-/* Copyright (c) 2015-2019. The SimGrid Team. All rights reserved. */
+/* Copyright (c) 2015-2022. 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/s4u/Host.hpp"
#include "src/mc/ModelChecker.hpp"
-#include "src/mc/mc_smx.hpp"
+#include "src/mc/remote/RemoteProcess.hpp"
-using simgrid::mc::remote;
-
-/** HACK, Statically "upcast" a s_smx_actor_t into a ActorInformation
+/** @file
+ * @brief (Cross-process, MCer/MCed) Access to SMX structures
+ *
+ * We copy some C data structure from the MCed process in the MCer process.
+ * This is implemented by:
+ *
+ * - `model_checker->process.smx_process_infos`
+ * (copy of `EngineImpl::actor_list_`);
*
- * This gets 'actorInfo' from '&actorInfo->copy'. It upcasts in the
- * sense that we could achieve the same thing by having ActorInformation
- * inherit from s_smx_actor_t but we don't really want to do that.
+ * - `model_checker->hostnames`.
+ *
+ * The process lists are currently refreshed each time MCed code is executed.
+ * We don't try to give a persistent MCer address for a given MCed process.
+ * For this reason, a MCer simgrid::mc::Process* is currently not reusable after
+ * MCed code.
*/
-static inline simgrid::mc::ActorInformation* actor_info_cast(smx_actor_t actor)
-{
- simgrid::mc::ActorInformation temp;
- std::size_t offset = (char*)temp.copy.get_buffer() - (char*)&temp;
-
- simgrid::mc::ActorInformation* process_info = (simgrid::mc::ActorInformation*)((char*)actor - offset);
- return process_info;
-}
/** Load the remote list of processes into a vector
*
* @param process MCed process
- * @param target Local vector (to be filled with copies of `s_smx_actor_t`)
+ * @param target Local vector (to be filled with `simgrid::mc::ActorInformation`)
* @param remote_dynar Address of the process dynar in the remote list
*/
-static void MC_process_refresh_simix_actor_dynar(simgrid::mc::RemoteClient* process,
+static void MC_process_refresh_simix_actor_dynar(const simgrid::mc::RemoteProcess* process,
std::vector<simgrid::mc::ActorInformation>& target,
simgrid::mc::RemotePtr<s_xbt_dynar_t> remote_dynar)
{
s_xbt_dynar_t dynar;
process->read_bytes(&dynar, sizeof(dynar), remote_dynar);
- smx_actor_t* data = static_cast<smx_actor_t*>(::operator new(dynar.elmsize * dynar.used));
+ auto* data = static_cast<simgrid::kernel::actor::ActorImpl**>(::operator new(dynar.elmsize * dynar.used));
process->read_bytes(data, dynar.elmsize * dynar.used, simgrid::mc::RemotePtr<void>(dynar.data));
// Load each element of the vector from the MCed process:
for (unsigned int i = 0; i < dynar.used; ++i) {
-
simgrid::mc::ActorInformation info;
+
info.address = simgrid::mc::RemotePtr<simgrid::kernel::actor::ActorImpl>(data[i]);
- info.hostname = nullptr;
- process->read_bytes(&info.copy, sizeof(info.copy), remote(data[i]));
+ process->read_bytes(&info.copy, sizeof(info.copy), simgrid::mc::remote(data[i]));
target.push_back(std::move(info));
}
::operator delete(data);
}
-namespace simgrid {
-namespace mc {
+namespace simgrid::mc {
-void RemoteClient::refresh_simix()
+void RemoteProcess::refresh_simix()
{
- if (this->cache_flags_ & RemoteClient::cache_simix_processes)
+ if (this->cache_flags_ & RemoteProcess::cache_simix_processes)
return;
- // TODO, avoid to reload `&simix_global`, `simix_global`, `*simix_global`
-
- static_assert(std::is_same<
- std::unique_ptr<simgrid::simix::Global>,
- decltype(simix_global)
- >::value, "Unexpected type for simix_global");
- static_assert(sizeof(simix_global) == sizeof(simgrid::simix::Global*),
- "Bad size for simix_global");
+ MC_process_refresh_simix_actor_dynar(this, this->smx_actors_infos, actors_addr_);
- RemotePtr<simgrid::simix::Global> simix_global_p{this->read_variable<simgrid::simix::Global*>("simix_global")};
-
- // simix_global = REMOTE(*simix_global)
- Remote<simgrid::simix::Global> simix_global =
- this->read<simgrid::simix::Global>(simix_global_p);
-
- MC_process_refresh_simix_actor_dynar(this, this->smx_actors_infos, remote(simix_global.get_buffer()->actors_vector));
- MC_process_refresh_simix_actor_dynar(this, this->smx_dead_actors_infos,
- remote(simix_global.get_buffer()->dead_actors_vector));
-
- this->cache_flags_ |= RemoteClient::cache_simix_processes;
+ this->cache_flags_ |= RemoteProcess::cache_simix_processes;
}
-}
-}
-
-/** Get the issuer of a simcall (`req->issuer`)
- *
- * In split-process mode, it does the black magic necessary to get an address
- * of a (shallow) copy of the data structure the issuer SIMIX actor in the local
- * address space.
- *
- * @param process the MCed process
- * @param req the simcall (copied in the local process)
- */
-smx_actor_t MC_smx_simcall_get_issuer(s_smx_simcall const* req)
-{
- xbt_assert(mc_model_checker != nullptr);
-
- // This is the address of the smx_actor in the MCed process:
- auto address = simgrid::mc::remote(req->issuer_);
-
- // Lookup by address:
- for (auto& actor : mc_model_checker->process().actors())
- if (actor.address == address)
- return actor.copy.get_buffer();
- for (auto& actor : mc_model_checker->process().dead_actors())
- if (actor.address == address)
- return actor.copy.get_buffer();
-
- xbt_die("Issuer not found");
-}
-
-const char* MC_smx_actor_get_host_name(smx_actor_t actor)
-{
- if (mc_model_checker == nullptr)
- return actor->get_host()->get_cname();
-
- simgrid::mc::RemoteClient* process = &mc_model_checker->process();
-
- // Read the simgrid::xbt::string in the MCed process:
- simgrid::mc::ActorInformation* info = actor_info_cast(actor);
- auto remote_string_address = remote((simgrid::xbt::string_data*)&actor->get_host()->get_name());
- simgrid::xbt::string_data remote_string = process->read(remote_string_address);
- char hostname[remote_string.len];
- process->read_bytes(hostname, remote_string.len + 1, remote(remote_string.data));
- info->hostname = mc_model_checker->get_host_name(hostname).c_str();
- return info->hostname;
-}
-
-const char* MC_smx_actor_get_name(smx_actor_t actor)
-{
- simgrid::mc::RemoteClient* process = &mc_model_checker->process();
- if (mc_model_checker == nullptr)
- return actor->get_cname();
-
- simgrid::mc::ActorInformation* info = actor_info_cast(actor);
- if (info->name.empty()) {
- simgrid::xbt::string_data string_data = simgrid::xbt::string::to_string_data(actor->name_);
- info->name = process->read_string(remote(string_data.data), string_data.len);
- }
- return info->name.c_str();
-}
-
-unsigned long MC_smx_get_maxpid()
-{
- unsigned long maxpid;
- const char* name = "simgrid::kernel::actor::maxpid";
- if (mc_model_checker->process().find_variable(name) == nullptr)
- name = "maxpid"; // We seem to miss the namespaces when compiling with GCC
- mc_model_checker->process().read_variable(name, &maxpid, sizeof(maxpid));
- return maxpid;
-}
+} // namespace simgrid::mc
