if (instance_)
return instance_.get();
- simgrid::mc::cfg_do_model_check = true;
+ simgrid::mc::model_checking_mode = ModelCheckingMode::APP_SIDE;
setvbuf(stdout, nullptr, _IOLBF, 0);
instance_ = std::make_unique<simgrid::mc::AppSide>(fd);
// Wait for the model-checker:
- errno = 0;
+ if (getenv("MC_NEED_PTRACE") != nullptr) {
+ errno = 0;
#if defined __linux__
- ptrace(PTRACE_TRACEME, 0, nullptr, nullptr);
+ ptrace(PTRACE_TRACEME, 0, nullptr, nullptr);
#elif defined BSD
- ptrace(PT_TRACE_ME, 0, nullptr, 0);
+ ptrace(PT_TRACE_ME, 0, nullptr, 0);
#else
-#error "no ptrace equivalent coded for this platform"
+ xbt_die("no ptrace equivalent coded for this platform, please don't use the liveness checker here.");
#endif
- xbt_assert(errno == 0 && raise(SIGSTOP) == 0, "Could not wait for the model-checker (errno = %d: %s)", errno,
- strerror(errno));
- s_mc_message_initial_addresses_t message = {};
- message.type = MessageType::INITIAL_ADDRESSES;
- message.mmalloc_default_mdp = mmalloc_get_current_heap();
- xbt_assert(instance_->channel_.send(message) == 0, "Could not send the initial message with addresses.");
+ xbt_assert(errno == 0 && raise(SIGSTOP) == 0, "Could not wait for the model-checker (errno = %d: %s)", errno,
+ strerror(errno));
+ }
instance_->handle_messages();
return instance_.get();
if (terminate_asap)
::_Exit(0);
}
+void AppSide::handle_need_meminfo()
+{
+ this->need_memory_info_ = true;
+ s_mc_message_need_meminfo_reply_t answer = {};
+ answer.type = MessageType::NEED_MEMINFO_REPLY;
+ answer.mmalloc_default_mdp = mmalloc_get_current_heap();
+ xbt_assert(channel_.send(answer) == 0, "Could not send response to the request for meminfo.");
+}
void AppSide::handle_actors_status() const
{
auto const& actor_list = kernel::EngineImpl::get_instance()->get_actor_list();
- const int num_actors = actor_list.size();
- XBT_DEBUG("Serialize the actors to answer ACTORS_STATUS from the checker. %d actors to go.", num_actors);
-
- std::vector<s_mc_message_actors_status_one_t> status(num_actors);
- int i = 0;
- int total_transitions = 0;
-
- for (auto const& [aid, actor] : actor_list) {
- status[i].aid = aid;
- status[i].enabled = mc::actor_is_enabled(actor);
- status[i].max_considered = actor->simcall_.observer_->get_max_consider();
- status[i].n_transitions = mc::actor_is_enabled(actor) ? status[i].max_considered : 0;
- total_transitions += status[i].n_transitions;
- i++;
- }
+ XBT_DEBUG("Serialize the actors to answer ACTORS_STATUS from the checker. %zu actors to go.", actor_list.size());
+
+ std::vector<s_mc_message_actors_status_one_t> status;
+ for (auto const& [aid, actor] : actor_list)
+ status.emplace_back(s_mc_message_actors_status_one_t{aid, mc::actor_is_enabled(actor),
+ actor->simcall_.observer_->get_max_consider()});
struct s_mc_message_actors_status_answer_t answer = {};
answer.type = MessageType::ACTORS_STATUS_REPLY;
- answer.count = num_actors;
- answer.transition_count = total_transitions;
+ answer.count = static_cast<int>(status.size());
xbt_assert(channel_.send(answer) == 0, "Could not send ACTORS_STATUS_REPLY msg");
if (answer.count > 0) {
}
// Serialize each transition to describe what each actor is doing
- if (total_transitions > 0) {
- std::vector<s_mc_message_simcall_probe_one_t> probes(total_transitions);
- auto probes_iter = probes.begin();
-
- for (const auto& actor_status : status) {
- if (not actor_status.enabled)
- continue;
-
- const auto& actor = actor_list.at(actor_status.aid);
- const int max_considered = actor_status.max_considered;
-
- for (int times_considered = 0; times_considered < max_considered; times_considered++, probes_iter++) {
- std::stringstream stream;
- s_mc_message_simcall_probe_one_t& probe = *probes_iter;
-
- if (actor->simcall_.observer_ != nullptr) {
- actor->simcall_.observer_->prepare(times_considered);
- actor->simcall_.observer_->serialize(stream);
- } else {
- stream << (short)mc::Transition::Type::UNKNOWN;
- }
-
- std::string str = stream.str();
- xbt_assert(str.size() + 1 <= probe.buffer.size(),
- "The serialized transition is too large for the buffer. Please fix the code.");
- strncpy(probe.buffer.data(), str.c_str(), probe.buffer.size() - 1);
- probe.buffer.back() = '\0';
+ XBT_DEBUG("Deliver ACTOR_TRANSITION_PROBE payload");
+ for (const auto& actor_status : status) {
+ if (not actor_status.enabled)
+ continue;
+
+ const auto& actor = actor_list.at(actor_status.aid);
+ const int max_considered = actor_status.max_considered;
+
+ for (int times_considered = 0; times_considered < max_considered; times_considered++) {
+ std::stringstream stream;
+ s_mc_message_simcall_probe_one_t probe;
+
+ if (actor->simcall_.observer_ != nullptr) {
+ actor->simcall_.observer_->prepare(times_considered);
+ actor->simcall_.observer_->serialize(stream);
+ } else {
+ stream << (short)mc::Transition::Type::UNKNOWN;
}
- // NOTE: We do NOT need to reset `times_considered` for each actor's
- // simcall observer here to the "original" value (i.e. the value BEFORE
- // multiple prepare() calls were made for serialization purposes) since
- // each SIMCALL_EXECUTE provides a `times_considered` to be used to prepare
- // the transition before execution.
