#include <xbt/log.h>
#include <xbt/automaton.h>
#include <xbt/automaton.hpp>
+#include <xbt/system_error.hpp>
#include "simgrid/sg_config.h"
#include "src/mc/mc_private.h"
#include "src/mc/mc_ignore.h"
#include "src/mc/mc_exit.h"
-#include "src/mc/mc_liveness.h"
-
-extern "C" {
+#include "src/mc/mc_record.h"
+#include "src/mc/Transition.hpp"
+#include "src/mc/Checker.hpp"
XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_ModelChecker, mc, "ModelChecker");
-}
-
::simgrid::mc::ModelChecker* mc_model_checker = nullptr;
using simgrid::mc::remote;
namespace simgrid {
namespace mc {
-ModelChecker::ModelChecker(pid_t pid, int socket) :
- pid_(pid), socket_(socket),
+ModelChecker::ModelChecker(std::unique_ptr<Process> process) :
hostnames_(xbt_dict_new()),
page_store_(500),
+ process_(std::move(process)),
parent_snapshot_(nullptr)
{
return elt->key;
}
-// HACK, for the unit test only
-void ModelChecker::init_process()
-{
- // TODO, avoid direct dependency on sg_cfg
- process_ = std::unique_ptr<Process>(new Process(pid_, socket_));
- process_->privatized(sg_cfg_get_boolean("smpi/privatize_global_variables"));
-}
-
void ModelChecker::start()
{
+ const pid_t pid = process_->pid();
+
// Block SIGCHLD (this will be handled with accept/signalfd):
sigset_t set;
sigemptyset(&set);
sigaddset(&set, SIGCHLD);
if (sigprocmask(SIG_BLOCK, &set, nullptr) == -1)
- throw std::system_error(errno, std::system_category());
+ throw simgrid::xbt::errno_error();
sigset_t full_set;
sigfillset(&full_set);
// Prepare data for poll:
struct pollfd* socket_pollfd = &fds_[SOCKET_FD_INDEX];
- socket_pollfd->fd = socket_;
+ socket_pollfd->fd = process_->getChannel().getSocket();
socket_pollfd->events = POLLIN;
socket_pollfd->revents = 0;
int signal_fd = signalfd(-1, &set, 0);
if (signal_fd == -1)
- throw std::system_error(errno, std::system_category());
+ throw simgrid::xbt::errno_error();
struct pollfd* signalfd_pollfd = &fds_[SIGNAL_FD_INDEX];
signalfd_pollfd->fd = signal_fd;
int status;
// The model-checked process SIGSTOP itself to signal it's ready:
- pid_t res = waitpid(pid_, &status, __WALL);
+ pid_t res = waitpid(pid, &status, __WALL);
if (res < 0 || !WIFSTOPPED(status) || WSTOPSIG(status) != SIGSTOP)
xbt_die("Could not wait model-checked process");
- this->init_process();
-
- /* Initialize statistics */
- mc_stats = xbt_new0(s_mc_stats_t, 1);
- mc_stats->state_size = 1;
+ process_->init();
if ((_sg_mc_dot_output_file != nullptr) && (_sg_mc_dot_output_file[0] != '\0'))
MC_init_dot_output();
- /* Init parmap */
- //parmap = xbt_parmap_mc_new(xbt_os_get_numcores(), XBT_PARMAP_DEFAULT);
-
setup_ignore();
- ptrace(PTRACE_SETOPTIONS, pid_, nullptr, PTRACE_O_TRACEEXIT);
- ptrace(PTRACE_CONT, pid_, 0, 0);
+ ptrace(PTRACE_SETOPTIONS, pid, nullptr, PTRACE_O_TRACEEXIT);
+ ptrace(PTRACE_CONT, pid, 0, 0);
}
static const std::pair<const char*, const char*> ignored_local_variables[] = {
void ModelChecker::resume(simgrid::mc::Process& process)
{
- int res = process.send_message(MC_MESSAGE_CONTINUE);
+ int res = process.getChannel().send(MC_MESSAGE_CONTINUE);
