-/* 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 <simgrid_config.h>
-
-#include "mc/mc.h"
-#include "src/mc/mc_base.h"
-#include "src/mc/mc_replay.h"
-#include "src/simix/smx_private.h"
+#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 "src/mc/mc.h"
+#include "src/mc/mc_replay.hpp"
#if SIMGRID_HAVE_MC
#include "src/mc/ModelChecker.hpp"
-
-using simgrid::mc::remote;
+#include "src/mc/api/RemoteApp.hpp"
+#include "src/mc/remote/AppSide.hpp"
+#include "src/mc/remote/RemoteProcess.hpp"
#endif
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 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 (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 && not 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<aid_t, smx_actor_t> 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
* 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)
{
- // TODO, add support for the subtypes?
-
- 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<simgrid::kernel::activity::CommImpl*>(simcall_comm_wait__getraw__comm(req));
-
#if SIMGRID_HAVE_MC
- // Fetch from MCed memory:
- // HACK, type puning
- if (mc_model_checker != nullptr) {
- simgrid::mc::Remote<simgrid::kernel::activity::CommImpl> temp_comm;
- mc_model_checker->process().read(temp_comm, remote(act));
- act = static_cast<simgrid::kernel::activity::CommImpl*>(temp_comm.getBuffer());
- }
+ xbt_assert(mc_model_checker == nullptr, "This should be called from the client side");
#endif
- 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.*/
- 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::CommImpl* act =
- static_cast<simgrid::kernel::activity::CommImpl*>(simcall_comm_wait__getraw__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);
+ // Now, we are in the client app, no need for remote memory reading.
+ kernel::actor::Simcall* req = &actor->simcall_;
- // 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
+ if (req->observer_ != nullptr)
+ return req->observer_->is_enabled();
- for (unsigned int index = 0; index < comms->used; ++index) {
-#if SIMGRID_HAVE_MC
- // Fetch act from MCed memory:
- // HACK, type puning
- simgrid::mc::Remote<simgrid::kernel::activity::CommImpl> 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<simgrid::kernel::activity::CommImpl*>(temp_comm.getBuffer());
- }
- else
-#endif
- act = xbt_dynar_get_as(comms, index, simgrid::kernel::activity::CommImpl*);
- 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<simgrid::simix::MutexImpl> 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 (not 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 (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;
- }
-}
-
-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
- ;
-}
-
-}
+ else
+ /* The rest of the requests are always enabled */
+ return true;
}
-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
-
- // Use rejection in order to avoid skew
- unsigned long x;
- do {
-#ifndef _WIN32
- x = (unsigned long) random();
-#else
- x = (unsigned long) rand();
+#if SIMGRID_HAVE_MC
+ xbt_assert(mc_model_checker == nullptr, "This should be called from the client side");
#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 (not MC_is_active() && not MC_record_path)
- return prng_random(min, max);
- return simcall->mc_value;
-}
+} // namespace simgrid::mc
