X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/26af220e017a088b56105b2f21fadecf7d6e2a88..f12b085d941522c6c45e47db742a7fdfedb832da:/src/mc/mc_base.cpp diff --git a/src/mc/mc_base.cpp b/src/mc/mc_base.cpp index 9144932640..90fedffd0a 100644 --- a/src/mc/mc_base.cpp +++ b/src/mc/mc_base.cpp @@ -1,161 +1,160 @@ -/* Copyright (c) 2008-2014. The SimGrid Team. - * All rights reserved. */ +/* Copyright (c) 2008-2017. 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 "mc_base.h" -#include "../simix/smx_private.h" -#include "mc/mc_record.h" -#include "mc/mc_replay.h" #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" -#ifdef HAVE_MC -#include "mc_process.h" -#include "ModelChecker.hpp" -#include "mc_protocol.h" -#include "mc_smx.h" -#include "mc_server.h" +using simgrid::mc::remote; #endif -extern "C" { +XBT_LOG_NEW_DEFAULT_CATEGORY(mc, "All MC categories"); -XBT_LOG_NEW_CATEGORY(mc, "All MC categories"); +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); +} -void MC_wait_for_requests(void) +namespace simgrid { +namespace mc { + +void wait_for_requests() { -#ifdef HAVE_MC - if (mc_mode == MC_MODE_SERVER) { - MC_server_wait_client(&mc_model_checker->process()); - return; - } +#if SIMGRID_HAVE_MC + xbt_assert(mc_model_checker == nullptr, "This must be called from the client"); #endif - smx_process_t process; - smx_simcall_t req; + smx_actor_t process; unsigned int iter; - while (!xbt_dynar_is_empty(simix_global->process_to_run)) { + while (not 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 && !MC_request_is_visible(req)) + smx_simcall_t req = &process->simcall; + if (req->call != SIMCALL_NONE && not simgrid::mc::request_is_visible(req)) SIMIX_simcall_handle(req, 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 } -int MC_request_is_enabled(smx_simcall_t req) +/** @brief returns if there this transition can proceed in a finite amount of time + * + * It is used in the model-checker to not get into self-deadlock where it would execute a never ending transition. + * + * 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. + * + */ +// Called from both MCer and MCed: +bool actor_is_enabled(smx_actor_t actor) { - unsigned int index = 0; - smx_synchro_t act = 0; -#ifdef HAVE_MC - s_smx_synchro_t temp_synchro; +#if SIMGRID_HAVE_MC + // If in the MCer, ask the client app since it has all the data + if (mc_model_checker != nullptr) { + return mc_model_checker->process().actor_is_enabled(actor->pid); + } #endif - switch (req->call) { - case SIMCALL_NONE: - return FALSE; - - case SIMCALL_COMM_WAIT: - /* FIXME: check also that src and dst processes are not suspended */ - act = simcall_comm_wait__get__comm(req); - -#ifdef HAVE_MC - // Fetch from MCed memory: - if (!MC_process_is_self(&mc_model_checker->process())) { - MC_process_read(&mc_model_checker->process(), MC_ADDRESS_SPACE_READ_FLAGS_NONE, - &temp_synchro, act, sizeof(temp_synchro), - MC_PROCESS_INDEX_ANY); - act = &temp_synchro; - } -#endif + // Now, we are in the client app, no need for remote memory reading. + smx_simcall_t req = &actor->simcall; - 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; - } else { + switch (req->call) { + case SIMCALL_NONE: + return false; + + case SIMCALL_COMM_WAIT: { + /* FIXME: check also that src and dst processes are not suspended */ + simgrid::kernel::activity::CommImpl* act = + static_cast(simcall_comm_wait__getraw__comm(req)); + + if (act->src_timeout || act->dst_timeout) { + /* If it has a timeout it will be always be enabled (regardless of who declared the timeout), + * 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.