-/* Copyright (c) 2008-2015. The SimGrid Team.
- * All rights reserved. */
+/* Copyright (c) 2008-2022. 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 <cassert>
-
-#include <poll.h>
-#include <sys/types.h>
-#include <sys/wait.h>
-#include <sys/socket.h>
-#include <sys/signalfd.h>
-#include <sys/ptrace.h>
-
-#include <memory>
-#include <system_error>
-
-#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/ModelChecker.hpp"
-#include "src/mc/PageStore.hpp"
-#include "src/mc/ModelChecker.hpp"
-#include "src/mc/mc_protocol.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/Session.hpp"
+#include "src/mc/api/Transition.hpp"
+#include "src/mc/api/TransitionComm.hpp"
+#include "src/mc/checker/Checker.hpp"
+#include "src/mc/mc_config.hpp"
+#include "src/mc/mc_exit.hpp"
+#include "src/mc/mc_private.hpp"
+#include "src/mc/remote/RemoteProcess.hpp"
+#include "xbt/automaton.hpp"
+#include "xbt/system_error.hpp"
+
+#include <array>
+#include <csignal>
+#include <sys/ptrace.h>
+#include <sys/wait.h>
XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_ModelChecker, mc, "ModelChecker");
-}
-
::simgrid::mc::ModelChecker* mc_model_checker = nullptr;
using simgrid::mc::remote;
-// Hardcoded index for now:
-#define SOCKET_FD_INDEX 0
-#define SIGNAL_FD_INDEX 1
+#ifdef __linux__
+# define WAITPID_CHECKED_FLAGS __WALL
+#else
+# define WAITPID_CHECKED_FLAGS 0
+#endif
namespace simgrid {
namespace mc {
-ModelChecker::ModelChecker(std::unique_ptr<Process> process) :
- hostnames_(xbt_dict_new()),
- page_store_(500),
- process_(std::move(process)),
- parent_snapshot_(nullptr)
+ModelChecker::ModelChecker(std::unique_ptr<RemoteProcess> remote_simulation, int sockfd)
+ : checker_side_(sockfd), remote_process_(std::move(remote_simulation))
{
-
-}
-
-ModelChecker::~ModelChecker()
-{
- xbt_dict_free(&this->hostnames_);
-}
-
-const char* ModelChecker::get_host_name(const char* hostname)
-{
- // Lookup the host name in the dictionary (or create it):
- xbt_dictelm_t elt = xbt_dict_get_elm_or_null(this->hostnames_, hostname);
- if (!elt) {
- xbt_dict_set(this->hostnames_, hostname, nullptr, nullptr);
- elt = xbt_dict_get_elm_or_null(this->hostnames_, hostname);
- assert(elt);
- }
- return elt->key;
}
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 simgrid::xbt::errno_error(errno);
-
- sigset_t full_set;
- sigfillset(&full_set);
-
- // Prepare data for poll:
-
- struct pollfd* socket_pollfd = &fds_[SOCKET_FD_INDEX];
- socket_pollfd->fd = process_->socket();;
- socket_pollfd->events = POLLIN;
- socket_pollfd->revents = 0;
-
- int signal_fd = signalfd(-1, &set, 0);
- if (signal_fd == -1)
- throw simgrid::xbt::errno_error(errno);
-
- struct pollfd* signalfd_pollfd = &fds_[SIGNAL_FD_INDEX];
- signalfd_pollfd->fd = signal_fd;
- signalfd_pollfd->events = POLLIN;
- signalfd_pollfd->revents = 0;
+ checker_side_.start(
+ [](evutil_socket_t sig, short events, void* arg) {
+ auto mc = static_cast<simgrid::mc::ModelChecker*>(arg);
+ if (events == EV_READ) {
+ std::array<char, MC_MESSAGE_LENGTH> buffer;
+ ssize_t size = mc->checker_side_.get_channel().receive(buffer.data(), buffer.size(), false);
+ if (size == -1 && errno != EAGAIN)
+ throw simgrid::xbt::errno_error();
+
+ if (not mc->handle_message(buffer.data(), size))
+ mc->checker_side_.break_loop();
+ } else if (events == EV_SIGNAL) {
+ if (sig == SIGCHLD)
+ mc->handle_waitpid();
+ } else {
+ xbt_die("Unexpected event");
+ }
+ },
