-/* Copyright (c) 2015. The SimGrid Team.
- * All rights reserved. */
+/* Copyright (c) 2015-2021. 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 <assert.h>
+#include "simgrid/s4u/Host.hpp"
-#include <xbt/log.h>
-
-#include "simix/smx_private.h"
-
-#include "mc_smx.h"
-#include "ModelChecker.hpp"
+#include "src/mc/ModelChecker.hpp"
+#include "src/mc/remote/RemoteProcess.hpp"
using simgrid::mc::remote;
-
-extern "C" {
-
-static
-void MC_smx_process_info_clear(mc_smx_process_info_t p)
-{
- p->hostname = NULL;
- free(p->name);
- p->name = NULL;
-}
-
-xbt_dynar_t MC_smx_process_info_list_new(void)
-{
- return xbt_dynar_new(
- sizeof(s_mc_smx_process_info_t),
- ( void_f_pvoid_t) &MC_smx_process_info_clear);
-}
-
-static inline
-bool is_in_dynar(smx_process_t p, xbt_dynar_t dynar)
-{
- return (uintptr_t) p >= (uintptr_t) dynar->data
- && (uintptr_t) p < ((uintptr_t) dynar->data + dynar->used * dynar->elmsize);
-}
-
-static inline
-mc_smx_process_info_t MC_smx_process_get_info(smx_process_t p)
-{
- assert(is_in_dynar(p, mc_model_checker->process().smx_process_infos)
- || is_in_dynar(p, mc_model_checker->process().smx_old_process_infos));
- mc_smx_process_info_t process_info =
- (mc_smx_process_info_t)
- ((char*) p - offsetof(s_mc_smx_process_info_t, copy));
- return process_info;
-}
-
-/** Load the remote swag of processes into a dynar
+/** @file
+ * @brief (Cross-process, MCer/MCed) Access to SMX structures
*
- * @param process MCed process
- * @param target Local dynar (to be filled with copies of `s_smx_process_t`)
- * @param remote_swag Address of the process SWAG in the remote list
- */
-static void MC_process_refresh_simix_process_list(
- simgrid::mc::Process* process,
- xbt_dynar_t target, xbt_swag_t remote_swag)
-{
- // swag = REMOTE(*simix_global->process_list)
- s_xbt_swag_t swag;
- process->read_bytes(&swag, sizeof(swag), remote(remote_swag));
-
- smx_process_t p;
- xbt_dynar_reset(target);
-
- // Load each element of the dynar from the MCed process:
- int i = 0;
- for (p = (smx_process_t) swag.head; p; ++i) {
-
- s_mc_smx_process_info_t info;
- info.address = p;
- info.name = NULL;
- info.hostname = NULL;
- process->read_bytes(&info.copy, sizeof(info.copy), remote(p));
- xbt_dynar_push(target, &info);
-
- // Lookup next process address:
- p = (smx_process_t) xbt_swag_getNext(&info.copy, swag.offset);
- }
- assert(i == swag.count);
-}
-
-void MC_process_smx_refresh(simgrid::mc::Process* process)
-{
- xbt_assert(mc_mode == MC_MODE_SERVER);
- xbt_assert(!process->is_self());
- if (process->cache_flags & MC_PROCESS_CACHE_FLAG_SIMIX_PROCESSES)
- return;
-
- // TODO, avoid to reload `&simix_global`, `simix_global`, `*simix_global`
-
- // simix_global_p = REMOTE(simix_global);
- smx_global_t simix_global_p;
- process->read_variable("simix_global", &simix_global_p, sizeof(simix_global_p));
-
- // simix_global = REMOTE(*simix_global)
- s_smx_global_t simix_global;
- process->read_bytes(&simix_global, sizeof(simix_global),
- remote(simix_global_p));
-
- MC_process_refresh_simix_process_list(
- process, process->smx_process_infos, simix_global.process_list);
- MC_process_refresh_simix_process_list(
- process, process->smx_old_process_infos, simix_global.process_to_destroy);
-
- process->cache_flags |= MC_PROCESS_CACHE_FLAG_SIMIX_PROCESSES;
-}
-
-/** Get the issuer of a simcall (`req->issuer`)
+ * We copy some C data structure from the MCed process in the MCer process.
+ * This is implemented by:
*
- * 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 process in the local
- * address space.
+ * - `model_checker->process.smx_process_infos`
+ * (copy of `EngineImpl::actor_list_`);
*
- * @param process the MCed process
- * @param req the simcall (copied in the local process)
+ * - `model_checker->process.smx_old_process_infos`
+ * (copy of `EngineImpl::actors_to_destroy_`);
+ *
+ * - `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.
