1 /* Copyright (c) 2015-2021. 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 `simix_global->process_list`);
21 * - `model_checker->process.smx_old_process_infos`
22 * (copy of `simix_global->actors_to_destroy`);
24 * - `model_checker->hostnames`.
26 * The process lists are currently refreshed each time MCed code is executed.
27 * We don't try to give a persistent MCer address for a given MCed process.
28 * For this reason, a MCer simgrid::mc::Process* is currently not reusable after
32 /** Load the remote list of processes into a vector
34 * @param process MCed process
35 * @param target Local vector (to be filled with copies of `s_smx_actor_t`)
36 * @param remote_dynar Address of the process dynar in the remote list
38 static void MC_process_refresh_simix_actor_dynar(const simgrid::mc::RemoteProcess* process,
39 std::vector<simgrid::mc::ActorInformation>& target,
40 simgrid::mc::RemotePtr<s_xbt_dynar_t> remote_dynar)
45 process->read_bytes(&dynar, sizeof(dynar), remote_dynar);
47 auto* data = static_cast<smx_actor_t*>(::operator new(dynar.elmsize * dynar.used));
48 process->read_bytes(data, dynar.elmsize * dynar.used, simgrid::mc::RemotePtr<void>(dynar.data));
50 // Load each element of the vector from the MCed process:
51 for (unsigned int i = 0; i < dynar.used; ++i) {
52 simgrid::mc::ActorInformation info;
54 info.address = simgrid::mc::RemotePtr<simgrid::kernel::actor::ActorImpl>(data[i]);
55 info.hostname = nullptr;
56 process->read_bytes(&info.copy, sizeof(info.copy), remote(data[i]));
57 target.push_back(std::move(info));
59 ::operator delete(data);
64 void RemoteProcess::refresh_simix()
66 if (this->cache_flags_ & RemoteProcess::cache_simix_processes)
69 MC_process_refresh_simix_actor_dynar(this, this->smx_actors_infos, actors_addr_);
70 MC_process_refresh_simix_actor_dynar(this, this->smx_dead_actors_infos, dead_actors_addr_);
72 this->cache_flags_ |= RemoteProcess::cache_simix_processes;