X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/2a15998fc166600c0a52d616a0d4c09bf873cf83..ea74f5d95928a521a588737e81f1de94eef25d19:/src/mc/checker/SafetyChecker.cpp diff --git a/src/mc/checker/SafetyChecker.cpp b/src/mc/checker/SafetyChecker.cpp index 33d26b8302..b1af40f63f 100644 --- a/src/mc/checker/SafetyChecker.cpp +++ b/src/mc/checker/SafetyChecker.cpp @@ -1,18 +1,8 @@ -/* Copyright (c) 2016-2019. The SimGrid Team. All rights reserved. */ +/* Copyright (c) 2016-2022. 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 -#include - -#include -#include -#include - -#include -#include - #include "src/mc/Session.hpp" #include "src/mc/Transition.hpp" #include "src/mc/VisitedState.hpp" @@ -21,29 +11,38 @@ #include "src/mc/mc_exit.hpp" #include "src/mc/mc_private.hpp" #include "src/mc/mc_record.hpp" -#include "src/mc/mc_request.hpp" -#include "src/mc/mc_smx.hpp" #include "src/xbt/mmalloc/mmprivate.h" +#include "xbt/log.h" +#include "xbt/sysdep.h" + +#include +#include + +#include +#include +#include + +using api = simgrid::mc::Api; XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_safety, mc, "Logging specific to MC safety verification "); namespace simgrid { namespace mc { -void SafetyChecker::check_non_termination(State* current_state) +void SafetyChecker::check_non_termination(const State* current_state) { for (auto state = stack_.rbegin(); state != stack_.rend(); ++state) - if (snapshot_equal((*state)->system_state_.get(), current_state->system_state_.get())) { + if (api::get().snapshot_equal((*state)->system_state_.get(), current_state->system_state_.get())) { XBT_INFO("Non-progressive cycle: state %d -> state %d", (*state)->num_, current_state->num_); XBT_INFO("******************************************"); XBT_INFO("*** NON-PROGRESSIVE CYCLE DETECTED ***"); XBT_INFO("******************************************"); XBT_INFO("Counter-example execution trace:"); - for (auto const& s : mc_model_checker->getChecker()->get_textual_trace()) + for (auto const& s : get_textual_trace()) XBT_INFO(" %s", s.c_str()); - dumpRecordPath(); - session->log_state(); + api::get().dump_record_path(); + api::get().log_state(); throw TerminationError(); } @@ -60,20 +59,16 @@ RecordTrace SafetyChecker::get_record_trace() // override std::vector SafetyChecker::get_textual_trace() // override { std::vector trace; - for (auto const& state : stack_) { - int value = state->transition_.argument_; - smx_simcall_t req = &state->executed_req_; - if (req) - trace.push_back(request_to_string(req, value, RequestType::executed)); - } + for (auto const& state : stack_) + trace.push_back(state->transition_.textual); return trace; } void SafetyChecker::log_state() // override { XBT_INFO("Expanded states = %lu", expanded_states_count_); - XBT_INFO("Visited states = %lu", mc_model_checker->visited_states); - XBT_INFO("Executed transitions = %lu", mc_model_checker->executed_transitions); + XBT_INFO("Visited states = %lu", api::get().mc_get_visited_states()); + XBT_INFO("Executed transitions = %lu", api::get().mc_get_executed_trans()); } void SafetyChecker::run() @@ -88,13 +83,17 @@ void SafetyChecker::run() XBT_DEBUG("**************************************************"); XBT_VERB("Exploration depth=%zu (state=%p, num %d)(%zu interleave)", stack_.size(), state, state->num_, - state->interleave_size()); + state->count_todo()); - mc_model_checker->visited_states++; + api::get().mc_inc_visited_states(); // Backtrack if we reached the maximum depth if (stack_.size() > (std::size_t)_sg_mc_max_depth) { - XBT_WARN("/!\\ Max depth reached ! /!\\ "); + if (reductionMode_ == ReductionMode::dpor) { + XBT_ERROR("/!\\ Max depth reached! THIS WILL PROBABLY BREAK the dpor reduction /!\\"); + XBT_ERROR("/!\\ If bad things happen, disable dpor with --cfg=model-check/reduction:none /!\\"); + } else + XBT_WARN("/!\\ Max depth reached ! /!