#include "src/mc/checker/SafetyChecker.hpp"
#include "src/mc/Session.hpp"
#include "src/mc/VisitedState.hpp"
-#include "src/mc/api/Transition.hpp"
#include "src/mc/mc_config.hpp"
#include "src/mc/mc_exit.hpp"
#include "src/mc/mc_private.hpp"
#include "src/mc/mc_record.hpp"
+#include "src/mc/transition/Transition.hpp"
#include "src/xbt/mmalloc/mmprivate.h"
#include "xbt/log.h"
namespace simgrid {
namespace mc {
+xbt::signal<void()> SafetyChecker::on_exploration_start_signal;
+xbt::signal<void()> SafetyChecker::on_backtracking_signal;
+
+xbt::signal<void(State*)> SafetyChecker::on_state_creation_signal;
+
+xbt::signal<void(State*)> SafetyChecker::on_restore_system_state_signal;
+xbt::signal<void()> SafetyChecker::on_restore_initial_state_signal;
+xbt::signal<void(Transition*)> SafetyChecker::on_transition_replay_signal;
+xbt::signal<void(Transition*)> SafetyChecker::on_transition_execute_signal;
+
+xbt::signal<void()> SafetyChecker::on_log_state_signal;
+
void SafetyChecker::check_non_termination(const State* current_state)
{
for (auto state = stack_.rbegin(); state != stack_.rend(); ++state)
void SafetyChecker::log_state() // override
{
- XBT_INFO("Expanded states = %ld", State::get_expanded_states());
- XBT_INFO("Visited states = %lu", api::get().mc_get_visited_states());
- XBT_INFO("Executed transitions = %lu", Transition::get_executed_transitions());
+ on_log_state_signal();
+ XBT_INFO("DFS exploration ended. %ld unique states visited; %ld backtracks (%lu transition replays, %lu states "
+ "visited overall)",
+ State::get_expanded_states(), backtrack_count_, api::get().mc_get_visited_states(),
+ Transition::get_replayed_transitions());
}
void SafetyChecker::run()
{
+ on_exploration_start_signal();
/* This function runs the DFS algorithm the state space.
* We do so iteratively instead of recursively, dealing with the call stack manually.
* This allows one to explore the call stack at will. */
int next = state->next_transition();
if (next < 0) { // If there is no more transition in the current state, backtrack.
-
XBT_DEBUG("There remains %zu actors, but none to interleave (depth %zu).",
mc_model_checker->get_remote_process().actors().size(), stack_.size() + 1);
continue;
}
- /* Actually answer the request: let execute the selected request (MCed does one step) */
+ /* Actually answer the request: let's execute the selected request (MCed does one step) */
state->execute_next(next);
+ on_transition_execute_signal(state->get_transition());
// If there are processes to interleave and the maximum depth has not been
// reached then perform one step of the exploration algorithm.
- XBT_DEBUG("Execute: %s", state->get_transition()->to_cstring());
+ XBT_DEBUG("Execute: %s", state->get_transition()->to_string().c_str());
std::string req_str;
if (dot_output != nullptr)
- req_str =
- api::get().request_get_dot_output(state->get_transition()->aid_, state->get_transition()->times_considered_);
+ req_str = api::get().request_get_dot_output(state->get_transition());
/* Create the new expanded state (copy the state of MCed into our MCer data) */
- auto next_state = std::make_unique<State>();
+ auto next_state = std::make_unique<State>();
+ on_state_creation_signal(next_state.get());
if (_sg_mc_termination)
this->check_non_termination(next_state.get());
stack_.push_back(std::move(next_state));
}
- XBT_INFO("No property violation found.");
api::get().log_state();
}
void SafetyChecker::backtrack()
{
+ backtrack_count_++;
+ XBT_VERB("Backtracking from %s", get_record_trace().to_string().c_str());
+ on_backtracking_signal();
stack_.pop_back();
api::get().mc_check_deadlock();
for (auto i = stack_.rbegin(); i != stack_.rend(); ++i) {
State* prev_state = i->get();
if (state->get_transition()->aid_ == prev_state->get_transition()->aid_) {
- XBT_DEBUG("Simcall >>%s<< and >>%s<< with same issuer %ld", state->get_transition()->to_cstring(),
- prev_state->get_transition()->to_cstring(), issuer_id);
+ XBT_DEBUG("Simcall >>%s<< and >>%s<< with same issuer %ld", state->get_transition()->to_string().c_str(),
+ prev_state->get_transition()->to_string().c_str(), issuer_id);
break;
} else if (prev_state->get_transition()->depends(state->get_transition())) {
XBT_VERB("Dependent Transitions:");
- XBT_VERB(" %s (state=%ld)", prev_state->get_transition()->to_cstring(), prev_state->num_);
- XBT_VERB(" %s (state=%ld)", state->get_transition()->to_cstring(), state->num_);
+ XBT_VERB(" %s (state=%ld)", prev_state->get_transition()->to_string().c_str(), prev_state->num_);
+ XBT_VERB(" %s (state=%ld)", state->get_transition()->to_string().c_str(), state->num_);
if (not prev_state->actor_states_[issuer_id].is_done())
prev_state->mark_todo(issuer_id);
break;
} else {
XBT_VERB("INDEPENDENT Transitions:");
- XBT_VERB(" %s (state=%ld)", prev_state->get_transition()->to_cstring(), prev_state->num_);
- XBT_VERB(" %s (state=%ld)", state->get_transition()->to_cstring(), state->num_);
+ XBT_VERB(" %s (state=%ld)", prev_state->get_transition()->to_string().c_str(), prev_state->num_);
+ XBT_VERB(" %s (state=%ld)", state->get_transition()->to_string().c_str(), state->num_);
}
}
}
void SafetyChecker::restore_state()
{
- /* Intermediate backtracking */
- const State* last_state = stack_.back().get();
+ /* If asked to rollback on a state that has a snapshot, restore it */
+ State* last_state = stack_.back().get();
if (last_state->system_state_) {
api::get().restore_state(last_state->system_state_);
+ on_restore_system_state_signal(last_state);
return;
}
+ /* if no snapshot, we need to restore the initial state and replay the transitions */
get_session().restore_initial_state();
+ on_restore_initial_state_signal();
/* Traverse the stack from the state at position start and re-execute the transitions */
for (std::unique_ptr<State> const& state : stack_) {
- if (state == stack_.back())
+ if (state == stack_.back()) // If we are arrived on the target state, don't replay the outgoing transition *.
break;
state->get_transition()->replay();
+ on_transition_replay_signal(state->get_transition());
/* Update statistics */
api::get().mc_inc_visited_states();
}
if (_sg_mc_termination)
XBT_INFO("Check non progressive cycles");
else
- XBT_INFO("Check a safety property. Reduction is: %s.",
+ XBT_INFO("Start a DFS exploration. Reduction is: %s.",
(reductionMode_ == ReductionMode::none ? "none"
: (reductionMode_ == ReductionMode::dpor ? "dpor" : "unknown")));