+ this);
XBT_DEBUG("Waiting for the model-checked process");
int status;
// The model-checked process SIGSTOP itself to signal it's ready:
- pid_t res = waitpid(pid, &status, __WALL);
- if (res < 0 || !WIFSTOPPED(status) || WSTOPSIG(status) != SIGSTOP)
- xbt_die("Could not wait model-checked process");
-
- process_->init();
+ const pid_t pid = remote_process_->pid();
- /* Initialize statistics */
- mc_stats = xbt_new0(s_mc_stats_t, 1);
- mc_stats->state_size = 1;
+ xbt_assert(waitpid(pid, &status, WAITPID_CHECKED_FLAGS) == pid && WIFSTOPPED(status) && WSTOPSIG(status) == SIGSTOP,
+ "Could not wait model-checked process");
- if ((_sg_mc_dot_output_file != nullptr) && (_sg_mc_dot_output_file[0] != '\0'))
+ if (not _sg_mc_dot_output_file.get().empty())
MC_init_dot_output();
- /* Init parmap */
- //parmap = xbt_parmap_mc_new(xbt_os_get_numcores(), XBT_PARMAP_DEFAULT);
-
setup_ignore();
+#ifdef __linux__
ptrace(PTRACE_SETOPTIONS, pid, nullptr, PTRACE_O_TRACEEXIT);
ptrace(PTRACE_CONT, pid, 0, 0);
+#elif defined BSD
+ ptrace(PT_CONTINUE, pid, (caddr_t)1, 0);
+#else
+# error "no ptrace equivalent coded for this platform"
+#endif
}
-static const std::pair<const char*, const char*> ignored_local_variables[] = {
- std::pair<const char*, const char*>{ "e", "*" },
- std::pair<const char*, const char*>{ "__ex_cleanup", "*" },
- std::pair<const char*, const char*>{ "__ex_mctx_en", "*" },
- std::pair<const char*, const char*>{ "__ex_mctx_me", "*" },
- std::pair<const char*, const char*>{ "__xbt_ex_ctx_ptr", "*" },
- std::pair<const char*, const char*>{ "_log_ev", "*" },
- std::pair<const char*, const char*>{ "_throw_ctx", "*" },
- std::pair<const char*, const char*>{ "ctx", "*" },
-
- std::pair<const char*, const char*>{ "self", "simcall_BODY_mc_snapshot" },
- std::pair<const char*, const char*>{ "next_context", "smx_ctx_sysv_suspend_serial" },
- std::pair<const char*, const char*>{ "i", "smx_ctx_sysv_suspend_serial" },
-
- /* Ignore local variable about time used for tracing */
- std::pair<const char*, const char*>{ "start_time", "*" },
+static constexpr auto ignored_local_variables = {
+ std::make_pair("e", "*"),
+ std::make_pair("_log_ev", "*"),
+
+ /* Ignore local variable about time used for tracing */
+ std::make_pair("start_time", "*"),
};
void ModelChecker::setup_ignore()
{
- Process& process = this->process();
- for (std::pair<const char*, const char*> const& var :
- ignored_local_variables)
+ const RemoteProcess& process = this->get_remote_process();
+ for (auto const& var : ignored_local_variables)
process.ignore_local_variable(var.first, var.second);
/* Static variable used for tracing */
process.ignore_global_variable("counter");
-
- /* SIMIX */
- process.ignore_global_variable("smx_total_comms");
}
void ModelChecker::shutdown()
{
- XBT_DEBUG("Shuting down model-checker");
+ XBT_DEBUG("Shutting down model-checker");
- simgrid::mc::Process* process = &this->process();
- if (process->running()) {
+ RemoteProcess& process = get_remote_process();
+ if (process.running()) {
XBT_DEBUG("Killing process");
- kill(process->pid(), SIGTERM);
- process->terminate();
+ finalize_app(true);
+ kill(process.pid(), SIGKILL);
+ process.terminate();
}
}
-void ModelChecker::resume(simgrid::mc::Process& process)
+void ModelChecker::resume()
{
- int res = process.send_message(MC_MESSAGE_CONTINUE);
+ int res = checker_side_.get_channel().send(MessageType::CONTINUE);
if (res)