*/
-smx_process_t MC_smx_simcall_get_issuer(smx_simcall_t req)
-{
- if (mc_mode == MC_MODE_CLIENT)
- return req->issuer;
-
- MC_process_smx_refresh(&mc_model_checker->process());
-
- // This is the address of the smx_process in the MCed process:
- void* address = req->issuer;
-
- unsigned i;
- mc_smx_process_info_t p;
-
- // Lookup by address:
- xbt_dynar_foreach_ptr(mc_model_checker->process().smx_process_infos, i, p)
- if (p->address == address)
- return &p->copy;
- xbt_dynar_foreach_ptr(mc_model_checker->process().smx_old_process_infos, i, p)
- if (p->address == address)
- return &p->copy;
-
- xbt_die("Issuer not found");
-}
-
-smx_process_t MC_smx_resolve_process(smx_process_t process_remote_address)
-{
- if (!process_remote_address)
- return NULL;
- if (mc_mode == MC_MODE_CLIENT)
- return process_remote_address;
- mc_smx_process_info_t process_info = MC_smx_resolve_process_info(process_remote_address);
- if (process_info)
- return &process_info->copy;
- else
- return NULL;
-}
-
-mc_smx_process_info_t MC_smx_resolve_process_info(smx_process_t process_remote_address)
+/** 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 remote_dynar Address of the process dynar in the remote list
+ */
+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)
{
- if (mc_mode == MC_MODE_CLIENT)
- xbt_die("No process_info for local process is not enabled.");
+ target.clear();
- unsigned index;
- mc_smx_process_info_t process_info;
- xbt_dynar_foreach_ptr(mc_model_checker->process().smx_process_infos, index, process_info)
- if (process_info->address == process_remote_address)
- return process_info;
- xbt_dynar_foreach_ptr(mc_model_checker->process().smx_old_process_infos, index, process_info)
- if (process_info->address == process_remote_address)
- return process_info;
- xbt_die("Process info not found");
-}
-
-const char* MC_smx_process_get_host_name(smx_process_t p)
-{
- if (mc_mode == MC_MODE_CLIENT)
- return SIMIX_host_get_name(p->host);
+ s_xbt_dynar_t dynar;
+ process->read_bytes(&dynar, sizeof(dynar), remote_dynar);
- simgrid::mc::Process* process = &mc_model_checker->process();
+ auto* data = static_cast<smx_actor_t*>(::operator new(dynar.elmsize * dynar.used));
+ process->read_bytes(data, dynar.elmsize * dynar.used, simgrid::mc::RemotePtr<void>(dynar.data));
- // Currently, smx_host_t = xbt_dictelm_t.
- // TODO, add an static_assert on this if switching to C++
- // The host name is host->key and the host->key_len==strlen(host->key).
- s_xbt_dictelm_t host_copy;
- mc_smx_process_info_t info = MC_smx_process_get_info(p);
- if (!info->hostname) {
+ // Load each element of the vector from the MCed process:
+ for (unsigned int i = 0; i < dynar.used; ++i) {
+ simgrid::mc::ActorInformation info;
- // Read the hostname from the MCed process:
- process->read_bytes(&host_copy, sizeof(host_copy), remote(p->host));
- int len = host_copy.key_len + 1;
- char hostname[len];
- process->read_bytes(hostname, len, remote(host_copy.key));
- info->hostname = mc_model_checker->get_host_name(hostname);
+ info.address = simgrid::mc::RemotePtr<simgrid::kernel::actor::ActorImpl>(data[i]);
+ process->read_bytes(&info.copy, sizeof(info.copy), remote(data[i]));
+ target.push_back(std::move(info));
}
- return info->hostname;
+ ::operator delete(data);
}
+namespace simgrid {
+namespace mc {
-const char* MC_smx_process_get_name(smx_process_t p)
+void RemoteProcess::refresh_simix()
{
- simgrid::mc::Process* process = &mc_model_checker->process();
- if (mc_mode == MC_MODE_CLIENT)
- return p->name;
- if (!p->name)
- return NULL;
+ if (this->cache_flags_ & RemoteProcess::cache_simix_processes)
+ return;
- mc_smx_process_info_t info = MC_smx_process_get_info(p);
- if (!info->name) {
- info->name = process->read_string(p->name);
- }
- return info->name;
-}
+ MC_process_refresh_simix_actor_dynar(this, this->smx_actors_infos, actors_addr_);
+ MC_process_refresh_simix_actor_dynar(this, this->smx_dead_actors_infos, dead_actors_addr_);
-int MC_smpi_process_count(void)
-{
- if (mc_mode == MC_MODE_CLIENT)
- return smpi_process_count();
- else {
- int res;
- mc_model_checker->process().read_variable("process_count",
- &res, sizeof(res));
- return res;
- }
+ this->cache_flags_ |= RemoteProcess::cache_simix_processes;
}
-unsigned long MC_smx_get_maxpid(void)
-{
- unsigned long maxpid;
- mc_model_checker->process().read_variable("simix_process_maxpid",
- &maxpid, sizeof(maxpid));
- return maxpid;
}
-
}