X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/46448320f12d59d0a5efc015ec51ec6ebba525c6..b9684d3607aa558c95b7185ddf147b478a7e367f:/src/mc/mc_smx.cpp diff --git a/src/mc/mc_smx.cpp b/src/mc/mc_smx.cpp index 7ef07f57fe..b7135d6a59 100644 --- a/src/mc/mc_smx.cpp +++ b/src/mc/mc_smx.cpp @@ -4,79 +4,64 @@ /* 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 +#include +#include + +#include #include +#include +#include -#include "simix/smx_private.h" +#include "src/simix/smx_private.h" -#include "mc_smx.h" -#include "ModelChecker.hpp" +#include "src/mc/mc_smx.h" +#include "src/mc/ModelChecker.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); -} - +/** HACK, Statically "upcast" a s_smx_process_t into a SimixProcessInformation + * + * This gets 'processInfo' from '&processInfo->copy'. It upcasts in the + * sense that we could achieve the same thing by having SimixProcessInformation + * inherit from s_smx_process_t but we don't really want to do that. + */ static inline -bool is_in_dynar(smx_process_t p, xbt_dynar_t dynar) +simgrid::mc::SimixProcessInformation* process_info_cast(smx_process_t p) { - return (uintptr_t) p >= (uintptr_t) dynar->data - && (uintptr_t) p < ((uintptr_t) dynar->data + dynar->used * dynar->elmsize); -} + simgrid::mc::SimixProcessInformation temp; + std::size_t offset = (char*) temp.copy.getBuffer() - (char*)&temp; -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)); + simgrid::mc::SimixProcessInformation* process_info = + (simgrid::mc::SimixProcessInformation*) ((char*) p - offset); return process_info; } -/** Load the remote swag of processes into a dynar +/** Load the remote swag of processes into a vector * * @param process MCed process - * @param target Local dynar (to be filled with copies of `s_smx_process_t`) + * @param target Local vector (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) + std::vector& target, xbt_swag_t remote_swag) { + target.clear(); + // 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: + // Load each element of the vector from the MCed process: int i = 0; - for (p = (smx_process_t) swag.head; p; ++i) { + for (smx_process_t p = (smx_process_t) swag.head; p; ++i) { - s_mc_smx_process_info_t info; + simgrid::mc::SimixProcessInformation info; info.address = p; - info.name = NULL; - info.hostname = NULL; + info.hostname = nullptr; process->read_bytes(&info.copy, sizeof(info.copy), remote(p)); - xbt_dynar_push(target, &info); + target.push_back(std::move(info)); // Lookup next process address: p = (smx_process_t) xbt_swag_getNext(&info.copy, swag.offset); @@ -84,29 +69,34 @@ static void MC_process_refresh_simix_process_list( assert(i == swag.count); } -void MC_process_smx_refresh(simgrid::mc::Process* process) +namespace simgrid { +namespace mc { + +void Process::refresh_simix() { - xbt_assert(mc_mode == MC_MODE_SERVER); - if (process->cache_flags & MC_PROCESS_CACHE_FLAG_SIMIX_PROCESSES) + if (this->cache_flags_ & Process::cache_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)); + this->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), + simgrid::simix::Global simix_global; + this->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); + this, this->smx_process_infos, simix_global.process_list); MC_process_refresh_simix_process_list( - process, process->smx_old_process_infos, simix_global.process_to_destroy); + this, this->smx_old_process_infos, simix_global.process_to_destroy); - process->cache_flags |= MC_PROCESS_CACHE_FLAG_SIMIX_PROCESSES; + this->cache_flags_ |= Process::cache_simix_processes; +} + +} } /** Get the issuer of a simcall (`req->issuer`) @@ -118,110 +108,83 @@ void MC_process_smx_refresh(simgrid::mc::Process* process) * @param process the MCed process * @param req the simcall (copied in the local process) */ -smx_process_t MC_smx_simcall_get_issuer(smx_simcall_t req) +smx_process_t MC_smx_simcall_get_issuer(s_smx_simcall_t const* req) { - if (mc_mode == MC_MODE_CLIENT) - return req->issuer; - - MC_process_smx_refresh(&mc_model_checker->process()); + xbt_assert(mc_model_checker != nullptr); // This is the address of the smx_process in the MCed process: - void* address = req->issuer; - - unsigned i; - mc_smx_process_info_t p; + auto address = simgrid::mc::remote(req->issuer); // 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; + for (auto& p : mc_model_checker->process().simix_processes()) + if (p.address == address) + return p.copy.getBuffer(); + for (auto& p : mc_model_checker->process().old_simix_processes()) + if (p.address == address) + return p.copy.getBuffer(); 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) -{ - if (mc_mode == MC_MODE_CLIENT) - xbt_die("No process_info for local process is not enabled."); - - 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); + if (mc_model_checker == nullptr) + return sg_host_get_name(p->host); simgrid::mc::Process* process = &mc_model_checker->process(); - // 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) { - - // 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); - } + /* HACK, Horrible hack to find the offset of the id in the simgrid::s4u::Host. + + Offsetof is not supported for non-POD types but this should + work in practice for the targets currently supported by the MC + as long as we do not add funny features to the Host class + (such as virtual base). + + We are using a (C++11) unrestricted union in order to avoid + any construction/destruction of the simgrid::s4u::Host. + */ + union fake_host { + simgrid::s4u::Host host; + fake_host() {} + ~fake_host() {} + }; + fake_host foo; + const size_t offset = (char*) &foo.host.name() - (char*) &foo.host; + + // Read the simgrid::xbt::string in the MCed process: + simgrid::mc::SimixProcessInformation* info = process_info_cast(p); + auto remote_string_address = remote( + (simgrid::xbt::string_data*) ((char*) p->host + offset)); + 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); return info->hostname; } const char* MC_smx_process_get_name(smx_process_t p) { simgrid::mc::Process* process = &mc_model_checker->process(); - if (mc_mode == MC_MODE_CLIENT) - return p->name; - if (!p->name) - return NULL; - - mc_smx_process_info_t info = MC_smx_process_get_info(p); - if (!info->name) { - info->name = process->read_string(p->name); + if (mc_model_checker == nullptr) + return p->name.c_str(); + + simgrid::mc::SimixProcessInformation* info = process_info_cast(p); + if (info->name.empty()) { + simgrid::xbt::string_data string_data = (simgrid::xbt::string_data&)p->name; + info->name = process->read_string(remote(string_data.data), string_data.len); } - return info->name; + return info->name.c_str(); } -#ifdef HAVE_SMPI +#if HAVE_SMPI int MC_smpi_process_count(void) { - if (mc_mode == MC_MODE_CLIENT) + if (mc_model_checker == nullptr) return smpi_process_count(); - else { - int res; - mc_model_checker->process().read_variable("process_count", - &res, sizeof(res)); - return res; - } + int res; + mc_model_checker->process().read_variable("process_count", + &res, sizeof(res)); + return res; } #endif @@ -232,5 +195,3 @@ unsigned long MC_smx_get_maxpid(void) &maxpid, sizeof(maxpid)); return maxpid; } - -}