- }
- XBT_DEBUG("Deliver ACTOR_TRANSITION_PROBE payload");
- for (const auto& probe : probes)
+ std::string str = stream.str();
+ xbt_assert(str.size() + 1 <= probe.buffer.size(),
+ "The serialized transition is too large for the buffer. Please fix the code.");
+ strncpy(probe.buffer.data(), str.c_str(), probe.buffer.size() - 1);
+ probe.buffer.back() = '\0';
+
xbt_assert(channel_.send(probe) == 0, "Could not send ACTOR_TRANSITION_PROBE payload");
+ }
+ // NOTE: We do NOT need to reset `times_considered` for each actor's
+ // simcall observer here to the "original" value (i.e. the value BEFORE
+ // multiple prepare() calls were made for serialization purposes) since
+ // each SIMCALL_EXECUTE provides a `times_considered` to be used to prepare
+ // the transition before execution.
}
}
void AppSide::handle_actors_maxpid() const
xbt_assert(received_size == sizeof(_type_), "Unexpected size for " _name_ " (%zd != %zu)", received_size, \
sizeof(_type_))
-void AppSide::handle_messages() const
+void AppSide::handle_messages()
{
while (true) { // Until we get a CONTINUE message
XBT_DEBUG("Waiting messages from model-checker");
std::array<char, MC_MESSAGE_LENGTH> message_buffer;
ssize_t received_size = channel_.receive(message_buffer.data(), message_buffer.size());
+ if (received_size == 0) {
+ XBT_DEBUG("Socket closed on the Checker side, bailing out.");
+ ::_Exit(0); // Nobody's listening to that process anymore => exit as quickly as possible.
+ }
xbt_assert(received_size >= 0, "Could not receive commands from the model-checker");
xbt_assert(static_cast<size_t>(received_size) >= sizeof(s_mc_message_t), "Cannot handle short message (size=%zd)",
received_size);
handle_finalize((s_mc_message_int_t*)message_buffer.data());
break;
+ case MessageType::NEED_MEMINFO:
+ assert_msg_size("NEED_MEMINFO", s_mc_message_t);
+ handle_need_meminfo();
+ break;
+
case MessageType::ACTORS_STATUS:
assert_msg_size("ACTORS_STATUS", s_mc_message_t);
handle_actors_status();
}
}
-void AppSide::main_loop() const
+void AppSide::main_loop()
{
simgrid::mc::processes_time.resize(simgrid::kernel::actor::ActorImpl::get_maxpid());
MC_ignore_heap(simgrid::mc::processes_time.data(),
}
}
-void AppSide::report_assertion_failure() const
+void AppSide::report_assertion_failure()
{
xbt_assert(channel_.send(MessageType::ASSERTION_FAILED) == 0, "Could not send assertion to model-checker");
this->handle_messages();
void AppSide::ignore_memory(void* addr, std::size_t size) const
{
- if (not MC_is_active())
+ if (not MC_is_active() || not need_memory_info_)
return;
s_mc_message_ignore_memory_t message = {};
void AppSide::ignore_heap(void* address, std::size_t size) const
{
- if (not MC_is_active())
+ if (not MC_is_active() || not need_memory_info_)
return;
const s_xbt_mheap_t* heap = mmalloc_get_current_heap();
void AppSide::unignore_heap(void* address, std::size_t size) const
{
- if (not MC_is_active())
+ if (not MC_is_active() || not need_memory_info_)
return;
s_mc_message_ignore_memory_t message = {};
void AppSide::declare_symbol(const char* name, int* value) const
{
- if (not MC_is_active())
+ if (not MC_is_active() || not need_memory_info_) {
+ XBT_CRITICAL("Ignore AppSide::declare_symbol(%s)", name);
return;
+ }
s_mc_message_register_symbol_t message = {};
message.type = MessageType::REGISTER_SYMBOL;
*/
void AppSide::declare_stack(void* stack, size_t size, ucontext_t* context) const
{
- if (not MC_is_active())
+ if (not MC_is_active() || not need_memory_info_)
return;
const s_xbt_mheap_t* heap = mmalloc_get_current_heap();