- throw simgrid::xbt::errno_error(res);
- process.cache_flags = (mc_process_cache_flags_t) 0;
+ throw xbt::errno_error();
+ remote_process_->clear_cache();
}
-static
-void throw_socket_error(int fd)
+static void MC_report_crash(int status)
{
- int error = 0;
- socklen_t errlen = sizeof(error);
- if (getsockopt(fd, SOL_SOCKET, SO_ERROR, (void *)&error, &errlen) == -1)
- error = errno;
- throw simgrid::xbt::errno_error(errno);
+ 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 (not xbt_log_no_loc)
+ XBT_INFO("%s core dump was generated by the system.", WCOREDUMP(status) ? "A" : "No");
+ XBT_INFO("Counter-example execution trace:");
+ for (auto const& s : mc_model_checker->getChecker()->get_textual_trace())
+ XBT_INFO(" %s", s.c_str());
+ XBT_INFO("Path = %s", mc_model_checker->getChecker()->get_record_trace().to_string().c_str());
+ session_singleton->log_state();
+ if (xbt_log_no_loc) {
+ XBT_INFO("Stack trace not displayed because you passed --log=no_loc");
+ } else {
+ XBT_INFO("Stack trace:");
+ mc_model_checker->get_remote_process().dump_stack();
+ }
}
-bool ModelChecker::handle_message(char* buffer, ssize_t size)
+bool ModelChecker::handle_message(const char* buffer, ssize_t size)
{
s_mc_message_t base_message;
- if (size < (ssize_t) sizeof(base_message))
- xbt_die("Broken message");
+ xbt_assert(size >= (ssize_t)sizeof(base_message), "Broken message");
memcpy(&base_message, buffer, sizeof(base_message));
switch(base_message.type) {
+ case MessageType::INITIAL_ADDRESSES: {
+ s_mc_message_initial_addresses_t message;
+ xbt_assert(size == sizeof(message), "Broken message. Got %d bytes instead of %d.", (int)size, (int)sizeof(message));
+ memcpy(&message, buffer, sizeof(message));
+
+ get_remote_process().init(message.mmalloc_default_mdp, message.maxpid, message.actors, message.dead_actors);
+ break;
+ }
- case MC_MESSAGE_IGNORE_HEAP:
- {
- s_mc_ignore_heap_message_t message;
- if (size != sizeof(message))
- xbt_die("Broken messsage");
+ case MessageType::IGNORE_HEAP: {
+ s_mc_message_ignore_heap_t message;
+ xbt_assert(size == sizeof(message), "Broken message");
memcpy(&message, buffer, sizeof(message));
IgnoredHeapRegion region;
- region.block = message.block;
+ region.block = message.block;
region.fragment = message.fragment;
- region.address = message.address;
- region.size = message.size;
- process().ignore_heap(region);
+ region.address = message.address;
+ region.size = message.size;
+ get_remote_process().ignore_heap(region);
break;
}
- case MC_MESSAGE_UNIGNORE_HEAP:
- {
- s_mc_ignore_memory_message_t message;
- if (size != sizeof(message))
- xbt_die("Broken messsage");
+ case MessageType::UNIGNORE_HEAP: {
+ s_mc_message_ignore_memory_t message;
+ xbt_assert(size == sizeof(message), "Broken message");
memcpy(&message, buffer, sizeof(message));
- process().unignore_heap(
- (void *)(std::uintptr_t) message.addr, message.size);
+ get_remote_process().unignore_heap((void*)(std::uintptr_t)message.addr, message.size);
break;
}
- case MC_MESSAGE_IGNORE_MEMORY:
- {
- s_mc_ignore_memory_message_t message;
- if (size != sizeof(message))
- xbt_die("Broken messsage");
+ case MessageType::IGNORE_MEMORY: {
+ s_mc_message_ignore_memory_t message;
+ xbt_assert(size == sizeof(message), "Broken message");
memcpy(&message, buffer, sizeof(message));
- this->process().ignore_region(message.addr, message.size);
+ this->get_remote_process().ignore_region(message.addr, message.size);
