1 /* Copyright (c) 2015-2022. The SimGrid Team. All rights reserved. */
3 /* This program is free software; you can redistribute it and/or modify it
4 * under the terms of the license (GNU LGPL) which comes with this package. */
6 #include "simgrid/s4u/Host.hpp"
8 #include "src/mc/ModelChecker.hpp"
9 #include "src/mc/remote/RemoteProcess.hpp"
11 using simgrid::mc::remote;
13 * @brief (Cross-process, MCer/MCed) Access to SMX structures
15 * We copy some C data structure from the MCed process in the MCer process.
16 * This is implemented by:
18 * - `model_checker->process.smx_process_infos`
19 * (copy of `EngineImpl::actor_list_`);
21 * - `model_checker->hostnames`.
23 * The process lists are currently refreshed each time MCed code is executed.
24 * We don't try to give a persistent MCer address for a given MCed process.
25 * For this reason, a MCer simgrid::mc::Process* is currently not reusable after
29 /** Load the remote list of processes into a vector
31 * @param process MCed process
32 * @param target Local vector (to be filled with copies of `s_smx_actor_t`)
33 * @param remote_dynar Address of the process dynar in the remote list
35 static void MC_process_refresh_simix_actor_dynar(const simgrid::mc::RemoteProcess* process,
36 std::vector<simgrid::mc::ActorInformation>& target,
37 simgrid::mc::RemotePtr<s_xbt_dynar_t> remote_dynar)
42 process->read_bytes(&dynar, sizeof(dynar), remote_dynar);
44 auto* data = static_cast<smx_actor_t*>(::operator new(dynar.elmsize * dynar.used));
45 process->read_bytes(data, dynar.elmsize * dynar.used, simgrid::mc::RemotePtr<void>(dynar.data));
47 // Load each element of the vector from the MCed process:
48 for (unsigned int i = 0; i < dynar.used; ++i) {
49 simgrid::mc::ActorInformation info;
51 info.address = simgrid::mc::RemotePtr<simgrid::kernel::actor::ActorImpl>(data[i]);
52 process->read_bytes(&info.copy, sizeof(info.copy), remote(data[i]));
53 target.push_back(std::move(info));
55 ::operator delete(data);
60 void RemoteProcess::refresh_simix()
62 if (this->cache_flags_ & RemoteProcess::cache_simix_processes)
65 MC_process_refresh_simix_actor_dynar(this, this->smx_actors_infos, actors_addr_);
67 this->cache_flags_ |= RemoteProcess::cache_simix_processes;