if (res)
- throw std::system_error(res, std::system_category());
- process.cache_flags = (mc_process_cache_flags_t) 0;
+ throw simgrid::xbt::errno_error();
+ process.clear_cache();
}
static
socklen_t errlen = sizeof(error);
if (getsockopt(fd, SOL_SOCKET, SO_ERROR, (void *)&error, &errlen) == -1)
error = errno;
- throw std::system_error(error, std::system_category());
+ throw simgrid::xbt::errno_error();
+}
+
+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 (WCOREDUMP(status))
+ XBT_INFO("A core dump was generated by the system.");
+ else
+ XBT_INFO("No core dump was generated by the system.");
+ XBT_INFO("Counter-example execution trace:");
+ simgrid::mc::dumpRecordPath();
+ for (auto& s : mc_model_checker->getChecker()->getTextualTrace())
+ XBT_INFO("%s", s.c_str());
+ simgrid::mc::session->logState();
+ XBT_INFO("Stack trace:");
+ mc_model_checker->process().dumpStack();
+}
+
+static void MC_report_assertion_error(void)
+{
+ XBT_INFO("**************************");
+ XBT_INFO("*** PROPERTY NOT VALID ***");
+ XBT_INFO("**************************");
+ XBT_INFO("Counter-example execution trace:");
+ simgrid::mc::dumpRecordPath();
+ for (auto& s : mc_model_checker->getChecker()->getTextualTrace())
+ XBT_INFO("%s", s.c_str());
+ simgrid::mc::session->logState();
}
bool ModelChecker::handle_message(char* buffer, ssize_t size)
xbt_die("Support for client-side function proposition is not implemented.");
XBT_DEBUG("Received symbol: %s", message.name);
- if (_mc_property_automaton == nullptr)
- _mc_property_automaton = xbt_automaton_new();
+ if (simgrid::mc::property_automaton == nullptr)
+ simgrid::mc::property_automaton = xbt_automaton_new();
simgrid::mc::Process* process = &this->process();
- simgrid::mc::remote_ptr<int> address
+ simgrid::mc::RemotePtr<int> address
= simgrid::mc::remote((int*) message.data);
- simgrid::xbt::add_proposition(_mc_property_automaton,
+ simgrid::xbt::add_proposition(simgrid::mc::property_automaton,
message.name,
[process, address]() { return process->read(address); }
);
case MC_MESSAGE_ASSERTION_FAILED:
MC_report_assertion_error();
- ::exit(SIMGRID_MC_EXIT_SAFETY);
+ this->exit(SIMGRID_MC_EXIT_SAFETY);
break;
default:
return true;
}
+/** Terminate the model-checker aplication */
+void ModelChecker::exit(int status)
+{
+ // TODO, terminate the model checker politely instead of exiting rudel
+ if (process().running())
+ kill(process().pid(), SIGKILL);
+ ::exit(status);
+}
+
bool ModelChecker::handle_events()
{
char buffer[MC_MESSAGE_LENGTH];
case EINTR:
continue;
default:
- throw std::system_error(errno, std::system_category());
+ throw simgrid::xbt::errno_error();
}
}
if (socket_pollfd->revents) {
if (socket_pollfd->revents & POLLIN) {
- ssize_t size = MC_receive_message(socket_pollfd->fd, buffer, sizeof(buffer), MSG_DONTWAIT);
+ ssize_t size = process_->getChannel().receive(buffer, sizeof(buffer), false);
if (size == -1 && errno != EAGAIN)
- throw std::system_error(errno, std::system_category());
+ throw simgrid::xbt::errno_error();
return handle_message(buffer, size);
}