break;
}
- case MC_MESSAGE_STACK_REGION:
- {
- s_mc_stack_region_message_t message;
- if (size != sizeof(message))
- xbt_die("Broken messsage");
+ case MessageType::STACK_REGION: {
+ s_mc_message_stack_region_t message;
+ xbt_assert(size == sizeof(message), "Broken message");
memcpy(&message, buffer, sizeof(message));
- this->process().stack_areas().push_back(message.stack_region);
- }
- break;
+ this->get_remote_process().stack_areas().push_back(message.stack_region);
+ } break;
- case MC_MESSAGE_REGISTER_SYMBOL:
- {
- s_mc_register_symbol_message_t message;
- if (size != sizeof(message))
- xbt_die("Broken message");
+ case MessageType::REGISTER_SYMBOL: {
+ s_mc_message_register_symbol_t message;
+ xbt_assert(size == sizeof(message), "Broken message");
memcpy(&message, buffer, sizeof(message));
- if (message.callback)
- xbt_die("Support for client-side function proposition is not implemented.");
- XBT_DEBUG("Received symbol: %s", message.name);
+ xbt_assert(not message.callback, "Support for client-side function proposition is not implemented.");
+ XBT_DEBUG("Received symbol: %s", message.name.data());
- if (_mc_property_automaton == nullptr)
- _mc_property_automaton = xbt_automaton_new();
+ if (property_automaton == nullptr)
+ property_automaton = xbt_automaton_new();
- simgrid::mc::Process* process = &this->process();
- simgrid::mc::RemotePtr<int> address
- = simgrid::mc::remote((int*) message.data);
- simgrid::xbt::add_proposition(_mc_property_automaton,
- message.name,
- [process, address]() { return process->read(address); }
- );
+ const RemoteProcess* process = &this->get_remote_process();
+ RemotePtr<int> address = remote((int*)message.data);
+ xbt::add_proposition(property_automaton, message.name.data(),
+ [process, address]() { return process->read(address); });
break;
}
- case MC_MESSAGE_WAITING:
- return false;
+ case MessageType::WAITING:
+ return false;
- case MC_MESSAGE_ASSERTION_FAILED:
- MC_report_assertion_error();
- this->exit(SIMGRID_MC_EXIT_SAFETY);
- break;
+ case MessageType::ASSERTION_FAILED:
+ XBT_INFO("**************************");
+ XBT_INFO("*** PROPERTY NOT VALID ***");
+ XBT_INFO("**************************");
+ XBT_INFO("Counter-example execution trace:");
+ for (auto const& s : getChecker()->get_textual_trace())
+ XBT_INFO(" %s", s.c_str());
+ XBT_INFO("Path = %s", getChecker()->get_record_trace().to_string().c_str());
+ session_singleton->log_state();
- default:
- xbt_die("Unexpected message from model-checked application");
+ this->exit(SIMGRID_MC_EXIT_SAFETY);
+ default:
+ xbt_die("Unexpected message from model-checked application");
}
return true;
}
-/** Terminate the model-checker aplication */
+/** Terminate the model-checker application */
void ModelChecker::exit(int status)
{
- // TODO, terminate the model checker politely instead of exiting rudel
- if (process().running())
- kill(process().pid(), SIGKILL);
+ shutdown();
::exit(status);
}
-bool ModelChecker::handle_events()
-{
- char buffer[MC_MESSAGE_LENGTH];
- struct pollfd* socket_pollfd = &fds_[SOCKET_FD_INDEX];
- struct pollfd* signalfd_pollfd = &fds_[SIGNAL_FD_INDEX];
-
- while(poll(fds_, 2, -1) == -1) {
- switch(errno) {
- case EINTR:
- continue;
- default:
- throw simgrid::xbt::errno_error(errno);
- }
- }
-
- if (socket_pollfd->revents) {
- if (socket_pollfd->revents & POLLIN) {
- ssize_t size = MC_receive_message(socket_pollfd->fd, buffer, sizeof(buffer), MSG_DONTWAIT);
