-/* Copyright (c) 2015-2016. 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 <fcntl.h>
-#include <signal.h>
-
-#include <functional>
-
-#include <xbt/system_error.hpp>
-#include <simgrid/sg_config.h>
-#include <simgrid/modelchecker.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 <fcntl.h>
+#ifdef __linux__
+#include <sys/prctl.h>
+#endif
XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_Session, mc, "Model-checker session");
// 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");
+ xbt_assert(sigprocmask(SIG_SETMASK, &mask, nullptr) >= 0, "Could not unblock signals");
+ xbt_assert(prctl(PR_SET_PDEATHSIG, SIGHUP) == 0, "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");
+ xbt_assert(fdflags != -1 && fcntl(socket, F_SETFD, fdflags & ~FD_CLOEXEC) != -1,
+ "Could not remove CLOEXEC for socket");
// Set environment:
setenv(MC_ENV_VARIABLE, "1", 1);
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();
+ int res = std::snprintf(buffer, sizeof(buffer), "%i", socket);
+ xbt_assert((size_t)res < sizeof(buffer) && res != -1);
setenv(MC_ENV_SOCKET_FD, buffer, 1);
}
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");
+ xbt_assert(pid >= 0, "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<simgrid::mc::Process> 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<ModelChecker>(
- new simgrid::mc::ModelChecker(std::move(process)));
- xbt_assert(mc_model_checker == nullptr);
- mc_model_checker = modelChecker_.get();
- mc_model_checker->start();
+ code();
+ _exit(EXIT_SUCCESS);
}
-Session::~Session()
+Session::Session(const std::function<void()>& code)
{
- this->close();
-}
+#if HAVE_SMPI
+ xbt_assert(smpi_privatize_global_variables != SmpiPrivStrategies::MMAP,
+ "Please use the dlopen privatization schema when model-checking SMPI code");
+#endif
-// static
-Session* Session::fork(std::function<void(void)> code)
-{
// Create a AF_LOCAL socketpair used for exchanging messages
- // bewteen the model-checker process (ourselves) and the model-checked
+ // between 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);
+ res = socketpair(AF_LOCAL, SOCK_SEQPACKET | SOCK_CLOEXEC, 0, sockets);
if (res == -1)
- throw simgrid::xbt::errno_error(errno, "Could not create socketpair");
+ throw simgrid::xbt::errno_error("Could not create socketpair");
- pid_t pid = do_fork([&] {
+ pid_t pid = do_fork([sockets, &code] {
::close(sockets[1]);
setup_child_environment(sockets[0]);
code();
// Parent (model-checker):
::close(sockets[0]);
- return new Session(pid, sockets[1]);
+ 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 = model_checker_.get();
+ mc_model_checker->start();
}
-// static
-Session* Session::spawnv(const char *path, char *const argv[])
+Session::~Session()
{
- return Session::fork([&] {
- execv(path, argv);
- });
+ this->close();
}
-// static
-Session* Session::spawnvp(const char *path, char *const argv[])
+void Session::initialize()
{
- return Session::fork([&] {
- execvp(path, argv);
- });
+ xbt_assert(initial_snapshot_ == nullptr);
+ mc_model_checker->wait_for_requests();
+ initial_snapshot_ = std::make_shared<simgrid::mc::Snapshot>(0);
+}
+
+void Session::execute(Transition const& transition)
+{
+ model_checker_->handle_simcall(transition);
+ model_checker_->wait_for_requests();
+}
+
+void Session::restore_initial_state()
+{
+ this->initial_snapshot_->restore(&mc_model_checker->process());
+}
+
+void Session::log_state()
+{
+ mc_model_checker->getChecker()->log_state();
+
+ if (not _sg_mc_dot_output_file.get().empty()) {
+ fprintf(dot_output, "}\n");
+ fclose(dot_output);
+ }
+ if (getenv("SIMGRID_MC_SYSTEM_STATISTICS")){
+ int ret=system("free");
+ if(ret!=0)XBT_WARN("system call did not return 0, but %d",ret);
+ }
}
void Session::close()
{
- if (modelChecker_) {
- modelChecker_->shutdown();
- modelChecker_ = nullptr;
+ initial_snapshot_ = nullptr;
+ if (model_checker_) {
+ model_checker_->shutdown();
+ model_checker_ = nullptr;
mc_model_checker = nullptr;
}
}