\\ "); this->backtrack(); continue; } @@ -111,31 +110,35 @@ void SafetyChecker::run() // Search an enabled transition in the current state; backtrack if the interleave set is empty // get_request also sets state.transition to be the one corresponding to the returned req - smx_simcall_t req = MC_state_choose_request(state); + smx_simcall_t req = api::get().mc_state_choose_request(state); // req is now the transition of the process that was selected to be executed if (req == nullptr) { - XBT_DEBUG("There are no more processes to interleave. (depth %zu)", stack_.size() + 1); + XBT_DEBUG("There remains %zu actors, but no more processes to interleave. (depth %zu)", + mc_model_checker->get_remote_process().actors().size(), stack_.size() + 1); + if (mc_model_checker->get_remote_process().actors().empty()) + mc_model_checker->finalize_app(); this->backtrack(); continue; } // 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", request_to_string(req, state->transition_.argument_, RequestType::simix).c_str()); + XBT_DEBUG("Execute: %s", api::get().request_to_string(req, state->transition_.times_considered_).c_str()); std::string req_str; if (dot_output != nullptr) - req_str = request_get_dot_output(req, state->transition_.argument_); + req_str = api::get().request_get_dot_output(req, state->transition_.times_considered_); - mc_model_checker->executed_transitions++; + api::get().mc_inc_executed_trans(); /* Actually answer the request: let execute the selected request (MCed does one step) */ - this->get_session().execute(state->transition_); + api::get().execute(state->transition_, &state->executed_req_); /* Create the new expanded state (copy the state of MCed into our MCer data) */ - std::unique_ptr next_state = std::unique_ptr(new State(++expanded_states_count_)); + ++expanded_states_count_; + auto next_state = std::make_unique(expanded_states_count_); if (_sg_mc_termination) this->check_non_termination(next_state.get()); @@ -147,10 +150,11 @@ void SafetyChecker::run() /* If this is a new state (or if we don't care about state-equality reduction) */ if (visited_state_ == nullptr) { /* Get an enabled process and insert it in the interleave set of the next state */ - for (auto& remoteActor : mc_model_checker->process().actors()) { + auto actors = api::get().get_actors(); + for (auto& remoteActor : actors) { auto actor = remoteActor.copy.get_buffer(); - if (actor_is_enabled(actor)) { - next_state->add_interleaving_set(actor); + if (get_session().actor_is_enabled(actor->get_pid())) { + next_state->mark_todo(actor); if (reductionMode_ == ReductionMode::dpor) break; // With DPOR, we take the first enabled transition } @@ -168,18 +172,14 @@ void SafetyChecker::run() } XBT_INFO("No property violation found."); - session->log_state(); + api::get().log_state(); } void SafetyChecker::backtrack() { stack_.pop_back(); - /* Check for deadlocks */ - if (mc_model_checker->checkDeadlock()) { - MC_show_deadlock(); - throw DeadlockError(); - } + api::get().mc_check_deadlock(); /* Traverse the stack backwards until a state with a non empty interleave set is found, deleting all the states that * have it empty in the way. For each deleted state, check if the request that has generated it (from its @@ -190,45 +190,39 @@ void SafetyChecker::backtrack() std::unique_ptr state = std::move(stack_.back()); stack_.pop_back(); if (reductionMode_ == ReductionMode::dpor) { - smx_simcall_t req = &state->internal_req_; - if (req->call_ == SIMCALL_MUTEX_LOCK || req->call_ == SIMCALL_MUTEX_TRYLOCK) - xbt_die("Mutex is currently not supported with DPOR, use --cfg=model-check/reduction:none"); - - const smx_actor_t issuer = MC_smx_simcall_get_issuer(req); + kernel::actor::ActorImpl* issuer = api::get().simcall_get_issuer(&state->executed_req_); for (auto i = stack_.rbegin(); i != stack_.rend(); ++i) { State* prev_state = i->get(); - if (request_depend(req, &prev_state->internal_req_)) { + if (state->executed_req_.issuer_ == prev_state->executed_req_.issuer_) { + XBT_DEBUG("Simcall %s and %s with same issuer", SIMIX_simcall_name(state->executed_req_), + SIMIX_simcall_name(prev_state->executed_req_)); + break; + } else if (api::get().simcall_check_dependency(&state->internal_req_, &prev_state->internal_req_)) { if (XBT_LOG_ISENABLED(mc_safety, xbt_log_priority_debug)) { XBT_DEBUG("Dependent Transitions:"); - int value = prev_state->transition_.argument_; + int value = prev_state->transition_.times_considered_; smx_simcall_t prev_req = &prev_state->executed_req_; - XBT_DEBUG("%s (state=%d)", simgrid::mc::request_to_string(prev_req, value, RequestType::internal).c_str(), - prev_state->num_); - value = state->transition_.argument_; + XBT_DEBUG("%s (state=%d)", api::get().request_to_string(prev_req, value).c_str(), prev_state->num_); + value = state->transition_.times_considered_; prev_req = &state->executed_req_; - XBT_DEBUG("%s (state=%d)", simgrid::mc::request_to_string(prev_req, value, RequestType::executed).c_str(), - state->num_); + XBT_DEBUG("%s (state=%d)", api::get().request_to_string(prev_req, value).c_str(), state->num_); } if (not prev_state->actor_states_[issuer->get_pid()].is_done()) - prev_state->add_interleaving_set(issuer); + prev_state->mark_todo(issuer); else - XBT_DEBUG("Process %p is in done set", req->issuer_); - break; - } else if (req->issuer_ == prev_state->internal_req_.issuer_) { - XBT_DEBUG("Simcall %s and %s with same issuer", SIMIX_simcall_name(req->call_), - SIMIX_simcall_name(prev_state->internal_req_.call_)); + XBT_DEBUG("Actor %s %ld is in done set", api::get().get_actor_name(issuer).c_str(), issuer->get_pid()); break; } else { - const smx_actor_t previous_issuer = MC_smx_simcall_get_issuer(&prev_state->internal_req_); + const kernel::actor::ActorImpl* previous_issuer = api::get().simcall_get_issuer(&prev_state->executed_req_); XBT_DEBUG("Simcall %s, process %ld (state %d) and simcall %s, process %ld (state %d) are independent", - SIMIX_simcall_name(req->call_), issuer->get_pid(), state->num_, - SIMIX_simcall_name(prev_state->internal_req_.call_), previous_issuer->get_pid(), prev_state->num_); + SIMIX_simcall_name(state->executed_req_), issuer->get_pid(), state->num_, + SIMIX_simcall_name(prev_state->executed_req_), previous_issuer->get_pid(), prev_state->num_); } } } - if (state->interleave_size() && stack_.size() < (std::size_t)_sg_mc_max_depth) { + if (state->count_todo() && stack_.size() < (std::size_t)_sg_mc_max_depth) { /* We found a back-tracking point, let's loop */ XBT_DEBUG("Back-tracking to state %d at depth %zu", state->num_, stack_.size() + 1); stack_.push_back(std::move(state)); @@ -244,27 +238,26 @@ void SafetyChecker::backtrack() void SafetyChecker::restore_state() { /* Intermediate backtracking */ - State* last_state = stack_.back().get(); + const State* last_state = stack_.back().get(); if (last_state->system_state_) { - last_state->system_state_->restore(&mc_model_checker->process()); + api::get().restore_state(last_state->system_state_); return; } - /* Restore the initial state */ - session->restore_initial_state(); + get_session().restore_initial_state(); /* Traverse the stack from the state at position start and re-execute the transitions */ for (std::unique_ptr const& state : stack_) { if (state == stack_.back()) break; - session->execute(state->transition_); + api::get().execute(state->transition_, &state->executed_req_); /* Update statistics */ - mc_model_checker->visited_states++; - mc_model_checker->executed_transitions++; + api::get().mc_inc_visited_states(); + api::get().mc_inc_executed_trans(); } } -SafetyChecker::SafetyChecker(Session& s) : Checker(s) +SafetyChecker::SafetyChecker(Session* session) : Checker(session) { reductionMode_ = reduction_mode; if (_sg_mc_termination) @@ -278,19 +271,22 @@ SafetyChecker::SafetyChecker(Session& s) : Checker(s) XBT_INFO("Check a safety property. Reduction is: %s.", (reductionMode_ == ReductionMode::none ? "none" : (reductionMode_ == ReductionMode::dpor ? "dpor" : "unknown"))); - session->initialize(); + + get_session().take_initial_snapshot(); XBT_DEBUG("Starting the safety algorithm"); - std::unique_ptr initial_state = std::unique_ptr(new State(++expanded_states_count_)); + ++expanded_states_count_; + auto initial_state = std::make_unique(expanded_states_count_); XBT_DEBUG("**************************************************"); XBT_DEBUG("Initial state"); /* Get an enabled actor and insert it in the interleave set of the initial state */ - for (auto& actor : mc_model_checker->process().actors()) - if (actor_is_enabled(actor.copy.get_buffer())) { - initial_state->add_interleaving_set(actor.copy.get_buffer()); + auto actors = api::get().get_actors(); + for (auto& actor : actors) + if (get_session().actor_is_enabled(actor.copy.get_buffer()->get_pid())) { + initial_state->mark_todo(actor.copy.get_buffer()); if (reductionMode_ != ReductionMode::none) break; } @@ -298,9 +294,9 @@ SafetyChecker::SafetyChecker(Session& s) : Checker(s) stack_.push_back(std::move(initial_state)); } -Checker* createSafetyChecker(Session& s) +Checker* create_safety_checker(Session* session) { - return new SafetyChecker(s); + return new SafetyChecker(session); } } // namespace mc