*/ - if (act->comm.detached && act->comm.src_proc == NULL - && act->comm.type == SIMIX_COMM_READY) - return (act->comm.dst_proc != NULL); + 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); } - return (act->comm.src_proc && act->comm.dst_proc); - - case SIMCALL_COMM_WAITANY: { -#ifdef HAVE_MC - // Read dynar: - s_xbt_dynar_t comms; - MC_process_read_simple(&mc_model_checker->process(), - &comms, simcall_comm_waitany__get__comms(req), sizeof(comms)); - // Read dynar buffer: - assert(comms.elmsize == sizeof(act)); - size_t buffer_size = comms.elmsize * comms.used; - char buffer[buffer_size]; - MC_process_read_simple(&mc_model_checker->process(), - buffer, comms.data, sizeof(buffer)); -#endif -#ifdef HAVE_MC - for (index = 0; index < comms.used; ++index) { - memcpy(&act, buffer + comms.elmsize * index, sizeof(act)); -#else - xbt_dynar_foreach(simcall_comm_waitany__get__comms(req), index, act) { -#endif + case SIMCALL_COMM_WAITANY: { + xbt_dynar_t comms; + simgrid::kernel::activity::CommImpl* act = + static_cast(simcall_comm_wait__getraw__comm(req)); -#ifdef HAVE_MC - // Fetch from MCed memory: - if (!MC_process_is_self(&mc_model_checker->process())) { - MC_process_read(&mc_model_checker->process(), MC_ADDRESS_SPACE_READ_FLAGS_NONE, - &temp_synchro, act, sizeof(temp_synchro), - MC_PROCESS_INDEX_ANY); - act = &temp_synchro; + comms = simcall_comm_waitany__get__comms(req); + + for (unsigned int index = 0; index < comms->used; ++index) { + act = xbt_dynar_get_as(comms, index, simgrid::kernel::activity::CommImpl*); + if (act->src_proc && act->dst_proc) + return true; } -#endif + return false; + } - if (act->comm.src_proc && act->comm.dst_proc) - return TRUE; + case SIMCALL_MUTEX_LOCK: { + smx_mutex_t mutex = simcall_mutex_lock__get__mutex(req); + + if (mutex->owner == nullptr) + return true; + else + return mutex->owner->pid == req->issuer->pid; } - return FALSE; - } - case SIMCALL_MUTEX_LOCK: { - smx_mutex_t mutex = simcall_mutex_lock__get__mutex(req); -#ifdef HAVE_MC - s_smx_mutex_t temp_mutex; - if (!MC_process_is_self(&mc_model_checker->process())) { - MC_process_read(&mc_model_checker->process(), MC_ADDRESS_SPACE_READ_FLAGS_NONE, - &temp_mutex, mutex, sizeof(temp_mutex), - MC_PROCESS_INDEX_ANY); - mutex = &temp_mutex; + case SIMCALL_SEM_ACQUIRE: { + static int warned = 0; + if (not warned) + XBT_INFO("Using semaphore in model-checked code is still experimental. Use at your own risk"); + warned = 1; + return true; } -#endif - if(mutex->owner == NULL) - return TRUE; - else -#ifdef HAVE_MC - // TODO, *(mutex->owner) :/ - return MC_smx_resolve_process(mutex->owner)->pid == - MC_smx_resolve_process(req->issuer)->pid; -#else - return mutex->owner->pid == req->issuer->pid; -#endif + + case SIMCALL_COND_WAIT: { + static int warned = 0; + if (not 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; + default: + /* The rest of the requests are always enabled */ + return true; } } -int MC_request_is_visible(smx_simcall_t req) +/* 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(smx_simcall_t req) { +#if SIMGRID_HAVE_MC + xbt_assert(mc_model_checker == nullptr, "This should be called from the client side"); +#endif + return req->call == SIMCALL_COMM_ISEND || req->call == SIMCALL_COMM_IRECV || req->call == SIMCALL_COMM_WAIT @@ -164,17 +163,11 @@ int MC_request_is_visible(smx_simcall_t req) || req->call == SIMCALL_COMM_TESTANY || req->call == SIMCALL_MC_RANDOM || req->call == SIMCALL_MUTEX_LOCK -#ifdef HAVE_MC - || req->call == SIMCALL_MC_SNAPSHOT - || req->call == SIMCALL_MC_COMPARE_SNAPSHOTS -#endif + || req->call == SIMCALL_MUTEX_TRYLOCK ; } -int MC_random(int min, int max) -{ - /*FIXME: return mc_current_state->executed_transition->random.value; */ - return simcall_mc_random(min, max); +} } static int prng_random(int min, int max) @@ -187,7 +180,7 @@ static int prng_random(int min, int max) // Use rejection in order to avoid skew unsigned long x; do { -#ifndef _XBT_WIN32 +#ifndef _WIN32 x = (unsigned long) random(); #else x = (unsigned long) rand(); @@ -198,35 +191,7 @@ static int prng_random(int min, int max) int simcall_HANDLER_mc_random(smx_simcall_t simcall, int min, int max) { - if (!MC_is_active() && !MC_record_path){ + if (not MC_is_active() && not MC_record_path) return prng_random(min, max); - } - return simcall->mc_value; } - -void MC_simcall_handle(smx_simcall_t req, int value) -{ -#ifndef HAVE_MC - SIMIX_simcall_handle(req, value); -#else - if (MC_process_is_self(&mc_model_checker->process())) { - SIMIX_simcall_handle(req, value); - return; - } - - unsigned i; - mc_smx_process_info_t pi = NULL; - - xbt_dynar_foreach_ptr(mc_model_checker->process().smx_process_infos, i, pi) { - if (req == &pi->copy.simcall) { - MC_server_simcall_handle(&mc_model_checker->process(), pi->copy.pid, value); - return; - } - } - - xbt_die("Could not find the request"); -#endif -} - -}