X-Git-Url: http://bilbo.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/aceb880ccaea97ba93e72cc862ba5954c85f321b..6051369d9427154f912e8affc417f20a26a0eb95:/src/mc/mc_base.cpp diff --git a/src/mc/mc_base.cpp b/src/mc/mc_base.cpp index 681efc334e..9791f51e71 100644 --- a/src/mc/mc_base.cpp +++ b/src/mc/mc_base.cpp @@ -1,59 +1,37 @@ -/* Copyright (c) 2008-2017. The SimGrid Team. All rights reserved. */ +/* Copyright (c) 2008-2023. 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 "src/mc/mc_base.hpp" +#include "src/kernel/EngineImpl.hpp" +#include "src/kernel/activity/CommImpl.hpp" +#include "src/kernel/activity/MutexImpl.hpp" +#include "src/kernel/actor/SimcallObserver.hpp" -#include "mc/mc.h" -#include "src/mc/mc_base.h" -#include "src/mc/mc_replay.h" -#include "src/simix/smx_private.h" - -#if SIMGRID_HAVE_MC -#include "src/mc/ModelChecker.hpp" - -using simgrid::mc::remote; -#endif +#include "src/mc/mc.h" +#include "src/mc/mc_config.hpp" +#include "src/mc/mc_replay.hpp" XBT_LOG_NEW_DEFAULT_CATEGORY(mc, "All MC categories"); +bool simgrid_mc_replay_show_backtraces = false; -int MC_random(int min, int max) -{ -#if SIMGRID_HAVE_MC - xbt_assert(mc_model_checker == nullptr); -#endif - /* TODO, if the MC is disabled we do not really need to make a simcall for this :) */ - return simcall_mc_random(min, max); -} - -namespace simgrid { -namespace mc { +namespace simgrid::mc { -void wait_for_requests(void) +void execute_actors() { -#if SIMGRID_HAVE_MC - xbt_assert(mc_model_checker == nullptr); -#endif - - smx_actor_t process; - smx_simcall_t req; - unsigned int iter; - - while (!xbt_dynar_is_empty(simix_global->process_to_run)) { - SIMIX_process_runall(); - xbt_dynar_foreach(simix_global->process_that_ran, iter, process) { - req = &process->simcall; - if (req->call != SIMCALL_NONE && !simgrid::mc::request_is_visible(req)) - SIMIX_simcall_handle(req, 0); + auto* engine = kernel::EngineImpl::get_instance(); + + XBT_DEBUG("execute_actors: %lu of %zu to run (%s)", engine->get_actor_to_run_count(), engine->get_actor_count(), + (MC_record_replay_is_active() ? "replay active" : "no replay")); + while (engine->has_actors_to_run()) { + engine->run_all_actors(); + for (auto const& actor : engine->get_actors_that_ran()) { + const kernel::actor::Simcall* req = &actor->simcall_; + if (req->call_ != kernel::actor::Simcall::Type::NONE && not simgrid::mc::request_is_visible(req)) + actor->simcall_handle(0); } } -#if SIMGRID_HAVE_MC - xbt_dynar_reset(simix_global->actors_vector); - for (std::pair kv : simix_global->process_list) { - xbt_dynar_push_as(simix_global->actors_vector, smx_actor_t, kv.second); - } -#endif } /** @brief returns if there this transition can proceed in a finite amount of time @@ -63,179 +41,39 @@ void wait_for_requests(void) * Only WAIT operations (on comm, on mutex, etc) can ever return false because they could lock the MC exploration. * Wait operations are OK and return true in only two situations: * - if the wait will succeed immediately (if both peer of the comm are there already or if the mutex is available) - * - if a timeout is provided, because we can fire the timeout if the transition is not ready without blocking in this transition for ever. - * + * - if a timeout is provided, because we can fire the timeout if the transition is not ready without blocking in this + * transition for ever. + * This is controlled in the is_enabled() method of the corresponding observers. */ -// Called from both MCer and MCed: -bool request_is_enabled(smx_simcall_t req) +bool actor_is_enabled(kernel::actor::ActorImpl* actor) { - unsigned int index = 0; - // TODO, add support for the subtypes? + xbt_assert(get_model_checking_mode() != ModelCheckingMode::CHECKER_SIDE, + "This should be called from the client side"); - switch (req->call) { - case SIMCALL_NONE: - return false; + // Now, we are in the client app, no need for remote memory reading. + kernel::actor::Simcall* req = &actor->simcall_; - case SIMCALL_COMM_WAIT: - { - /* FIXME: check also that src and dst processes are not suspended */ - simgrid::kernel::activity::Comm *act = - static_cast(simcall_comm_wait__get__comm(req)); + if (req->observer_ != nullptr) + return req->observer_->is_enabled(); -#if SIMGRID_HAVE_MC - // Fetch from MCed memory: - // HACK, type puning - if (mc_model_checker != nullptr) { - simgrid::mc::Remote temp_comm; - mc_model_checker->process().read(temp_comm, remote(act)); - act = static_cast(temp_comm.getBuffer()); - } -#endif - - if (simcall_comm_wait__get__timeout(req) >= 0) { - /* If it has a timeout it will be always be enabled, because even if the - * communication is not ready, it can timeout and won't block. */ - if (_sg_mc_timeout == 1) - return true; - } - /* On the other hand if it hasn't a timeout, check if the comm is ready.