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"
12 * @brief (Cross-process, MCer/MCed) Access to SMX structures
14 * We copy some C data structure from the MCed process in the MCer process.
15 * This is implemented by:
17 * - `model_checker->process.smx_process_infos`
18 * (copy of `EngineImpl::actor_list_`);
20 * - `model_checker->hostnames`.
22 * The process lists are currently refreshed each time MCed code is executed.
23 * We don't try to give a persistent MCer address for a given MCed process.
24 * For this reason, a MCer simgrid::mc::Process* is currently not reusable after
28 /** Load the remote list of processes into a vector
30 * @param process MCed process
31 * @param target Local vector (to be filled with `simgrid::mc::ActorInformation`)
32 * @param remote_dynar Address of the process dynar in the remote list
34 static void MC_process_refresh_simix_actor_dynar(const simgrid::mc::RemoteProcess* process,
35 std::vector<simgrid::mc::ActorInformation>& target,
36 simgrid::mc::RemotePtr<s_xbt_dynar_t> remote_dynar)
41 process->read_bytes(&dynar, sizeof(dynar), remote_dynar);
43 auto* data = static_cast<simgrid::kernel::actor::ActorImpl**>(::operator new(dynar.elmsize * dynar.used));
44 process->read_bytes(data, dynar.elmsize * dynar.used, simgrid::mc::RemotePtr<void>(dynar.data));
46 // Load each element of the vector from the MCed process:
47 for (unsigned int i = 0; i < dynar.used; ++i) {
48 simgrid::mc::ActorInformation info;
50 info.address = simgrid::mc::RemotePtr<simgrid::kernel::actor::ActorImpl>(data[i]);
51 process->read_bytes(&info.copy, sizeof(info.copy), simgrid::mc::remote(data[i]));
52 target.push_back(std::move(info));
54 ::operator delete(data);
56 namespace simgrid::mc {
58 void RemoteProcess::refresh_simix()
60 if (this->cache_flags_ & RemoteProcess::cache_simix_processes)
63 MC_process_refresh_simix_actor_dynar(this, this->smx_actors_infos, actors_addr_);
65 this->cache_flags_ |= RemoteProcess::cache_simix_processes;
68 } // namespace simgrid::mc