INFO("**** Only-send-deterministic communication pattern ****"); - XBT_INFO("******************************************************"); - XBT_INFO("%s", simgrid::mc::initial_global_state->recv_diff); - }else if(!simgrid::mc::initial_global_state->send_deterministic && - simgrid::mc::initial_global_state->recv_deterministic) { - XBT_INFO("******************************************************"); - XBT_INFO("**** Only-recv-deterministic communication pattern ****"); - XBT_INFO("******************************************************"); - XBT_INFO("%s", simgrid::mc::initial_global_state->send_diff); - } - } - - if (mc_stats->expanded_pairs == 0) { - XBT_INFO("Expanded states = %lu", mc_stats->expanded_states); - XBT_INFO("Visited states = %lu", mc_stats->visited_states); - } else { - XBT_INFO("Expanded pairs = %lu", mc_stats->expanded_pairs); - XBT_INFO("Visited pairs = %lu", mc_stats->visited_pairs); - } - XBT_INFO("Executed transitions = %lu", mc_stats->executed_transitions); - if ((_sg_mc_dot_output_file != nullptr) && (_sg_mc_dot_output_file[0] != '\0')) { - fprintf(dot_output, "}\n"); - fclose(dot_output); - } - if (simgrid::mc::initial_global_state != nullptr - && (_sg_mc_comms_determinism || _sg_mc_send_determinism)) { - XBT_INFO("Send-deterministic : %s", - !simgrid::mc::initial_global_state->send_deterministic ? "No" : "Yes"); - if (_sg_mc_comms_determinism) - XBT_INFO("Recv-deterministic : %s", - !simgrid::mc::initial_global_state->recv_deterministic ? "No" : "Yes"); - } - if (getenv("SIMGRID_MC_SYSTEM_STATISTICS")){ - int ret=system("free"); - if(ret!=0)XBT_WARN("system call did not return 0, but %d",ret); - } -} - -// static -Session* Session::fork(std::function code) -{ - // Create a AF_LOCAL socketpair used for exchanging messages - // bewteen the model-checker process (ourselves) and the model-checked - // process: - int res; - int sockets[2]; - res = socketpair(AF_LOCAL, SOCK_DGRAM | SOCK_CLOEXEC, 0, sockets); - if (res == -1) - throw simgrid::xbt::errno_error(errno, "Could not create socketpair"); - - pid_t pid = do_fork([&] { - ::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([&] { - execv(path, argv); - }); -} - -// static -Session* Session::spawnvp(const char *path, char *const argv[]) -{ - return Session::fork([&] { - execvp(path, argv); - }); -} - -void Session::close() -{ - if (modelChecker_) { - modelChecker_->shutdown(); - modelChecker_ = nullptr; - mc_model_checker = nullptr; - } -} - -simgrid::mc::Session* session; - -} -}