*/ - else if (act->detached && act->src_proc == nullptr - && act->type == SIMIX_COMM_READY) - return (act->dst_proc != nullptr); - return (act->src_proc && act->dst_proc); - } - - case SIMCALL_COMM_WAITANY: { - xbt_dynar_t comms; - simgrid::kernel::activity::Comm *act = - static_cast(simcall_comm_wait__get__comm(req)); - -#if SIMGRID_HAVE_MC - s_xbt_dynar_t comms_buffer; - size_t buffer_size = 0; - if (mc_model_checker != nullptr) { - // Read dynar: - mc_model_checker->process().read( - &comms_buffer, remote(simcall_comm_waitany__get__comms(req))); - assert(comms_buffer.elmsize == sizeof(act)); - buffer_size = comms_buffer.elmsize * comms_buffer.used; - comms = &comms_buffer; - } else - comms = simcall_comm_waitany__get__comms(req); - - // Read all the dynar buffer: - char buffer[buffer_size]; - if (mc_model_checker != nullptr) - mc_model_checker->process().read_bytes(buffer, sizeof(buffer), - remote(comms->data)); -#else - comms = simcall_comm_waitany__get__comms(req); -#endif - - for (index = 0; index < comms->used; ++index) { -#if SIMGRID_HAVE_MC - // Fetch act from MCed memory: - // HACK, type puning - simgrid::mc::Remote temp_comm; - if (mc_model_checker != nullptr) { - memcpy(&act, buffer + comms->elmsize * index, sizeof(act)); - mc_model_checker->process().read(temp_comm, remote(act)); - act = static_cast(temp_comm.getBuffer()); - } - else -#endif - act = xbt_dynar_get_as(comms, index, simgrid::kernel::activity::Comm*); - if (act->src_proc && act->dst_proc) - return true; - } + if (req->call_ == kernel::actor::Simcall::Type::NONE) return false; - } - - case SIMCALL_MUTEX_LOCK: { - smx_mutex_t mutex = simcall_mutex_lock__get__mutex(req); -#if SIMGRID_HAVE_MC - simgrid::mc::Remote temp_mutex; - if (mc_model_checker != nullptr) { - mc_model_checker->process().read(temp_mutex.getBuffer(), remote(mutex)); - mutex = temp_mutex.getBuffer(); - } -#endif - - if(mutex->owner == nullptr) - return true; -#if SIMGRID_HAVE_MC - else if (mc_model_checker != nullptr) { - simgrid::mc::Process& modelchecked = mc_model_checker->process(); - // TODO, *(mutex->owner) :/ - return modelchecked.resolveActor(simgrid::mc::remote(mutex->owner))->pid == - modelchecked.resolveActor(simgrid::mc::remote(req->issuer))->pid; - } -#endif - else - return mutex->owner->pid == req->issuer->pid; - } - - case SIMCALL_SEM_ACQUIRE: { - static int warned = 0; - if (!warned) - XBT_INFO("Using semaphore in model-checked code is still experimental. Use at your own risk"); - warned = 1; - return true; - } - - case SIMCALL_COND_WAIT: { - static int warned = 0; - if (!warned) - XBT_INFO("Using condition variables in model-checked code is still experimental. Use at your own risk"); - warned = 1; - return true; - } - - default: - /* The rest of the requests are always enabled */ - return true; - } + else + /* The rest of the requests are always enabled */ + return true; } -bool request_is_visible(smx_simcall_t req) -{ - return req->call == SIMCALL_COMM_ISEND - || req->call == SIMCALL_COMM_IRECV - || req->call == SIMCALL_COMM_WAIT - || req->call == SIMCALL_COMM_WAITANY - || req->call == SIMCALL_COMM_TEST - || req->call == SIMCALL_COMM_TESTANY - || req->call == SIMCALL_MC_RANDOM - || req->call == SIMCALL_MUTEX_LOCK - || req->call == SIMCALL_MUTEX_TRYLOCK - ; -} - -} -} - -static int prng_random(int min, int max) +/* This is the list of requests that are visible from the checker algorithm. + * Any other requests are handled right away on the application side. + */ +bool request_is_visible(const kernel::actor::Simcall* req) { - unsigned long output_size = ((unsigned long) max - (unsigned long) min) + 1; - unsigned long input_size = (unsigned long) RAND_MAX + 1; - unsigned long reject_size = input_size % output_size; - unsigned long accept_size = input_size - reject_size; // module*accept_size + xbt_assert(get_model_checking_mode() != ModelCheckingMode::CHECKER_SIDE, + "This should be called from the client side"); - // Use rejection in order to avoid skew - unsigned long x; - do { -#ifndef _WIN32 - x = (unsigned long) random(); -#else - x = (unsigned long) rand(); -#endif - } while( x >= accept_size ); - return min + (x % output_size); + if (req->observer_ == nullptr) + return false; + return req->observer_->is_visible(); } -int simcall_HANDLER_mc_random(smx_simcall_t simcall, int min, int max) -{ - if (!MC_is_active() && !MC_record_path) - return prng_random(min, max); - return simcall->mc_value; -} +} // namespace simgrid::mc