- if (socket_pollfd->revents & POLLERR) {
+ if (socket_pollfd->revents & POLLERR)
throw_socket_error(socket_pollfd->fd);
- }
if (socket_pollfd->revents & POLLHUP)
xbt_die("Socket hang up?");
}
this->handle_signals();
return true;
}
- if (signalfd_pollfd->revents & POLLERR) {
+ if (signalfd_pollfd->revents & POLLERR)
throw_socket_error(signalfd_pollfd->fd);
- }
if (signalfd_pollfd->revents & POLLHUP)
xbt_die("Signalfd hang up?");
}
if (errno == EINTR)
continue;
else
- throw std::system_error(errno, std::system_category());
+ throw simgrid::xbt::errno_error();
} else if (size != sizeof(info))
return throw std::runtime_error(
"Bad communication with model-checked application");
break;
} else {
XBT_ERROR("Could not wait for pid");
- throw std::system_error(errno, std::system_category());
+ throw simgrid::xbt::errno_error();
}
}
// From PTRACE_O_TRACEEXIT:
if (status>>8 == (SIGTRAP | (PTRACE_EVENT_EXIT<<8))) {
- if (ptrace(PTRACE_GETEVENTMSG, pid_, 0, &status) == -1)
+ if (ptrace(PTRACE_GETEVENTMSG, this->process().pid(), 0, &status) == -1)
xbt_die("Could not get exit status");
if (WIFSIGNALED(status)) {
MC_report_crash(status);
- ::exit(SIMGRID_MC_EXIT_PROGRAM_CRASH);
+ mc_model_checker->exit(SIMGRID_MC_EXIT_PROGRAM_CRASH);
}
}
// We don't care about signals, just reinject them:
if (WIFSTOPPED(status)) {
XBT_DEBUG("Stopped with signal %i", (int) WSTOPSIG(status));
- if (ptrace(PTRACE_CONT, pid_, 0, WSTOPSIG(status)) == -1)
+ if (ptrace(PTRACE_CONT, this->process().pid(), 0, WSTOPSIG(status)) == -1)
xbt_die("Could not PTRACE_CONT");
}
void ModelChecker::wait_client(simgrid::mc::Process& process)
{
this->resume(process);
- while (this->process().running()) {
+ while (this->process().running())
if (!this->handle_events())
return;
- }
}
-void ModelChecker::simcall_handle(simgrid::mc::Process& process, unsigned long pid, int value)
+void ModelChecker::handle_simcall(Transition const& transition)
{
s_mc_simcall_handle_message m;
memset(&m, 0, sizeof(m));
m.type = MC_MESSAGE_SIMCALL_HANDLE;
- m.pid = pid;
- m.value = value;
- process.send_message(m);
- process.cache_flags = (mc_process_cache_flags_t) 0;
- while (process.running()) {
+ m.pid = transition.pid;
+ m.value = transition.argument;
+ this->process_->getChannel().send(m);
+ this->process_->clear_cache();
+ while (this->process_->running())
if (!this->handle_events())
return;
- }
+}
+
+bool ModelChecker::checkDeadlock()
+{
+ int res;
+ if ((res = this->process().getChannel().send(MC_MESSAGE_DEADLOCK_CHECK)))
+ xbt_die("Could not check deadlock state");
+ s_mc_int_message_t message;
+ ssize_t s = mc_model_checker->process().getChannel().receive(message);
+ if (s == -1)
+ xbt_die("Could not receive message");
+ if (s != sizeof(message) || message.type != MC_MESSAGE_DEADLOCK_CHECK_REPLY)
+ xbt_die("%s received unexpected message %s (%i, size=%i) "
+ "expected MC_MESSAGE_DEADLOCK_CHECK_REPLY (%i, size=%i)",
+ MC_mode_name(mc_mode),
+ MC_message_type_name(message.type), (int) message.type, (int) s,
+ (int) MC_MESSAGE_DEADLOCK_CHECK_REPLY, (int) sizeof(message)
+ );
+ return message.value != 0;
}
}