- if (size == -1 && errno != EAGAIN)
- throw simgrid::xbt::errno_error(errno);
- return handle_message(buffer, size);
- }
- if (socket_pollfd->revents & POLLERR)
- throw_socket_error(socket_pollfd->fd);
- if (socket_pollfd->revents & POLLHUP)
- xbt_die("Socket hang up?");
- }
-
- if (signalfd_pollfd->revents) {
- if (signalfd_pollfd->revents & POLLIN) {
- this->handle_signals();
- return true;
- }
- if (signalfd_pollfd->revents & POLLERR)
- throw_socket_error(signalfd_pollfd->fd);
- if (signalfd_pollfd->revents & POLLHUP)
- xbt_die("Signalfd hang up?");
- }
-
- return true;
-}
-
-void ModelChecker::loop()
-{
- while (this->process().running())
- this->handle_events();
-}
-
-void ModelChecker::handle_signals()
-{
- struct signalfd_siginfo info;
- struct pollfd* signalfd_pollfd = &fds_[SIGNAL_FD_INDEX];
- while (1) {
- ssize_t size = read(signalfd_pollfd->fd, &info, sizeof(info));
- if (size == -1) {
- if (errno == EINTR)
- continue;
- else
- throw simgrid::xbt::errno_error(errno);
- } else if (size != sizeof(info))
- return throw std::runtime_error(
- "Bad communication with model-checked application");
- else
- break;
- }
- this->on_signal(&info);
-}
-
void ModelChecker::handle_waitpid()
{
XBT_DEBUG("Check for wait event");
if (pid == -1) {
if (errno == ECHILD) {
// No more children:
- if (this->process().running())
- xbt_die("Inconsistent state");
- else
- break;
+ xbt_assert(not this->get_remote_process().running(), "Inconsistent state");
+ break;
} else {
XBT_ERROR("Could not wait for pid");
- throw simgrid::xbt::errno_error(errno);
+ throw simgrid::xbt::errno_error();
}
}
- if (pid == this->process().pid()) {
-
+ if (pid == this->get_remote_process().pid()) {
// From PTRACE_O_TRACEEXIT:
+#ifdef __linux__
if (status>>8 == (SIGTRAP | (PTRACE_EVENT_EXIT<<8))) {
- if (ptrace(PTRACE_GETEVENTMSG, this->process().pid(), 0, &status) == -1)
- xbt_die("Could not get exit status");
+ xbt_assert(ptrace(PTRACE_GETEVENTMSG, remote_process_->pid(), 0, &status) != -1, "Could not get exit status");
if (WIFSIGNALED(status)) {
MC_report_crash(status);
- mc_model_checker->exit(SIMGRID_MC_EXIT_PROGRAM_CRASH);
+ this->get_remote_process().terminate();
+ this->exit(SIMGRID_MC_EXIT_PROGRAM_CRASH);
}
}
+#endif
// 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, this->process().pid(), 0, WSTOPSIG(status)) == -1)
- xbt_die("Could not PTRACE_CONT");
+ errno = 0;
+#ifdef __linux__
+ ptrace(PTRACE_CONT, remote_process_->pid(), 0, WSTOPSIG(status));
+#elif defined BSD
+ ptrace(PT_CONTINUE, remote_process_->pid(), (caddr_t)1, WSTOPSIG(status));
+#endif
+ xbt_assert(errno == 0, "Could not PTRACE_CONT");
}
- else if (WIFEXITED(status) || WIFSIGNALED(status)) {
+ else if (WIFSIGNALED(status)) {
+ MC_report_crash(status);
+ this->get_remote_process().terminate();
+ this->exit(SIMGRID_MC_EXIT_PROGRAM_CRASH);
+ } else if (WIFEXITED(status)) {
XBT_DEBUG("Child process is over");
- this->process().terminate();
+ this->get_remote_process().terminate();
}
}
}
}
-void ModelChecker::on_signal(const struct signalfd_siginfo* info)
+void ModelChecker::wait_for_requests()
{
- switch(info->ssi_signo) {
- case SIGCHLD:
- this->handle_waitpid();
- break;
- default:
- break;
- }
+ this->resume();
+ if (this->get_remote_process().running())
+ checker_side_.dispatch();
}
-void ModelChecker::wait_client(simgrid::mc::Process& process)
+Transition* ModelChecker::handle_simcall(aid_t aid, int times_considered, bool new_transition)
