+++ /dev/null
-/* Copyright (c) 2008-2014. 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 <assert.h>
-
-#include <simgrid/simix.h>
-
-#include "mc_base.h"
-#include "../simix/smx_private.h"
-#include "mc_record.h"
-
-#ifdef HAVE_MC
-#include "mc_process.h"
-#include "mc_model_checker.h"
-#include "mc_protocol.h"
-#include "mc_smx.h"
-#include "mc_server.h"
-#endif
-
-XBT_LOG_NEW_CATEGORY(mc, "All MC categories");
-
-void MC_wait_for_requests(void)
-{
-#ifdef HAVE_MC
- if (mc_mode == MC_MODE_SERVER) {
- MC_server_wait_client(&mc_model_checker->process);
- return;
- }
-#endif
-
- smx_process_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 && !MC_request_is_visible(req))
- SIMIX_simcall_handle(req, 0);
- }
- }
-}
-
-int MC_request_is_enabled(smx_simcall_t req)
-{
- unsigned int index = 0;
- smx_synchro_t act = 0;
-#ifdef HAVE_MC
- s_smx_synchro_t temp_synchro;
-#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_PROCESS_NO_FLAG,
- &temp_synchro, act, sizeof(temp_synchro),
- MC_PROCESS_INDEX_ANY);
- act = &temp_synchro;
- }
-#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;
- } else {
- /* 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);
- }
- 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
-
-#ifdef HAVE_MC
- // Fetch from MCed memory:
- if (!MC_process_is_self(&mc_model_checker->process)) {
- MC_process_read(&mc_model_checker->process, MC_PROCESS_NO_FLAG,
- &temp_synchro, act, sizeof(temp_synchro),
- MC_PROCESS_INDEX_ANY);
- act = &temp_synchro;
- }
-#endif
-
- if (act->comm.src_proc && act->comm.dst_proc)
- return TRUE;
- }
- 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_PROCESS_NO_FLAG,
- &temp_mutex, mutex, sizeof(temp_mutex),
- MC_PROCESS_INDEX_ANY);
- mutex = &temp_mutex;
- }
-#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
- }
-
- default:
- /* The rest of the requests are always enabled */
- return TRUE;
- }
-}
-
-int MC_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
-#ifdef HAVE_MC
- || req->call == SIMCALL_MC_SNAPSHOT
- || req->call == SIMCALL_MC_COMPARE_SNAPSHOTS
-#endif
- ;
-}
-
-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)
-{
- 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
-
- // Use rejection in order to avoid skew
- long x;
- do {
-#ifndef _XBT_WIN32
- x = random();
-#else
- x = rand();
-#endif
- } while( x >= accept_size );
- return min + (x % output_size);
-}
-
-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;
-}
