#include <cstdio>
#include <cstring>
-#include <signal.h>
-#include <poll.h>
+#include <utility>
#include <unistd.h>
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <sys/wait.h>
-#include <sys/prctl.h>
-
#include <xbt/log.h>
#include "simgrid/sg_config.h"
-#include "xbt_modinter.h"
-
-#include "mc_base.h"
-#include "mc_private.h"
-#include "mc_protocol.h"
-#include "mc_server.h"
-#include "mc_safety.h"
-#include "mc_comm_pattern.h"
-#include "mc_liveness.h"
+#include "src/xbt_modinter.h"
+
+#include "src/mc/mc_base.h"
+#include "src/mc/mc_private.h"
+#include "src/mc/mc_protocol.h"
+#include "src/mc/mc_safety.h"
+#include "src/mc/mc_comm_pattern.h"
+#include "src/mc/LivenessChecker.hpp"
+#include "src/mc/mc_exit.h"
+#include "src/mc/Session.hpp"
+#include "src/mc/Checker.hpp"
+#include "src/mc/CommunicationDeterminismChecker.hpp"
+#include "src/mc/SafetyChecker.hpp"
XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_main, mc, "Entry point for simgrid-mc");
-static const bool trace = true;
-
-static int do_child(int socket, char** argv)
-{
- XBT_DEBUG("Inside the child process PID=%i", (int) getpid());
- if (prctl(PR_SET_PDEATHSIG, SIGHUP) != 0) {
- std::perror("simgrid-mc");
- return MC_SERVER_ERROR;
- }
- 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) {
- std::perror("simgrid-mc");
- return MC_SERVER_ERROR;
- }
- if (fcntl(socket, F_SETFD, fdflags & ~FD_CLOEXEC) == -1) {
- std::perror("simgrid-mc");
- return MC_SERVER_ERROR;
- }
-
- XBT_DEBUG("CLOEXEC removed on socket %i", socket);
-
- // Set environment:
- setenv(MC_ENV_VARIABLE, "1", 1);
-
- char buffer[64];
- res = std::snprintf(buffer, sizeof(buffer), "%i", socket);
- if ((size_t) res >= sizeof(buffer) || res == -1)
- return MC_SERVER_ERROR;
- setenv(MC_ENV_SOCKET_FD, buffer, 1);
-
- execvp(argv[1], argv+1);
- std::perror("simgrid-mc");
- return MC_SERVER_ERROR;
-}
-
-static int do_parent(int socket, pid_t child)
-{
- XBT_DEBUG("Inside the parent process");
- if (mc_server)
- xbt_die("MC server already present");
- try {
- mc_mode = MC_MODE_SERVER;
- mc_server = new s_mc_server(child, socket);
- mc_server->start();
- MC_init_pid(child, socket);
- if (_sg_mc_comms_determinism || _sg_mc_send_determinism)
- MC_modelcheck_comm_determinism();
- else if (!_sg_mc_property_file || _sg_mc_property_file[0] == '\0')
- MC_modelcheck_safety();
- else
- MC_modelcheck_liveness();
- mc_server->shutdown();
- mc_server->exit();
- }
- catch(std::exception& e) {
- XBT_ERROR(e.what());
- }
- exit(MC_SERVER_ERROR);
-}
-
-static char** argvdup(int argc, char** argv)
+static inline
+char** argvdup(int argc, char** argv)
{
char** argv_copy = xbt_new(char*, argc+1);
std::memcpy(argv_copy, argv, sizeof(char*) * argc);
- argv_copy[argc] = NULL;
+ argv_copy[argc] = nullptr;
return argv_copy;
}
-int main(int argc, char** argv)
+static
+std::unique_ptr<simgrid::mc::Checker> createChecker(simgrid::mc::Session& session)
{
- // We need to keep the original parameters in order to pass them to the
- // model-checked process:
- int argc_copy = argc;
- char** argv_copy = argvdup(argc, argv);
- xbt_log_init(&argc_copy, argv_copy);
- sg_config_init(&argc_copy, argv_copy);
-
- if (argc < 2)
- xbt_die("Missing arguments.\n");
-
- bool server_mode = true;
- char* env = std::getenv("SIMGRID_MC_MODE");
- if (env) {
- if (std::strcmp(env, "server") == 0)
- server_mode = true;
- else if (std::strcmp(env, "standalone") == 0)
- server_mode = false;
- else
- xbt_die("Unrecognised value for SIMGRID_MC_MODE (server/standalone)");
- }
+ using simgrid::mc::Session;
+ using simgrid::mc::FunctionalChecker;
+
+ std::function<int(Session& session)> code;
+ if (_sg_mc_comms_determinism || _sg_mc_send_determinism)
+ return std::unique_ptr<simgrid::mc::Checker>(
+ new simgrid::mc::CommunicationDeterminismChecker(session));
+ else if (!_sg_mc_property_file || _sg_mc_property_file[0] == '\0')
+ return std::unique_ptr<simgrid::mc::Checker>(
+ new simgrid::mc::SafetyChecker(session));
+ else
+ return std::unique_ptr<simgrid::mc::Checker>(
+ new simgrid::mc::LivenessChecker(session));
+
+ return std::unique_ptr<simgrid::mc::Checker>(
+ new FunctionalChecker(session, std::move(code)));
+}
- if (!server_mode) {
- setenv(MC_ENV_VARIABLE, "1", 1);
- execvp(argv[1], argv+1);
+int main(int argc, char** argv)
+{
+ using simgrid::mc::Session;
- std::perror("simgrid-mc");
- return 127;
- }
+ try {
+ if (argc < 2)
+ xbt_die("Missing arguments.\n");
- // Create a AF_LOCAL socketpair:
- int res;
+ // Currently, we need this before sg_config_init:
+ _sg_do_model_check = 1;
+ mc_mode = MC_MODE_SERVER;
- int sockets[2];
- res = socketpair(AF_LOCAL, SOCK_DGRAM | SOCK_CLOEXEC, 0, sockets);
- if (res == -1) {
- perror("simgrid-mc");
- return MC_SERVER_ERROR;
+ // The initialisation function can touch argv.
+ // We make a copy of argv before modifying it in order to pass the original
+ // value to the model-checked:
+ char** argv_copy = argvdup(argc, argv);
+ xbt_log_init(&argc, argv);
+ sg_config_init(&argc, argv);
+
+ std::unique_ptr<Session> session =
+ std::unique_ptr<Session>(Session::spawnvp(argv_copy[1], argv_copy+1));
+ free(argv_copy);
+
+ simgrid::mc::session = session.get();
+ std::unique_ptr<simgrid::mc::Checker> checker = createChecker(*session);
+ int res = checker->run();
+ session->close();
+ return res;
}
-
- XBT_DEBUG("Created socketpair");
-
- pid_t pid = fork();
- if (pid < 0) {
- perror("simgrid-mc");
- return MC_SERVER_ERROR;
- } else if (pid == 0) {
- close(sockets[1]);
- return do_child(sockets[0], argv);
- } else {
- close(sockets[0]);
- return do_parent(sockets[1], pid);
+ catch(std::exception& e) {
+ XBT_ERROR("Exception: %s", e.what());
+ return SIMGRID_MC_EXIT_ERROR;
+ }
+ catch(...) {
+ XBT_ERROR("Unknown exception");
+ return SIMGRID_MC_EXIT_ERROR;
}
-
- return 0;
}