{
- this->resume(process);
- while (this->process().running())
- if (!this->handle_events())
- return;
+ s_mc_message_simcall_execute_t m;
+ memset(&m, 0, sizeof(m));
+ m.type = MessageType::SIMCALL_EXECUTE;
+ m.aid_ = aid;
+ m.times_considered_ = times_considered;
+ checker_side_.get_channel().send(m);
+
+ this->remote_process_->clear_cache();
+ if (this->remote_process_->running())
+ checker_side_.dispatch(); // The app may send messages while processing the transition
+
+ s_mc_message_simcall_execute_answer_t answer;
+ ssize_t s = checker_side_.get_channel().receive(answer);
+ xbt_assert(s != -1, "Could not receive message");
+ xbt_assert(s == sizeof(answer) && answer.type == MessageType::SIMCALL_EXECUTE_ANSWER,
+ "Received unexpected message %s (%i, size=%i) "
+ "expected MessageType::SIMCALL_EXECUTE_ANSWER (%i, size=%i)",
+ to_c_str(answer.type), (int)answer.type, (int)s, (int)MessageType::SIMCALL_EXECUTE_ANSWER,
+ (int)sizeof(answer));
+
+ if (new_transition) {
+ std::stringstream stream(answer.buffer.data());
+ return deserialize_transition(aid, times_considered, stream);
+ } else
+ return nullptr;
}
-
-void ModelChecker::simcall_handle(simgrid::mc::Process& process, unsigned long pid, int value)
+bool ModelChecker::simcall_is_visible(aid_t aid)
{
- s_mc_simcall_handle_message m;
+ xbt_assert(mc_model_checker != nullptr, "This should be called from the checker side");
+
+ s_mc_message_simcall_is_visible_t 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())
- if (!this->handle_events())
- return;
+ m.type = MessageType::SIMCALL_IS_VISIBLE;
+ m.aid = aid;
+ checker_side_.get_channel().send(m);
+
+ s_mc_message_simcall_is_visible_answer_t answer;
+ ssize_t s = checker_side_.get_channel().receive(answer);
+ xbt_assert(s != -1, "Could not receive message");
+ xbt_assert(s == sizeof(answer) && answer.type == MessageType::SIMCALL_IS_VISIBLE_ANSWER,
+ "Received unexpected message %s (%i, size=%i) "
+ "expected MessageType::SIMCALL_IS_VISIBLE_ANSWER (%i, size=%i)",
+ to_c_str(answer.type), (int)answer.type, (int)s, (int)MessageType::SIMCALL_IS_VISIBLE_ANSWER,
+ (int)sizeof(answer));
+
+ XBT_DEBUG("is_visible(%ld) is returning %s", aid, answer.value ? "true" : "false");
+
+ this->remote_process_->clear_cache();
+ return answer.value;
}
+void ModelChecker::finalize_app(bool terminate_asap)
+{
+ s_mc_message_int_t m;
+ memset(&m, 0, sizeof m);
+ m.type = MessageType::FINALIZE;
+ m.value = terminate_asap;
+ xbt_assert(checker_side_.get_channel().send(m) == 0, "Could not ask the app to finalize on need");
+
+ s_mc_message_t answer;
+ xbt_assert(checker_side_.get_channel().receive(answer) != -1, "Could not receive answer to FINALIZE");
}
+
+bool ModelChecker::checkDeadlock()
+{
+ xbt_assert(checker_side_.get_channel().send(MessageType::DEADLOCK_CHECK) == 0, "Could not check deadlock state");
+ s_mc_message_int_t message;
+ ssize_t s = checker_side_.get_channel().receive(message);
+ xbt_assert(s != -1, "Could not receive message");
+ xbt_assert(s == sizeof(message) && message.type == MessageType::DEADLOCK_CHECK_REPLY,
+ "Received unexpected message %s (%i, size=%i) "
+ "expected MessageType::DEADLOCK_CHECK_REPLY (%i, size=%i)",
+ to_c_str(message.type), (int)message.type, (int)s, (int)MessageType::DEADLOCK_CHECK_REPLY,
+ (int)sizeof(message));
+ return message.value != 0;
}
+
+} // namespace mc
+} // namespace simgrid